lockfile.h: extract new header file for the functions in lockfile.c
[git/git.git] / builtin / checkout-index.c
1 /*
2 * Check-out files from the "current cache directory"
3 *
4 * Copyright (C) 2005 Linus Torvalds
5 *
6 */
7 #include "builtin.h"
8 #include "lockfile.h"
9 #include "quote.h"
10 #include "cache-tree.h"
11 #include "parse-options.h"
12
13 #define CHECKOUT_ALL 4
14 static int line_termination = '\n';
15 static int checkout_stage; /* default to checkout stage0 */
16 static int to_tempfile;
17 static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
18
19 static struct checkout state;
20
21 static void write_tempfile_record(const char *name, int prefix_length)
22 {
23 int i;
24
25 if (CHECKOUT_ALL == checkout_stage) {
26 for (i = 1; i < 4; i++) {
27 if (i > 1)
28 putchar(' ');
29 if (topath[i][0])
30 fputs(topath[i], stdout);
31 else
32 putchar('.');
33 }
34 } else
35 fputs(topath[checkout_stage], stdout);
36
37 putchar('\t');
38 write_name_quoted(name + prefix_length, stdout, line_termination);
39
40 for (i = 0; i < 4; i++) {
41 topath[i][0] = 0;
42 }
43 }
44
45 static int checkout_file(const char *name, int prefix_length)
46 {
47 int namelen = strlen(name);
48 int pos = cache_name_pos(name, namelen);
49 int has_same_name = 0;
50 int did_checkout = 0;
51 int errs = 0;
52
53 if (pos < 0)
54 pos = -pos - 1;
55
56 while (pos < active_nr) {
57 struct cache_entry *ce = active_cache[pos];
58 if (ce_namelen(ce) != namelen ||
59 memcmp(ce->name, name, namelen))
60 break;
61 has_same_name = 1;
62 pos++;
63 if (ce_stage(ce) != checkout_stage
64 && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
65 continue;
66 did_checkout = 1;
67 if (checkout_entry(ce, &state,
68 to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
69 errs++;
70 }
71
72 if (did_checkout) {
73 if (to_tempfile)
74 write_tempfile_record(name, prefix_length);
75 return errs > 0 ? -1 : 0;
76 }
77
78 if (!state.quiet) {
79 fprintf(stderr, "git checkout-index: %s ", name);
80 if (!has_same_name)
81 fprintf(stderr, "is not in the cache");
82 else if (checkout_stage)
83 fprintf(stderr, "does not exist at stage %d",
84 checkout_stage);
85 else
86 fprintf(stderr, "is unmerged");
87 fputc('\n', stderr);
88 }
89 return -1;
90 }
91
92 static void checkout_all(const char *prefix, int prefix_length)
93 {
94 int i, errs = 0;
95 struct cache_entry *last_ce = NULL;
96
97 for (i = 0; i < active_nr ; i++) {
98 struct cache_entry *ce = active_cache[i];
99 if (ce_stage(ce) != checkout_stage
100 && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
101 continue;
102 if (prefix && *prefix &&
103 (ce_namelen(ce) <= prefix_length ||
104 memcmp(prefix, ce->name, prefix_length)))
105 continue;
106 if (last_ce && to_tempfile) {
107 if (ce_namelen(last_ce) != ce_namelen(ce)
108 || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
109 write_tempfile_record(last_ce->name, prefix_length);
110 }
111 if (checkout_entry(ce, &state,
112 to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
113 errs++;
114 last_ce = ce;
115 }
116 if (last_ce && to_tempfile)
117 write_tempfile_record(last_ce->name, prefix_length);
118 if (errs)
119 /* we have already done our error reporting.
120 * exit with the same code as die().
