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
   9 #define MAX_URI (16)
  10
  11 static const char push_usage[] = "git push [--all] [--tags] [--force] <repository> [<refspec>...]";
  12
  13 static int all = 0, tags = 0, force = 0, thin = 1;
  14 static const char *execute = NULL;
  15
  16 #define BUF_SIZE (2084)
  17 static char buffer[BUF_SIZE];
  18
  19 static const char **refspec = NULL;
  20 static int refspec_nr = 0;
  21
  22 static void add_refspec(const char *ref)
  23 {
  24         int nr = refspec_nr + 1;
  25         refspec = xrealloc(refspec, nr * sizeof(char *));
  26         refspec[nr-1] = ref;
  27         refspec_nr = nr;
  28 }
  29
  30 static int expand_one_ref(const char *ref, const unsigned char *sha1)
  31 {
  32         /* Ignore the "refs/" at the beginning of the refname */
  33         ref += 5;
  34
  35         if (strncmp(ref, "tags/", 5))
  36                 return 0;
  37
  38         add_refspec(strdup(ref));
  39         return 0;
  40 }
  41
  42 static void expand_refspecs(void)
  43 {
  44         if (all) {
  45                 if (refspec_nr)
  46                         die("cannot mix '--all' and a refspec");
  47
  48                 /*
  49                  * No need to expand "--all" - we'll just use
  50                  * the "--all" flag to send-pack
  51                  */
  52                 return;
  53         }
  54         if (!tags)
  55                 return;
  56         for_each_ref(expand_one_ref);
  57 }
  58
  59 static void set_refspecs(const char **refs, int nr)
  60 {
  61         if (nr) {
  62                 size_t bytes = nr * sizeof(char *);
  63
  64                 refspec = xrealloc(refspec, bytes);
  65                 memcpy(refspec, refs, bytes);
  66                 refspec_nr = nr;
  67         }
  68         expand_refspecs();
  69 }
  70
  71 static int get_remotes_uri(const char *repo, const char *uri[MAX_URI])
  72 {
  73         int n = 0;
  74         FILE *f = fopen(git_path("remotes/%s", repo), "r");
  75         int has_explicit_refspec = refspec_nr || all || tags;
  76
  77         if (!f)
  78                 return -1;
  79         while (fgets(buffer, BUF_SIZE, f)) {
  80                 int is_refspec;
  81                 char *s, *p;
  82
  83                 if (!strncmp("URL: ", buffer, 5)) {
  84                         is_refspec = 0;
  85                         s = buffer + 5;
  86                 } else if (!strncmp("Push: ", buffer, 6)) {
  87                         is_refspec = 1;
  88                         s = buffer + 6;
  89                 } else
  90                         continue;
  91
  92                 /* Remove whitespace at the head.. */
  93                 while (isspace(*s))
  94                         s++;
  95                 if (!*s)
  96                         continue;
  97
  98                 /* ..and at the end */
  99                 p = s + strlen(s);
 100                 while (isspace(p[-1]))
 101                         *--p = 0;
 102
 103                 if (!is_refspec) {
 104                         if (n < MAX_URI)
 105                                 uri[n++] = strdup(s);
 106                         else
 107                                 error("more than %d URL's specified, ignoreing the rest", MAX_URI);
 108                 }
 109                 else if (is_refspec && !has_explicit_refspec)
 110                         add_refspec(strdup(s));
 111         }
 112         fclose(f);
 113         if (!n)
 114                 die("remote '%s' has no URL", repo);
 115         return n;
 116 }
 117
 118 static const char **config_uri;
 119 static const char *config_repo;
 120 static int config_repo_len;
 121 static int config_current_uri;
 122 static int config_get_refspecs;
 123
 124 static int get_remote_config(const char* key, const char* value)
 125 {
 126         if (!strncmp(key, "remote.", 7) &&
 127             !strncmp(key + 7, config_repo, config_repo_len)) {
 128                 if (!strcmp(key + 7 + config_repo_len, ".url")) {
 129                         if (config_current_uri < MAX_URI)
 130                                 config_uri[config_current_uri++] = strdup(value);
 131                         else
 132                                 error("more than %d URL's specified, ignoring the rest", MAX_URI);
 133                 }
 134                 else if (config_get_refspecs &&
 135                          !strcmp(key + 7 + config_repo_len, ".push"))
 136                         add_refspec(strdup(value));
 137         }
 138         return 0;
 139 }
 140
 141 static int get_config_remotes_uri(const char *repo, const char *uri[MAX_URI])
 142 {
 143         config_repo_len = strlen(repo);
 144         config_repo = repo;
 145         config_current_uri = 0;
 146         config_uri = uri;
 147         config_get_refspecs = !(refspec_nr || all || tags);
 148
 149         git_config(get_remote_config);
 150         return config_current_uri;
 151 }
 152
 153 static int get_branches_uri(const char *repo, const char *uri[MAX_URI])
 154 {
 155         const char *slash = strchr(repo, '/');
 156         int n = slash ? slash - repo : 1000;
 157         FILE *f = fopen(git_path("branches/%.*s", n, repo), "r");
 158         char *s, *p;
 159         int len;
 160
 161         if (!f)
 162                 return 0;
 163         s = fgets(buffer, BUF_SIZE, f);
 164         fclose(f);
 165         if (!s)
 166                 return 0;
 167         while (isspace(*s))
 168                 s++;
 169         if (!*s)
 170                 return 0;
 171         p = s + strlen(s);
 172         while (isspace(p[-1]))
 173                 *--p = 0;
 174         len = p - s;
 175         if (slash)
 176                 len += strlen(slash);
 177         p = xmalloc(len + 1);
 178         strcpy(p, s);
 179         if (slash)
 180                 strcat(p, slash);
 181         uri[0] = p;
 182         return 1;
 183 }
 184
 185 /*
 186  * Read remotes and branches file, fill the push target URI
 187  * list.  If there is no command line refspecs, read Push: lines
 188  * to set up the *refspec list as well.
