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| #include "cache.h" | |
| #include "refs.h" | |
| #include "remote.h" | |
| #include "strbuf.h" | |
| #include "url.h" | |
| #include "exec_cmd.h" | |
| #include "run-command.h" | |
| #include "vcs-svn/svndump.h" | |
| #include "notes.h" | |
| #include "argv-array.h" | |
| static const char *url; | |
| static int dump_from_file; | |
| static const char *private_ref; | |
| static const char *remote_ref = "refs/heads/master"; | |
| static const char *marksfilename, *notes_ref; | |
| struct rev_note { unsigned int rev_nr; }; | |
| static int cmd_capabilities(const char *line); | |
| static int cmd_import(const char *line); | |
| static int cmd_list(const char *line); | |
| typedef int (*input_command_handler)(const char *); | |
| struct input_command_entry { | |
| const char *name; | |
| input_command_handler fn; | |
| unsigned char batchable; /* whether the command starts or is part of a batch */ | |
| }; | |
| static const struct input_command_entry input_command_list[] = { | |
| { "capabilities", cmd_capabilities, 0 }, | |
| { "import", cmd_import, 1 }, | |
| { "list", cmd_list, 0 }, | |
| { NULL, NULL } | |
| }; | |
| static int cmd_capabilities(const char *line) | |
| { | |
| printf("import\n"); | |
| printf("bidi-import\n"); | |
| printf("refspec %s:%s\n\n", remote_ref, private_ref); | |
| fflush(stdout); | |
| return 0; | |
| } | |
| static void terminate_batch(void) | |
| { | |
| /* terminate a current batch's fast-import stream */ | |
| printf("done\n"); | |
| fflush(stdout); | |
| } | |
| /* NOTE: 'ref' refers to a git reference, while 'rev' refers to a svn revision. */ | |
| static char *read_ref_note(const struct object_id *oid) | |
| { | |
| const struct object_id *note_oid; | |
| char *msg = NULL; | |
| unsigned long msglen; | |
| enum object_type type; | |
| init_notes(NULL, notes_ref, NULL, 0); | |
| if (!(note_oid = get_note(NULL, oid))) | |
| return NULL; /* note tree not found */ | |
| if (!(msg = read_sha1_file(note_oid->hash, &type, &msglen))) | |
| error("Empty notes tree. %s", notes_ref); | |
| else if (!msglen || type != OBJ_BLOB) { | |
| error("Note contains unusable content. " | |
| "Is something else using this notes tree? %s", notes_ref); | |
| FREE_AND_NULL(msg); | |
| } | |
| free_notes(NULL); | |
| return msg; | |
| } | |
| static int parse_rev_note(const char *msg, struct rev_note *res) | |
| { | |
| const char *key, *value, *end; | |
| size_t len; | |
| while (*msg) { | |
| end = strchrnul(msg, '\n'); | |
| len = end - msg; | |
| key = "Revision-number: "; | |
| if (starts_with(msg, key)) { | |
| long i; | |
| char *end; | |
| value = msg + strlen(key); | |
| i = strtol(value, &end, 0); | |
| if (end == value || i < 0 || i > UINT32_MAX) | |
| return -1; | |
| res->rev_nr = i; | |
| return 0; | |
| } | |
| msg += len + 1; | |
| } | |
| /* didn't find it */ | |
| return -1; | |
| } | |
| static int note2mark_cb(const struct object_id *object_oid, | |
| const struct object_id *note_oid, char *note_path, | |
| void *cb_data) | |
| { | |
| FILE *file = (FILE *)cb_data; | |
| char *msg; | |
| unsigned long msglen; | |
| enum object_type type; | |
| struct rev_note note; | |
| if (!(msg = read_sha1_file(note_oid->hash, &type, &msglen)) || | |
