79ee194e52
If the user is trying to apply a Git generated diff file and they have specified a -p<n> option, where <n> is not 1, the user probably has a good reason for doing this. Such as they are me, trying to apply a patch generated in git.git for the git-gui subdirectory to the git-gui.git repository, where there is no git-gui subdirectory present. Users shouldn't supply -p2 unless they mean it. But if they are supplying it, they probably have thought about how to make this patch apply to their working directory, and want to risk whatever results may come from that. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2881 lines
69 KiB
C
2881 lines
69 KiB
C
/*
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* apply.c
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*
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* Copyright (C) Linus Torvalds, 2005
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*
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* This applies patches on top of some (arbitrary) version of the SCM.
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*
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*/
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#include "cache.h"
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#include "cache-tree.h"
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#include "quote.h"
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#include "blob.h"
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#include "delta.h"
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#include "builtin.h"
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/*
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* --check turns on checking that the working tree matches the
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* files that are being modified, but doesn't apply the patch
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* --stat does just a diffstat, and doesn't actually apply
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* --numstat does numeric diffstat, and doesn't actually apply
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* --index-info shows the old and new index info for paths if available.
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* --index updates the cache as well.
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* --cached updates only the cache without ever touching the working tree.
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*/
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static const char *prefix;
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static int prefix_length = -1;
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static int newfd = -1;
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static int unidiff_zero;
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static int p_value = 1;
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static int p_value_known;
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static int check_index;
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static int write_index;
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static int cached;
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static int diffstat;
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static int numstat;
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static int summary;
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static int check;
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static int apply = 1;
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static int apply_in_reverse;
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static int apply_with_reject;
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static int apply_verbosely;
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static int no_add;
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static int show_index_info;
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static int line_termination = '\n';
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static unsigned long p_context = ULONG_MAX;
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static const char apply_usage[] =
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"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--cached] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [--reverse] [--reject] [--verbose] [-z] [-pNUM] [-CNUM] [--whitespace=<nowarn|warn|error|error-all|strip>] <patch>...";
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static enum whitespace_eol {
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nowarn_whitespace,
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warn_on_whitespace,
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error_on_whitespace,
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strip_whitespace,
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} new_whitespace = warn_on_whitespace;
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static int whitespace_error;
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static int squelch_whitespace_errors = 5;
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static int applied_after_stripping;
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static const char *patch_input_file;
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static void parse_whitespace_option(const char *option)
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{
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if (!option) {
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new_whitespace = warn_on_whitespace;
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return;
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}
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if (!strcmp(option, "warn")) {
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new_whitespace = warn_on_whitespace;
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return;
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}
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if (!strcmp(option, "nowarn")) {
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new_whitespace = nowarn_whitespace;
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return;
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}
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if (!strcmp(option, "error")) {
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new_whitespace = error_on_whitespace;
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return;
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}
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if (!strcmp(option, "error-all")) {
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new_whitespace = error_on_whitespace;
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squelch_whitespace_errors = 0;
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return;
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}
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if (!strcmp(option, "strip")) {
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new_whitespace = strip_whitespace;
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return;
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}
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die("unrecognized whitespace option '%s'", option);
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}
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static void set_default_whitespace_mode(const char *whitespace_option)
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{
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if (!whitespace_option && !apply_default_whitespace) {
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new_whitespace = (apply
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? warn_on_whitespace
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: nowarn_whitespace);
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}
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}
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/*
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* For "diff-stat" like behaviour, we keep track of the biggest change
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* we've seen, and the longest filename. That allows us to do simple
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* scaling.
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*/
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static int max_change, max_len;
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/*
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* Various "current state", notably line numbers and what
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* file (and how) we're patching right now.. The "is_xxxx"
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* things are flags, where -1 means "don't know yet".
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*/
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static int linenr = 1;
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/*
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* This represents one "hunk" from a patch, starting with
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* "@@ -oldpos,oldlines +newpos,newlines @@" marker. The
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* patch text is pointed at by patch, and its byte length
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* is stored in size. leading and trailing are the number
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* of context lines.
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*/
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struct fragment {
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unsigned long leading, trailing;
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unsigned long oldpos, oldlines;
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unsigned long newpos, newlines;
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const char *patch;
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int size;
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int rejected;
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struct fragment *next;
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};
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/*
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* When dealing with a binary patch, we reuse "leading" field
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* to store the type of the binary hunk, either deflated "delta"
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* or deflated "literal".
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*/
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#define binary_patch_method leading
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#define BINARY_DELTA_DEFLATED 1
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#define BINARY_LITERAL_DEFLATED 2
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struct patch {
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char *new_name, *old_name, *def_name;
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unsigned int old_mode, new_mode;
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int is_new, is_delete; /* -1 = unknown, 0 = false, 1 = true */
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int rejected;
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unsigned long deflate_origlen;
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int lines_added, lines_deleted;
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int score;
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unsigned int is_toplevel_relative:1;
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unsigned int inaccurate_eof:1;
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unsigned int is_binary:1;
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unsigned int is_copy:1;
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unsigned int is_rename:1;
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struct fragment *fragments;
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char *result;
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unsigned long resultsize;
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char old_sha1_prefix[41];
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char new_sha1_prefix[41];
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struct patch *next;
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};
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static void say_patch_name(FILE *output, const char *pre, struct patch *patch, const char *post)
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{
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fputs(pre, output);
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if (patch->old_name && patch->new_name &&
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strcmp(patch->old_name, patch->new_name)) {
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write_name_quoted(NULL, 0, patch->old_name, 1, output);
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fputs(" => ", output);
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write_name_quoted(NULL, 0, patch->new_name, 1, output);
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}
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else {
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const char *n = patch->new_name;
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if (!n)
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n = patch->old_name;
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write_name_quoted(NULL, 0, n, 1, output);
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}
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fputs(post, output);
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}
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#define CHUNKSIZE (8192)
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#define SLOP (16)
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static void *read_patch_file(int fd, unsigned long *sizep)
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{
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unsigned long size = 0, alloc = CHUNKSIZE;
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void *buffer = xmalloc(alloc);
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for (;;) {
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int nr = alloc - size;
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if (nr < 1024) {
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alloc += CHUNKSIZE;
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buffer = xrealloc(buffer, alloc);
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nr = alloc - size;
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}
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nr = xread(fd, (char *) buffer + size, nr);
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if (!nr)
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break;
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if (nr < 0)
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die("git-apply: read returned %s", strerror(errno));
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size += nr;
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}
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*sizep = size;
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/*
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* Make sure that we have some slop in the buffer
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* so that we can do speculative "memcmp" etc, and
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* see to it that it is NUL-filled.
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*/
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if (alloc < size + SLOP)
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buffer = xrealloc(buffer, size + SLOP);
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memset((char *) buffer + size, 0, SLOP);
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return buffer;
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}
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static unsigned long linelen(const char *buffer, unsigned long size)
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{
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unsigned long len = 0;
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while (size--) {
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len++;
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if (*buffer++ == '\n')
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break;
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}
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return len;
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}
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static int is_dev_null(const char *str)
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{
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return !memcmp("/dev/null", str, 9) && isspace(str[9]);
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}
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#define TERM_SPACE 1
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#define TERM_TAB 2
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static int name_terminate(const char *name, int namelen, int c, int terminate)
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{
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if (c == ' ' && !(terminate & TERM_SPACE))
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return 0;
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if (c == '\t' && !(terminate & TERM_TAB))
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return 0;
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return 1;
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}
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static char *find_name(const char *line, char *def, int p_value, int terminate)
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{
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int len;
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const char *start = line;
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char *name;
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if (*line == '"') {
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/* Proposed "new-style" GNU patch/diff format; see
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* http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2
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*/
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name = unquote_c_style(line, NULL);
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if (name) {
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char *cp = name;
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while (p_value) {
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cp = strchr(name, '/');
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if (!cp)
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break;
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cp++;
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p_value--;
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}
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if (cp) {
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/* name can later be freed, so we need
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* to memmove, not just return cp
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*/
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memmove(name, cp, strlen(cp) + 1);
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free(def);
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return name;
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}
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else {
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free(name);
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name = NULL;
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}
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}
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}
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for (;;) {
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char c = *line;
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if (isspace(c)) {
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if (c == '\n')
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break;
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if (name_terminate(start, line-start, c, terminate))
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break;
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}
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line++;
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if (c == '/' && !--p_value)
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start = line;
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}
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if (!start)
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return def;
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len = line - start;
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if (!len)
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return def;
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/*
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* Generally we prefer the shorter name, especially
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* if the other one is just a variation of that with
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* something else tacked on to the end (ie "file.orig"
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* or "file~").
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*/
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if (def) {
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int deflen = strlen(def);
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if (deflen < len && !strncmp(start, def, deflen))
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return def;
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}
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name = xmalloc(len + 1);
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memcpy(name, start, len);
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name[len] = 0;
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free(def);
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return name;
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}
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static int count_slashes(const char *cp)
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{
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int cnt = 0;
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char ch;
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while ((ch = *cp++))
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if (ch == '/')
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cnt++;
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return cnt;
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}
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/*
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* Given the string after "--- " or "+++ ", guess the appropriate
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* p_value for the given patch.
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*/
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static int guess_p_value(const char *nameline)
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{
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char *name, *cp;
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int val = -1;
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if (is_dev_null(nameline))
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return -1;
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name = find_name(nameline, NULL, 0, TERM_SPACE | TERM_TAB);
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if (!name)
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return -1;
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cp = strchr(name, '/');
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if (!cp)
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val = 0;
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else if (prefix) {
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/*
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* Does it begin with "a/$our-prefix" and such? Then this is
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* very likely to apply to our directory.
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*/
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if (!strncmp(name, prefix, prefix_length))
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val = count_slashes(prefix);
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else {
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cp++;
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if (!strncmp(cp, prefix, prefix_length))
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val = count_slashes(prefix) + 1;
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}
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}
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free(name);
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return val;
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}
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/*
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* Get the name etc info from the --/+++ lines of a traditional patch header
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*
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* FIXME! The end-of-filename heuristics are kind of screwy. For existing
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* files, we can happily check the index for a match, but for creating a
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* new file we should try to match whatever "patch" does. I have no idea.
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*/
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static void parse_traditional_patch(const char *first, const char *second, struct patch *patch)
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{
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char *name;
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first += 4; /* skip "--- " */
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second += 4; /* skip "+++ " */
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if (!p_value_known) {
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int p, q;
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p = guess_p_value(first);
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q = guess_p_value(second);
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if (p < 0) p = q;
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if (0 <= p && p == q) {
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p_value = p;
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p_value_known = 1;
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}
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}
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if (is_dev_null(first)) {
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patch->is_new = 1;
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patch->is_delete = 0;
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name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB);
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patch->new_name = name;
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} else if (is_dev_null(second)) {
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patch->is_new = 0;
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patch->is_delete = 1;
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name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
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patch->old_name = name;
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} else {
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name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
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name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB);
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patch->old_name = patch->new_name = name;
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}
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if (!name)
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die("unable to find filename in patch at line %d", linenr);
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}
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static int gitdiff_hdrend(const char *line, struct patch *patch)
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{
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return -1;
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}
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/*
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* We're anal about diff header consistency, to make
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* sure that we don't end up having strange ambiguous
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* patches floating around.
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*
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* As a result, gitdiff_{old|new}name() will check
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* their names against any previous information, just
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* to make sure..
