aboutsummaryrefslogtreecommitdiff
path: root/builtin/checkout-index.c
blob: 30a49d9f424c0a1e04b321b5eb0a5e25462a53af (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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
/*
 * Check-out files from the "current cache directory"
 *
 * Copyright (C) 2005 Linus Torvalds
 *
 */
#include "builtin.h"
#include "lockfile.h"
#include "quote.h"
#include "cache-tree.h"
#include "parse-options.h"

#define CHECKOUT_ALL 4
static int nul_term_line;
static int checkout_stage; /* default to checkout stage0 */
static int to_tempfile;
static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];

static struct checkout state = CHECKOUT_INIT;

static void write_tempfile_record(const char *name, const char *prefix)
{
	int i;

	if (CHECKOUT_ALL == checkout_stage) {
		for (i = 1; i < 4; i++) {
			if (i > 1)
				putchar(' ');
			if (topath[i][0])
				fputs(topath[i], stdout);
			else
				putchar('.');
		}
	} else
		fputs(topath[checkout_stage], stdout);

	putchar('\t');
	write_name_quoted_relative(name, prefix, stdout,
				   nul_term_line ? '\0' : '\n');

	for (i = 0; i < 4; i++) {
		topath[i][0] = 0;
	}
}

static int checkout_file(const char *name, const char *prefix)
{
	int namelen = strlen(name);
	int pos = cache_name_pos(name, namelen);
	int has_same_name = 0;
	int did_checkout = 0;
	int errs = 0;

	if (pos < 0)
		pos = -pos - 1;

	while (pos < active_nr) {
		struct cache_entry *ce = active_cache[pos];
		if (ce_namelen(ce) != namelen ||
		    memcmp(ce->name, name, namelen))
			break;
		has_same_name = 1;
		pos++;
		if (ce_stage(ce) != checkout_stage
		    && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
			continue;
		did_checkout = 1;
		if (checkout_entry(ce, &state,
		    to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
			errs++;
	}

	if (did_checkout) {
		if (to_tempfile)
			write_tempfile_record(name, prefix);
		return errs > 0 ? -1 : 0;
	}

	if (!state.quiet) {
		fprintf(stderr, "git checkout-index: %s ", name);
		if (!has_same_name)
			fprintf(stderr, "is not in the cache");
		else if (checkout_stage)
			fprintf(stderr, "does not exist at stage %d",
				checkout_stage);
		else
			fprintf(stderr, "is unmerged");
		fputc('\n', stderr);
	}
	return -1;
}

static void checkout_all(const char *prefix, int prefix_length)
{
	int i, errs = 0;
	struct cache_entry *last_ce = NULL;

	for (i = 0; i < active_nr ; i++) {
		struct cache_entry *ce = active_cache[i];
		if (ce_stage(ce) != checkout_stage
		    && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
			continue;
		if (prefix && *prefix &&
		    (ce_namelen(ce) <= prefix_length ||
		     memcmp(prefix, ce->name, prefix_length)))
			continue;
		if (last_ce && to_tempfile) {
			if (ce_namelen(last_ce) != ce_namelen(ce)
			    || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
				write_tempfile_record(last_ce->name, prefix);
		}
		if (checkout_entry(ce, &state,
		    to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
			errs++;
		last_ce = ce;
	}
	if (last_ce && to_tempfile)
		write_tempfile_record(last_ce->name, prefix);
	if (errs)
		/* we have already done our error reporting.
		 * exit with the same code as die().
		 */
		exit(128);
}

static const char * const builtin_checkout_index_usage[] = {
	N_("git checkout-index [<options>] [--] [<file>...]"),
	NULL
};

static struct lock_file lock_file;