| !msglen || type != OBJ_BLOB) { | |
| free(msg); | |
| return 1; | |
| } | |
| if (parse_rev_note(msg, ¬e)) | |
| return 2; | |
| if (fprintf(file, ":%d %s\n", note.rev_nr, oid_to_hex(object_oid)) < 1) | |
| return 3; | |
| return 0; | |
| } | |
| static void regenerate_marks(void) | |
| { | |
| int ret; | |
| FILE *marksfile = xfopen(marksfilename, "w+"); | |
| ret = for_each_note(NULL, 0, note2mark_cb, marksfile); | |
| if (ret) | |
| die("Regeneration of marks failed, returned %d.", ret); | |
| fclose(marksfile); | |
| } | |
| static void check_or_regenerate_marks(int latestrev) | |
| { | |
| FILE *marksfile; | |
| struct strbuf sb = STRBUF_INIT; | |
| struct strbuf line = STRBUF_INIT; | |
| int found = 0; | |
| if (latestrev < 1) | |
| return; | |
| init_notes(NULL, notes_ref, NULL, 0); | |
| marksfile = fopen(marksfilename, "r"); | |
| if (!marksfile) { | |
| regenerate_marks(); | |
| marksfile = xfopen(marksfilename, "r"); | |
| fclose(marksfile); | |
| } else { | |
| strbuf_addf(&sb, ":%d ", latestrev); | |
| while (strbuf_getline_lf(&line, marksfile) != EOF) { | |
| if (starts_with(line.buf, sb.buf)) { | |
| found++; | |
| break; | |
| } | |
| } | |
| fclose(marksfile); | |
| if (!found) | |
| regenerate_marks(); | |
| } | |
| free_notes(NULL); | |
| strbuf_release(&sb); | |
| strbuf_release(&line); | |
| } | |
| static int cmd_import(const char *line) | |
| { | |
| int code; | |
| int dumpin_fd; | |
| char *note_msg; | |
| struct object_id head_oid; | |
| unsigned int startrev; | |
| struct child_process svndump_proc = CHILD_PROCESS_INIT; | |
| const char *command = "svnrdump"; | |
| if (read_ref(private_ref, head_oid.hash)) | |
| startrev = 0; | |
| else { | |
| note_msg = read_ref_note(&head_oid); | |
| if(note_msg == NULL) { | |
| warning("No note found for %s.", private_ref); | |
| startrev = 0; | |
| } else { | |
| struct rev_note note = { 0 }; | |
| if (parse_rev_note(note_msg, ¬e)) | |
| die("Revision number couldn't be parsed from note."); | |
| startrev = note.rev_nr + 1; | |
| free(note_msg); | |
| } | |
| } | |
| check_or_regenerate_marks(startrev - 1); | |
| if (dump_from_file) { | |
| dumpin_fd = open(url, O_RDONLY); | |
| if(dumpin_fd < 0) | |
| die_errno("Couldn't open svn dump file %s.", url); | |
| } else { | |
| svndump_proc.out = -1; | |
| argv_array_push(&svndump_proc.args, command); | |
| argv_array_push(&svndump_proc.args, "dump"); | |
| argv_array_push(&svndump_proc.args, url); | |
| argv_array_pushf(&svndump_proc.args, "-r%u:HEAD", startrev); | |
| code = start_command(&svndump_proc); | |
| if (code) | |
| die("Unable to start %s, code %d", command, code); | |
| dumpin_fd = svndump_proc.out; | |
| } | |
| /* setup marks file import/export */ | |
| printf("feature import-marks-if-exists=%s\n" | |
| "feature export-marks=%s\n", marksfilename, marksfilename); | |
| svndump_init_fd(dumpin_fd, STDIN_FILENO); | |
| svndump_read(url, private_ref, notes_ref); | |
| svndump_deinit(); | |
| svndump_reset(); | |
| close(dumpin_fd); | |
| if (!dump_from_file) { | |
| code = finish_command(&svndump_proc); | |
| if (code) | |
| warning("%s, returned %d", command, code); | |
| } | |
| return 0; | |
| } | |
| static int cmd_list(const char *line) | |
| { | |
