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 static int progress;
  22
  23 static const char **refspec;
  24 static int refspec_nr;
  25 static int refspec_alloc;
  26
  27 static void add_refspec(const char *ref)
  28 {
  29         refspec_nr++;
  30         ALLOC_GROW(refspec, refspec_nr, refspec_alloc);
  31         refspec[refspec_nr-1] = ref;
  32 }
  33
  34 static void set_refspecs(const char **refs, int nr)
  35 {
  36         int i;
  37         for (i = 0; i < nr; i++) {
  38                 const char *ref = refs[i];
  39                 if (!strcmp("tag", ref)) {
  40                         char *tag;
  41                         int len;
  42                         if (nr <= ++i)
  43                                 die("tag shorthand without <tag>");
  44                         len = strlen(refs[i]) + 11;
  45                         if (deleterefs) {
  46                                 tag = xmalloc(len+1);
  47                                 strcpy(tag, ":refs/tags/");
  48                         } else {
  49                                 tag = xmalloc(len);
  50                                 strcpy(tag, "refs/tags/");
  51                         }
  52                         strcat(tag, refs[i]);
  53                         ref = tag;
  54                 } else if (deleterefs && !strchr(ref, ':')) {
  55                         char *delref;
  56                         int len = strlen(ref)+1;
  57                         delref = xmalloc(len+1);
  58                         strcpy(delref, ":");
  59                         strcat(delref, ref);
  60                         ref = delref;
  61                 } else if (deleterefs)
  62                         die("--delete only accepts plain target ref names");
  63                 add_refspec(ref);
  64         }
  65 }
  66
  67 static void setup_push_tracking(void)
  68 {
  69         struct strbuf refspec = STRBUF_INIT;
  70         struct branch *branch = branch_get(NULL);
  71         if (!branch)
  72                 die("You are not currently on a branch.");
  73         if (!branch->merge_nr || !branch->merge)
  74                 die("The current branch %s is not tracking anything.",
  75                     branch->name);
  76         if (branch->merge_nr != 1)
  77                 die("The current branch %s is tracking multiple branches, "
  78                     "refusing to push.", branch->name);
  79         strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
  80         add_refspec(refspec.buf);
  81 }
  82
  83 static void setup_default_push_refspecs(void)
  84 {
  85         switch (push_default) {
  86         default:
  87         case PUSH_DEFAULT_MATCHING:
  88                 add_refspec(":");
  89                 break;
  90
  91         case PUSH_DEFAULT_TRACKING:
  92                 setup_push_tracking();
  93                 break;
  94
  95         case PUSH_DEFAULT_CURRENT:
  96                 add_refspec("HEAD");
  97                 break;
  98
  99         case PUSH_DEFAULT_NOTHING:
 100                 die("You didn't specify any refspecs to push, and "
 101                     "push.default is \"nothing\".");
 102                 break;
 103         }
 104 }
 105
 106 static int push_with_options(struct transport *transport, int flags)
 107 {
 108         int err;
 109         int nonfastforward;
 110
 111         transport_set_verbosity(transport, verbosity, progress);
 112
 113         if (receivepack)
 114                 transport_set_option(transport,
 115                                      TRANS_OPT_RECEIVEPACK, receivepack);
 116         if (thin)
 117                 transport_set_option(transport, TRANS_OPT_THIN, "yes");
 118
 119         if (verbosity > 0)
 120                 fprintf(stderr, "Pushing to %s\n", transport->url);
 121         err = transport_push(transport, refspec_nr, refspec, flags,
 122                              &nonfastforward);
 123         if (err != 0)
 124                 error("failed to push some refs to '%s'", transport->url);
 125
 126         err |= transport_disconnect(transport);
 127
 128         if (!err)
 129                 return 0;
 130
 131         if (nonfastforward && advice_push_nonfastforward) {
 132                 fprintf(stderr, "To prevent you from losing history, non-fast-forward updates were rejected\n"
 133                                 "Merge the remote changes (e.g. 'git pull') before pushing again.  See the\n"
 134                                 "'Note about fast-forwards' section of 'git push --help' for details.\n");
 135         }
 136
 137         return 1;
 138 }
 139
 140 static int do_push(const char *repo, int flags)
 141 {
 142         int i, errs;
 143         struct remote *remote = remote_get(repo);
 144         const char **url;
 145         int url_nr;
 146
 147         if (!remote) {
