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4727f64003
Like diff-tree, this patch makes -C option for diff-* brothers to use only pre-image of modified files as rename/copy detection by default. Give --find-copies-harder to use unmodified files to find copies from as well. This also fixes "diff-files -C" problem earlier noticed by Linus. It was feeding the null sha1 even when the file in the work tree was known to match what is in the index file. This resulted in diff-files showing everything in the project. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
/*
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* Copyright (c) 2005 Junio C Hamano
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*/
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#include "cache.h"
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#include "diff.h"
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static int diff_output_format = DIFF_FORMAT_HUMAN;
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static int detect_rename = 0;
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static int find_copies_harder = 0;
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static int diff_setup_opt = 0;
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static int diff_score_opt = 0;
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static const char *pickaxe = NULL;
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static int pickaxe_opts = 0;
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static int diff_break_opt = -1;
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static const char *orderfile = NULL;
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static const char *diff_filter = NULL;
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static char *diff_stages_usage =
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"git-diff-stages [-p] [-r] [-z] [-R] [-B] [-M] [-C] [--find-copies-harder] [-O<orderfile>] [-S<string>] [--pickaxe-all] <stage1> <stage2> [<path>...]";
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static void diff_stages(int stage1, int stage2)
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{
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int i = 0;
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while (i < active_nr) {
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struct cache_entry *ce, *stages[4] = { NULL, };
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struct cache_entry *one, *two;
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const char *name;
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int len;
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ce = active_cache[i];
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len = ce_namelen(ce);
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name = ce->name;
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for (;;) {
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int stage = ce_stage(ce);
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stages[stage] = ce;
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if (active_nr <= ++i)
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break;
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ce = active_cache[i];
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if (ce_namelen(ce) != len ||
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memcmp(name, ce->name, len))
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break;
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}
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one = stages[stage1];
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two = stages[stage2];
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if (!one && !two)
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continue;
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if (!one)
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diff_addremove('+', ntohl(two->ce_mode),
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two->sha1, name, NULL);
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else if (!two)
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diff_addremove('-', ntohl(one->ce_mode),
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one->sha1, name, NULL);
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else if (memcmp(one->sha1, two->sha1, 20) ||
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(one->ce_mode != two->ce_mode) ||
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find_copies_harder)
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diff_change(ntohl(one->ce_mode), ntohl(two->ce_mode),
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one->sha1, two->sha1, name, NULL);
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}
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}
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int main(int ac, const char **av)
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{
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int stage1, stage2;
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read_cache();
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while (1 < ac && av[1][0] == '-') {
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const char *arg = av[1];
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if (!strcmp(arg, "-r"))
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; /* as usual */
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else if (!strcmp(arg, "-p"))
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diff_output_format = DIFF_FORMAT_PATCH;
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else if (!strncmp(arg, "-B", 2)) {
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if ((diff_break_opt = diff_scoreopt_parse(arg)) == -1)
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usage(diff_stages_usage);
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}
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else if (!strncmp(arg, "-M", 2)) {
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detect_rename = DIFF_DETECT_RENAME;
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if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
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usage(diff_stages_usage);
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}
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else if (!strncmp(arg, "-C", 2)) {
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detect_rename = DIFF_DETECT_COPY;
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if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
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usage(diff_stages_usage);
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}
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else if (!strcmp(arg, "--find-copies-harder"))
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find_copies_harder = 1;
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else if (!strcmp(arg, "-z"))
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diff_output_format = DIFF_FORMAT_MACHINE;
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else if (!strcmp(arg, "-R"))
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diff_setup_opt |= DIFF_SETUP_REVERSE;
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else if (!strncmp(arg, "-S", 2))
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pickaxe = arg + 2;
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else if (!strncmp(arg, "-O", 2))
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orderfile = arg + 2;
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else if (!strncmp(arg, "--diff-filter=", 14))
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diff_filter = arg + 14;
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else if (!strcmp(arg, "--pickaxe-all"))
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pickaxe_opts = DIFF_PICKAXE_ALL;
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else
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usage(diff_stages_usage);
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ac--; av++;
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}
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if (ac < 3 ||
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sscanf(av[1], "%d", &stage1) != 1 ||
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! (0 <= stage1 && stage1 <= 3) ||
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sscanf(av[2], "%d", &stage2) != 1 ||
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! (0 <= stage2 && stage2 <= 3) ||
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find_copies_harder && detect_rename != DIFF_DETECT_COPY)
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usage(diff_stages_usage);
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av += 3; /* The rest from av[0] are for paths restriction. */
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diff_setup(diff_setup_opt);
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diff_stages(stage1, stage2);
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diffcore_std(av,
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detect_rename, diff_score_opt,
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pickaxe, pickaxe_opts,
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diff_break_opt,
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orderfile,
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diff_filter);
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diff_flush(diff_output_format);
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return 0;
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}
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