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