2b60356da5
This patch on top of 'next' makes built-in git-cherry handle root commits. It moves the static function log-tree.c::diff_root_tree() to tree-diff.c and makes it more similar to diff_tree_sha1() by shuffling around arguments and factoring out the call to log_tree_diff_flush(). Consequently the name is changed to diff_root_tree_sha1(). It is a version of diff_tree_sha1() that compares the empty tree (= root tree) against a single 'real' tree. This function is then used in get_patch_id() to compute patch IDs for initial commits instead of SEGFAULTing, as the current code does if confronted with parentless commits. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <junkio@cox.net>
335 lines
8.3 KiB
C
335 lines
8.3 KiB
C
#include "cache.h"
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#include "diff.h"
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#include "commit.h"
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#include "log-tree.h"
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static void show_parents(struct commit *commit, int abbrev)
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{
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struct commit_list *p;
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for (p = commit->parents; p ; p = p->next) {
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struct commit *parent = p->item;
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printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
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}
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}
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/*
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* Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
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* Signed-off-by: and Acked-by: lines.
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*/
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static int detect_any_signoff(char *letter, int size)
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{
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char ch, *cp;
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int seen_colon = 0;
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int seen_at = 0;
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int seen_name = 0;
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int seen_head = 0;
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cp = letter + size;
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while (letter <= --cp && (ch = *cp) == '\n')
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continue;
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while (letter <= cp) {
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ch = *cp--;
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if (ch == '\n')
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break;
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if (!seen_at) {
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if (ch == '@')
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seen_at = 1;
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continue;
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}
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if (!seen_colon) {
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if (ch == '@')
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return 0;
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else if (ch == ':')
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seen_colon = 1;
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else
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seen_name = 1;
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continue;
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}
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if (('A' <= ch && ch <= 'Z') ||
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('a' <= ch && ch <= 'z') ||
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ch == '-') {
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seen_head = 1;
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continue;
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}
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/* no empty last line doesn't match */
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return 0;
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}
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return seen_head && seen_name;
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}
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static int append_signoff(char *buf, int buf_sz, int at, const char *signoff)
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{
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static const char signed_off_by[] = "Signed-off-by: ";
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int signoff_len = strlen(signoff);
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int has_signoff = 0;
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char *cp = buf;
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/* Do we have enough space to add it? */
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if (buf_sz - at <= strlen(signed_off_by) + signoff_len + 3)
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return at;
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/* First see if we already have the sign-off by the signer */
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while ((cp = strstr(cp, signed_off_by))) {
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has_signoff = 1;
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cp += strlen(signed_off_by);
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if (cp + signoff_len >= buf + at)
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break;
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if (strncmp(cp, signoff, signoff_len))
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continue;
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if (!isspace(cp[signoff_len]))
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continue;
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/* we already have him */
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return at;
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}
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if (!has_signoff)
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has_signoff = detect_any_signoff(buf, at);
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if (!has_signoff)
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buf[at++] = '\n';
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strcpy(buf + at, signed_off_by);
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at += strlen(signed_off_by);
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strcpy(buf + at, signoff);
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at += signoff_len;
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buf[at++] = '\n';
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buf[at] = 0;
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return at;
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}
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void show_log(struct rev_info *opt, const char *sep)
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{
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static char this_header[16384];
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struct log_info *log = opt->loginfo;
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struct commit *commit = log->commit, *parent = log->parent;
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int abbrev = opt->diffopt.abbrev;
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int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
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const char *extra;
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int len;
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const char *subject = NULL, *extra_headers = opt->extra_headers;
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opt->loginfo = NULL;
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if (!opt->verbose_header) {
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fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
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if (opt->parents)
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show_parents(commit, abbrev_commit);
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putchar(opt->diffopt.line_termination);
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return;
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}
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/*
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* The "oneline" format has several special cases:
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* - The pretty-printed commit lacks a newline at the end
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* of the buffer, but we do want to make sure that we
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* have a newline there. If the separator isn't already
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* a newline, add an extra one.
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* - unlike other log messages, the one-line format does
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* not have an empty line between entries.
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*/
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extra = "";
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if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
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extra = "\n";
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if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
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putchar('\n');
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opt->shown_one = 1;
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/*
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* Print header line of header..
