summaryrefslogtreecommitdiff
path: root/builtin/check-ignore.c
blob: dc8d97c56c60991ec5c1b5cc9eb6e20a76e5e405 (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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
#include "builtin.h"
#include "cache.h"
#include "dir.h"
#include "quote.h"
#include "pathspec.h"
#include "parse-options.h"

static int quiet, verbose, stdin_paths, show_non_matching, no_index;
static const char * const check_ignore_usage[] = {
"git check-ignore [<options>] <pathname>...",
"git check-ignore [<options>] --stdin < <list-of-paths>",
NULL
};

static int nul_term_line;

static const struct option check_ignore_options[] = {
	OPT__QUIET(&quiet, N_("suppress progress reporting")),
	OPT__VERBOSE(&verbose, N_("be verbose")),
	OPT_GROUP(""),
	OPT_BOOL(0, "stdin", &stdin_paths,
		 N_("read file names from stdin")),
	OPT_BOOL('z', NULL, &nul_term_line,
		 N_("terminate input and output records by a NUL character")),
	OPT_BOOL('n', "non-matching", &show_non_matching,
		 N_("show non-matching input paths")),
	OPT_BOOL(0, "no-index", &no_index,
		 N_("ignore index when checking")),
	OPT_END()
};

static void output_exclude(const char *path, struct exclude *exclude)
{
	char *bang  = (exclude && exclude->flags & EXC_FLAG_NEGATIVE)  ? "!" : "";
	char *slash = (exclude && exclude->flags & EXC_FLAG_MUSTBEDIR) ? "/" : "";
	if (!nul_term_line) {
		if (!verbose) {
			write_name_quoted(path, stdout, '\n');
		} else {
			if (exclude) {
				quote_c_style(exclude->el->src, NULL, stdout, 0);
				printf(":%d:%s%s%s\t",
				       exclude->srcpos,
				       bang, exclude->pattern, slash);
			}
			else {
				printf("::\t");
			}
			quote_c_style(path, NULL, stdout, 0);
			fputc('\n', stdout);
		}
	} else {
		if (!verbose) {
			printf("%s%c", path, '\0');
		} else {
			if (exclude)
				printf("%s%c%d%c%s%s%s%c%s%c",
				       exclude->el->src, '\0',
				       exclude->srcpos, '\0',
				       bang, exclude->pattern, slash, '\0',
				       path, '\0');
			else
				printf("%c%c%c%s%c", '\0', '\0', '\0', path, '\0');
		}
	}
}

static int check_ignore(struct dir_struct *dir,
			const char *prefix, int argc, const char **argv)
{
	const char *full_path;
	char *seen;
	int num_ignored = 0, dtype = DT_UNKNOWN, i;
	struct exclude *exclude;
	struct pathspec pathspec;

	if (!argc) {
		if (!quiet)
			fprintf(stderr, "no pathspec given.\n");
		return 0;
	}

	/*
	 * check-ignore just needs paths. Magic beyond :/ is really
	 * irrelevant.
	 */
	parse_pathspec(&pathspec,
		       PATHSPEC_ALL_MAGIC & ~PATHSPEC_FROMTOP,
		       PATHSPEC_SYMLINK_LEADING_PATH |
		       PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE |
		       PATHSPEC_KEEP_ORDER,
		       prefix, argv);

	/*
	 * look for pathspecs matching entries in the index, since these
	 * should not be ignored, in order to be consistent with
	 * 'git status', 'git add' etc.
	 */
	seen = find_pathspecs_matching_against_index(&pathspec);
	for (i = 0; i < pathspec.nr; i++) {
		full_path = pathspec.items[i].match;
		exclude = NULL;
		if (!seen[i]) {
			exclude = last_exclude_matching(dir, full_path, &dtype);
		}
		if (!quiet && (exclude || show_non_matching))
			output_exclude(pathspec.items[i].original, exclude);
		if (exclude)
			num_ignored++;
	}
	free(seen);

	return num_ignored;
}

static int check_ignore_stdin_paths(struct dir_struct *dir, const char *prefix)
{
	struct strbuf buf, nbuf;
	char *pathspec[2] = { NULL, NULL };
	int line_termination = nul_term_line ? 0 : '\n';
	int num_ignored = 0;

	strbuf_init(&buf, 0);
	strbuf_init(&nbuf, 0);
	while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
		if (line_termination && buf.buf[0] == '"') {
			strbuf_reset(&nbuf);
			if (unquote_c_style(&nbuf, buf.buf, NULL))
				die("line is badly quoted");
			strbuf_swap(&buf, &nbuf);
		}
		pathspec[0] = buf.buf;
		num_ignored += check_ignore(dir, prefix,
					    1, (const char **)pathspec);
		maybe_flush_or_die(stdout, "check-ignore to stdout");
	}
	strbuf_release(&buf);
	strbuf_release(&nbuf);
	return num_ignored;
}

int cmd_check_ignore(int argc, const char **argv, const char *prefix)
{
	int num_ignored;
	struct dir_struct dir;

	git_config(git_default_config, NULL);

	argc = parse_options(argc, argv, prefix, check_ignore_options,
			     check_ignore_usage, 0);

	if (stdin_paths) {
		if (argc > 0)
			die(_("cannot specify pathnames with --stdin"));
	} else {
		if (nul_term_line)
			die(_("-z only makes sense with --stdin"));
		if (argc == 0)
			die(_("no path specified"));
	}
	if (quiet) {
		if (argc > 1)
			die(_("--quiet is only valid with a single pathname"));
		if (verbose)
			die(_("cannot have both --quiet and --verbose"));
	}
	if (show_non_matching && !verbose)
		die(_("--non-matching is only valid with --verbose"));

	/* read_cache() is only necessary so we can watch out for submodules. */
	if (!no_index && read_cache() < 0)
		die(_("index file corrupt"));

	memset(&dir, 0, sizeof(dir));
	setup_standard_excludes(&dir);

	if (stdin_paths) {
		num_ignored = check_ignore_stdin_paths(&dir, prefix);
	} else {
		num_ignored = check_ignore(&dir, prefix, argc, argv);
		maybe_flush_or_die(stdout, "ignore to stdout");
	}

	clear_directory(&dir);

	return !num_ignored;
}