 148                 if (repo)
 149                         die("bad repository '%s'", repo);
 150                 die("No destination configured to push to.");
 151         }
 152
 153         if (remote->mirror)
 154                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 155
 156         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 157                 if (!strcmp(*refspec, "refs/tags/*"))
 158                         return error("--all and --tags are incompatible");
 159                 return error("--all can't be combined with refspecs");
 160         }
 161
 162         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 163                 if (!strcmp(*refspec, "refs/tags/*"))
 164                         return error("--mirror and --tags are incompatible");
 165                 return error("--mirror can't be combined with refspecs");
 166         }
 167
 168         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 169                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 170                 return error("--all and --mirror are incompatible");
 171         }
 172
 173         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 174                 if (remote->push_refspec_nr) {
 175                         refspec = remote->push_refspec;
 176                         refspec_nr = remote->push_refspec_nr;
 177                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 178                         setup_default_push_refspecs();
 179         }
 180         errs = 0;
 181         if (remote->pushurl_nr) {
 182                 url = remote->pushurl;
 183                 url_nr = remote->pushurl_nr;
 184         } else {
 185                 url = remote->url;
 186                 url_nr = remote->url_nr;
 187         }
 188         if (url_nr) {
 189                 for (i = 0; i < url_nr; i++) {
 190                         struct transport *transport =
 191                                 transport_get(remote, url[i]);
 192                         if (push_with_options(transport, flags))
 193                                 errs++;
 194                 }
 195         } else {
 196                 struct transport *transport =
 197                         transport_get(remote, NULL);
 198
 199                 if (push_with_options(transport, flags))
 200                         errs++;
 201         }
 202         return !!errs;
 203 }
 204
 205 int cmd_push(int argc, const char **argv, const char *prefix)
 206 {
 207         int flags = 0;
 208         int tags = 0;
 209         int rc;
 210         const char *repo = NULL;        /* default repository */
 211         struct option options[] = {
 212                 OPT__VERBOSITY(&verbosity),
 213                 OPT_STRING( 0 , "repo", &repo, "repository", "repository"),
 214                 OPT_BIT( 0 , "all", &flags, "push all refs", TRANSPORT_PUSH_ALL),
 215                 OPT_BIT( 0 , "mirror", &flags, "mirror all refs",
 216                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 217                 OPT_BOOLEAN( 0, "delete", &deleterefs, "delete refs"),
 218                 OPT_BOOLEAN( 0 , "tags", &tags, "push tags (can't be used with --all or --mirror)"),
 219                 OPT_BIT('n' , "dry-run", &flags, "dry run", TRANSPORT_PUSH_DRY_RUN),
 220                 OPT_BIT( 0,  "porcelain", &flags, "machine-readable output", TRANSPORT_PUSH_PORCELAIN),
 221                 OPT_BIT('f', "force", &flags, "force updates", TRANSPORT_PUSH_FORCE),
 222                 OPT_BOOLEAN( 0 , "thin", &thin, "use thin pack"),
 223                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", "receive pack program"),
 224                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", "receive pack program"),
 225                 OPT_BIT('u', "set-upstream", &flags, "set upstream for git pull/status",
 226                         TRANSPORT_PUSH_SET_UPSTREAM),
 227                 OPT_BOOLEAN(0, "progress", &progress, "force progress reporting"),
 228                 OPT_END()
 229         };
 230
 231         git_config(git_default_config, NULL);
 232         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 233
 234         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 235                 die("--delete is incompatible with --all, --mirror and --tags");
 236         if (deleterefs && argc < 2)
 237                 die("--delete doesn't make sense without any refs");
 238
 239         if (tags)
 240                 add_refspec("refs/tags/*");
 241
 242         if (argc > 0) {
 243                 repo = argv[0];
 244                 set_refspecs(argv + 1, argc - 1);
 245         }
 246
 247         rc = do_push(repo, flags);
 248         if (rc == -1)
 249                 usage_with_options(push_usage, options);
 250         else
 251                 return rc;
 252 }