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*/
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static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
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{
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if (!orig_name && !isnull)
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return find_name(line, NULL, p_value, TERM_TAB);
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if (orig_name) {
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int len;
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const char *name;
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char *another;
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name = orig_name;
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len = strlen(name);
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if (isnull)
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die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
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another = find_name(line, NULL, p_value, TERM_TAB);
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if (!another || memcmp(another, name, len))
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die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
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free(another);
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return orig_name;
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}
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else {
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/* expect "/dev/null" */
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if (memcmp("/dev/null", line, 9) || line[9] != '\n')
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die("git-apply: bad git-diff - expected /dev/null on line %d", linenr);
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return NULL;
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}
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}
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static int gitdiff_oldname(const char *line, struct patch *patch)
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{
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patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old");
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return 0;
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}
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static int gitdiff_newname(const char *line, struct patch *patch)
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{
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patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new");
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return 0;
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}
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static int gitdiff_oldmode(const char *line, struct patch *patch)
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{
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patch->old_mode = strtoul(line, NULL, 8);
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return 0;
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}
|
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|
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static int gitdiff_newmode(const char *line, struct patch *patch)
|
|
{
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patch->new_mode = strtoul(line, NULL, 8);
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return 0;
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}
|
|
|
|
static int gitdiff_delete(const char *line, struct patch *patch)
|
|
{
|
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patch->is_delete = 1;
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patch->old_name = patch->def_name;
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return gitdiff_oldmode(line, patch);
|
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}
|
|
|
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static int gitdiff_newfile(const char *line, struct patch *patch)
|
|
{
|
|
patch->is_new = 1;
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patch->new_name = patch->def_name;
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return gitdiff_newmode(line, patch);
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|
}
|
|
|
|
static int gitdiff_copysrc(const char *line, struct patch *patch)
|
|
{
|
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patch->is_copy = 1;
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patch->old_name = find_name(line, NULL, 0, 0);
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return 0;
|
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}
|
|
|
|
static int gitdiff_copydst(const char *line, struct patch *patch)
|
|
{
|
|
patch->is_copy = 1;
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|
patch->new_name = find_name(line, NULL, 0, 0);
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return 0;
|
|
}
|
|
|
|
static int gitdiff_renamesrc(const char *line, struct patch *patch)
|
|
{
|
|
patch->is_rename = 1;
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patch->old_name = find_name(line, NULL, 0, 0);
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return 0;
|
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}
|
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|
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static int gitdiff_renamedst(const char *line, struct patch *patch)
|
|
{
|
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patch->is_rename = 1;
|
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patch->new_name = find_name(line, NULL, 0, 0);
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return 0;
|
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}
|
|
|
|
static int gitdiff_similarity(const char *line, struct patch *patch)
|
|
{
|
|
if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
|
|
patch->score = 0;
|
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return 0;
|
|
}
|
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|
|
static int gitdiff_dissimilarity(const char *line, struct patch *patch)
|
|
{
|
|
if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
|
|
patch->score = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int gitdiff_index(const char *line, struct patch *patch)
|
|
{
|
|
/* index line is N hexadecimal, "..", N hexadecimal,
|
|
* and optional space with octal mode.
|
|
*/
|
|
const char *ptr, *eol;
|
|
int len;
|
|
|
|
ptr = strchr(line, '.');
|
|
if (!ptr || ptr[1] != '.' || 40 < ptr - line)
|
|
return 0;
|
|
len = ptr - line;
|
|
memcpy(patch->old_sha1_prefix, line, len);
|
|
patch->old_sha1_prefix[len] = 0;
|
|
|
|
line = ptr + 2;
|
|
ptr = strchr(line, ' ');
|
|
eol = strchr(line, '\n');
|
|
|
|
if (!ptr || eol < ptr)
|
|
ptr = eol;
|
|
len = ptr - line;
|
|
|
|
if (40 < len)
|
|
return 0;
|
|
memcpy(patch->new_sha1_prefix, line, len);
|
|
patch->new_sha1_prefix[len] = 0;
|
|
if (*ptr == ' ')
|
|
patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This is normal for a diff that doesn't change anything: we'll fall through
|
|
* into the next diff. Tell the parser to break out.
|
|
*/
|
|
static int gitdiff_unrecognized(const char *line, struct patch *patch)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static const char *stop_at_slash(const char *line, int llen)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < llen; i++) {
|
|
int ch = line[i];
|
|
if (ch == '/')
|
|
return line + i;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* This is to extract the same name that appears on "diff --git"
|
|
* line. We do not find and return anything if it is a rename
|
|
* patch, and it is OK because we will find the name elsewhere.
|
|
* We need to reliably find name only when it is mode-change only,
|
|
* creation or deletion of an empty file. In any of these cases,
|
|
* both sides are the same name under a/ and b/ respectively.
|
|
*/
|
|
static char *git_header_name(char *line, int llen)
|
|
{
|
|
int len;
|
|
const char *name;
|
|
const char *second = NULL;
|
|
|
|
line += strlen("diff --git ");
|
|
llen -= strlen("diff --git ");
|
|
|
|
if (*line == '"') {
|
|
const char *cp;
|
|
char *first = unquote_c_style(line, &second);
|
|
if (!first)
|
|
return NULL;
|
|
|
|
/* advance to the first slash */
|
|
cp = stop_at_slash(first, strlen(first));
|
|
if (!cp || cp == first) {
|
|
/* we do not accept absolute paths */
|
|
free_first_and_fail:
|
|
free(first);
|
|
return NULL;
|
|
}
|
|
len = strlen(cp+1);
|
|
memmove(first, cp+1, len+1); /* including NUL */
|
|
|
|
/* second points at one past closing dq of name.
|
|
* find the second name.
|
|
*/
|
|
while ((second < line + llen) && isspace(*second))
|
|
second++;
|
|
|
|
if (line + llen <= second)
|
|
goto free_first_and_fail;
|
|
if (*second == '"') {
|
|
char *sp = unquote_c_style(second, NULL);
|
|
if (!sp)
|
|
goto free_first_and_fail;
|
|
cp = stop_at_slash(sp, strlen(sp));
|
|
if (!cp || cp == sp) {
|
|
free_both_and_fail:
|
|
free(sp);
|
|
goto free_first_and_fail;
|
|
}
|
|
/* They must match, otherwise ignore */
|
|
if (strcmp(cp+1, first))
|
|
goto free_both_and_fail;
|
|
free(sp);
|
|
return first;
|
|
}
|
|
|
|
/* unquoted second */
|
|
cp = stop_at_slash(second, line + llen - second);
|
|
if (!cp || cp == second)
|
|
goto free_first_and_fail;
|
|
cp++;
|
|
if (line + llen - cp != len + 1 ||
|
|
memcmp(first, cp, len))
|
|
goto free_first_and_fail;
|
|
return first;
|
|
}
|
|
|
|
/* unquoted first name */
|
|
name = stop_at_slash(line, llen);
|
|
if (!name || name == line)
|
|
return NULL;
|
|
|
|
name++;
|
|
|
|
/* since the first name is unquoted, a dq if exists must be
|
|
* the beginning of the second name.
|
|
*/
|
|
for (second = name; second < line + llen; second++) {
|
|
if (*second == '"') {
|
|
const char *cp = second;
|
|
const char *np;
|
|
char *sp = unquote_c_style(second, NULL);
|
|
|
|
if (!sp)
|
|
return NULL;
|
|
np = stop_at_slash(sp, strlen(sp));
|
|
if (!np || np == sp) {
|
|
free_second_and_fail:
|
|
free(sp);
|
|
return NULL;
|
|
}
|
|
np++;
|
|
len = strlen(np);
|
|
if (len < cp - name &&
|
|
!strncmp(np, name, len) &&
|
|
isspace(name[len])) {
|
|
/* Good */
|
|
memmove(sp, np, len + 1);
|
|
return sp;
|
|
}
|
|
goto free_second_and_fail;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Accept a name only if it shows up twice, exactly the same
|
|
* form.
|
|
*/
|
|
for (len = 0 ; ; len++) {
|
|
switch (name[len]) {
|
|
default:
|
|
continue;
|
|
case '\n':
|
|
return NULL;
|
|
case '\t': case ' ':
|
|
second = name+len;
|
|
for (;;) {
|
|
char c = *second++;
|
|
if (c == '\n')
|
|
return NULL;
|
|
if (c == '/')
|
|
break;
|
|
}
|
|
if (second[len] == '\n' && !memcmp(name, second, len)) {
|
|
char *ret = xmalloc(len + 1);
|
|
memcpy(ret, name, len);
|
|
ret[len] = 0;
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Verify that we recognize the lines following a git header */
|
|
static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch)
|
|
{
|
|
unsigned long offset;
|
|
|
|
/* A git diff has explicit new/delete information, so we don't guess */
|
|
patch->is_new = 0;
|
|
patch->is_delete = 0;
|
|
|
|
/*
|
|
* Some things may not have the old name in the
|
|
* rest of the headers anywhere (pure mode changes,
|
|
* or removing or adding empty files), so we get
|
|
* the default name from the header.
|
|
*/
|
|
patch->def_name = git_header_name(line, len);
|
|
|
|
line += len;
|
|
size -= len;
|
|
linenr++;
|
|
for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) {
|
|
static const struct opentry {
|
|
const char *str;
|
|
int (*fn)(const char *, struct patch *);
|
|
} optable[] = {
|
|
{ "@@ -", gitdiff_hdrend },
|
|
{ "--- ", gitdiff_oldname },
|
|
{ "+++ ", gitdiff_newname },
|
|
{ "old mode ", gitdiff_oldmode },
|
|
{ "new mode ", gitdiff_newmode },
|
|
{ "deleted file mode ", gitdiff_delete },
|
|
{ "new file mode ", gitdiff_newfile },
|
|
{ "copy from ", gitdiff_copysrc },
|
|
{ "copy to ", gitdiff_copydst },
|
|
{ "rename old ", gitdiff_renamesrc },
|
|
{ "rename new ", gitdiff_renamedst },
|
|
{ "rename from ", gitdiff_renamesrc },
|
|
{ "rename to ", gitdiff_renamedst },
|
|
{ "similarity index ", gitdiff_similarity },
|
|
{ "dissimilarity index ", gitdiff_dissimilarity },
|
|
{ "index ", gitdiff_index },
|
|
{ "", gitdiff_unrecognized },
|
|
};
|
|
int i;
|
|
|
|
len = linelen(line, size);
|
|
if (!len || line[len-1] != '\n')
|
|
break;
|
|
for (i = 0; i < ARRAY_SIZE(optable); i++) {
|
|
const struct opentry *p = optable + i;
|
|
int oplen = strlen(p->str);
|
|
if (len < oplen || memcmp(p->str, line, oplen))
|
|
continue;
|
|
if (p->fn(line + oplen, patch) < 0)
|
|
return offset;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int parse_num(const char *line, unsigned long *p)
|
|
{
|
|
char *ptr;
|
|
|
|
if (!isdigit(*line))
|
|
return 0;
|
|
*p = strtoul(line, &ptr, 10);
|
|
return ptr - line;
|
|
}
|
|
|
|
static int parse_range(const char *line, int len, int offset, const char *expect,
|
|
unsigned long *p1, unsigned long *p2)
|
|
{
|
|
int digits, ex;
|
|
|
|
if (offset < 0 || offset >= len)
|
|
return -1;
|
|
line += offset;
|
|
len -= offset;
|
|
|
|
digits = parse_num(line, p1);
|
|
if (!digits)
|
|
return -1;
|
|
|
|
offset += digits;
|
|
line += digits;
|
|
len -= digits;
|
|
|
|
*p2 = 1;
|
|
if (*line == ',') {
|
|
digits = parse_num(line+1, p2);
|
|
if (!digits)
|
|
return -1;
|
|
|
|
offset += digits+1;
|
|
line += digits+1;
|
|
len -= digits+1;
|
|
}
|
|
|
|
ex = strlen(expect);
|
|
if (ex > len)
|
|
return -1;
|
|
if (memcmp(line, expect, ex))
|
|
return -1;
|
|
|
|
return offset + ex;
|
|
}
|
|
|
|
/*
|
|
* Parse a unified diff fragment header of the
|
|
* form "@@ -a,b +c,d @@"
|
|
*/
|
|
static int parse_fragment_header(char *line, int len, struct fragment *fragment)
|
|
{
|
|
int offset;
|
|
|
|
if (!len || line[len-1] != '\n')
|
|
return -1;
|
|
|
|
/* Figure out the number of lines in a fragment */
|
|
offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
|
|
offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch)
|
|
{
|
|
unsigned long offset, len;
|
|
|
|
patch->is_toplevel_relative = 0;
|
|
patch->is_rename = patch->is_copy = 0;
|
|
patch->is_new = patch->is_delete = -1;
|
|
patch->old_mode = patch->new_mode = 0;
|
|
patch->old_name = patch->new_name = NULL;
|
|
for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) {
|
|
unsigned long nextlen;
|
|
|
|
len = linelen(line, size);
|
|
if (!len)
|
|
break;
|
|
|
|
/* Testing this early allows us to take a few shortcuts.. */
|
|
if (len < 6)
|
|
continue;
|
|
|
|
/*
|
|
* Make sure we don't find any unconnected patch fragments.
