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