be3cfa85f4
This reworks the diff-tree-helper and show-diff to further make external diff command interface simpler. These commands now honor GIT_EXTERNAL_DIFF environment variable which can point at an arbitrary program that takes 7 parameters: name file1 file1-sha1 file1-mode file2 file2-sha1 file2-mode The parameters for an external diff command are as follows: name this invocation of the command is to emit diff for the named cache/tree entry. file1 pathname that holds the contents of the first file. This can be a file inside the working tree, or a temporary file created from the blob object, or /dev/null. The command should not attempt to unlink it -- the temporary is unlinked by the caller. file1-sha1 sha1 hash if file1 is a blob object, or "." otherwise. file1-mode mode bits for file1, or "." for a deleted file. If GIT_EXTERNAL_DIFF environment variable is not set, the default is to invoke diff with the set of parameters old show-diff used to use. This built-in implementation honors the GIT_DIFF_CMD and GIT_DIFF_OPTS environment variables as before. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "cache.h"
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#include "diff.h"
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static const char *show_diff_usage = "show-diff [-q] [-s] [-z] [paths...]";
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static int matches_pathspec(struct cache_entry *ce, char **spec, int cnt)
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{
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int i;
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int namelen = ce_namelen(ce);
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for (i = 0; i < cnt; i++) {
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int speclen = strlen(spec[i]);
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if (! strncmp(spec[i], ce->name, speclen) &&
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speclen <= namelen &&
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(ce->name[speclen] == 0 ||
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ce->name[speclen] == '/'))
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return 1;
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}
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return 0;
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}
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int main(int argc, char **argv)
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{
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int silent = 0;
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int silent_on_nonexisting_files = 0;
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int machine_readable = 0;
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int reverse = 0;
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int entries = read_cache();
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int i;
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while (1 < argc && argv[1][0] == '-') {
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if (!strcmp(argv[1], "-R"))
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reverse = 1;
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else if (!strcmp(argv[1], "-s"))
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silent_on_nonexisting_files = silent = 1;
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else if (!strcmp(argv[1], "-q"))
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silent_on_nonexisting_files = 1;
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else if (!strcmp(argv[1], "-z"))
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machine_readable = 1;
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else
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usage(show_diff_usage);
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argv++; argc--;
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}
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/* At this point, if argc == 1, then we are doing everything.
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* Otherwise argv[1] .. argv[argc-1] have the explicit paths.
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*/
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if (entries < 0) {
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perror("read_cache");
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exit(1);
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}
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for (i = 0; i < entries; i++) {
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struct stat st;
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struct cache_entry *ce = active_cache[i];
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int changed;
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if (1 < argc &&
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! matches_pathspec(ce, argv+1, argc-1))
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continue;
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if (ce_stage(ce)) {
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if (machine_readable)
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printf("U %s%c", ce->name, 0);
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else
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printf("%s: Unmerged\n",
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ce->name);
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while (i < entries &&
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!strcmp(ce->name, active_cache[i]->name))
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i++;
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i--; /* compensate for loop control increments */
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continue;
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}
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if (stat(ce->name, &st) < 0) {
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if (errno == ENOENT && silent_on_nonexisting_files)
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continue;
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if (machine_readable)
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printf("X %s%c", ce->name, 0);
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else {
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printf("%s: %s\n", ce->name, strerror(errno));
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if (errno == ENOENT)
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show_diff_empty(ce, reverse);
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}
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continue;
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}
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changed = cache_match_stat(ce, &st);
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if (!changed)
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continue;
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if (!machine_readable)
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printf("%s: %s\n", ce->name, sha1_to_hex(ce->sha1));
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else {
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printf("%s %s%c", sha1_to_hex(ce->sha1), ce->name, 0);
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continue;
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}
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if (silent)
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continue;
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show_differences(ce, reverse);
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}
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return 0;
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}
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