|
|
* That's a sign that we didn't find a header, and that a
|
|
* patch has become corrupted/broken up.
|
|
*/
|
|
if (!memcmp("@@ -", line, 4)) {
|
|
struct fragment dummy;
|
|
if (parse_fragment_header(line, len, &dummy) < 0)
|
|
continue;
|
|
die("patch fragment without header at line %d: %.*s",
|
|
linenr, (int)len-1, line);
|
|
}
|
|
|
|
if (size < len + 6)
|
|
break;
|
|
|
|
/*
|
|
* Git patch? It might not have a real patch, just a rename
|
|
* or mode change, so we handle that specially
|
|
*/
|
|
if (!memcmp("diff --git ", line, 11)) {
|
|
int git_hdr_len = parse_git_header(line, len, size, patch);
|
|
if (git_hdr_len <= len)
|
|
continue;
|
|
if (!patch->old_name && !patch->new_name) {
|
|
if (!patch->def_name)
|
|
die("git diff header lacks filename information (line %d)", linenr);
|
|
patch->old_name = patch->new_name = patch->def_name;
|
|
}
|
|
patch->is_toplevel_relative = 1;
|
|
*hdrsize = git_hdr_len;
|
|
return offset;
|
|
}
|
|
|
|
/** --- followed by +++ ? */
|
|
if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
|
|
continue;
|
|
|
|
/*
|
|
* We only accept unified patches, so we want it to
|
|
* at least have "@@ -a,b +c,d @@\n", which is 14 chars
|
|
* minimum
|
|
*/
|
|
nextlen = linelen(line + len, size - len);
|
|
if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
|
|
continue;
|
|
|
|
/* Ok, we'll consider it a patch */
|
|
parse_traditional_patch(line, line+len, patch);
|
|
*hdrsize = len + nextlen;
|
|
linenr += 2;
|
|
return offset;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void check_whitespace(const char *line, int len)
|
|
{
|
|
const char *err = "Adds trailing whitespace";
|
|
int seen_space = 0;
|
|
int i;
|
|
|
|
/*
|
|
* We know len is at least two, since we have a '+' and we
|
|
* checked that the last character was a '\n' before calling
|
|
* this function. That is, an addition of an empty line would
|
|
* check the '+' here. Sneaky...
|
|
*/
|
|
if (isspace(line[len-2]))
|
|
goto error;
|
|
|
|
/*
|
|
* Make sure that there is no space followed by a tab in
|
|
* indentation.
|
|
*/
|
|
err = "Space in indent is followed by a tab";
|
|
for (i = 1; i < len; i++) {
|
|
if (line[i] == '\t') {
|
|
if (seen_space)
|
|
goto error;
|
|
}
|
|
else if (line[i] == ' ')
|
|
seen_space = 1;
|
|
else
|
|
break;
|
|
}
|
|
return;
|
|
|
|
error:
|
|
whitespace_error++;
|
|
if (squelch_whitespace_errors &&
|
|
squelch_whitespace_errors < whitespace_error)
|
|
;
|
|
else
|
|
fprintf(stderr, "%s.\n%s:%d:%.*s\n",
|
|
err, patch_input_file, linenr, len-2, line+1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Parse a unified diff. Note that this really needs to parse each
|
|
* fragment separately, since the only way to know the difference
|
|
* between a "---" that is part of a patch, and a "---" that starts
|
|
* the next patch is to look at the line counts..
|
|
*/
|
|
static int parse_fragment(char *line, unsigned long size, struct patch *patch, struct fragment *fragment)
|
|
{
|
|
int added, deleted;
|
|
int len = linelen(line, size), offset;
|
|
unsigned long oldlines, newlines;
|
|
unsigned long leading, trailing;
|
|
|
|
offset = parse_fragment_header(line, len, fragment);
|
|
if (offset < 0)
|
|
return -1;
|
|
oldlines = fragment->oldlines;
|
|
newlines = fragment->newlines;
|
|
leading = 0;
|
|
trailing = 0;
|
|
|
|
/* Parse the thing.. */
|
|
line += len;
|
|
size -= len;
|
|
linenr++;
|
|
added = deleted = 0;
|
|
for (offset = len;
|
|
0 < size;
|
|
offset += len, size -= len, line += len, linenr++) {
|
|
if (!oldlines && !newlines)
|
|
break;
|
|
len = linelen(line, size);
|
|
if (!len || line[len-1] != '\n')
|
|
return -1;
|
|
switch (*line) {
|
|
default:
|
|
return -1;
|
|
case '\n': /* newer GNU diff, an empty context line */
|
|
case ' ':
|
|
oldlines--;
|
|
newlines--;
|
|
if (!deleted && !added)
|
|
leading++;
|
|
trailing++;
|
|
break;
|
|
case '-':
|
|
deleted++;
|
|
oldlines--;
|
|
trailing = 0;
|
|
break;
|
|
case '+':
|
|
if (new_whitespace != nowarn_whitespace)
|
|
check_whitespace(line, len);
|
|
added++;
|
|
newlines--;
|
|
trailing = 0;
|
|
break;
|
|
|
|
/* We allow "\ No newline at end of file". Depending
|
|
* on locale settings when the patch was produced we
|
|
* don't know what this line looks like. The only
|
|
* thing we do know is that it begins with "\ ".
|
|
* Checking for 12 is just for sanity check -- any
|
|
* l10n of "\ No newline..." is at least that long.
|
|
*/
|
|
case '\\':
|
|
if (len < 12 || memcmp(line, "\\ ", 2))
|
|
return -1;
|
|
break;
|
|
}
|
|
}
|
|
if (oldlines || newlines)
|
|
return -1;
|
|
fragment->leading = leading;
|
|
fragment->trailing = trailing;
|
|
|
|
/* If a fragment ends with an incomplete line, we failed to include
|
|
* it in the above loop because we hit oldlines == newlines == 0
|
|
* before seeing it.
|
|
*/
|
|
if (12 < size && !memcmp(line, "\\ ", 2))
|
|
offset += linelen(line, size);
|
|
|
|
patch->lines_added += added;
|
|
patch->lines_deleted += deleted;
|
|
|
|
if (0 < patch->is_new && oldlines)
|
|
return error("new file depends on old contents");
|
|
if (0 < patch->is_delete && newlines)
|
|
return error("deleted file still has contents");
|
|
return offset;
|
|
}
|
|
|
|
static int parse_single_patch(char *line, unsigned long size, struct patch *patch)
|
|
{
|
|
unsigned long offset = 0;
|
|
unsigned long oldlines = 0, newlines = 0, context = 0;
|
|
struct fragment **fragp = &patch->fragments;
|
|
|
|
while (size > 4 && !memcmp(line, "@@ -", 4)) {
|
|
struct fragment *fragment;
|
|
int len;
|
|
|
|
fragment = xcalloc(1, sizeof(*fragment));
|
|
len = parse_fragment(line, size, patch, fragment);
|
|
if (len <= 0)
|
|
die("corrupt patch at line %d", linenr);
|
|
fragment->patch = line;
|
|
fragment->size = len;
|
|
oldlines += fragment->oldlines;
|
|
newlines += fragment->newlines;
|
|
context += fragment->leading + fragment->trailing;
|
|
|
|
*fragp = fragment;
|
|
fragp = &fragment->next;
|
|
|
|
offset += len;
|
|
line += len;
|
|
size -= len;
|
|
}
|
|
|
|
/*
|
|
* If something was removed (i.e. we have old-lines) it cannot
|
|
* be creation, and if something was added it cannot be
|
|
* deletion. However, the reverse is not true; --unified=0
|
|
* patches that only add are not necessarily creation even
|
|
* though they do not have any old lines, and ones that only
|
|
* delete are not necessarily deletion.
|
|
*
|
|
* Unfortunately, a real creation/deletion patch do _not_ have
|
|
* any context line by definition, so we cannot safely tell it
|
|
* apart with --unified=0 insanity. At least if the patch has
|
|
* more than one hunk it is not creation or deletion.
|
|
*/
|
|
if (patch->is_new < 0 &&
|
|
(oldlines || (patch->fragments && patch->fragments->next)))
|
|
patch->is_new = 0;
|
|
if (patch->is_delete < 0 &&
|
|
(newlines || (patch->fragments && patch->fragments->next)))
|
|
patch->is_delete = 0;
|
|
if (!unidiff_zero || context) {
|
|
/* If the user says the patch is not generated with
|
|
* --unified=0, or if we have seen context lines,
|
|
* then not having oldlines means the patch is creation,
|
|
* and not having newlines means the patch is deletion.
|
|
*/
|
|
if (patch->is_new < 0 && !oldlines) {
|
|
patch->is_new = 1;
|
|
patch->old_name = NULL;
|
|
}
|
|
if (patch->is_delete < 0 && !newlines) {
|
|
patch->is_delete = 1;
|
|
patch->new_name = NULL;
|
|
}
|
|
}
|
|
|
|
if (0 < patch->is_new && oldlines)
|
|
die("new file %s depends on old contents", patch->new_name);
|
|
if (0 < patch->is_delete && newlines)
|
|
die("deleted file %s still has contents", patch->old_name);
|
|
if (!patch->is_delete && !newlines && context)
|
|
fprintf(stderr, "** warning: file %s becomes empty but "
|
|
"is not deleted\n", patch->new_name);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static inline int metadata_changes(struct patch *patch)
|
|
{
|
|
return patch->is_rename > 0 ||
|
|
patch->is_copy > 0 ||
|
|
patch->is_new > 0 ||
|
|
patch->is_delete ||
|
|
(patch->old_mode && patch->new_mode &&
|
|
patch->old_mode != patch->new_mode);
|
|
}
|
|
|
|
static char *inflate_it(const void *data, unsigned long size,
|
|
unsigned long inflated_size)
|
|
{
|
|
z_stream stream;
|
|
void *out;
|
|
int st;
|
|
|
|
memset(&stream, 0, sizeof(stream));
|
|
|
|
stream.next_in = (unsigned char *)data;
|
|
stream.avail_in = size;
|
|
stream.next_out = out = xmalloc(inflated_size);
|
|
stream.avail_out = inflated_size;
|
|
inflateInit(&stream);
|
|
st = inflate(&stream, Z_FINISH);
|
|
if ((st != Z_STREAM_END) || stream.total_out != inflated_size) {
|
|
free(out);
|
|
return NULL;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
static struct fragment *parse_binary_hunk(char **buf_p,
|
|
unsigned long *sz_p,
|
|
int *status_p,
|
|
int *used_p)
|
|
{
|
|
/* Expect a line that begins with binary patch method ("literal"
|
|
* or "delta"), followed by the length of data before deflating.
