Pileus Git - ~andy/git/blob - remote-testsvn.c

   1 #include "cache.h"
   2 #include "remote.h"
   3 #include "strbuf.h"
   4 #include "url.h"
   5 #include "exec_cmd.h"
   6 #include "run-command.h"
   7 #include "vcs-svn/svndump.h"
   8 #include "notes.h"
   9 #include "argv-array.h"
  10
  11 static const char *url;
  12 static const char *private_ref;
  13 static const char *remote_ref = "refs/heads/master";
  14
  15 static int cmd_capabilities(const char *line);
  16 static int cmd_import(const char *line);
  17 static int cmd_list(const char *line);
  18
  19 typedef int (*input_command_handler)(const char *);
  20 struct input_command_entry {
  21         const char *name;
  22         input_command_handler fn;
  23         unsigned char batchable;        /* whether the command starts or is part of a batch */
  24 };
  25
  26 static const struct input_command_entry input_command_list[] = {
  27         { "capabilities", cmd_capabilities, 0 },
  28         { "import", cmd_import, 1 },
  29         { "list", cmd_list, 0 },
  30         { NULL, NULL }
  31 };
  32
  33 static int cmd_capabilities(const char *line)
  34 {
  35         printf("import\n");
  36         printf("bidi-import\n");
  37         printf("refspec %s:%s\n\n", remote_ref, private_ref);
  38         fflush(stdout);
  39         return 0;
  40 }
  41
  42 static void terminate_batch(void)
  43 {
  44         /* terminate a current batch's fast-import stream */
  45         printf("done\n");
  46         fflush(stdout);
  47 }
  48
  49 static int cmd_import(const char *line)
  50 {
  51         int code;
  52         int dumpin_fd;
  53         unsigned int startrev = 0;
  54         struct argv_array svndump_argv = ARGV_ARRAY_INIT;
  55         struct child_process svndump_proc;
  56
  57         memset(&svndump_proc, 0, sizeof(struct child_process));
  58         svndump_proc.out = -1;
  59         argv_array_push(&svndump_argv, "svnrdump");
  60         argv_array_push(&svndump_argv, "dump");
  61         argv_array_push(&svndump_argv, url);
  62         argv_array_pushf(&svndump_argv, "-r%u:HEAD", startrev);
  63         svndump_proc.argv = svndump_argv.argv;
  64
  65         code = start_command(&svndump_proc);
  66         if (code)
  67                 die("Unable to start %s, code %d", svndump_proc.argv[0], code);
  68         dumpin_fd = svndump_proc.out;
  69
  70         svndump_init_fd(dumpin_fd, STDIN_FILENO);
  71         svndump_read(url, private_ref);
  72         svndump_deinit();
  73         svndump_reset();
  74
  75         close(dumpin_fd);
  76         code = finish_command(&svndump_proc);
  77         if (code)
  78                 warning("%s, returned %d", svndump_proc.argv[0], code);
  79         argv_array_clear(&svndump_argv);
  80
  81         return 0;
  82 }
  83
  84 static int cmd_list(const char *line)
  85 {
  86         printf("? %s\n\n", remote_ref);
  87         fflush(stdout);
  88         return 0;
  89 }
  90
  91 static int do_command(struct strbuf *line)
  92 {
  93         const struct input_command_entry *p = input_command_list;
  94         static struct string_list batchlines = STRING_LIST_INIT_DUP;
  95         static const struct input_command_entry *batch_cmd;
  96         /*
  97          * commands can be grouped together in a batch.
  98          * Batches are ended by \n. If no batch is active the program ends.
  99          * During a batch all lines are buffered and passed to the handler function
 100          * when the batch is terminated.
 101          */
 102         if (line->len == 0) {
 103                 if (batch_cmd) {
 104                         struct string_list_item *item;
 105                         for_each_string_list_item(item, &batchlines)
 106                                 batch_cmd->fn(item->string);
 107                         terminate_batch();
 108                         batch_cmd = NULL;
 109                         string_list_clear(&batchlines, 0);
 110                         return 0;       /* end of the batch, continue reading other commands. */
 111                 }
 112                 return 1;       /* end of command stream, quit */
 113         }
 114         if (batch_cmd) {
 115                 if (prefixcmp(batch_cmd->name, line->buf))
 116                         die("Active %s batch interrupted by %s", batch_cmd->name, line->buf);
 117                 /* buffer batch lines */
 118                 string_list_append(&batchlines, line->buf);
 119                 return 0;
 120         }
 121
 122         for (p = input_command_list; p->name; p++) {
 123                 if (!prefixcmp(line->buf, p->name) && (strlen(p->name) == line->len ||
 124                                 line->buf[strlen(p->name)] == ' ')) {
 125                         if (p->batchable) {
 126                                 batch_cmd = p;
 127                                 string_list_append(&batchlines, line->buf);
 128                                 return 0;
 129                         }
 130                         return p->fn(line->buf);
 131                 }
 132         }
 133         die("Unknown command '%s'\n", line->buf);
 134         return 0;
 135 }
 136
 137 int main(int argc, const char **argv)
 138 {
 139         struct strbuf buf = STRBUF_INIT, url_sb = STRBUF_INIT,
 140                         private_ref_sb = STRBUF_INIT;
 141         static struct remote *remote;
 142         const char *url_in;
 143
 144         git_extract_argv0_path(argv[0]);
 145         setup_git_directory();
 146         if (argc < 2 || argc > 3) {
 147                 usage("git-remote-svn <remote-name> [<url>]");
 148                 return 1;
 149         }
 150
 151         remote = remote_get(argv[1]);
 152         url_in = (argc == 3) ? argv[2] : remote->url[0];
 153
 154         end_url_with_slash(&url_sb, url_in);
 155         url = url_sb.buf;
 156
 157         strbuf_addf(&private_ref_sb, "refs/svn/%s/master", remote->name);
 158         private_ref = private_ref_sb.buf;
 159
 160         while (1) {
 161                 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
 162                         if (ferror(stdin))
 163                                 die("Error reading command stream");
 164                         else
 165                                 die("Unexpected end of command stream");
 166                 }
 167                 if (do_command(&buf))
 168                         break;
 169                 strbuf_reset(&buf);
 170         }
 171
 172         strbuf_release(&buf);
 173         strbuf_release(&url_sb);
 174         strbuf_release(&private_ref_sb);
 175         return 0;
 176 }