builtin-push.c

   1 /*
   2  * "git push"
   3  */
   4 #include "cache.h"
   5 #include "refs.h"
   6 #include "run-command.h"
   7 #include "builtin.h"
   8
   9 #define MAX_URI (16)
  10
  11 static const char push_usage[] = "git-push [--all] [--tags] [-f | --force] <repository> [<refspec>...]";
  12
  13 static int all, tags, force, thin = 1, verbose;
  14 static const char *execute;
  15
  16 #define BUF_SIZE (2084)
  17 static char buffer[BUF_SIZE];
  18
  19 static const char **refspec;
  20 static int refspec_nr;
  21
  22 static void add_refspec(const char *ref)
  23 {
  24         int nr = refspec_nr + 1;
  25         refspec = xrealloc(refspec, nr * sizeof(char *));
  26         refspec[nr-1] = ref;
  27         refspec_nr = nr;
  28 }
  29
  30 static int expand_one_ref(const char *ref, const unsigned char *sha1, int flag, void *cb_data)
  31 {
  32         /* Ignore the "refs/" at the beginning of the refname */
  33         ref += 5;
  34
  35         if (!strncmp(ref, "tags/", 5))
  36                 add_refspec(xstrdup(ref));
  37         return 0;
  38 }
  39
  40 static void expand_refspecs(void)
  41 {
  42         if (all) {
  43                 if (refspec_nr)
  44                         die("cannot mix '--all' and a refspec");
  45
  46                 /*
  47                  * No need to expand "--all" - we'll just use
  48                  * the "--all" flag to send-pack
  49                  */
  50                 return;
  51         }
  52         if (!tags)
  53                 return;
  54         for_each_ref(expand_one_ref, NULL);
  55 }
  56
  57 static void set_refspecs(const char **refs, int nr)
  58 {
  59         if (nr) {
  60                 int pass;
  61                 for (pass = 0; pass < 2; pass++) {
  62                         /* pass 0 counts and allocates, pass 1 fills */
  63                         int i, cnt;
  64                         for (i = cnt = 0; i < nr; i++) {
  65                                 if (!strcmp("tag", refs[i])) {
  66                                         int len;
  67                                         char *tag;
  68                                         if (nr <= ++i)
  69                                                 die("tag <tag> shorthand without <tag>");
  70                                         if (pass) {
  71                                                 len = strlen(refs[i]) + 11;
  72                                                 tag = xmalloc(len);
  73                                                 strcpy(tag, "refs/tags/");
  74                                                 strcat(tag, refs[i]);
  75                                                 refspec[cnt] = tag;
  76                                         }
  77                                         cnt++;
  78                                         continue;
  79                                 }
  80                                 if (pass)
  81                                         refspec[cnt] = refs[i];
  82                                 cnt++;
  83                         }
  84                         if (!pass) {
  85                                 size_t bytes = cnt * sizeof(char *);
  86                                 refspec_nr = cnt;
  87                                 refspec = xrealloc(refspec, bytes);
  88                         }
  89                 }
  90         }
  91         expand_refspecs();
  92 }
  93
  94 static int get_remotes_uri(const char *repo, const char *uri[MAX_URI])
  95 {
  96         int n = 0;
  97         FILE *f = fopen(git_path("remotes/%s", repo), "r");
  98         int has_explicit_refspec = refspec_nr || all || tags;
  99
 100         if (!f)
 101                 return -1;
 102         while (fgets(buffer, BUF_SIZE, f)) {
 103                 int is_refspec;
 104                 char *s, *p;
 105
 106                 if (!strncmp("URL:", buffer, 4)) {
 107                         is_refspec = 0;
 108                         s = buffer + 4;
 109                 } else if (!strncmp("Push:", buffer, 5)) {
 110                         is_refspec = 1;
 111                         s = buffer + 5;
 112                 } else
 113                         continue;
 114
 115                 /* Remove whitespace at the head.. */
 116                 while (isspace(*s))
 117                         s++;
 118                 if (!*s)
 119                         continue;
 120
 121                 /* ..and at the end */
 122                 p = s + strlen(s);
 123                 while (isspace(p[-1]))
 124                         *--p = 0;
 125
 126                 if (!is_refspec) {
 127                         if (n < MAX_URI)
 128                                 uri[n++] = xstrdup(s);
 129                         else
 130                                 error("more than %d URL's specified, ignoring the rest", MAX_URI);
 131                 }
 132                 else if (is_refspec && !has_explicit_refspec)
 133                         add_refspec(xstrdup(s));
 134         }
 135         fclose(f);
 136         if (!n)
 137                 die("remote '%s' has no URL", repo);
 138         return n;
 139 }
 140
 141 static const char **config_uri;
 142 static const char *config_repo;
 143 static int config_repo_len;
 144 static int config_current_uri;
 145 static int config_get_refspecs;
 146
 147 static int get_remote_config(const char* key, const char* value)
 148 {
 149         if (!strncmp(key, "remote.", 7) &&
 150             !strncmp(key + 7, config_repo, config_repo_len)) {
 151                 if (!strcmp(key + 7 + config_repo_len, ".url")) {
 152                         if (config_current_uri < MAX_URI)
 153                                 config_uri[config_current_uri++] = xstrdup(value);
 154                         else
 155                                 error("more than %d URL's specified, ignoring the rest", MAX_URI);
 156                 }
 157                 else if (config_get_refspecs &&
 158                          !strcmp(key + 7 + config_repo_len, ".push"))
 159                         add_refspec(xstrdup(value));
 160         }
 161         return 0;
 162 }
 163
 164 static int get_config_remotes_uri(const char *repo, const char *uri[MAX_URI])
 165 {
 166         config_repo_len = strlen(repo);
 167         config_repo = repo;
 168         config_current_uri = 0;
 169         config_uri = uri;
 170         config_get_refspecs = !(refspec_nr || all || tags);
 171
 172         git_config(get_remote_config);
 173         return config_current_uri;
 174 }
 175
 176 static int get_branches_uri(const char *repo, const char *uri[MAX_URI])
 177 {
 178         const char *slash = strchr(repo, '/');
 179         int n = slash ? slash - repo : 1000;
 180         FILE *f = fopen(git_path("branches/%.*s", n, repo), "r");
 181         char *s, *p;
 182         int len;
 183
 184         if (!f)
 185                 return 0;
 186         s = fgets(buffer, BUF_SIZE, f);
 187         fclose(f);
 188         if (!s)
 189                 return 0;
 190         while (isspace(*s))
 191                 s++;
 192         if (!*s)
 193                 return 0;
 194         p = s + strlen(s);
 195         while (isspace(p[-1]))
 196                 *--p = 0;
 197         len = p - s;
 198         if (slash)
 199                 len += strlen(slash);
 200         p = xmalloc(len + 1);
 201         strcpy(p, s);
 202         if (slash)
 203                 strcat(p, slash);
 204         uri[0] = p;
 205         return 1;
 206 }
 207
 208 /*
 209  * Read remotes and branches file, fill the push target URI
 210  * list.  If there is no command line refspecs, read Push: lines
 211  * to set up the *refspec list as well.