| printf("? %s\n\n", remote_ref); | |
| fflush(stdout); | |
| return 0; | |
| } | |
| static int do_command(struct strbuf *line) | |
| { | |
| const struct input_command_entry *p = input_command_list; | |
| static struct string_list batchlines = STRING_LIST_INIT_DUP; | |
| static const struct input_command_entry *batch_cmd; | |
| /* | |
| * commands can be grouped together in a batch. | |
| * Batches are ended by \n. If no batch is active the program ends. | |
| * During a batch all lines are buffered and passed to the handler function | |
| * when the batch is terminated. | |
| */ | |
| if (line->len == 0) { | |
| if (batch_cmd) { | |
| struct string_list_item *item; | |
| for_each_string_list_item(item, &batchlines) | |
| batch_cmd->fn(item->string); | |
| terminate_batch(); | |
| batch_cmd = NULL; | |
| string_list_clear(&batchlines, 0); | |
| return 0; /* end of the batch, continue reading other commands. */ | |
| } | |
| return 1; /* end of command stream, quit */ | |
| } | |
| if (batch_cmd) { | |
| if (!starts_with(batch_cmd->name, line->buf)) | |
| die("Active %s batch interrupted by %s", batch_cmd->name, line->buf); | |
| /* buffer batch lines */ | |
| string_list_append(&batchlines, line->buf); | |
| return 0; | |
| } | |
| for (p = input_command_list; p->name; p++) { | |
| if (starts_with(line->buf, p->name) && (strlen(p->name) == line->len || | |
| line->buf[strlen(p->name)] == ' ')) { | |
| if (p->batchable) { | |
| batch_cmd = p; | |
| string_list_append(&batchlines, line->buf); | |
| return 0; | |
| } | |
| return p->fn(line->buf); | |
| } | |
| } | |
| die("Unknown command '%s'\n", line->buf); | |
| return 0; | |
| } | |
| int cmd_main(int argc, const char **argv) | |
| { | |
| struct strbuf buf = STRBUF_INIT, url_sb = STRBUF_INIT, | |
| private_ref_sb = STRBUF_INIT, marksfilename_sb = STRBUF_INIT, | |
| notes_ref_sb = STRBUF_INIT; | |
| static struct remote *remote; | |
| const char *url_in; | |
| setup_git_directory(); | |
| if (argc < 2 || argc > 3) { | |
| usage("git-remote-svn <remote-name> [<url>]"); | |
| return 1; | |
| } | |
| remote = remote_get(argv[1]); | |
| url_in = (argc == 3) ? argv[2] : remote->url[0]; | |
| if (starts_with(url_in, "file://")) { | |
| dump_from_file = 1; | |
| url = url_decode(url_in + sizeof("file://")-1); | |
| } else { | |
| dump_from_file = 0; | |
| end_url_with_slash(&url_sb, url_in); | |
| url = url_sb.buf; | |
| } | |
| strbuf_addf(&private_ref_sb, "refs/svn/%s/master", remote->name); | |
| private_ref = private_ref_sb.buf; | |
| strbuf_addf(¬es_ref_sb, "refs/notes/%s/revs", remote->name); | |
| notes_ref = notes_ref_sb.buf; | |
| strbuf_addf(&marksfilename_sb, "%s/info/fast-import/remote-svn/%s.marks", | |
| get_git_dir(), remote->name); | |
| marksfilename = marksfilename_sb.buf; | |
| while (1) { | |
| if (strbuf_getline_lf(&buf, stdin) == EOF) { | |
| if (ferror(stdin)) | |
| die("Error reading command stream"); | |
| else | |
| die("Unexpected end of command stream"); | |
| } | |
| if (do_command(&buf)) | |
| break; | |
| strbuf_reset(&buf); | |
| } | |
| strbuf_release(&buf); | |
| strbuf_release(&url_sb); | |
| strbuf_release(&private_ref_sb); | |
| strbuf_release(¬es_ref_sb); | |
| strbuf_release(&marksfilename_sb); | |
| return 0; | |
| } |