static int option_parse_stage(const struct option *opt,
			      const char *arg, int unset)
{
	if (!strcmp(arg, "all")) {
		to_tempfile = 1;
		checkout_stage = CHECKOUT_ALL;
	} else {
		int ch = arg[0];
		if ('1' <= ch && ch <= '3')
			checkout_stage = arg[0] - '0';
		else
			die(_("stage should be between 1 and 3 or all"));
	}
	return 0;
}

int cmd_checkout_index(int argc, const char **argv, const char *prefix)
{
	int i;
	int newfd = -1;
	int all = 0;
	int read_from_stdin = 0;
	int prefix_length;
	int force = 0, quiet = 0, not_new = 0;
	int index_opt = 0;
	struct option builtin_checkout_index_options[] = {
		OPT_BOOL('a', "all", &all,
			N_("check out all files in the index")),
		OPT__FORCE(&force, N_("force overwrite of existing files")),
		OPT__QUIET(&quiet,
			N_("no warning for existing files and files not in index")),
		OPT_BOOL('n', "no-create", &not_new,
			N_("don't checkout new files")),
		OPT_BOOL('u', "index", &index_opt,
			 N_("update stat information in the index file")),
		OPT_BOOL('z', NULL, &nul_term_line,
			N_("paths are separated with NUL character")),
		OPT_BOOL(0, "stdin", &read_from_stdin,
			N_("read list of paths from the standard input")),
		OPT_BOOL(0, "temp", &to_tempfile,
			N_("write the content to temporary files")),
		OPT_STRING(0, "prefix", &state.base_dir, N_("string"),
			N_("when creating files, prepend <string>")),
		{ OPTION_CALLBACK, 0, "stage", NULL, "1-3|all",
			N_("copy out the files from named stage"),
			PARSE_OPT_NONEG, option_parse_stage },
		OPT_END()
	};

	if (argc == 2 && !strcmp(argv[1], "-h"))
		usage_with_options(builtin_checkout_index_usage,
				   builtin_checkout_index_options);
	git_config(git_default_config, NULL);
	prefix_length = prefix ? strlen(prefix) : 0;

	if (read_cache() < 0) {
		die("invalid cache");
	}

	argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
			builtin_checkout_index_usage, 0);
	state.force = force;
	state.quiet = quiet;
	state.not_new = not_new;

	if (!state.base_dir)
		state.base_dir = "";
	state.base_dir_len = strlen(state.base_dir);

	/*
	 * when --prefix is specified we do not want to update cache.
	 */
	if (index_opt && !state.base_dir_len && !to_tempfile) {
		state.refresh_cache = 1;
		state.istate = &the_index;
		newfd = hold_locked_index(&lock_file, 1);
	}

	/* Check out named files first */
	for (i = 0; i < argc; i++) {
		const char *arg = argv[i];
		char *p;

		if (all)
			die("git checkout-index: don't mix '--all' and explicit filenames");
		if (read_from_stdin)
			die("git checkout-index: don't mix '--stdin' and explicit filenames");
		p = prefix_path(prefix, prefix_length, arg);
		checkout_file(p, prefix);
		free(p);
	}

	if (read_from_stdin) {
		struct strbuf buf = STRBUF_INIT;
		struct strbuf unquoted = STRBUF_INIT;
		strbuf_getline_fn getline_fn;

		if (all)
			die("git checkout-index: don't mix '--all' and '--stdin'");

		getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
		while (getline_fn(&buf, stdin) != EOF) {
			char *p;
			if (!nul_term_line && buf.buf[0] == '"') {
				strbuf_reset(&unquoted);
				if (unquote_c_style(&unquoted, buf.buf, NULL))
					die("line is badly quoted");
				strbuf_swap(&buf, &unquoted);
			}
			p = prefix_path(prefix, prefix_length, buf.buf);
			checkout_file(p, prefix);
			free(p);
		}
		strbuf_release(&unquoted);
		strbuf_release(&buf);
	}

	if (all)
		checkout_all(prefix, prefix_length);

	if (0 <= newfd &&
	    write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
		die("Unable to write new index file");
	return 0;
}