 212  * return the number of push target URIs
 213  */
 214 static int read_config(const char *repo, const char *uri[MAX_URI])
 215 {
 216         int n;
 217
 218         if (*repo != '/') {
 219                 n = get_remotes_uri(repo, uri);
 220                 if (n > 0)
 221                         return n;
 222
 223                 n = get_config_remotes_uri(repo, uri);
 224                 if (n > 0)
 225                         return n;
 226
 227                 n = get_branches_uri(repo, uri);
 228                 if (n > 0)
 229                         return n;
 230         }
 231
 232         uri[0] = repo;
 233         return 1;
 234 }
 235
 236 static int do_push(const char *repo)
 237 {
 238         const char *uri[MAX_URI];
 239         int i, n;
 240         int common_argc;
 241         const char **argv;
 242         int argc;
 243
 244         n = read_config(repo, uri);
 245         if (n <= 0)
 246                 die("bad repository '%s'", repo);
 247
 248         argv = xmalloc((refspec_nr + 10) * sizeof(char *));
 249         argv[0] = "dummy-send-pack";
 250         argc = 1;
 251         if (all)
 252                 argv[argc++] = "--all";
 253         if (force)
 254                 argv[argc++] = "--force";
 255         if (execute)
 256                 argv[argc++] = execute;
 257         common_argc = argc;
 258
 259         for (i = 0; i < n; i++) {
 260                 int err;
 261                 int dest_argc = common_argc;
 262                 int dest_refspec_nr = refspec_nr;
 263                 const char **dest_refspec = refspec;
 264                 const char *dest = uri[i];
 265                 const char *sender = "git-send-pack";
 266                 if (!strncmp(dest, "http://", 7) ||
 267                     !strncmp(dest, "https://", 8))
 268                         sender = "git-http-push";
 269                 else if (thin)
 270                         argv[dest_argc++] = "--thin";
 271                 argv[0] = sender;
 272                 argv[dest_argc++] = dest;
 273                 while (dest_refspec_nr--)
 274                         argv[dest_argc++] = *dest_refspec++;
 275                 argv[dest_argc] = NULL;
 276                 if (verbose)
 277                         fprintf(stderr, "Pushing to %s\n", dest);
 278                 err = run_command_v(argc, argv);
 279                 if (!err)
 280                         continue;
 281                 switch (err) {
 282                 case -ERR_RUN_COMMAND_FORK:
 283                         die("unable to fork for %s", sender);
 284                 case -ERR_RUN_COMMAND_EXEC:
 285                         die("unable to exec %s", sender);
 286                 case -ERR_RUN_COMMAND_WAITPID:
 287                 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
 288                 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
 289                 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
 290                         die("%s died with strange error", sender);
 291                 default:
 292                         return -err;
 293                 }
 294         }
 295         return 0;
 296 }
 297
 298 int cmd_push(int argc, const char **argv, const char *prefix)
 299 {
 300         int i;
 301         const char *repo = "origin";    /* default repository */
 302
 303         for (i = 1; i < argc; i++) {
 304                 const char *arg = argv[i];
 305
 306                 if (arg[0] != '-') {
 307                         repo = arg;
 308                         i++;
 309                         break;
 310                 }
 311                 if (!strcmp(arg, "-v")) {
 312                         verbose=1;
 313                         continue;
 314                 }
 315                 if (!strncmp(arg, "--repo=", 7)) {
 316                         repo = arg+7;
 317                         continue;
 318                 }
 319                 if (!strcmp(arg, "--all")) {
 320                         all = 1;
 321                         continue;
 322                 }
 323                 if (!strcmp(arg, "--tags")) {
 324                         tags = 1;
 325                         continue;
 326                 }
 327                 if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) {
 328                         force = 1;
 329                         continue;
 330                 }
 331                 if (!strcmp(arg, "--thin")) {
 332                         thin = 1;
 333                         continue;
 334                 }
 335                 if (!strcmp(arg, "--no-thin")) {
 336                         thin = 0;
 337                         continue;
 338                 }
 339                 if (!strncmp(arg, "--exec=", 7)) {
 340                         execute = arg;
 341                         continue;
 342                 }
 343                 usage(push_usage);
 344         }
 345         set_refspecs(argv + i, argc - i);
 346         return do_push(repo);
 347 }