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*/
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if (opt->commit_format == CMIT_FMT_EMAIL) {
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char *sha1 = sha1_to_hex(commit->object.sha1);
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if (opt->total > 0) {
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static char buffer[64];
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snprintf(buffer, sizeof(buffer),
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"Subject: [PATCH %d/%d] ",
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opt->nr, opt->total);
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subject = buffer;
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} else if (opt->total == 0)
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subject = "Subject: [PATCH] ";
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else
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subject = "Subject: ";
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printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
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if (opt->message_id)
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printf("Message-Id: <%s>\n", opt->message_id);
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if (opt->ref_message_id)
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printf("In-Reply-To: <%s>\nReferences: <%s>\n",
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opt->ref_message_id, opt->ref_message_id);
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if (opt->mime_boundary) {
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static char subject_buffer[1024];
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static char buffer[1024];
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snprintf(subject_buffer, sizeof(subject_buffer) - 1,
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"%s"
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"MIME-Version: 1.0\n"
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"Content-Type: multipart/mixed;\n"
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" boundary=\"%s%s\"\n"
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"\n"
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"This is a multi-part message in MIME "
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"format.\n"
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"--%s%s\n"
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"Content-Type: text/plain; "
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"charset=UTF-8; format=fixed\n"
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"Content-Transfer-Encoding: 8bit\n\n",
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extra_headers ? extra_headers : "",
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mime_boundary_leader, opt->mime_boundary,
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mime_boundary_leader, opt->mime_boundary);
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extra_headers = subject_buffer;
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snprintf(buffer, sizeof(buffer) - 1,
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"--%s%s\n"
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"Content-Type: text/x-patch;\n"
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" name=\"%s.diff\"\n"
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"Content-Transfer-Encoding: 8bit\n"
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"Content-Disposition: inline;\n"
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" filename=\"%s.diff\"\n\n",
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mime_boundary_leader, opt->mime_boundary,
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sha1, sha1);
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opt->diffopt.stat_sep = buffer;
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}
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} else {
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printf("%s%s%s",
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diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
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opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
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diff_unique_abbrev(commit->object.sha1, abbrev_commit));
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if (opt->parents)
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show_parents(commit, abbrev_commit);
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if (parent)
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printf(" (from %s)",
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diff_unique_abbrev(parent->object.sha1,
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abbrev_commit));
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printf("%s",
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diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
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putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
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}
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/*
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* And then the pretty-printed message itself
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*/
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len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header,
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sizeof(this_header), abbrev, subject,
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extra_headers, opt->relative_date);
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if (opt->add_signoff)
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len = append_signoff(this_header, sizeof(this_header), len,
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opt->add_signoff);
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printf("%s%s%s", this_header, extra, sep);
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}
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int log_tree_diff_flush(struct rev_info *opt)
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{
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diffcore_std(&opt->diffopt);
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if (diff_queue_is_empty()) {
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int saved_fmt = opt->diffopt.output_format;
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opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
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diff_flush(&opt->diffopt);
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opt->diffopt.output_format = saved_fmt;
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return 0;
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}
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if (opt->loginfo && !opt->no_commit_id) {
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/* When showing a verbose header (i.e. log message),
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* and not in --pretty=oneline format, we would want
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* an extra newline between the end of log and the
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* output for readability.
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*/
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show_log(opt, opt->diffopt.msg_sep);
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if (opt->verbose_header &&
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opt->commit_format != CMIT_FMT_ONELINE) {
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int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
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if ((pch & opt->diffopt.output_format) == pch)
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printf("---%c", opt->diffopt.line_termination);
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else
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putchar(opt->diffopt.line_termination);
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}
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}
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diff_flush(&opt->diffopt);
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return 1;
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}
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static int do_diff_combined(struct rev_info *opt, struct commit *commit)
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{
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unsigned const char *sha1 = commit->object.sha1;
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diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
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return !opt->loginfo;
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}
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/*
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* Show the diff of a commit.
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*
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* Return true if we printed any log info messages
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*/
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static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
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{
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int showed_log;
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struct commit_list *parents;
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unsigned const char *sha1 = commit->object.sha1;
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if (!opt->diff)
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return 0;
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/* Root commit? */
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parents = commit->parents;
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if (!parents) {
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if (opt->show_root_diff) {
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diff_root_tree_sha1(sha1, "", &opt->diffopt);
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log_tree_diff_flush(opt);
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}
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return !opt->loginfo;
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}
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/* More than one parent? */
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if (parents && parents->next) {
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if (opt->ignore_merges)
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return 0;
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else if (opt->combine_merges)
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return do_diff_combined(opt, commit);
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/* If we show individual diffs, show the parent info */
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log->parent = parents->item;
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}
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showed_log = 0;
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for (;;) {
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struct commit *parent = parents->item;
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diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
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log_tree_diff_flush(opt);
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showed_log |= !opt->loginfo;
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/* Set up the log info for the next parent, if any.. */
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parents = parents->next;
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if (!parents)
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break;
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log->parent = parents->item;
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opt->loginfo = log;
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}
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return showed_log;
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}
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int log_tree_commit(struct rev_info *opt, struct commit *commit)
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{
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struct log_info log;
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int shown;
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log.commit = commit;
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log.parent = NULL;
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opt->loginfo = &log;
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shown = log_tree_diff(opt, commit, &log);
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if (!shown && opt->loginfo && opt->always_show_header) {
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log.parent = NULL;
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show_log(opt, "");
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shown = 1;
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}
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opt->loginfo = NULL;
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return shown;
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}
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