 189  * return the number of push target URIs
 190  */
 191 static int read_config(const char *repo, const char *uri[MAX_URI])
 192 {
 193         int n;
 194
 195         if (*repo != '/') {
 196                 n = get_remotes_uri(repo, uri);
 197                 if (n > 0)
 198                         return n;
 199
 200                 n = get_config_remotes_uri(repo, uri);
 201                 if (n > 0)
 202                         return n;
 203
 204                 n = get_branches_uri(repo, uri);
 205                 if (n > 0)
 206                         return n;
 207         }
 208
 209         uri[0] = repo;
 210         return 1;
 211 }
 212
 213 static int do_push(const char *repo)
 214 {
 215         const char *uri[MAX_URI];
 216         int i, n;
 217         int common_argc;
 218         const char **argv;
 219         int argc;
 220
 221         n = read_config(repo, uri);
 222         if (n <= 0)
 223                 die("bad repository '%s'", repo);
 224
 225         argv = xmalloc((refspec_nr + 10) * sizeof(char *));
 226         argv[0] = "dummy-send-pack";
 227         argc = 1;
 228         if (all)
 229                 argv[argc++] = "--all";
 230         if (force)
 231                 argv[argc++] = "--force";
 232         if (execute)
 233                 argv[argc++] = execute;
 234         common_argc = argc;
 235
 236         for (i = 0; i < n; i++) {
 237                 int error;
 238                 int dest_argc = common_argc;
 239                 int dest_refspec_nr = refspec_nr;
 240                 const char **dest_refspec = refspec;
 241                 const char *dest = uri[i];
 242                 const char *sender = "git-send-pack";
 243                 if (!strncmp(dest, "http://", 7) ||
 244                     !strncmp(dest, "https://", 8))
 245                         sender = "git-http-push";
 246                 else if (thin)
 247                         argv[dest_argc++] = "--thin";
 248                 argv[0] = sender;
 249                 argv[dest_argc++] = dest;
 250                 while (dest_refspec_nr--)
 251                         argv[dest_argc++] = *dest_refspec++;
 252                 argv[dest_argc] = NULL;
 253                 error = run_command_v(argc, argv);
 254                 if (!error)
 255                         continue;
 256                 switch (error) {
 257                 case -ERR_RUN_COMMAND_FORK:
 258                         die("unable to fork for %s", sender);
 259                 case -ERR_RUN_COMMAND_EXEC:
 260                         die("unable to exec %s", sender);
 261                 case -ERR_RUN_COMMAND_WAITPID:
 262                 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
 263                 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
 264                 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
 265                         die("%s died with strange error", sender);
 266                 default:
 267                         return -error;
 268                 }
 269         }
 270         return 0;
 271 }
 272
 273 int cmd_push(int argc, const char **argv, char **envp)
 274 {
 275         int i;
 276         const char *repo = "origin";    // default repository
 277
 278         for (i = 1; i < argc; i++) {
 279                 const char *arg = argv[i];
 280
 281                 if (arg[0] != '-') {
 282                         repo = arg;
 283                         i++;
 284                         break;
 285                 }
 286                 if (!strcmp(arg, "--all")) {
 287                         all = 1;
 288                         continue;
 289                 }
 290                 if (!strcmp(arg, "--tags")) {
 291                         tags = 1;
 292                         continue;
 293                 }
 294                 if (!strcmp(arg, "--force")) {
 295                         force = 1;
 296                         continue;
 297                 }
 298                 if (!strcmp(arg, "--thin")) {
 299                         thin = 1;
 300                         continue;
 301                 }
 302                 if (!strcmp(arg, "--no-thin")) {
 303                         thin = 0;
 304                         continue;
 305                 }
 306                 if (!strncmp(arg, "--exec=", 7)) {
 307                         execute = arg;
 308                         continue;
 309                 }
 310                 usage(push_usage);
 311         }
 312         set_refspecs(argv + i, argc - i);
 313         return do_push(repo);
 314 }