|
|
* a sequence of 'length-byte' followed by base-85 encoded data
|
|
* should follow, terminated by a newline.
|
|
*
|
|
* Each 5-byte sequence of base-85 encodes up to 4 bytes,
|
|
* and we would limit the patch line to 66 characters,
|
|
* so one line can fit up to 13 groups that would decode
|
|
* to 52 bytes max. The length byte 'A'-'Z' corresponds
|
|
* to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes.
|
|
*/
|
|
int llen, used;
|
|
unsigned long size = *sz_p;
|
|
char *buffer = *buf_p;
|
|
int patch_method;
|
|
unsigned long origlen;
|
|
char *data = NULL;
|
|
int hunk_size = 0;
|
|
struct fragment *frag;
|
|
|
|
llen = linelen(buffer, size);
|
|
used = llen;
|
|
|
|
*status_p = 0;
|
|
|
|
if (!prefixcmp(buffer, "delta ")) {
|
|
patch_method = BINARY_DELTA_DEFLATED;
|
|
origlen = strtoul(buffer + 6, NULL, 10);
|
|
}
|
|
else if (!prefixcmp(buffer, "literal ")) {
|
|
patch_method = BINARY_LITERAL_DEFLATED;
|
|
origlen = strtoul(buffer + 8, NULL, 10);
|
|
}
|
|
else
|
|
return NULL;
|
|
|
|
linenr++;
|
|
buffer += llen;
|
|
while (1) {
|
|
int byte_length, max_byte_length, newsize;
|
|
llen = linelen(buffer, size);
|
|
used += llen;
|
|
linenr++;
|
|
if (llen == 1) {
|
|
/* consume the blank line */
|
|
buffer++;
|
|
size--;
|
|
break;
|
|
}
|
|
/* Minimum line is "A00000\n" which is 7-byte long,
|
|
* and the line length must be multiple of 5 plus 2.
|
|
*/
|
|
if ((llen < 7) || (llen-2) % 5)
|
|
goto corrupt;
|
|
max_byte_length = (llen - 2) / 5 * 4;
|
|
byte_length = *buffer;
|
|
if ('A' <= byte_length && byte_length <= 'Z')
|
|
byte_length = byte_length - 'A' + 1;
|
|
else if ('a' <= byte_length && byte_length <= 'z')
|
|
byte_length = byte_length - 'a' + 27;
|
|
else
|
|
goto corrupt;
|
|
/* if the input length was not multiple of 4, we would
|
|
* have filler at the end but the filler should never
|
|
* exceed 3 bytes
|
|
*/
|
|
if (max_byte_length < byte_length ||
|
|
byte_length <= max_byte_length - 4)
|
|
goto corrupt;
|
|
newsize = hunk_size + byte_length;
|
|
data = xrealloc(data, newsize);
|
|
if (decode_85(data + hunk_size, buffer + 1, byte_length))
|
|
goto corrupt;
|
|
hunk_size = newsize;
|
|
buffer += llen;
|
|
size -= llen;
|
|
}
|
|
|
|
frag = xcalloc(1, sizeof(*frag));
|
|
frag->patch = inflate_it(data, hunk_size, origlen);
|
|
if (!frag->patch)
|
|
goto corrupt;
|
|
free(data);
|
|
frag->size = origlen;
|
|
*buf_p = buffer;
|
|
*sz_p = size;
|
|
*used_p = used;
|
|
frag->binary_patch_method = patch_method;
|
|
return frag;
|
|
|
|
corrupt:
|
|
free(data);
|
|
*status_p = -1;
|
|
error("corrupt binary patch at line %d: %.*s",
|
|
linenr-1, llen-1, buffer);
|
|
return NULL;
|
|
}
|
|
|
|
static int parse_binary(char *buffer, unsigned long size, struct patch *patch)
|
|
{
|
|
/* We have read "GIT binary patch\n"; what follows is a line
|
|
* that says the patch method (currently, either "literal" or
|
|
* "delta") and the length of data before deflating; a
|
|
* sequence of 'length-byte' followed by base-85 encoded data
|
|
* follows.
|
|
*
|
|
* When a binary patch is reversible, there is another binary
|
|
* hunk in the same format, starting with patch method (either
|
|
* "literal" or "delta") with the length of data, and a sequence
|
|
* of length-byte + base-85 encoded data, terminated with another
|
|
* empty line. This data, when applied to the postimage, produces
|
|
* the preimage.
|
|
*/
|
|
struct fragment *forward;
|
|
struct fragment *reverse;
|
|
int status;
|
|
int used, used_1;
|
|
|
|
forward = parse_binary_hunk(&buffer, &size, &status, &used);
|
|
if (!forward && !status)
|
|
/* there has to be one hunk (forward hunk) */
|
|
return error("unrecognized binary patch at line %d", linenr-1);
|
|
if (status)
|
|
/* otherwise we already gave an error message */
|
|
return status;
|
|
|
|
reverse = parse_binary_hunk(&buffer, &size, &status, &used_1);
|
|
if (reverse)
|
|
used += used_1;
|
|
else if (status) {
|
|
/* not having reverse hunk is not an error, but having
|
|
* a corrupt reverse hunk is.
|
|
*/
|
|
free((void*) forward->patch);
|
|
free(forward);
|
|
return status;
|
|
}
|
|
forward->next = reverse;
|
|
patch->fragments = forward;
|
|
patch->is_binary = 1;
|
|
return used;
|
|
}
|
|
|
|
static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
|
|
{
|
|
int hdrsize, patchsize;
|
|
int offset = find_header(buffer, size, &hdrsize, patch);
|
|
|
|
if (offset < 0)
|
|
return offset;
|
|
|
|
patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch);
|
|
|
|
if (!patchsize) {
|
|
static const char *binhdr[] = {
|
|
"Binary files ",
|
|
"Files ",
|
|
NULL,
|
|
};
|
|
static const char git_binary[] = "GIT binary patch\n";
|
|
int i;
|
|
int hd = hdrsize + offset;
|
|
unsigned long llen = linelen(buffer + hd, size - hd);
|
|
|
|
if (llen == sizeof(git_binary) - 1 &&
|
|
!memcmp(git_binary, buffer + hd, llen)) {
|
|
int used;
|
|
linenr++;
|
|
used = parse_binary(buffer + hd + llen,
|
|
size - hd - llen, patch);
|
|
if (used)
|
|
patchsize = used + llen;
|
|
else
|
|
patchsize = 0;
|
|
}
|
|
else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) {
|
|
for (i = 0; binhdr[i]; i++) {
|
|
int len = strlen(binhdr[i]);
|
|
if (len < size - hd &&
|
|
!memcmp(binhdr[i], buffer + hd, len)) {
|
|
linenr++;
|
|
patch->is_binary = 1;
|
|
patchsize = llen;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Empty patch cannot be applied if it is a text patch
|
|
* without metadata change. A binary patch appears
|
|
* empty to us here.
|
|
*/
|
|
if ((apply || check) &&
|
|
(!patch->is_binary && !metadata_changes(patch)))
|
|
die("patch with only garbage at line %d", linenr);
|
|
}
|
|
|
|
return offset + hdrsize + patchsize;
|
|
}
|
|
|
|
#define swap(a,b) myswap((a),(b),sizeof(a))
|
|
|
|
#define myswap(a, b, size) do { \
|
|
unsigned char mytmp[size]; \
|
|
memcpy(mytmp, &a, size); \
|
|
memcpy(&a, &b, size); \
|
|
memcpy(&b, mytmp, size); \
|
|
} while (0)
|
|
|
|
static void reverse_patches(struct patch *p)
|
|
{
|
|
for (; p; p = p->next) {
|
|
struct fragment *frag = p->fragments;
|
|
|
|
swap(p->new_name, p->old_name);
|
|
swap(p->new_mode, p->old_mode);
|
|
swap(p->is_new, p->is_delete);
|
|
swap(p->lines_added, p->lines_deleted);
|
|
swap(p->old_sha1_prefix, p->new_sha1_prefix);
|
|
|
|
for (; frag; frag = frag->next) {
|
|
swap(frag->newpos, frag->oldpos);
|
|
swap(frag->newlines, frag->oldlines);
|
|
}
|
|
}
|
|
}
|
|
|
|
static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
|
|
static const char minuses[]= "----------------------------------------------------------------------";
|
|
|
|
static void show_stats(struct patch *patch)
|
|
{
|
|
const char *prefix = "";
|
|
char *name = patch->new_name;
|
|
char *qname = NULL;
|
|
int len, max, add, del, total;
|
|
|
|
if (!name)
|
|
name = patch->old_name;
|
|
|
|
if (0 < (len = quote_c_style(name, NULL, NULL, 0))) {
|
|
qname = xmalloc(len + 1);
|
|
quote_c_style(name, qname, NULL, 0);
|
|
name = qname;
|
|
}
|
|
|
|
/*
|
|
* "scale" the filename
|
|
*/
|
|
len = strlen(name);
|
|
max = max_len;
|
|
if (max > 50)
|
|
max = 50;
|
|
if (len > max) {
|
|
char *slash;
|
|
prefix = "...";
|
|
max -= 3;
|
|
name += len - max;
|
|
slash = strchr(name, '/');
|
|
if (slash)
|
|
name = slash;
|
|
}
|
|
len = max;
|
|
|
|
/*
|
|
* scale the add/delete
|
|
*/
|
|
max = max_change;
|
|
if (max + len > 70)
|
|
max = 70 - len;
|
|
|
|
add = patch->lines_added;
|
|
del = patch->lines_deleted;
|
|
total = add + del;
|
|
|
|
if (max_change > 0) {
|
|
total = (total * max + max_change / 2) / max_change;
|
|
add = (add * max + max_change / 2) / max_change;
|
|
del = total - add;
|
|
}
|
|
if (patch->is_binary)
|
|
printf(" %s%-*s | Bin\n", prefix, len, name);
|
|
else
|
|
printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
|
|
len, name, patch->lines_added + patch->lines_deleted,
|
|
add, pluses, del, minuses);
|
|
free(qname);
|
|
}
|
|
|
|
static int read_old_data(struct stat *st, const char *path, char **buf_p, unsigned long *alloc_p, unsigned long *size_p)
|
|
{
|
|
int fd;
|
|
unsigned long got;
|
|
unsigned long nsize;
|
|
char *nbuf;
|
|
unsigned long size = *size_p;
|
|
char *buf = *buf_p;
|
|
|
|
switch (st->st_mode & S_IFMT) {
|
|
case S_IFLNK:
|
|
return readlink(path, buf, size) != size;
|
|
case S_IFREG:
|
|
fd = open(path, O_RDONLY);
|
|
if (fd < 0)
|
|
return error("unable to open %s", path);
|
|
got = 0;
|
|
for (;;) {
|
|
int ret = xread(fd, buf + got, size - got);
|
|
if (ret <= 0)
|
|
break;
|
|
got += ret;
|
|
}
|
|
close(fd);
|
|
nsize = got;
|
|
nbuf = buf;
|
|
if (convert_to_git(path, &nbuf, &nsize)) {
|
|
free(buf);
|
|
*buf_p = nbuf;
|
|
*alloc_p = nsize;
|
|
*size_p = nsize;
|
|
}
|
|
return got != size;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int find_offset(const char *buf, unsigned long size, const char *fragment, unsigned long fragsize, int line, int *lines)
|
|
{
|
|
int i;
|
|
unsigned long start, backwards, forwards;
|
|
|
|
if (fragsize > size)
|
|
return -1;
|
|
|
|
start = 0;
|
|
if (line > 1) {
|
|
unsigned long offset = 0;
|
|
i = line-1;
|
|
while (offset + fragsize <= size) {
|
|
if (buf[offset++] == '\n') {
|
|
start = offset;
|
|
if (!--i)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Exact line number? */
|
|
if (!memcmp(buf + start, fragment, fragsize))
|
|
return start;
|
|
|
|
/*
|
|
* There's probably some smart way to do this, but I'll leave
|
|
* that to the smart and beautiful people. I'm simple and stupid.
