Merge branch 'jt/fetch-pack-v2'
[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 "config.h"
9 #include "lockfile.h"
10 #include "quote.h"
11 #include "cache-tree.h"
12 #include "parse-options.h"
13
14 #define CHECKOUT_ALL 4
15 static int nul_term_line;
16 static int checkout_stage; /* default to checkout stage0 */
17 static int to_tempfile;
18 static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
19
20 static struct checkout state = CHECKOUT_INIT;
21
22 static void write_tempfile_record(const char *name, const char *prefix)
23 {
24         int i;
25
26         if (CHECKOUT_ALL == checkout_stage) {
27                 for (i = 1; i < 4; i++) {
28                         if (i > 1)
29                                 putchar(' ');
30                         if (topath[i][0])
31                                 fputs(topath[i], stdout);
32                         else
33                                 putchar('.');
34                 }
35         } else
36                 fputs(topath[checkout_stage], stdout);
37
38         putchar('\t');
39         write_name_quoted_relative(name, prefix, stdout,
40                                    nul_term_line ? '\0' : '\n');
41
42         for (i = 0; i < 4; i++) {
43                 topath[i][0] = 0;
44         }
45 }
46
47 static int checkout_file(const char *name, const char *prefix)
48 {
49         int namelen = strlen(name);
50         int pos = cache_name_pos(name, namelen);
51         int has_same_name = 0;
52         int did_checkout = 0;
53         int errs = 0;
54
55         if (pos < 0)
56                 pos = -pos - 1;
57
58         while (pos < active_nr) {
59                 struct cache_entry *ce = active_cache[pos];
60                 if (ce_namelen(ce) != namelen ||
61                     memcmp(ce->name, name, namelen))
62                         break;
63                 has_same_name = 1;
64                 pos++;
65                 if (ce_stage(ce) != checkout_stage
66                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
67                         continue;
68                 did_checkout = 1;
69                 if (checkout_entry(ce, &state,
70                                    to_tempfile ? topath[ce_stage(ce)] : NULL,
71                                    NULL) < 0)
72                         errs++;
73         }
74
75         if (did_checkout) {
76                 if (to_tempfile)
77                         write_tempfile_record(name, prefix);
78                 return errs > 0 ? -1 : 0;
79         }
80
81         if (!state.quiet) {
82                 fprintf(stderr, "git checkout-index: %s ", name);
83                 if (!has_same_name)
84                         fprintf(stderr, "is not in the cache");
85                 else if (checkout_stage)
86                         fprintf(stderr, "does not exist at stage %d",
87                                 checkout_stage);
88                 else
89                         fprintf(stderr, "is unmerged");
90                 fputc('\n', stderr);
91         }
92         return -1;
93 }
94
95 static void checkout_all(const char *prefix, int prefix_length)
96 {
97         int i, errs = 0;
98         struct cache_entry *last_ce = NULL;
99
100         for (i = 0; i < active_nr ; i++) {
101                 struct cache_entry *ce = active_cache[i];
102                 if (ce_stage(ce) != checkout_stage
103                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
104                         continue;
105                 if (prefix && *prefix &&
106                     (ce_namelen(ce) <= prefix_length ||
107                      memcmp(prefix, ce->name, prefix_length)))
108                         continue;
109                 if (last_ce && to_tempfile) {
110                         if (ce_namelen(last_ce) != ce_namelen(ce)
111                             || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
112                                 write_tempfile_record(last_ce->name, prefix);
113                 }
114                 if (checkout_entry(ce, &state,
115                                    to_tempfile ? topath[ce_stage(ce)] : NULL,
116                                    NULL) < 0)
117                         errs++;
118                 last_ce = ce;
119         }
120         if (last_ce && to_tempfile)
121                 write_tempfile_record(last_ce->name, prefix);
122         if (errs)
123                 /* we have already done our error reporting.
124                  * exit with the same code as die().
