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 push_with_options(struct transport *transport, int flags)
 105 {
 106         int err;
 107         int nonfastforward;
 108         if (receivepack)
 109                 transport_set_option(transport,
 110                                      TRANS_OPT_RECEIVEPACK, receivepack);
 111         if (thin)
 112                 transport_set_option(transport, TRANS_OPT_THIN, "yes");
 113
 114         if (flags & TRANSPORT_PUSH_VERBOSE)
 115                 fprintf(stderr, "Pushing to %s\n", transport->url);
 116         err = transport_push(transport, refspec_nr, refspec, flags,
 117                              &nonfastforward);
 118         if (err != 0)
 119                 error("failed to push some refs to '%s'", transport->url);
 120
 121         err |= transport_disconnect(transport);
 122
 123         if (!err)
 124                 return 0;
 125
 126         if (nonfastforward && advice_push_nonfastforward) {
 127                 printf("To prevent you from losing history, non-fast-forward updates were rejected\n"
 128                        "Merge the remote changes before pushing again.  See the 'Note about\n"
 129                        "fast-forwards' section of 'git push --help' for details.\n");
 130         }
 131
 132         return 1;
 133 }
 134
 135 static int do_push(const char *repo, int flags)
 136 {
 137         int i, errs;
 138         struct remote *remote = remote_get(repo);
 139         const char **url;
 140         int url_nr;
 141
 142         if (!remote) {
 143                 if (repo)
 144                         die("bad repository '%s'", repo);
 145                 die("No destination configured to push to.");
 146         }
 147
 148         if (remote->mirror)
 149                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 150
 151         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 152                 if (!strcmp(*refspec, "refs/tags/*"))
 153                         return error("--all and --tags are incompatible");
 154                 return error("--all can't be combined with refspecs");
 155         }
 156
 157         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 158                 if (!strcmp(*refspec, "refs/tags/*"))
 159                         return error("--mirror and --tags are incompatible");
 160                 return error("--mirror can't be combined with refspecs");
 161         }
 162
 163         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 164                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 165                 return error("--all and --mirror are incompatible");
 166         }
 167
 168         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 169                 if (remote->push_refspec_nr) {
 170                         refspec = remote->push_refspec;
 171                         refspec_nr = remote->push_refspec_nr;
 172                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 173                         setup_default_push_refspecs();
 174         }
 175         errs = 0;
 176         if (remote->pushurl_nr) {
 177                 url = remote->pushurl;
 178                 url_nr = remote->pushurl_nr;
 179         } else {
 180                 url = remote->url;
 181                 url_nr = remote->url_nr;
 182         }
 183         if (url_nr) {
 184                 for (i = 0; i < url_nr; i++) {
 185                         struct transport *transport =
 186                                 transport_get(remote, url[i]);
 187                         if (push_with_options(transport, flags))
 188                                 errs++;
 189                 }
 190         } else {
 191                 struct transport *transport =
 192                         transport_get(remote, NULL);
 193
 194                 if (push_with_options(transport, flags))
 195                         errs++;
 196         }
 197         return !!errs;
 198 }
 199
 200 int cmd_push(int argc, const char **argv, const char *prefix)
 201 {
 202         int flags = 0;
 203         int tags = 0;
 204         int rc;
 205         const char *repo = NULL;        /* default repository */
 206         struct option options[] = {
 207                 OPT_BIT('q', "quiet", &flags, "be quiet", TRANSPORT_PUSH_QUIET),
 208                 OPT_BIT('v', "verbose", &flags, "be verbose", TRANSPORT_PUSH_VERBOSE),
 209                 OPT_STRING( 0 , "repo", &repo, "repository", "repository"),
 210                 OPT_BIT( 0 , "all", &flags, "push all refs", TRANSPORT_PUSH_ALL),
 211                 OPT_BIT( 0 , "mirror", &flags, "mirror all refs",
 212                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 213                 OPT_BOOLEAN( 0, "delete", &deleterefs, "delete refs"),
 214                 OPT_BOOLEAN( 0 , "tags", &tags, "push tags (can't be used with --all or --mirror)"),
 215                 OPT_BIT('n' , "dry-run", &flags, "dry run", TRANSPORT_PUSH_DRY_RUN),
 216                 OPT_BIT( 0,  "porcelain", &flags, "machine-readable output", TRANSPORT_PUSH_PORCELAIN),
 217                 OPT_BIT('f', "force", &flags, "force updates", TRANSPORT_PUSH_FORCE),
 218                 OPT_BOOLEAN( 0 , "thin", &thin, "use thin pack"),
 219                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", "receive pack program"),
 220                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", "receive pack program"),
 221                 OPT_END()
 222         };
 223
 224         git_config(git_default_config, NULL);
 225         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 226
 227         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 228                 die("--delete is incompatible with --all, --mirror and --tags");
 229         if (deleterefs && argc < 2)
 230                 die("--delete doesn't make sense without any refs");
 231
 232         if (tags)
 233                 add_refspec("refs/tags/*");
 234
 235         if (argc > 0) {
 236                 repo = argv[0];
 237                 set_refspecs(argv + 1, argc - 1);
 238         }
 239
 240         rc = do_push(repo, flags);
 241         if (rc == -1)
 242                 usage_with_options(push_usage, options);
 243         else
 244                 return rc;
 245 }