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] [--receive-pack=<git-receive-pack>] [--repo=all] [-f | --force] [-v] [<repository> <refspec>...]";
  12
  13 static int all, tags, force, thin = 1, verbose;
  14 static const char *receivepack;
  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 static int config_get_receivepack;
 147
 148 static int get_remote_config(const char* key, const char* value)
 149 {
 150         if (!strncmp(key, "remote.", 7) &&
 151             !strncmp(key + 7, config_repo, config_repo_len)) {
 152                 if (!strcmp(key + 7 + config_repo_len, ".url")) {
 153                         if (config_current_uri < MAX_URI)
 154                                 config_uri[config_current_uri++] = xstrdup(value);
 155                         else
 156                                 error("more than %d URL's specified, ignoring the rest", MAX_URI);
 157                 }
 158                 else if (config_get_refspecs &&
 159                          !strcmp(key + 7 + config_repo_len, ".push"))
 160                         add_refspec(xstrdup(value));
 161                 else if (config_get_receivepack &&
 162                          !strcmp(key + 7 + config_repo_len, ".receivepack")) {
 163                         if (!receivepack) {
 164                                 char *rp = xmalloc(strlen(value) + 16);
 165                                 sprintf(rp, "--receive-pack=%s", value);
 166                                 receivepack = rp;
 167                         } else
 168                                 error("more than one receivepack given, using the first");
 169                 }
 170         }
 171         return 0;
 172 }
 173
 174 static int get_config_remotes_uri(const char *repo, const char *uri[MAX_URI])
 175 {
 176         config_repo_len = strlen(repo);
 177         config_repo = repo;
 178         config_current_uri = 0;
 179         config_uri = uri;
 180         config_get_refspecs = !(refspec_nr || all || tags);
 181         config_get_receivepack = (receivepack == NULL);
 182
 183         git_config(get_remote_config);
 184         return config_current_uri;
 185 }
 186
 187 static int get_branches_uri(const char *repo, const char *uri[MAX_URI])
 188 {
 189         const char *slash = strchr(repo, '/');
 190         int n = slash ? slash - repo : 1000;
 191         FILE *f = fopen(git_path("branches/%.*s", n, repo), "r");
 192         char *s, *p;
 193         int len;
 194
 195         if (!f)
 196                 return 0;
 197         s = fgets(buffer, BUF_SIZE, f);
 198         fclose(f);
 199         if (!s)
 200                 return 0;
 201         while (isspace(*s))
 202                 s++;
 203         if (!*s)
 204                 return 0;
 205         p = s + strlen(s);
 206         while (isspace(p[-1]))
 207                 *--p = 0;
 208         len = p - s;
 209         if (slash)
 210                 len += strlen(slash);
 211         p = xmalloc(len + 1);
 212         strcpy(p, s);
 213         if (slash)
 214                 strcat(p, slash);
 215         uri[0] = p;
 216         return 1;
 217 }
 218
 219 /*
 220  * Read remotes and branches file, fill the push target URI
 221  * list.  If there is no command line refspecs, read Push: lines
 222  * to set up the *refspec list as well.
 223  * return the number of push target URIs
 224  */
 225 static int read_config(const char *repo, const char *uri[MAX_URI])
 226 {
 227         int n;
 228
 229         if (*repo != '/') {
 230                 n = get_remotes_uri(repo, uri);
 231                 if (n > 0)
 232                         return n;
 233
 234                 n = get_config_remotes_uri(repo, uri);
 235                 if (n > 0)
 236                         return n;
 237
 238                 n = get_branches_uri(repo, uri);
 239                 if (n > 0)
 240                         return n;
 241         }
 242
 243         uri[0] = repo;
 244         return 1;
 245 }
 246
 247 static int do_push(const char *repo)
 248 {
 249         const char *uri[MAX_URI];
 250         int i, n;
 251         int common_argc;
 252         const char **argv;
 253         int argc;
 254
 255         n = read_config(repo, uri);
 256         if (n <= 0)
 257                 die("bad repository '%s'", repo);
 258
 259         argv = xmalloc((refspec_nr + 10) * sizeof(char *));
 260         argv[0] = "dummy-send-pack";
 261         argc = 1;
 262         if (all)
 263                 argv[argc++] = "--all";
 264         if (force)
 265                 argv[argc++] = "--force";
 266         if (receivepack)
 267                 argv[argc++] = receivepack;
 268         common_argc = argc;
 269
 270         for (i = 0; i < n; i++) {
 271                 int err;
 272                 int dest_argc = common_argc;
 273                 int dest_refspec_nr = refspec_nr;
 274                 const char **dest_refspec = refspec;
 275                 const char *dest = uri[i];
 276                 const char *sender = "git-send-pack";
 277                 if (!strncmp(dest, "http://", 7) ||
 278                     !strncmp(dest, "https://", 8))
 279                         sender = "git-http-push";
 280                 else if (thin)
 281                         argv[dest_argc++] = "--thin";
 282                 argv[0] = sender;
 283                 argv[dest_argc++] = dest;
 284                 while (dest_refspec_nr--)
 285                         argv[dest_argc++] = *dest_refspec++;
 286                 argv[dest_argc] = NULL;
 287                 if (verbose)
 288                         fprintf(stderr, "Pushing to %s\n", dest);
 289                 err = run_command_v(argv);
 290                 if (!err)
 291                         continue;
 292                 switch (err) {
 293                 case -ERR_RUN_COMMAND_FORK:
 294                         die("unable to fork for %s", sender);
 295                 case -ERR_RUN_COMMAND_EXEC:
 296                         die("unable to exec %s", sender);
 297                 case -ERR_RUN_COMMAND_WAITPID:
 298                 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
 299                 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
 300                 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
 301                         die("%s died with strange error", sender);
 302                 default:
 303                         return -err;
 304                 }
 305         }
 306         return 0;
 307 }
 308
 309 int cmd_push(int argc, const char **argv, const char *prefix)
 310 {
 311         int i;
 312         const char *repo = "origin";    /* default repository */
 313
 314         for (i = 1; i < argc; i++) {
 315                 const char *arg = argv[i];
 316
 317                 if (arg[0] != '-') {
 318                         repo = arg;
 319                         i++;
 320                         break;
 321                 }
 322                 if (!strcmp(arg, "-v")) {
 323                         verbose=1;
 324                         continue;
 325                 }
 326                 if (!strncmp(arg, "--repo=", 7)) {
 327                         repo = arg+7;
 328                         continue;
 329                 }
 330                 if (!strcmp(arg, "--all")) {
 331                         all = 1;
 332                         continue;
 333                 }
 334                 if (!strcmp(arg, "--tags")) {
 335                         tags = 1;
 336                         continue;
 337                 }
 338                 if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) {
 339                         force = 1;
 340                         continue;
 341                 }
 342                 if (!strcmp(arg, "--thin")) {
 343                         thin = 1;
 344                         continue;
 345                 }
 346                 if (!strcmp(arg, "--no-thin")) {
 347                         thin = 0;
 348                         continue;
 349                 }
 350                 if (!strncmp(arg, "--receive-pack=", 15)) {
 351                         receivepack = arg;
 352                         continue;
 353                 }
 354                 if (!strncmp(arg, "--exec=", 7)) {
 355                         receivepack = arg;
 356                         continue;
 357                 }
 358                 usage(push_usage);
 359         }
 360         set_refspecs(argv + i, argc - i);
 361         return do_push(repo);
 362 }