|
|
*/
|
|
backwards = start;
|
|
forwards = start;
|
|
for (i = 0; ; i++) {
|
|
unsigned long try;
|
|
int n;
|
|
|
|
/* "backward" */
|
|
if (i & 1) {
|
|
if (!backwards) {
|
|
if (forwards + fragsize > size)
|
|
break;
|
|
continue;
|
|
}
|
|
do {
|
|
--backwards;
|
|
} while (backwards && buf[backwards-1] != '\n');
|
|
try = backwards;
|
|
} else {
|
|
while (forwards + fragsize <= size) {
|
|
if (buf[forwards++] == '\n')
|
|
break;
|
|
}
|
|
try = forwards;
|
|
}
|
|
|
|
if (try + fragsize > size)
|
|
continue;
|
|
if (memcmp(buf + try, fragment, fragsize))
|
|
continue;
|
|
n = (i >> 1)+1;
|
|
if (i & 1)
|
|
n = -n;
|
|
*lines = n;
|
|
return try;
|
|
}
|
|
|
|
/*
|
|
* We should start searching forward and backward.
|
|
*/
|
|
return -1;
|
|
}
|
|
|
|
static void remove_first_line(const char **rbuf, int *rsize)
|
|
{
|
|
const char *buf = *rbuf;
|
|
int size = *rsize;
|
|
unsigned long offset;
|
|
offset = 0;
|
|
while (offset <= size) {
|
|
if (buf[offset++] == '\n')
|
|
break;
|
|
}
|
|
*rsize = size - offset;
|
|
*rbuf = buf + offset;
|
|
}
|
|
|
|
static void remove_last_line(const char **rbuf, int *rsize)
|
|
{
|
|
const char *buf = *rbuf;
|
|
int size = *rsize;
|
|
unsigned long offset;
|
|
offset = size - 1;
|
|
while (offset > 0) {
|
|
if (buf[--offset] == '\n')
|
|
break;
|
|
}
|
|
*rsize = offset + 1;
|
|
}
|
|
|
|
struct buffer_desc {
|
|
char *buffer;
|
|
unsigned long size;
|
|
unsigned long alloc;
|
|
};
|
|
|
|
static int apply_line(char *output, const char *patch, int plen)
|
|
{
|
|
/* plen is number of bytes to be copied from patch,
|
|
* starting at patch+1 (patch[0] is '+'). Typically
|
|
* patch[plen] is '\n', unless this is the incomplete
|
|
* last line.
|
|
*/
|
|
int i;
|
|
int add_nl_to_tail = 0;
|
|
int fixed = 0;
|
|
int last_tab_in_indent = -1;
|
|
int last_space_in_indent = -1;
|
|
int need_fix_leading_space = 0;
|
|
char *buf;
|
|
|
|
if ((new_whitespace != strip_whitespace) || !whitespace_error ||
|
|
*patch != '+') {
|
|
memcpy(output, patch + 1, plen);
|
|
return plen;
|
|
}
|
|
|
|
if (1 < plen && isspace(patch[plen-1])) {
|
|
if (patch[plen] == '\n')
|
|
add_nl_to_tail = 1;
|
|
plen--;
|
|
while (0 < plen && isspace(patch[plen]))
|
|
plen--;
|
|
fixed = 1;
|
|
}
|
|
|
|
for (i = 1; i < plen; i++) {
|
|
char ch = patch[i];
|
|
if (ch == '\t') {
|
|
last_tab_in_indent = i;
|
|
if (0 <= last_space_in_indent)
|
|
need_fix_leading_space = 1;
|
|
}
|
|
else if (ch == ' ')
|
|
last_space_in_indent = i;
|
|
else
|
|
break;
|
|
}
|
|
|
|
buf = output;
|
|
if (need_fix_leading_space) {
|
|
/* between patch[1..last_tab_in_indent] strip the
|
|
* funny spaces, updating them to tab as needed.
|
|
*/
|
|
for (i = 1; i < last_tab_in_indent; i++, plen--) {
|
|
char ch = patch[i];
|
|
if (ch != ' ')
|
|
*output++ = ch;
|
|
else if ((i % 8) == 0)
|
|
*output++ = '\t';
|
|
}
|
|
fixed = 1;
|
|
i = last_tab_in_indent;
|
|
}
|
|
else
|
|
i = 1;
|
|
|
|
memcpy(output, patch + i, plen);
|
|
if (add_nl_to_tail)
|
|
output[plen++] = '\n';
|
|
if (fixed)
|
|
applied_after_stripping++;
|
|
return output + plen - buf;
|
|
}
|
|
|
|
static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag, int inaccurate_eof)
|
|
{
|
|
int match_beginning, match_end;
|
|
char *buf = desc->buffer;
|
|
const char *patch = frag->patch;
|
|
int offset, size = frag->size;
|
|
char *old = xmalloc(size);
|
|
char *new = xmalloc(size);
|
|
const char *oldlines, *newlines;
|
|
int oldsize = 0, newsize = 0;
|
|
unsigned long leading, trailing;
|
|
int pos, lines;
|
|
|
|
while (size > 0) {
|
|
char first;
|
|
int len = linelen(patch, size);
|
|
int plen;
|
|
|
|
if (!len)
|
|
break;
|
|
|
|
/*
|
|
* "plen" is how much of the line we should use for
|
|
* the actual patch data. Normally we just remove the
|
|
* first character on the line, but if the line is
|
|
* followed by "\ No newline", then we also remove the
|
|
* last one (which is the newline, of course).
|
|
*/
|
|
plen = len-1;
|
|
if (len < size && patch[len] == '\\')
|
|
plen--;
|
|
first = *patch;
|
|
if (apply_in_reverse) {
|
|
if (first == '-')
|
|
first = '+';
|
|
else if (first == '+')
|
|
first = '-';
|
|
}
|
|
switch (first) {
|
|
case '\n':
|
|
/* Newer GNU diff, empty context line */
|
|
if (plen < 0)
|
|
/* ... followed by '\No newline'; nothing */
|
|
break;
|
|
old[oldsize++] = '\n';
|
|
new[newsize++] = '\n';
|
|
break;
|
|
case ' ':
|
|
case '-':
|
|
memcpy(old + oldsize, patch + 1, plen);
|
|
oldsize += plen;
|
|
if (first == '-')
|
|
break;
|
|
/* Fall-through for ' ' */
|
|
case '+':
|
|
if (first != '+' || !no_add)
|
|
newsize += apply_line(new + newsize, patch,
|
|
plen);
|
|
break;
|
|
case '@': case '\\':
|
|
/* Ignore it, we already handled it */
|
|
break;
|
|
default:
|
|
if (apply_verbosely)
|
|
error("invalid start of line: '%c'", first);
|
|
return -1;
|
|
}
|
|
patch += len;
|
|
size -= len;
|
|
}
|
|
|
|
if (inaccurate_eof && oldsize > 0 && old[oldsize - 1] == '\n' &&
|
|
newsize > 0 && new[newsize - 1] == '\n') {
|
|
oldsize--;
|
|
newsize--;
|
|
}
|
|
|
|
oldlines = old;
|
|
newlines = new;
|
|
leading = frag->leading;
|
|
trailing = frag->trailing;
|
|
|
|
/*
|
|
* If we don't have any leading/trailing data in the patch,
|
|
* we want it to match at the beginning/end of the file.
|
|
*
|
|
* But that would break if the patch is generated with
|
|
* --unified=0; sane people wouldn't do that to cause us
|
|
* trouble, but we try to please not so sane ones as well.
|
|
*/
|
|
if (unidiff_zero) {
|
|
match_beginning = (!leading && !frag->oldpos);
|
|
match_end = 0;
|
|
}
|
|
else {
|
|
match_beginning = !leading && (frag->oldpos == 1);
|
|
match_end = !trailing;
|
|
}
|
|
|
|
lines = 0;
|
|
pos = frag->newpos;
|
|
for (;;) {
|
|
offset = find_offset(buf, desc->size,
|
|
oldlines, oldsize, pos, &lines);
|
|
if (match_end && offset + oldsize != desc->size)
|
|
offset = -1;
|
|
if (match_beginning && offset)
|
|
offset = -1;
|
|
if (offset >= 0) {
|
|
int diff = newsize - oldsize;
|
|
unsigned long size = desc->size + diff;
|
|
unsigned long alloc = desc->alloc;
|
|
|
|
/* Warn if it was necessary to reduce the number
|
|
* of context lines.
|
|
*/
|
|
if ((leading != frag->leading) ||
|
|
(trailing != frag->trailing))
|
|
fprintf(stderr, "Context reduced to (%ld/%ld)"
|
|
" to apply fragment at %d\n",
|
|
leading, trailing, pos + lines);
|
|
|
|
if (size > alloc) {
|
|
alloc = size + 8192;
|
|
desc->alloc = alloc;
|
|
buf = xrealloc(buf, alloc);
|
|
desc->buffer = buf;
|
|
}
|
|
desc->size = size;
|
|
memmove(buf + offset + newsize,
|
|
buf + offset + oldsize,
|
|
size - offset - newsize);
|
|
memcpy(buf + offset, newlines, newsize);
|
|
offset = 0;
|
|
|
|
break;
|
|
}
|
|
|
|
/* Am I at my context limits? */
|
|
if ((leading <= p_context) && (trailing <= p_context))
|
|
break;
|
|
if (match_beginning || match_end) {
|
|
match_beginning = match_end = 0;
|
|
continue;
|
|
}
|
|
/* Reduce the number of context lines
|
|
* Reduce both leading and trailing if they are equal
|
|
* otherwise just reduce the larger context.
