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 int dump_from_file;
  13 static const char *private_ref;
  14 static const char *remote_ref = "refs/heads/master";
  15 static const char *marksfilename;
  16
  17 static int cmd_capabilities(const char *line);
  18 static int cmd_import(const char *line);
  19 static int cmd_list(const char *line);
  20
  21 typedef int (*input_command_handler)(const char *);
  22 struct input_command_entry {
  23         const char *name;
  24         input_command_handler fn;
  25         unsigned char batchable;        /* whether the command starts or is part of a batch */
  26 };
  27
  28 static const struct input_command_entry input_command_list[] = {
  29         { "capabilities", cmd_capabilities, 0 },
  30         { "import", cmd_import, 1 },
  31         { "list", cmd_list, 0 },
  32         { NULL, NULL }
  33 };
  34
  35 static int cmd_capabilities(const char *line)
  36 {
  37         printf("import\n");
  38         printf("bidi-import\n");
  39         printf("refspec %s:%s\n\n", remote_ref, private_ref);
  40         fflush(stdout);
  41         return 0;
  42 }
  43
  44 static void terminate_batch(void)
  45 {
  46         /* terminate a current batch's fast-import stream */
  47         printf("done\n");
  48         fflush(stdout);
  49 }
  50
  51 static int cmd_import(const char *line)
  52 {
  53         int code;
  54         int dumpin_fd;
  55         unsigned int startrev = 0;
  56         struct argv_array svndump_argv = ARGV_ARRAY_INIT;
  57         struct child_process svndump_proc;
  58
  59         if (dump_from_file) {
  60                 dumpin_fd = open(url, O_RDONLY);
  61                 if(dumpin_fd < 0)
  62                         die_errno("Couldn't open svn dump file %s.", url);
  63         } else {
  64                 memset(&svndump_proc, 0, sizeof(struct child_process));
  65                 svndump_proc.out = -1;
  66                 argv_array_push(&svndump_argv, "svnrdump");
  67                 argv_array_push(&svndump_argv, "dump");
  68                 argv_array_push(&svndump_argv, url);
  69                 argv_array_pushf(&svndump_argv, "-r%u:HEAD", startrev);
  70                 svndump_proc.argv = svndump_argv.argv;
  71
  72                 code = start_command(&svndump_proc);
  73                 if (code)
  74                         die("Unable to start %s, code %d", svndump_proc.argv[0], code);
  75                 dumpin_fd = svndump_proc.out;
  76         }
  77         /* setup marks file import/export */
  78         printf("feature import-marks-if-exists=%s\n"
  79                         "feature export-marks=%s\n", marksfilename, marksfilename);
  80
  81         svndump_init_fd(dumpin_fd, STDIN_FILENO);
  82         svndump_read(url, private_ref);
  83         svndump_deinit();
  84         svndump_reset();
  85
  86         close(dumpin_fd);
  87         if (!dump_from_file) {
  88                 code = finish_command(&svndump_proc);
  89                 if (code)
  90                         warning("%s, returned %d", svndump_proc.argv[0], code);
  91                 argv_array_clear(&svndump_argv);
  92         }
  93
  94         return 0;
  95 }
  96
  97 static int cmd_list(const char *line)
  98 {
  99         printf("? %s\n\n", remote_ref);
 100         fflush(stdout);
 101         return 0;
 102 }
 103
 104 static int do_command(struct strbuf *line)
 105 {
 106         const struct input_command_entry *p = input_command_list;
 107         static struct string_list batchlines = STRING_LIST_INIT_DUP;
 108         static const struct input_command_entry *batch_cmd;
 109         /*
 110          * commands can be grouped together in a batch.
 111          * Batches are ended by \n. If no batch is active the program ends.
 112          * During a batch all lines are buffered and passed to the handler function
 113          * when the batch is terminated.
 114          */
 115         if (line->len == 0) {
 116                 if (batch_cmd) {
 117                         struct string_list_item *item;
 118                         for_each_string_list_item(item, &batchlines)
 119                                 batch_cmd->fn(item->string);
 120                         terminate_batch();
 121                         batch_cmd = NULL;
 122                         string_list_clear(&batchlines, 0);
 123                         return 0;       /* end of the batch, continue reading other commands. */
 124                 }
 125                 return 1;       /* end of command stream, quit */
 126         }
 127         if (batch_cmd) {
 128                 if (prefixcmp(batch_cmd->name, line->buf))
 129                         die("Active %s batch interrupted by %s", batch_cmd->name, line->buf);
 130                 /* buffer batch lines */
 131                 string_list_append(&batchlines, line->buf);
 132                 return 0;
 133         }
 134
 135         for (p = input_command_list; p->name; p++) {
 136                 if (!prefixcmp(line->buf, p->name) && (strlen(p->name) == line->len ||
 137                                 line->buf[strlen(p->name)] == ' ')) {
 138                         if (p->batchable) {
 139                                 batch_cmd = p;
 140                                 string_list_append(&batchlines, line->buf);
 141                                 return 0;
 142                         }
 143                         return p->fn(line->buf);
 144                 }
 145         }
 146         die("Unknown command '%s'\n", line->buf);
 147         return 0;
 148 }
 149
 150 int main(int argc, const char **argv)
 151 {
 152         struct strbuf buf = STRBUF_INIT, url_sb = STRBUF_INIT,
 153                         private_ref_sb = STRBUF_INIT, marksfilename_sb = STRBUF_INIT;
 154         static struct remote *remote;
 155         const char *url_in;
 156
 157         git_extract_argv0_path(argv[0]);
 158         setup_git_directory();
 159         if (argc < 2 || argc > 3) {
 160                 usage("git-remote-svn <remote-name> [<url>]");
 161                 return 1;
 162         }
 163
 164         remote = remote_get(argv[1]);
 165         url_in = (argc == 3) ? argv[2] : remote->url[0];
 166
 167         if (!prefixcmp(url_in, "file://")) {
 168                 dump_from_file = 1;
 169                 url = url_decode(url_in + sizeof("file://")-1);
 170         } else {
 171                 dump_from_file = 0;
 172                 end_url_with_slash(&url_sb, url_in);
 173                 url = url_sb.buf;
 174         }
 175
 176         strbuf_addf(&private_ref_sb, "refs/svn/%s/master", remote->name);
 177         private_ref = private_ref_sb.buf;
 178
 179         strbuf_addf(&marksfilename_sb, "%s/info/fast-import/remote-svn/%s.marks",
 180                 get_git_dir(), remote->name);
 181         marksfilename = marksfilename_sb.buf;
 182
 183         while (1) {
 184                 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
 185                         if (ferror(stdin))
 186                                 die("Error reading command stream");
 187                         else
 188                                 die("Unexpected end of command stream");
 189                 }
 190                 if (do_command(&buf))
 191                         break;
 192                 strbuf_reset(&buf);
 193         }
 194
 195         strbuf_release(&buf);
 196         strbuf_release(&url_sb);
 197         strbuf_release(&private_ref_sb);
 198         strbuf_release(&marksfilename_sb);
 199         return 0;
 200 }