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-rw-r--r--remote-testsvn.c342
1 files changed, 342 insertions, 0 deletions
diff --git a/remote-testsvn.c b/remote-testsvn.c
new file mode 100644
index 0000000..51fba05
--- /dev/null
+++ b/remote-testsvn.c
@@ -0,0 +1,342 @@
+#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 = strchr(msg, '\n');
+ len = end ? end - msg : strlen(msg);
+
+ key = "Revision-number: ";
+ if (!prefixcmp(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;
+ }
+ msg += len + 1;
+ }
+ return 0;
+}
+
+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, &note))
+ 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 (!prefixcmp(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 argv_array svndump_argv = ARGV_ARRAY_INIT;
+ struct child_process svndump_proc;
+
+ 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, &note))
+ 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 {
+ memset(&svndump_proc, 0, sizeof(struct child_process));
+ svndump_proc.out = -1;
+ argv_array_push(&svndump_argv, "svnrdump");
+ argv_array_push(&svndump_argv, "dump");
+ argv_array_push(&svndump_argv, url);
+ argv_array_pushf(&svndump_argv, "-r%u:HEAD", startrev);
+ svndump_proc.argv = svndump_argv.argv;
+
+ code = start_command(&svndump_proc);
+ if (code)
+ die("Unable to start %s, code %d", svndump_proc.argv[0], 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", svndump_proc.argv[0], code);
+ argv_array_clear(&svndump_argv);
+ }
+
+ 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 (prefixcmp(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 (!prefixcmp(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, 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;
+
+ 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 (!prefixcmp(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(&notes_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(&notes_ref_sb);
+ strbuf_release(&marksfilename_sb);
+ return 0;
+}