|
|
*/
|
|
if (leading >= trailing) {
|
|
remove_first_line(&oldlines, &oldsize);
|
|
remove_first_line(&newlines, &newsize);
|
|
pos--;
|
|
leading--;
|
|
}
|
|
if (trailing > leading) {
|
|
remove_last_line(&oldlines, &oldsize);
|
|
remove_last_line(&newlines, &newsize);
|
|
trailing--;
|
|
}
|
|
}
|
|
|
|
if (offset && apply_verbosely)
|
|
error("while searching for:\n%.*s", oldsize, oldlines);
|
|
|
|
free(old);
|
|
free(new);
|
|
return offset;
|
|
}
|
|
|
|
static int apply_binary_fragment(struct buffer_desc *desc, struct patch *patch)
|
|
{
|
|
unsigned long dst_size;
|
|
struct fragment *fragment = patch->fragments;
|
|
void *data;
|
|
void *result;
|
|
|
|
/* Binary patch is irreversible without the optional second hunk */
|
|
if (apply_in_reverse) {
|
|
if (!fragment->next)
|
|
return error("cannot reverse-apply a binary patch "
|
|
"without the reverse hunk to '%s'",
|
|
patch->new_name
|
|
? patch->new_name : patch->old_name);
|
|
fragment = fragment->next;
|
|
}
|
|
data = (void*) fragment->patch;
|
|
switch (fragment->binary_patch_method) {
|
|
case BINARY_DELTA_DEFLATED:
|
|
result = patch_delta(desc->buffer, desc->size,
|
|
data,
|
|
fragment->size,
|
|
&dst_size);
|
|
free(desc->buffer);
|
|
desc->buffer = result;
|
|
break;
|
|
case BINARY_LITERAL_DEFLATED:
|
|
free(desc->buffer);
|
|
desc->buffer = data;
|
|
dst_size = fragment->size;
|
|
break;
|
|
}
|
|
if (!desc->buffer)
|
|
return -1;
|
|
desc->size = desc->alloc = dst_size;
|
|
return 0;
|
|
}
|
|
|
|
static int apply_binary(struct buffer_desc *desc, struct patch *patch)
|
|
{
|
|
const char *name = patch->old_name ? patch->old_name : patch->new_name;
|
|
unsigned char sha1[20];
|
|
|
|
/* For safety, we require patch index line to contain
|
|
* full 40-byte textual SHA1 for old and new, at least for now.
|
|
*/
|
|
if (strlen(patch->old_sha1_prefix) != 40 ||
|
|
strlen(patch->new_sha1_prefix) != 40 ||
|
|
get_sha1_hex(patch->old_sha1_prefix, sha1) ||
|
|
get_sha1_hex(patch->new_sha1_prefix, sha1))
|
|
return error("cannot apply binary patch to '%s' "
|
|
"without full index line", name);
|
|
|
|
if (patch->old_name) {
|
|
/* See if the old one matches what the patch
|
|
* applies to.
|
|
*/
|
|
hash_sha1_file(desc->buffer, desc->size, blob_type, sha1);
|
|
if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
|
|
return error("the patch applies to '%s' (%s), "
|
|
"which does not match the "
|
|
"current contents.",
|
|
name, sha1_to_hex(sha1));
|
|
}
|
|
else {
|
|
/* Otherwise, the old one must be empty. */
|
|
if (desc->size)
|
|
return error("the patch applies to an empty "
|
|
"'%s' but it is not empty", name);
|
|
}
|
|
|
|
get_sha1_hex(patch->new_sha1_prefix, sha1);
|
|
if (is_null_sha1(sha1)) {
|
|
free(desc->buffer);
|
|
desc->alloc = desc->size = 0;
|
|
desc->buffer = NULL;
|
|
return 0; /* deletion patch */
|
|
}
|
|
|
|
if (has_sha1_file(sha1)) {
|
|
/* We already have the postimage */
|
|
enum object_type type;
|
|
unsigned long size;
|
|
|
|
free(desc->buffer);
|
|
desc->buffer = read_sha1_file(sha1, &type, &size);
|
|
if (!desc->buffer)
|
|
return error("the necessary postimage %s for "
|
|
"'%s' cannot be read",
|
|
patch->new_sha1_prefix, name);
|
|
desc->alloc = desc->size = size;
|
|
}
|
|
else {
|
|
/* We have verified desc matches the preimage;
|
|
* apply the patch data to it, which is stored
|
|
* in the patch->fragments->{patch,size}.
|
|
*/
|
|
if (apply_binary_fragment(desc, patch))
|
|
return error("binary patch does not apply to '%s'",
|
|
name);
|
|
|
|
/* verify that the result matches */
|
|
hash_sha1_file(desc->buffer, desc->size, blob_type, sha1);
|
|
if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix))
|
|
return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)", name, patch->new_sha1_prefix, sha1_to_hex(sha1));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int apply_fragments(struct buffer_desc *desc, struct patch *patch)
|
|
{
|
|
struct fragment *frag = patch->fragments;
|
|
const char *name = patch->old_name ? patch->old_name : patch->new_name;
|
|
|
|
if (patch->is_binary)
|
|
return apply_binary(desc, patch);
|
|
|
|
while (frag) {
|
|
if (apply_one_fragment(desc, frag, patch->inaccurate_eof)) {
|
|
error("patch failed: %s:%ld", name, frag->oldpos);
|
|
if (!apply_with_reject)
|
|
return -1;
|
|
frag->rejected = 1;
|
|
}
|
|
frag = frag->next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce)
|
|
{
|
|
char *buf;
|
|
unsigned long size, alloc;
|
|
struct buffer_desc desc;
|
|
|
|
size = 0;
|
|
alloc = 0;
|
|
buf = NULL;
|
|
if (cached) {
|
|
if (ce) {
|
|
enum object_type type;
|
|
buf = read_sha1_file(ce->sha1, &type, &size);
|
|
if (!buf)
|
|
return error("read of %s failed",
|
|
patch->old_name);
|
|
alloc = size;
|
|
}
|
|
}
|
|
else if (patch->old_name) {
|
|
size = xsize_t(st->st_size);
|
|
alloc = size + 8192;
|
|
buf = xmalloc(alloc);
|
|
if (read_old_data(st, patch->old_name, &buf, &alloc, &size))
|
|
return error("read of %s failed", patch->old_name);
|
|
}
|
|
|
|
desc.size = size;
|
|
desc.alloc = alloc;
|
|
desc.buffer = buf;
|
|
|
|
if (apply_fragments(&desc, patch) < 0)
|
|
return -1; /* note with --reject this succeeds. */
|
|
|
|
/* NUL terminate the result */
|
|
if (desc.alloc <= desc.size)
|
|
desc.buffer = xrealloc(desc.buffer, desc.size + 1);
|
|
desc.buffer[desc.size] = 0;
|
|
|
|
patch->result = desc.buffer;
|
|
patch->resultsize = desc.size;
|
|
|
|
if (0 < patch->is_delete && patch->resultsize)
|
|
return error("removal patch leaves file contents");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int check_patch(struct patch *patch, struct patch *prev_patch)
|
|
{
|
|
struct stat st;
|
|
const char *old_name = patch->old_name;
|
|
const char *new_name = patch->new_name;
|
|
const char *name = old_name ? old_name : new_name;
|
|
struct cache_entry *ce = NULL;
|
|
int ok_if_exists;
|
|
|
|
patch->rejected = 1; /* we will drop this after we succeed */
|
|
if (old_name) {
|
|
int changed = 0;
|
|
int stat_ret = 0;
|
|
unsigned st_mode = 0;
|
|
|
|
if (!cached)
|
|
stat_ret = lstat(old_name, &st);
|
|
if (check_index) {
|
|
int pos = cache_name_pos(old_name, strlen(old_name));
|
|
if (pos < 0)
|
|
return error("%s: does not exist in index",
|
|
old_name);
|
|
ce = active_cache[pos];
|
|
if (stat_ret < 0) {
|
|
struct checkout costate;
|
|
if (errno != ENOENT)
|
|
return error("%s: %s", old_name,
|
|
strerror(errno));
|
|
/* checkout */
|
|
costate.base_dir = "";
|
|
costate.base_dir_len = 0;
|
|
costate.force = 0;
|
|
costate.quiet = 0;
|
|
costate.not_new = 0;
|
|
costate.refresh_cache = 1;
|
|
if (checkout_entry(ce,
|
|
&costate,
|
|
NULL) ||
|
|
lstat(old_name, &st))
|
|
return -1;
|
|
}
|
|
if (!cached)
|
|
changed = ce_match_stat(ce, &st, 1);
|
|
if (changed)
|
|
return error("%s: does not match index",
|
|
old_name);
|
|
if (cached)
|
|
st_mode = ntohl(ce->ce_mode);
|
|
}
|
|
else if (stat_ret < 0)
|
|
return error("%s: %s", old_name, strerror(errno));
|
|
|
|
if (!cached)
|
|
st_mode = ntohl(ce_mode_from_stat(ce, st.st_mode));
|
|
|
|
if (patch->is_new < 0)
|
|
patch->is_new = 0;
|
|
if (!patch->old_mode)
|
|
patch->old_mode = st_mode;
|
|
if ((st_mode ^ patch->old_mode) & S_IFMT)
|
|
return error("%s: wrong type", old_name);
|
|
if (st_mode != patch->old_mode)
|
|
fprintf(stderr, "warning: %s has type %o, expected %o\n",
|
|
old_name, st_mode, patch->old_mode);
|
|
}
|
|
|
|
if (new_name && prev_patch && 0 < prev_patch->is_delete &&
|
|
!strcmp(prev_patch->old_name, new_name))
|
|
/* A type-change diff is always split into a patch to
|
|
* delete old, immediately followed by a patch to
|
|
* create new (see diff.c::run_diff()); in such a case
|
|
* it is Ok that the entry to be deleted by the
|
|
* previous patch is still in the working tree and in
|
|
* the index.
|
|
*/
|
|
ok_if_exists = 1;
|
|
else
|
|
ok_if_exists = 0;
|
|
|
|
if (new_name &&
|
|
((0 < patch->is_new) | (0 < patch->is_rename) | patch->is_copy)) {
|
|
if (check_index &&
|
|
cache_name_pos(new_name, strlen(new_name)) >= 0 &&
|
|
!ok_if_exists)
|
|
return error("%s: already exists in index", new_name);
|
|
if (!cached) {
|
|
struct stat nst;
|
|
if (!lstat(new_name, &nst)) {
|
|
if (S_ISDIR(nst.st_mode) || ok_if_exists)
|
|
; /* ok */
|
|
else
|
|
return error("%s: already exists in working directory", new_name);
|
|
}
|
|
else if ((errno != ENOENT) && (errno != ENOTDIR))
|
|
return error("%s: %s", new_name, strerror(errno));
|
|
}
|
|
if (!patch->new_mode) {
|
|
if (0 < patch->is_new)
|
|
patch->new_mode = S_IFREG | 0644;
|
|
else
|
|
patch->new_mode = patch->old_mode;
|
|
}
|
|
}
|
|
|
|
if (new_name && old_name) {
|
|
int same = !strcmp(old_name, new_name);
|
|
if (!patch->new_mode)
|
|
patch->new_mode = patch->old_mode;
|
|
if ((patch->old_mode ^ patch->new_mode) & S_IFMT)
|
|
return error("new mode (%o) of %s does not match old mode (%o)%s%s",
|
|
patch->new_mode, new_name, patch->old_mode,
|
|
same ? "" : " of ", same ? "" : old_name);
|
|
}
|
|
|
|
if (apply_data(patch, &st, ce) < 0)
|
|
return error("%s: patch does not apply", name);
|
|
patch->rejected = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int check_patch_list(struct patch *patch)
|
|
{
|
|
struct patch *prev_patch = NULL;
|
|
int err = 0;
|
|
|
|
for (prev_patch = NULL; patch ; patch = patch->next) {
|
|
if (apply_verbosely)
|
|
say_patch_name(stderr,
|
|
"Checking patch ", patch, "...\n");
|
|
err |= check_patch(patch, prev_patch);
|
|
prev_patch = patch;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static void show_index_list(struct patch *list)
|
|
{
|
|
struct patch *patch;
|
|
|
|
/* Once we start supporting the reverse patch, it may be
|
|
* worth showing the new sha1 prefix, but until then...