121 */
122 exit(128);
123 }
124
125 static const char * const builtin_checkout_index_usage[] = {
126 N_("git checkout-index [options] [--] [<file>...]"),
127 NULL
128 };
129
130 static struct lock_file lock_file;
131
132 static int option_parse_u(const struct option *opt,
133 const char *arg, int unset)
134 {
135 int *newfd = opt->value;
136
137 state.refresh_cache = 1;
138 state.istate = &the_index;
139 if (*newfd < 0)
140 *newfd = hold_locked_index(&lock_file, 1);
141 return 0;
142 }
143
144 static int option_parse_z(const struct option *opt,
145 const char *arg, int unset)
146 {
147 if (unset)
148 line_termination = '\n';
149 else
150 line_termination = 0;
151 return 0;
152 }
153
154 static int option_parse_prefix(const struct option *opt,
155 const char *arg, int unset)
156 {
157 state.base_dir = arg;
158 state.base_dir_len = strlen(arg);
159 return 0;
160 }
161
162 static int option_parse_stage(const struct option *opt,
163 const char *arg, int unset)
164 {
165 if (!strcmp(arg, "all")) {
166 to_tempfile = 1;
167 checkout_stage = CHECKOUT_ALL;
168 } else {
169 int ch = arg[0];
170 if ('1' <= ch && ch <= '3')
171 checkout_stage = arg[0] - '0';
172 else
173 die("stage should be between 1 and 3 or all");
174 }
175 return 0;
176 }
177
178 int cmd_checkout_index(int argc, const char **argv, const char *prefix)
179 {
180 int i;
181 int newfd = -1;
182 int all = 0;
183 int read_from_stdin = 0;
184 int prefix_length;
185 int force = 0, quiet = 0, not_new = 0;
186 struct option builtin_checkout_index_options[] = {
187 OPT_BOOL('a', "all", &all,
188 N_("check out all files in the index")),
189 OPT__FORCE(&force, N_("force overwrite of existing files")),
190 OPT__QUIET(&quiet,
191 N_("no warning for existing files and files not in index")),
192 OPT_BOOL('n', "no-create", &not_new,
193 N_("don't checkout new files")),
194 { OPTION_CALLBACK, 'u', "index", &newfd, NULL,
195 N_("update stat information in the index file"),
196 PARSE_OPT_NOARG, option_parse_u },
197 { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
198 N_("paths are separated with NUL character"),
199 PARSE_OPT_NOARG, option_parse_z },
200 OPT_BOOL(0, "stdin", &read_from_stdin,
201 N_("read list of paths from the standard input")),
202 OPT_BOOL(0, "temp", &to_tempfile,
203 N_("write the content to temporary files")),
204 OPT_CALLBACK(0, "prefix", NULL, N_("string"),
205 N_("when creating files, prepend <string>"),
206 option_parse_prefix),
207 OPT_CALLBACK(0, "stage", NULL, NULL,
208 N_("copy out the files from named stage"),
209 option_parse_stage),
210 OPT_END()
211 };
212
213 if (argc == 2 && !strcmp(argv[1], "-h"))
214 usage_with_options(builtin_checkout_index_usage,
215 builtin_checkout_index_options);
216 git_config(git_default_config, NULL);
217 state.base_dir = "";
218 prefix_length = prefix ? strlen(prefix) : 0;
219
220 if (read_cache() < 0) {
221 die("invalid cache");
222 }
223
224 argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
225 builtin_checkout_index_usage, 0);
226 state.force = force;
227 state.quiet = quiet;
228 state.not_new = not_new;
229
230 if (state.base_dir_len || to_tempfile) {
231 /* when --prefix is specified we do not
232 * want to update cache.
233 */
234 if (state.refresh_cache) {
235 rollback_lock_file(&lock_file);
236 newfd = -1;
237 }
238 state.refresh_cache = 0;
239 }
240
241 /* Check out named files first */
242 for (i = 0; i < argc; i++) {
243 const char *arg = argv[i];
244 const char *p;
245
246 if (all)
247 die("git checkout-index: don't mix '--all' and explicit filenames");
248 if (read_from_stdin)
249 die("git checkout-index: don't mix '--stdin' and explicit filenames");
250 p = prefix_path(prefix, prefix_length, arg);
251 checkout_file(p, prefix_length);
252 if (p < arg || p > arg + strlen(arg))
253 free((char *)p);
254 }
255
256 if (read_from_stdin) {
257 struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
258
259 if (all)
260 die("git checkout-index: don't mix '--all' and '--stdin'");
261
262 while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
263 const char *p;
264 if (line_termination && buf.buf[0] == '"') {
265 strbuf_reset(&nbuf);
266 if (unquote_c_style(&nbuf, buf.buf, NULL))
267 die("line is badly quoted");
268 strbuf_swap(&buf, &nbuf);
269 }
270 p = prefix_path(prefix, prefix_length, buf.buf);
271 checkout_file(p, prefix_length);
272 if (p < buf.buf || p > buf.buf + buf.len)
273 free((char *)p);
274 }
275 strbuf_release(&nbuf);
276 strbuf_release(&buf);
277 }
278
279 if (all)
280 checkout_all(prefix, prefix_length);
281
282 if (0 <= newfd &&
283 write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
284 die("Unable to write new index file");
285 return 0;
286 }