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