45eba9f2d9d2ff51c08b7700da8edd02c1ca5f56
   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
  11static const char *url;
  12static int dump_from_file;
  13static const char *private_ref;
  14static const char *remote_ref = "refs/heads/master";
  15static const char *marksfilename;
  16
  17static int cmd_capabilities(const char *line);
  18static int cmd_import(const char *line);
  19static int cmd_list(const char *line);
  20
  21typedef int (*input_command_handler)(const char *);
  22struct 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
  28static 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
  35static 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
  44static void terminate_batch(void)
  45{
  46        /* terminate a current batch's fast-import stream */
  47        printf("done\n");
  48        fflush(stdout);
  49}
  50
  51static 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
  97static int cmd_list(const char *line)
  98{
  99        printf("? %s\n\n", remote_ref);
 100        fflush(stdout);
 101        return 0;
 102}
 103
 104static 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
 150int 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}