#include "cache.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 unsigned char sha1[20]) { const unsigned char *note_sha1; char *msg = NULL; unsigned long msglen; enum object_type type; init_notes(NULL, notes_ref, NULL, 0); if (!(note_sha1 = get_note(NULL, sha1))) return NULL; /* note tree not found */ if (!(msg = read_sha1_file(note_sha1, &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(msg); msg = NULL; } 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 unsigned char *object_sha1, const unsigned char *note_sha1, 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_sha1, &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, sha1_to_hex(object_sha1)) < 1) return 3; return 0; } static void regenerate_marks(void) { int ret; FILE *marksfile = fopen(marksfilename, "w+"); if (!marksfile) die_errno("Couldn't create mark file %s.", marksfilename); 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 = fopen(marksfilename, "r"); if (!marksfile) die_errno("cannot read marks file %s!", marksfilename); fclose(marksfile); } else { strbuf_addf(&sb, ":%d ", latestrev); while (strbuf_getline(&line, marksfile, '\n') != 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; unsigned char head_sha1[20]; unsigned int startrev; struct child_process svndump_proc = CHILD_PROCESS_INIT; const char *command = "svnrdump"; if (read_ref(private_ref, head_sha1)) startrev = 0; else { note_msg = read_ref_note(head_sha1); 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 main(int argc, 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; git_extract_argv0_path(argv[0]); 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(&buf, stdin, '\n') == 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; }