|
|
*/
|
|
for (patch = list; patch; patch = patch->next) {
|
|
const unsigned char *sha1_ptr;
|
|
unsigned char sha1[20];
|
|
const char *name;
|
|
|
|
name = patch->old_name ? patch->old_name : patch->new_name;
|
|
if (0 < patch->is_new)
|
|
sha1_ptr = null_sha1;
|
|
else if (get_sha1(patch->old_sha1_prefix, sha1))
|
|
die("sha1 information is lacking or useless (%s).",
|
|
name);
|
|
else
|
|
sha1_ptr = sha1;
|
|
|
|
printf("%06o %s ",patch->old_mode, sha1_to_hex(sha1_ptr));
|
|
if (line_termination && quote_c_style(name, NULL, NULL, 0))
|
|
quote_c_style(name, NULL, stdout, 0);
|
|
else
|
|
fputs(name, stdout);
|
|
putchar(line_termination);
|
|
}
|
|
}
|
|
|
|
static void stat_patch_list(struct patch *patch)
|
|
{
|
|
int files, adds, dels;
|
|
|
|
for (files = adds = dels = 0 ; patch ; patch = patch->next) {
|
|
files++;
|
|
adds += patch->lines_added;
|
|
dels += patch->lines_deleted;
|
|
show_stats(patch);
|
|
}
|
|
|
|
printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
|
|
}
|
|
|
|
static void numstat_patch_list(struct patch *patch)
|
|
{
|
|
for ( ; patch; patch = patch->next) {
|
|
const char *name;
|
|
name = patch->new_name ? patch->new_name : patch->old_name;
|
|
if (patch->is_binary)
|
|
printf("-\t-\t");
|
|
else
|
|
printf("%d\t%d\t",
|
|
patch->lines_added, patch->lines_deleted);
|
|
if (line_termination && quote_c_style(name, NULL, NULL, 0))
|
|
quote_c_style(name, NULL, stdout, 0);
|
|
else
|
|
fputs(name, stdout);
|
|
putchar(line_termination);
|
|
}
|
|
}
|
|
|
|
static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
|
|
{
|
|
if (mode)
|
|
printf(" %s mode %06o %s\n", newdelete, mode, name);
|
|
else
|
|
printf(" %s %s\n", newdelete, name);
|
|
}
|
|
|
|
static void show_mode_change(struct patch *p, int show_name)
|
|
{
|
|
if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
|
|
if (show_name)
|
|
printf(" mode change %06o => %06o %s\n",
|
|
p->old_mode, p->new_mode, p->new_name);
|
|
else
|
|
printf(" mode change %06o => %06o\n",
|
|
p->old_mode, p->new_mode);
|
|
}
|
|
}
|
|
|
|
static void show_rename_copy(struct patch *p)
|
|
{
|
|
const char *renamecopy = p->is_rename ? "rename" : "copy";
|
|
const char *old, *new;
|
|
|
|
/* Find common prefix */
|
|
old = p->old_name;
|
|
new = p->new_name;
|
|
while (1) {
|
|
const char *slash_old, *slash_new;
|
|
slash_old = strchr(old, '/');
|
|
slash_new = strchr(new, '/');
|
|
if (!slash_old ||
|
|
!slash_new ||
|
|
slash_old - old != slash_new - new ||
|
|
memcmp(old, new, slash_new - new))
|
|
break;
|
|
old = slash_old + 1;
|
|
new = slash_new + 1;
|
|
}
|
|
/* p->old_name thru old is the common prefix, and old and new
|
|
* through the end of names are renames
|
|
*/
|
|
if (old != p->old_name)
|
|
printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
|
|
(int)(old - p->old_name), p->old_name,
|
|
old, new, p->score);
|
|
else
|
|
printf(" %s %s => %s (%d%%)\n", renamecopy,
|
|
p->old_name, p->new_name, p->score);
|
|
show_mode_change(p, 0);
|
|
}
|
|
|
|
static void summary_patch_list(struct patch *patch)
|
|
{
|
|
struct patch *p;
|
|
|
|
for (p = patch; p; p = p->next) {
|
|
if (p->is_new)
|
|
show_file_mode_name("create", p->new_mode, p->new_name);
|
|
else if (p->is_delete)
|
|
show_file_mode_name("delete", p->old_mode, p->old_name);
|
|
else {
|
|
if (p->is_rename || p->is_copy)
|
|
show_rename_copy(p);
|
|
else {
|
|
if (p->score) {
|
|
printf(" rewrite %s (%d%%)\n",
|
|
p->new_name, p->score);
|
|
show_mode_change(p, 0);
|
|
}
|
|
else
|
|
show_mode_change(p, 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void patch_stats(struct patch *patch)
|
|
{
|
|
int lines = patch->lines_added + patch->lines_deleted;
|
|
|
|
if (lines > max_change)
|
|
max_change = lines;
|
|
if (patch->old_name) {
|
|
int len = quote_c_style(patch->old_name, NULL, NULL, 0);
|
|
if (!len)
|
|
len = strlen(patch->old_name);
|
|
if (len > max_len)
|
|
max_len = len;
|
|
}
|
|
if (patch->new_name) {
|
|
int len = quote_c_style(patch->new_name, NULL, NULL, 0);
|
|
if (!len)
|
|
len = strlen(patch->new_name);
|
|
if (len > max_len)
|
|
max_len = len;
|
|
}
|
|
}
|
|
|
|
static void remove_file(struct patch *patch, int rmdir_empty)
|
|
{
|
|
if (write_index) {
|
|
if (remove_file_from_cache(patch->old_name) < 0)
|
|
die("unable to remove %s from index", patch->old_name);
|
|
cache_tree_invalidate_path(active_cache_tree, patch->old_name);
|
|
}
|
|
if (!cached) {
|
|
if (!unlink(patch->old_name) && rmdir_empty) {
|
|
char *name = xstrdup(patch->old_name);
|
|
char *end = strrchr(name, '/');
|
|
while (end) {
|
|
*end = 0;
|
|
if (rmdir(name))
|
|
break;
|
|
end = strrchr(name, '/');
|
|
}
|
|
free(name);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size)
|
|
{
|
|
struct stat st;
|
|
struct cache_entry *ce;
|
|
int namelen = strlen(path);
|
|
unsigned ce_size = cache_entry_size(namelen);
|
|
|
|
if (!write_index)
|
|
return;
|
|
|
|
ce = xcalloc(1, ce_size);
|
|
memcpy(ce->name, path, namelen);
|
|
ce->ce_mode = create_ce_mode(mode);
|
|
ce->ce_flags = htons(namelen);
|
|
if (!cached) {
|
|
if (lstat(path, &st) < 0)
|
|
die("unable to stat newly created file %s", path);
|
|
fill_stat_cache_info(ce, &st);
|
|
}
|
|
if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0)
|
|
die("unable to create backing store for newly created file %s", path);
|
|
if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
|
|
die("unable to add cache entry for %s", path);
|
|
}
|
|
|
|
static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
|
|
{
|
|
int fd, converted;
|
|
char *nbuf;
|
|
unsigned long nsize;
|
|
|
|
if (has_symlinks && S_ISLNK(mode))
|
|
/* Although buf:size is counted string, it also is NUL
|
|
* terminated.
|
|
*/
|
|
return symlink(buf, path);
|
|
|
|
fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
nsize = size;
|
|
nbuf = (char *) buf;
|
|
converted = convert_to_working_tree(path, &nbuf, &nsize);
|
|
if (converted) {
|
|
buf = nbuf;
|
|
size = nsize;
|
|
}
|
|
while (size) {
|
|
int written = xwrite(fd, buf, size);
|
|
if (written < 0)
|
|
die("writing file %s: %s", path, strerror(errno));
|
|
if (!written)
|
|
die("out of space writing file %s", path);
|
|
buf += written;
|
|
size -= written;
|
|
}
|
|
if (close(fd) < 0)
|
|
die("closing file %s: %s", path, strerror(errno));
|
|
if (converted)
|
|
free(nbuf);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We optimistically assume that the directories exist,
|
|
* which is true 99% of the time anyway. If they don't,
|
|
* we create them and try again.
|
|
*/
|
|
static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size)
|
|
{
|
|
if (cached)
|
|
return;
|
|
if (!try_create_file(path, mode, buf, size))
|
|
return;
|
|
|
|
if (errno == ENOENT) {
|
|
if (safe_create_leading_directories(path))
|
|
return;
|
|
if (!try_create_file(path, mode, buf, size))
|
|
return;
|
|
}
|
|
|
|
if (errno == EEXIST || errno == EACCES) {
|
|
/* We may be trying to create a file where a directory
|
|
* used to be.
|
|
*/
|
|
struct stat st;
|
|
errno = 0;
|
|
if (!lstat(path, &st) && S_ISDIR(st.st_mode) && !rmdir(path))
|
|
errno = EEXIST;
|
|
}
|
|
|
|
if (errno == EEXIST) {
|
|
unsigned int nr = getpid();
|
|
|
|
for (;;) {
|
|
const char *newpath;
|
|
newpath = mkpath("%s~%u", path, nr);
|
|
if (!try_create_file(newpath, mode, buf, size)) {
|
|
if (!rename(newpath, path))
|
|
return;
|
|
unlink(newpath);
|
|
break;
|
|
}
|
|
if (errno != EEXIST)
|
|
break;
|
|
++nr;
|
|
}
|
|
}
|
|
die("unable to write file %s mode %o", path, mode);
|
|
}
|
|
|
|
static void create_file(struct patch *patch)
|
|
{
|
|
char *path = patch->new_name;
|
|
unsigned mode = patch->new_mode;
|
|
unsigned long size = patch->resultsize;
|
|
char *buf = patch->result;
|
|
|
|
if (!mode)
|
|
mode = S_IFREG | 0644;
|
|
create_one_file(path, mode, buf, size);
|
|
add_index_file(path, mode, buf, size);
|
|
cache_tree_invalidate_path(active_cache_tree, path);
|
|
}
|
|
|
|
/* phase zero is to remove, phase one is to create */
|
|
static void write_out_one_result(struct patch *patch, int phase)
|
|
{
|
|
if (patch->is_delete > 0) {
|
|
if (phase == 0)
|
|
remove_file(patch, 1);
|
|
return;
|
|
}
|
|
if (patch->is_new > 0 || patch->is_copy) {
|
|
if (phase == 1)
|
|
create_file(patch);
|
|
return;
|
|
}
|
|
/*
|
|
* Rename or modification boils down to the same
|
|
* thing: remove the old, write the new
|
|
*/
|
|
if (phase == 0)
|
|
remove_file(patch, 0);
|
|
if (phase == 1)
|
|
create_file(patch);
|
|
}
|
|
|
|
static int write_out_one_reject(struct patch *patch)
|
|
{
|
|
FILE *rej;
|
|
char namebuf[PATH_MAX];
|
|
struct fragment *frag;
|
|
int cnt = 0;
|
|
|
|
for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) {
|
|
if (!frag->rejected)
|
|
continue;
|
|
cnt++;
|
|
}
|
|
|
|
if (!cnt) {
|
|
if (apply_verbosely)
|
|
say_patch_name(stderr,
|
|
"Applied patch ", patch, " cleanly.\n");
|
|
return 0;
|
|
}
|
|
|
|
/* This should not happen, because a removal patch that leaves
|
|
* contents are marked "rejected" at the patch level.
