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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_object_file(note_oid, &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_object_file(note_oid, &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)) | |
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; | |
} |