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