#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 {

};

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, &note))

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, &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 {

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(&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_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(&notes_ref_sb);

strbuf_release(&marksfilename_sb);

return 0;

}