|
|
*/
|
|
if (!patch->new_name)
|
|
die("internal error");
|
|
|
|
/* Say this even without --verbose */
|
|
say_patch_name(stderr, "Applying patch ", patch, " with");
|
|
fprintf(stderr, " %d rejects...\n", cnt);
|
|
|
|
cnt = strlen(patch->new_name);
|
|
if (ARRAY_SIZE(namebuf) <= cnt + 5) {
|
|
cnt = ARRAY_SIZE(namebuf) - 5;
|
|
fprintf(stderr,
|
|
"warning: truncating .rej filename to %.*s.rej",
|
|
cnt - 1, patch->new_name);
|
|
}
|
|
memcpy(namebuf, patch->new_name, cnt);
|
|
memcpy(namebuf + cnt, ".rej", 5);
|
|
|
|
rej = fopen(namebuf, "w");
|
|
if (!rej)
|
|
return error("cannot open %s: %s", namebuf, strerror(errno));
|
|
|
|
/* Normal git tools never deal with .rej, so do not pretend
|
|
* this is a git patch by saying --git nor give extended
|
|
* headers. While at it, maybe please "kompare" that wants
|
|
* the trailing TAB and some garbage at the end of line ;-).
|
|
*/
|
|
fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n",
|
|
patch->new_name, patch->new_name);
|
|
for (cnt = 1, frag = patch->fragments;
|
|
frag;
|
|
cnt++, frag = frag->next) {
|
|
if (!frag->rejected) {
|
|
fprintf(stderr, "Hunk #%d applied cleanly.\n", cnt);
|
|
continue;
|
|
}
|
|
fprintf(stderr, "Rejected hunk #%d.\n", cnt);
|
|
fprintf(rej, "%.*s", frag->size, frag->patch);
|
|
if (frag->patch[frag->size-1] != '\n')
|
|
fputc('\n', rej);
|
|
}
|
|
fclose(rej);
|
|
return -1;
|
|
}
|
|
|
|
static int write_out_results(struct patch *list, int skipped_patch)
|
|
{
|
|
int phase;
|
|
int errs = 0;
|
|
struct patch *l;
|
|
|
|
if (!list && !skipped_patch)
|
|
return error("No changes");
|
|
|
|
for (phase = 0; phase < 2; phase++) {
|
|
l = list;
|
|
while (l) {
|
|
if (l->rejected)
|
|
errs = 1;
|
|
else {
|
|
write_out_one_result(l, phase);
|
|
if (phase == 1 && write_out_one_reject(l))
|
|
errs = 1;
|
|
}
|
|
l = l->next;
|
|
}
|
|
}
|
|
return errs;
|
|
}
|
|
|
|
static struct lock_file lock_file;
|
|
|
|
static struct excludes {
|
|
struct excludes *next;
|
|
const char *path;
|
|
} *excludes;
|
|
|
|
static int use_patch(struct patch *p)
|
|
{
|
|
const char *pathname = p->new_name ? p->new_name : p->old_name;
|
|
struct excludes *x = excludes;
|
|
while (x) {
|
|
if (fnmatch(x->path, pathname, 0) == 0)
|
|
return 0;
|
|
x = x->next;
|
|
}
|
|
if (0 < prefix_length) {
|
|
int pathlen = strlen(pathname);
|
|
if (pathlen <= prefix_length ||
|
|
memcmp(prefix, pathname, prefix_length))
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void prefix_one(char **name)
|
|
{
|
|
char *old_name = *name;
|
|
if (!old_name)
|
|
return;
|
|
*name = xstrdup(prefix_filename(prefix, prefix_length, *name));
|
|
free(old_name);
|
|
}
|
|
|
|
static void prefix_patches(struct patch *p)
|
|
{
|
|
if (!prefix || p->is_toplevel_relative)
|
|
return;
|
|
for ( ; p; p = p->next) {
|
|
if (p->new_name == p->old_name) {
|
|
char *prefixed = p->new_name;
|
|
prefix_one(&prefixed);
|
|
p->new_name = p->old_name = prefixed;
|
|
}
|
|
else {
|
|
prefix_one(&p->new_name);
|
|
prefix_one(&p->old_name);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int apply_patch(int fd, const char *filename, int inaccurate_eof)
|
|
{
|
|
unsigned long offset, size;
|
|
char *buffer = read_patch_file(fd, &size);
|
|
struct patch *list = NULL, **listp = &list;
|
|
int skipped_patch = 0;
|
|
|
|
patch_input_file = filename;
|
|
if (!buffer)
|
|
return -1;
|
|
offset = 0;
|
|
while (size > 0) {
|
|
struct patch *patch;
|
|
int nr;
|
|
|
|
patch = xcalloc(1, sizeof(*patch));
|
|
patch->inaccurate_eof = inaccurate_eof;
|
|
nr = parse_chunk(buffer + offset, size, patch);
|
|
if (nr < 0)
|
|
break;
|
|
if (apply_in_reverse)
|
|
reverse_patches(patch);
|
|
if (prefix)
|
|
prefix_patches(patch);
|
|
if (use_patch(patch)) {
|
|
patch_stats(patch);
|
|
*listp = patch;
|
|
listp = &patch->next;
|
|
}
|
|
else {
|
|
/* perhaps free it a bit better? */
|
|
free(patch);
|
|
skipped_patch++;
|
|
}
|
|
offset += nr;
|
|
size -= nr;
|
|
}
|
|
|
|
if (whitespace_error && (new_whitespace == error_on_whitespace))
|
|
apply = 0;
|
|
|
|
write_index = check_index && apply;
|
|
if (write_index && newfd < 0)
|
|
newfd = hold_lock_file_for_update(&lock_file,
|
|
get_index_file(), 1);
|
|
if (check_index) {
|
|
if (read_cache() < 0)
|
|
die("unable to read index file");
|
|
}
|
|
|
|
if ((check || apply) &&
|
|
check_patch_list(list) < 0 &&
|
|
!apply_with_reject)
|
|
exit(1);
|
|
|
|
if (apply && write_out_results(list, skipped_patch))
|
|
exit(1);
|
|
|
|
if (show_index_info)
|
|
show_index_list(list);
|
|
|
|
if (diffstat)
|
|
stat_patch_list(list);
|
|
|
|
if (numstat)
|
|
numstat_patch_list(list);
|
|
|
|
if (summary)
|
|
summary_patch_list(list);
|
|
|
|
free(buffer);
|
|
return 0;
|
|
}
|
|
|
|
static int git_apply_config(const char *var, const char *value)
|
|
{
|
|
if (!strcmp(var, "apply.whitespace")) {
|
|
apply_default_whitespace = xstrdup(value);
|
|
return 0;
|
|
}
|
|
return git_default_config(var, value);
|
|
}
|
|
|
|
|
|
int cmd_apply(int argc, const char **argv, const char *unused_prefix)
|
|
{
|
|
int i;
|
|
int read_stdin = 1;
|
|
int inaccurate_eof = 0;
|
|
int errs = 0;
|
|
int is_not_gitdir = 0;
|
|
|
|
const char *whitespace_option = NULL;
|
|
|
|
prefix = setup_git_directory_gently(&is_not_gitdir);
|
|
prefix_length = prefix ? strlen(prefix) : 0;
|
|
git_config(git_apply_config);
|
|
if (apply_default_whitespace)
|
|
parse_whitespace_option(apply_default_whitespace);
|
|
|
|
for (i = 1; i < argc; i++) {
|
|
const char *arg = argv[i];
|
|
char *end;
|
|
int fd;
|
|
|
|
if (!strcmp(arg, "-")) {
|
|
errs |= apply_patch(0, "<stdin>", inaccurate_eof);
|
|
read_stdin = 0;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--exclude=")) {
|
|
struct excludes *x = xmalloc(sizeof(*x));
|
|
x->path = arg + 10;
|
|
x->next = excludes;
|
|
excludes = x;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "-p")) {
|
|
p_value = atoi(arg + 2);
|
|
p_value_known = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--no-add")) {
|
|
no_add = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--stat")) {
|
|
apply = 0;
|
|
diffstat = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--allow-binary-replacement") ||
|
|
!strcmp(arg, "--binary")) {
|
|
continue; /* now no-op */
|
|
}
|
|
if (!strcmp(arg, "--numstat")) {
|
|
apply = 0;
|
|
numstat = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--summary")) {
|
|
apply = 0;
|
|
summary = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--check")) {
|
|
apply = 0;
|
|
check = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--index")) {
|
|
if (is_not_gitdir)
|
|
die("--index outside a repository");
|
|
check_index = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--cached")) {
|
|
if (is_not_gitdir)
|
|
die("--cached outside a repository");
|
|
check_index = 1;
|
|
cached = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--apply")) {
|
|
apply = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--index-info")) {
|
|
apply = 0;
|
|
show_index_info = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-z")) {
|
|
line_termination = 0;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "-C")) {
|
|
p_context = strtoul(arg + 2, &end, 0);
|
|
if (*end != '\0')
|
|
die("unrecognized context count '%s'", arg + 2);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--whitespace=")) {
|
|
whitespace_option = arg + 13;
|
|
parse_whitespace_option(arg + 13);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-R") || !strcmp(arg, "--reverse")) {
|
|
apply_in_reverse = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--unidiff-zero")) {
|
|
unidiff_zero = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--reject")) {
|
|
apply = apply_with_reject = apply_verbosely = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "-v") || !strcmp(arg, "--verbose")) {
|
|
apply_verbosely = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--inaccurate-eof")) {
|
|
inaccurate_eof = 1;
|
|
continue;
|
|
}
|
|
if (0 < prefix_length)
|
|
arg = prefix_filename(prefix, prefix_length, arg);
|
|
|
|
fd = open(arg, O_RDONLY);
|
|
if (fd < 0)
|
|
usage(apply_usage);
|
|
read_stdin = 0;
|
|
set_default_whitespace_mode(whitespace_option);
|
|
errs |= apply_patch(fd, arg, inaccurate_eof);
|
|
close(fd);
|
|
}
|
|
set_default_whitespace_mode(whitespace_option);
|
|
if (read_stdin)
|
|
errs |= apply_patch(0, "<stdin>", inaccurate_eof);
|
|
if (whitespace_error) {
|
|
if (squelch_whitespace_errors &&
|
|
squelch_whitespace_errors < whitespace_error) {
|
|
int squelched =
|
|
whitespace_error - squelch_whitespace_errors;
|
|
fprintf(stderr, "warning: squelched %d "
|
|
"whitespace error%s\n",
|
|
squelched,
|
|
squelched == 1 ? "" : "s");
|
|
}
|
|
if (new_whitespace == error_on_whitespace)
|
|
die("%d line%s add%s trailing whitespaces.",
|
|
whitespace_error,
|
|
whitespace_error == 1 ? "" : "s",
|
|
whitespace_error == 1 ? "s" : "");
|
|
if (applied_after_stripping)
|
|
fprintf(stderr, "warning: %d line%s applied after"
|
|
" stripping trailing whitespaces.\n",
|
|
applied_after_stripping,
|
|
applied_after_stripping == 1 ? "" : "s");
|
|
else if (whitespace_error)
|
|
fprintf(stderr, "warning: %d line%s add%s trailing"
|
|
" whitespaces.\n",
|
|
whitespace_error,
|
|
whitespace_error == 1 ? "" : "s",
|
|
whitespace_error == 1 ? "s" : "");
|
|
}
|
|
|
|
if (write_index) {
|
|
if (write_cache(newfd, active_cache, active_nr) ||
|
|
close(newfd) || commit_lock_file(&lock_file))
|
|
die("Unable to write new index file");
|
|
}
|
|
|
|
return !!errs;
|
|
}
|