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 #include "remote.h"
   9 #include "transport.h"
  10 #include "parse-options.h"
  11
  12 static const char * const push_usage[] = {
  13         "git push [<options>] [<repository> <refspec>...]",
  14         NULL,
  15 };
  16
  17 static int thin;
  18 static int deleterefs;
  19 static const char *receivepack;
  20 static int verbosity;
  21
  22 static const char **refspec;
  23 static int refspec_nr;
  24
  25 static void add_refspec(const char *ref)
  26 {
  27         int nr = refspec_nr + 1;
  28         refspec = xrealloc(refspec, nr * sizeof(char *));
  29         refspec[nr-1] = ref;
  30         refspec_nr = nr;
  31 }
  32
  33 static void set_refspecs(const char **refs, int nr)
  34 {
  35         int i;
  36         for (i = 0; i < nr; i++) {
  37                 const char *ref = refs[i];
  38                 if (!strcmp("tag", ref)) {
  39                         char *tag;
  40                         int len;
  41                         if (nr <= ++i)
  42                                 die("tag shorthand without <tag>");
  43                         len = strlen(refs[i]) + 11;
  44                         if (deleterefs) {
  45                                 tag = xmalloc(len+1);
  46                                 strcpy(tag, ":refs/tags/");
  47                         } else {
  48                                 tag = xmalloc(len);
  49                                 strcpy(tag, "refs/tags/");
  50                         }
  51                         strcat(tag, refs[i]);
  52                         ref = tag;
  53                 } else if (deleterefs && !strchr(ref, ':')) {
  54                         char *delref;
  55                         int len = strlen(ref)+1;
  56                         delref = xmalloc(len+1);
  57                         strcpy(delref, ":");
  58                         strcat(delref, ref);
  59                         ref = delref;
  60                 } else if (deleterefs)
  61                         die("--delete only accepts plain target ref names");
  62                 add_refspec(ref);
  63         }
  64 }
  65
  66 static void setup_push_tracking(void)
  67 {
  68         struct strbuf refspec = STRBUF_INIT;
  69         struct branch *branch = branch_get(NULL);
  70         if (!branch)
  71                 die("You are not currently on a branch.");
  72         if (!branch->merge_nr)
  73                 die("The current branch %s is not tracking anything.",
  74                     branch->name);
  75         if (branch->merge_nr != 1)
  76                 die("The current branch %s is tracking multiple branches, "
  77                     "refusing to push.", branch->name);
  78         strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
  79         add_refspec(refspec.buf);
  80 }
  81
  82 static void setup_default_push_refspecs(void)
  83 {
  84         switch (push_default) {
  85         default:
  86         case PUSH_DEFAULT_MATCHING:
  87                 add_refspec(":");
  88                 break;
  89
  90         case PUSH_DEFAULT_TRACKING:
  91                 setup_push_tracking();
  92                 break;
  93
  94         case PUSH_DEFAULT_CURRENT:
  95                 add_refspec("HEAD");
  96                 break;
  97
  98         case PUSH_DEFAULT_NOTHING:
  99                 die("You didn't specify any refspecs to push, and "
 100                     "push.default is \"nothing\".");
 101                 break;
 102         }
 103 }
 104
 105 static int push_with_options(struct transport *transport, int flags)
 106 {
 107         int err;
 108         int nonfastforward;
 109
 110         transport_set_verbosity(transport, verbosity, 0);
 111
 112         if (receivepack)
 113                 transport_set_option(transport,
 114                                      TRANS_OPT_RECEIVEPACK, receivepack);
 115         if (thin)
 116                 transport_set_option(transport, TRANS_OPT_THIN, "yes");
 117
 118         if (verbosity > 0)
 119                 fprintf(stderr, "Pushing to %s\n", transport->url);
 120         err = transport_push(transport, refspec_nr, refspec, flags,
 121                              &nonfastforward);
 122         if (err != 0)
 123                 error("failed to push some refs to '%s'", transport->url);
 124
 125         err |= transport_disconnect(transport);
 126
 127         if (!err)
 128                 return 0;
 129
 130         if (nonfastforward && advice_push_nonfastforward) {
 131                 printf("To prevent you from losing history, non-fast-forward updates were rejected\n"
 132                        "Merge the remote changes before pushing again.  See the 'Note about\n"
 133                        "fast-forwards' section of 'git push --help' for details.\n");
 134         }
 135
 136         return 1;
 137 }
 138
 139 static int do_push(const char *repo, int flags)
 140 {
