aboutsummaryrefslogtreecommitdiff
path: root/diff-files.c
blob: 17899390b80f4bfc03718e92029b5c4de65055b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
/*
 * GIT - The information manager from hell
 *
 * Copyright (C) Linus Torvalds, 2005
 */
#include "cache.h"
#include "diff.h"

static const char diff_files_usage[] =
"git-diff-files [-q] "
"[<common diff options>] [<path>...]"
COMMON_DIFF_OPTIONS_HELP;

static struct diff_options diff_options;
static int silent = 0;

static void show_unmerge(const char *path)
{
	diff_unmerge(&diff_options, path);
}

static void show_file(int pfx, struct cache_entry *ce)
{
	diff_addremove(&diff_options, pfx, ntohl(ce->ce_mode),
		       ce->sha1, ce->name, NULL);
}

static void show_modified(int oldmode, int mode,
			  const unsigned char *old_sha1, const unsigned char *sha1,
			  char *path)
{
	diff_change(&diff_options, oldmode, mode, old_sha1, sha1, path, NULL);
}

int main(int argc, const char **argv)
{
	const char **pathspec;
	const char *prefix = setup_git_directory();
	int entries, i;

	git_config(git_default_config);
	diff_setup(&diff_options);
	while (1 < argc && argv[1][0] == '-') {
		if (!strcmp(argv[1], "--")) {
			argv++;
			argc--;
			break;
		}
		if (!strcmp(argv[1], "-q"))
			silent = 1;
		else if (!strcmp(argv[1], "-r"))
			; /* no-op */
		else if (!strcmp(argv[1], "-s"))
			; /* no-op */
		else {
			int diff_opt_cnt;
			diff_opt_cnt = diff_opt_parse(&diff_options,
						      argv+1, argc-1);
			if (diff_opt_cnt < 0)
				usage(diff_files_usage);
			else if (diff_opt_cnt) {
				argv += diff_opt_cnt;
				argc -= diff_opt_cnt;
				continue;
			}
			else
				usage(diff_files_usage);
		}
		argv++; argc--;
	}

	/* Find the directory, and set up the pathspec */
	pathspec = get_pathspec(prefix, argv + 1);
	entries = read_cache();

	if (diff_setup_done(&diff_options) < 0)
		usage(diff_files_usage);

	/* At this point, if argc == 1, then we are doing everything.
	 * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
	 */
	if (entries < 0) {
		perror("read_cache");
		exit(1);
	}

	for (i = 0; i < entries; i++) {
		struct stat st;
		unsigned int oldmode, newmode;
		struct cache_entry *ce = active_cache[i];
		int changed;

		if (!ce_path_match(ce, pathspec))
			continue;

		if (ce_stage(ce)) {
			show_unmerge(ce->name);
			while (i < entries &&
			       !strcmp(ce->name, active_cache[i]->name))
				i++;
			i--; /* compensate for loop control increments */
			continue;
		}

		if (lstat(ce->name, &st) < 0) {
			if (errno != ENOENT && errno != ENOTDIR) {
				perror(ce->name);
				continue;
			}
			if (silent)
				continue;
			show_file('-', ce);
			continue;
		}
		changed = ce_match_stat(ce, &st);
		if (!changed && !diff_options.find_copies_harder)
			continue;
		oldmode = ntohl(ce->ce_mode);

		newmode = DIFF_FILE_CANON_MODE(st.st_mode);
		if (!trust_executable_bit &&
		    S_ISREG(newmode) && S_ISREG(oldmode) &&
		    ((newmode ^ oldmode) == 0111))
			newmode = oldmode;
		show_modified(oldmode, newmode,
			      ce->sha1, (changed ? null_sha1 : ce->sha1),
			      ce->name);
	}
	diffcore_std(&diff_options);
	diff_flush(&diff_options);
	return 0;
}