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_upstream(struct remote *remote)
  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.\n"
  73                     "To push the history leading to the current (detached HEAD)\n"
  74                     "state now, use\n"
  75                     "\n"
  76                     "    git push %s HEAD:<name-of-remote-branch>\n",
  77                     remote->name);
  78         if (!branch->merge_nr || !branch->merge)
  79                 die("The current branch %s has no upstream branch.\n"
  80                     "To push the current branch and set the remote as upstream, use\n"
  81                     "\n"
  82                     "    git push --set-upstream %s %s\n",
  83                     branch->name,
  84                     remote->name,
  85                     branch->name);
  86         if (branch->merge_nr != 1)
  87                 die("The current branch %s has multiple upstream branches, "
  88                     "refusing to push.", branch->name);
  89         strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
  90         add_refspec(refspec.buf);
  91 }
  92
  93 static void setup_default_push_refspecs(struct remote *remote)
  94 {
  95         switch (push_default) {
  96         default:
  97         case PUSH_DEFAULT_MATCHING:
  98                 add_refspec(":");
  99                 break;
 100
 101         case PUSH_DEFAULT_UPSTREAM:
 102                 setup_push_upstream(remote);
 103                 break;
 104
 105         case PUSH_DEFAULT_CURRENT:
 106                 add_refspec("HEAD");
 107                 break;
 108
 109         case PUSH_DEFAULT_NOTHING:
 110                 die("You didn't specify any refspecs to push, and "
 111                     "push.default is \"nothing\".");
 112                 break;
 113         }
 114 }
 115
 116 static int push_with_options(struct transport *transport, int flags)
 117 {
 118         int err;
 119         int nonfastforward;
 120
 121         transport_set_verbosity(transport, verbosity, progress);
 122
 123         if (receivepack)
 124                 transport_set_option(transport,
 125                                      TRANS_OPT_RECEIVEPACK, receivepack);
 126         if (thin)
 127                 transport_set_option(transport, TRANS_OPT_THIN, "yes");
 128
 129         if (verbosity > 0)
 130                 fprintf(stderr, "Pushing to %s\n", transport->url);
 131         err = transport_push(transport, refspec_nr, refspec, flags,
 132                              &nonfastforward);
 133         if (err != 0)
 134                 error("failed to push some refs to '%s'", transport->url);
 135
 136         err |= transport_disconnect(transport);
 137
 138         if (!err)
 139                 return 0;
 140
 141         if (nonfastforward && advice_push_nonfastforward) {
 142                 fprintf(stderr, "To prevent you from losing history, non-fast-forward updates were rejected\n"
 143                                 "Merge the remote changes (e.g. 'git pull') before pushing again.  See the\n"
 144                                 "'Note about fast-forwards' section of 'git push --help' for details.\n");
 145         }
 146
 147         return 1;
 148 }
 149
 150 static int do_push(const char *repo, int flags)
 151 {
 152         int i, errs;
 153         struct remote *remote = remote_get(repo);
 154         const char **url;
 155         int url_nr;
 156
 157         if (!remote) {
 158                 if (repo)
 159                         die("bad repository '%s'", repo);
 160                 die("No destination configured to push to.");
 161         }
 162
 163         if (remote->mirror)
 164                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 165
 166         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 167                 if (!strcmp(*refspec, "refs/tags/*"))
 168                         return error("--all and --tags are incompatible");
 169                 return error("--all can't be combined with refspecs");
 170         }
 171
 172         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 173                 if (!strcmp(*refspec, "refs/tags/*"))
 174                         return error("--mirror and --tags are incompatible");
 175                 return error("--mirror can't be combined with refspecs");
 176         }
 177
 178         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 179                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 180                 return error("--all and --mirror are incompatible");
 181         }
 182
 183         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 184                 if (remote->push_refspec_nr) {
 185                         refspec = remote->push_refspec;
 186                         refspec_nr = remote->push_refspec_nr;
 187                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 188                         setup_default_push_refspecs(remote);
 189         }
 190         errs = 0;
 191         if (remote->pushurl_nr) {
 192                 url = remote->pushurl;
 193                 url_nr = remote->pushurl_nr;
 194         } else {
 195                 url = remote->url;
 196                 url_nr = remote->url_nr;
 197         }
 198         if (url_nr) {
 199                 for (i = 0; i < url_nr; i++) {
 200                         struct transport *transport =
 201                                 transport_get(remote, url[i]);
 202                         if (push_with_options(transport, flags))
 203                                 errs++;
 204                 }
 205         } else {
 206                 struct transport *transport =
 207                         transport_get(remote, NULL);
 208
 209                 if (push_with_options(transport, flags))
 210                         errs++;
 211         }
 212         return !!errs;
 213 }
 214
 215 int cmd_push(int argc, const char **argv, const char *prefix)
 216 {
 217         int flags = 0;
 218         int tags = 0;
 219         int rc;
 220         const char *repo = NULL;        /* default repository */
 221         struct option options[] = {
 222                 OPT__VERBOSITY(&verbosity),
 223                 OPT_STRING( 0 , "repo", &repo, "repository", "repository"),
 224                 OPT_BIT( 0 , "all", &flags, "push all refs", TRANSPORT_PUSH_ALL),
 225                 OPT_BIT( 0 , "mirror", &flags, "mirror all refs",
 226                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 227                 OPT_BOOLEAN( 0, "delete", &deleterefs, "delete refs"),
 228                 OPT_BOOLEAN( 0 , "tags", &tags, "push tags (can't be used with --all or --mirror)"),
 229                 OPT_BIT('n' , "dry-run", &flags, "dry run", TRANSPORT_PUSH_DRY_RUN),
 230                 OPT_BIT( 0,  "porcelain", &flags, "machine-readable output", TRANSPORT_PUSH_PORCELAIN),
 231                 OPT_BIT('f', "force", &flags, "force updates", TRANSPORT_PUSH_FORCE),
 232                 OPT_BOOLEAN( 0 , "thin", &thin, "use thin pack"),
 233                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", "receive pack program"),
 234                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", "receive pack program"),
 235                 OPT_BIT('u', "set-upstream", &flags, "set upstream for git pull/status",
 236                         TRANSPORT_PUSH_SET_UPSTREAM),
 237                 OPT_BOOLEAN(0, "progress", &progress, "force progress reporting"),
 238                 OPT_END()
 239         };
 240
 241         git_config(git_default_config, NULL);
 242         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 243
 244         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 245                 die("--delete is incompatible with --all, --mirror and --tags");
 246         if (deleterefs && argc < 2)
 247                 die("--delete doesn't make sense without any refs");
 248
 249         if (tags)
 250                 add_refspec("refs/tags/*");
 251
 252         if (argc > 0) {
 253                 repo = argv[0];
 254                 set_refspecs(argv + 1, argc - 1);
 255         }
 256
 257         rc = do_push(repo, flags);
 258         if (rc == -1)
 259                 usage_with_options(push_usage, options);
 260         else
 261                 return rc;
 262 }