 141         int i, errs;
 142         struct remote *remote = remote_get(repo);
 143         const char **url;
 144         int url_nr;
 145
 146         if (!remote) {
 147                 if (repo)
 148                         die("bad repository '%s'", repo);
 149                 die("No destination configured to push to.");
 150         }
 151
 152         if (remote->mirror)
 153                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 154
 155         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 156                 if (!strcmp(*refspec, "refs/tags/*"))
 157                         return error("--all and --tags are incompatible");
 158                 return error("--all can't be combined with refspecs");
 159         }
 160
 161         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 162                 if (!strcmp(*refspec, "refs/tags/*"))
 163                         return error("--mirror and --tags are incompatible");
 164                 return error("--mirror can't be combined with refspecs");
 165         }
 166
 167         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 168                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 169                 return error("--all and --mirror are incompatible");
 170         }
 171
 172         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 173                 if (remote->push_refspec_nr) {
 174                         refspec = remote->push_refspec;
 175                         refspec_nr = remote->push_refspec_nr;
 176                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 177                         setup_default_push_refspecs();
 178         }
 179         errs = 0;
 180         if (remote->pushurl_nr) {
 181                 url = remote->pushurl;
 182                 url_nr = remote->pushurl_nr;
 183         } else {
 184                 url = remote->url;
 185                 url_nr = remote->url_nr;
 186         }
 187         if (url_nr) {
 188                 for (i = 0; i < url_nr; i++) {
 189                         struct transport *transport =
 190                                 transport_get(remote, url[i]);
 191                         if (push_with_options(transport, flags))
 192                                 errs++;
 193                 }
 194         } else {
 195                 struct transport *transport =
 196                         transport_get(remote, NULL);
 197
 198                 if (push_with_options(transport, flags))
 199                         errs++;
 200         }
 201         return !!errs;
 202 }
 203
 204 int cmd_push(int argc, const char **argv, const char *prefix)
 205 {
 206         int flags = 0;
 207         int tags = 0;
 208         int rc;
 209         const char *repo = NULL;        /* default repository */
 210         struct option options[] = {
 211                 OPT__VERBOSITY(&verbosity),
 212                 OPT_STRING( 0 , "repo", &repo, "repository", "repository"),
 213                 OPT_BIT( 0 , "all", &flags, "push all refs", TRANSPORT_PUSH_ALL),
 214                 OPT_BIT( 0 , "mirror", &flags, "mirror all refs",
 215                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 216                 OPT_BOOLEAN( 0, "delete", &deleterefs, "delete refs"),
 217                 OPT_BOOLEAN( 0 , "tags", &tags, "push tags (can't be used with --all or --mirror)"),
 218                 OPT_BIT('n' , "dry-run", &flags, "dry run", TRANSPORT_PUSH_DRY_RUN),
 219                 OPT_BIT( 0,  "porcelain", &flags, "machine-readable output", TRANSPORT_PUSH_PORCELAIN),
 220                 OPT_BIT('f', "force", &flags, "force updates", TRANSPORT_PUSH_FORCE),
 221                 OPT_BOOLEAN( 0 , "thin", &thin, "use thin pack"),
 222                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", "receive pack program"),
 223                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", "receive pack program"),
 224                 OPT_BIT('u', "set-upstream", &flags, "set upstream for git pull/status",
 225                         TRANSPORT_PUSH_SET_UPSTREAM),
 226                 OPT_END()
 227         };
 228
 229         git_config(git_default_config, NULL);
 230         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 231
 232         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 233                 die("--delete is incompatible with --all, --mirror and --tags");
 234         if (deleterefs && argc < 2)
 235                 die("--delete doesn't make sense without any refs");
 236
 237         if (tags)
 238                 add_refspec("refs/tags/*");
 239
 240         if (argc > 0) {
 241                 repo = argv[0];
 242                 set_refspecs(argv + 1, argc - 1);
 243         }
 244
 245         rc = do_push(repo, flags);
 246         if (rc == -1)
 247                 usage_with_options(push_usage, options);
 248         else
 249                 return rc;
 250 }