125                  */
126                 exit(128);
127 }
128
129 static const char * const builtin_checkout_index_usage[] = {
130         N_("git checkout-index [<options>] [--] [<file>...]"),
131         NULL
132 };
133
134 static int option_parse_stage(const struct option *opt,
135                               const char *arg, int unset)
136 {
137         BUG_ON_OPT_NEG(unset);
138
139         if (!strcmp(arg, "all")) {
140                 to_tempfile = 1;
141                 checkout_stage = CHECKOUT_ALL;
142         } else {
143                 int ch = arg[0];
144                 if ('1' <= ch && ch <= '3')
145                         checkout_stage = arg[0] - '0';
146                 else
147                         die(_("stage should be between 1 and 3 or all"));
148         }
149         return 0;
150 }
151
152 int cmd_checkout_index(int argc, const char **argv, const char *prefix)
153 {
154         int i;
155         struct lock_file lock_file = LOCK_INIT;
156         int all = 0;
157         int read_from_stdin = 0;
158         int prefix_length;
159         int force = 0, quiet = 0, not_new = 0;
160         int index_opt = 0;
161         struct option builtin_checkout_index_options[] = {
162                 OPT_BOOL('a', "all", &all,
163                         N_("check out all files in the index")),
164                 OPT__FORCE(&force, N_("force overwrite of existing files"), 0),
165                 OPT__QUIET(&quiet,
166                         N_("no warning for existing files and files not in index")),
167                 OPT_BOOL('n', "no-create", &not_new,
168                         N_("don't checkout new files")),
169                 OPT_BOOL('u', "index", &index_opt,
170                          N_("update stat information in the index file")),
171                 OPT_BOOL('z', NULL, &nul_term_line,
172                         N_("paths are separated with NUL character")),
173                 OPT_BOOL(0, "stdin", &read_from_stdin,
174                         N_("read list of paths from the standard input")),
175                 OPT_BOOL(0, "temp", &to_tempfile,
176                         N_("write the content to temporary files")),
177                 OPT_STRING(0, "prefix", &state.base_dir, N_("string"),
178                         N_("when creating files, prepend <string>")),
179                 { OPTION_CALLBACK, 0, "stage", NULL, "(1|2|3|all)",
180                         N_("copy out the files from named stage"),
181                         PARSE_OPT_NONEG, option_parse_stage },
182                 OPT_END()
183         };
184
185         if (argc == 2 && !strcmp(argv[1], "-h"))
186                 usage_with_options(builtin_checkout_index_usage,
187                                    builtin_checkout_index_options);
188         git_config(git_default_config, NULL);
189         prefix_length = prefix ? strlen(prefix) : 0;
190
191         if (read_cache() < 0) {
192                 die("invalid cache");
193         }
194
195         argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
196                         builtin_checkout_index_usage, 0);
197         state.istate = &the_index;
198         state.force = force;
199         state.quiet = quiet;
200         state.not_new = not_new;
201
202         if (!state.base_dir)
203                 state.base_dir = "";
204         state.base_dir_len = strlen(state.base_dir);
205
206         /*
207          * when --prefix is specified we do not want to update cache.
208          */
209         if (index_opt && !state.base_dir_len && !to_tempfile) {
210                 state.refresh_cache = 1;
211                 state.istate = &the_index;
212                 hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
213         }
214
215         /* Check out named files first */
216         for (i = 0; i < argc; i++) {
217                 const char *arg = argv[i];
218                 char *p;
219
220                 if (all)
221                         die("git checkout-index: don't mix '--all' and explicit filenames");
222                 if (read_from_stdin)
223                         die("git checkout-index: don't mix '--stdin' and explicit filenames");
224                 p = prefix_path(prefix, prefix_length, arg);
225                 checkout_file(p, prefix);
226                 free(p);
227         }
228
229         if (read_from_stdin) {
230                 struct strbuf buf = STRBUF_INIT;
231                 struct strbuf unquoted = STRBUF_INIT;
232                 strbuf_getline_fn getline_fn;
233
234                 if (all)
235                         die("git checkout-index: don't mix '--all' and '--stdin'");
236
237                 getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
238                 while (getline_fn(&buf, stdin) != EOF) {
239                         char *p;
240                         if (!nul_term_line && buf.buf[0] == '"') {
241                                 strbuf_reset(&unquoted);
242                                 if (unquote_c_style(&unquoted, buf.buf, NULL))
243                                         die("line is badly quoted");
244                                 strbuf_swap(&buf, &unquoted);
245                         }
246                         p = prefix_path(prefix, prefix_length, buf.buf);
247                         checkout_file(p, prefix);
248                         free(p);
249                 }
250                 strbuf_release(&unquoted);
251                 strbuf_release(&buf);
252         }
253
254         if (all)
255                 checkout_all(prefix, prefix_length);
256
257         if (is_lock_file_locked(&lock_file) &&
258             write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
259                 die("Unable to write new index file");
260         return 0;
261 }