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/*

* Copyright (C) the libgit2 contributors. All rights reserved.

*

* This file is part of libgit2, distributed under the GNU GPL v2 with

* a Linking Exception. For full terms see the included COPYING file.

*/

#include "git2/types.h"

#include "git2/oid.h"

#include "fetchhead.h"

#include "common.h"

#include "buffer.h"

#include "fileops.h"

#include "filebuf.h"

#include "refs.h"

#include "repository.h"

int git_fetchhead_ref_cmp(const void *a, const void *b)

{

const git_fetchhead_ref *one = (const git_fetchhead_ref *)a;

const git_fetchhead_ref *two = (const git_fetchhead_ref *)b;

if (one->is_merge && !two->is_merge)

return -1;

if (two->is_merge && !one->is_merge)

return 1;

if (one->ref_name && two->ref_name)

return strcmp(one->ref_name, two->ref_name);

else if (one->ref_name)

return -1;

else if (two->ref_name)

return 1;

return 0;

}

int git_fetchhead_ref_create(

git_fetchhead_ref **out,

git_oid *oid,

unsigned int is_merge,

const char *ref_name,

const char *remote_url)

{

git_fetchhead_ref *fetchhead_ref;

assert(out && oid);

*out = NULL;

fetchhead_ref = git__malloc(sizeof(git_fetchhead_ref));

GITERR_CHECK_ALLOC(fetchhead_ref);

memset(fetchhead_ref, 0x0, sizeof(git_fetchhead_ref));

git_oid_cpy(&fetchhead_ref->oid, oid);

fetchhead_ref->is_merge = is_merge;

if (ref_name)

fetchhead_ref->ref_name = git__strdup(ref_name);

if (remote_url)

fetchhead_ref->remote_url = git__strdup(remote_url);

*out = fetchhead_ref;

return 0;

}

static int fetchhead_ref_write(

git_filebuf *file,

git_fetchhead_ref *fetchhead_ref)

{

char oid[GIT_OID_HEXSZ + 1];

const char *type, *name;

assert(file && fetchhead_ref);

git_oid_fmt(oid, &fetchhead_ref->oid);

oid[GIT_OID_HEXSZ] = '\0';

if (git__prefixcmp(fetchhead_ref->ref_name, GIT_REFS_HEADS_DIR) == 0) {

type = "branch ";

name = fetchhead_ref->ref_name + strlen(GIT_REFS_HEADS_DIR);

} else if(git__prefixcmp(fetchhead_ref->ref_name,

GIT_REFS_TAGS_DIR) == 0) {

type = "tag ";

name = fetchhead_ref->ref_name + strlen(GIT_REFS_TAGS_DIR);

} else {

type = "";

name = fetchhead_ref->ref_name;

}

return git_filebuf_printf(file, "%s\t%s\t%s'%s' of %s\n",

oid,

(fetchhead_ref->is_merge) ? "" : "not-for-merge",

type,

name,

fetchhead_ref->remote_url);

}

int git_fetchhead_write(git_repository *repo, git_vector *fetchhead_refs)

{

git_filebuf file = GIT_FILEBUF_INIT;

git_buf path = GIT_BUF_INIT;

unsigned int i;

git_fetchhead_ref *fetchhead_ref;

assert(repo && fetchhead_refs);

if (git_buf_joinpath(&path, repo->path_repository, GIT_FETCH_HEAD_FILE) < 0)

return -1;

if (git_filebuf_open(&file, path.ptr, GIT_FILEBUF_FORCE) < 0) {

git_buf_free(&path);

return -1;

}

git_buf_free(&path);

git_vector_sort(fetchhead_refs);

git_vector_foreach(fetchhead_refs, i, fetchhead_ref)

fetchhead_ref_write(&file, fetchhead_ref);

return git_filebuf_commit(&file, GIT_REFS_FILE_MODE);

}

static int fetchhead_ref_parse(

git_oid *oid,

unsigned int *is_merge,

git_buf *ref_name,

const char **remote_url,

char *line,

size_t line_num)

{

char *oid_str, *is_merge_str, *desc, *name = NULL;

const char *type = NULL;

int error = 0;

*remote_url = NULL;

if (!*line) {

giterr_set(GITERR_FETCHHEAD,

"Empty line in FETCH_HEAD line %d", line_num);

return -1;

}

/* Compat with old git clients that wrote FETCH_HEAD like a loose ref. */

if ((oid_str = git__strsep(&line, "\t")) == NULL) {

oid_str = line;

line += strlen(line);

*is_merge = 1;

}

if (strlen(oid_str) != GIT_OID_HEXSZ) {

giterr_set(GITERR_FETCHHEAD,

"Invalid object ID in FETCH_HEAD line %d", line_num);

return -1;

}

if (git_oid_fromstr(oid, oid_str) < 0) {

const git_error *oid_err = giterr_last();

const char *err_msg = oid_err ? oid_err->message : "Invalid object ID";

giterr_set(GITERR_FETCHHEAD, "%s in FETCH_HEAD line %d",

err_msg, line_num);

return -1;

}

/* Parse new data from newer git clients */

if (*line) {

if ((is_merge_str = git__strsep(&line, "\t")) == NULL) {

giterr_set(GITERR_FETCHHEAD,

"Invalid description data in FETCH_HEAD line %d", line_num);

return -1;

}

if (*is_merge_str == '\0')

*is_merge = 1;

else if (strcmp(is_merge_str, "not-for-merge") == 0)

*is_merge = 0;

else {

giterr_set(GITERR_FETCHHEAD,

"Invalid for-merge entry in FETCH_HEAD line %d", line_num);

return -1;

}

if ((desc = line) == NULL) {

giterr_set(GITERR_FETCHHEAD,

"Invalid description in FETCH_HEAD line %d", line_num);

return -1;

}

if (git__prefixcmp(desc, "branch '") == 0) {

type = GIT_REFS_HEADS_DIR;

name = desc + 8;

} else if (git__prefixcmp(desc, "tag '") == 0) {

type = GIT_REFS_TAGS_DIR;

name = desc + 5;

} else if (git__prefixcmp(desc, "'") == 0)

name = desc + 1;

if (name) {

if ((desc = strchr(name, '\'')) == NULL ||

git__prefixcmp(desc, "' of ") != 0) {

giterr_set(GITERR_FETCHHEAD,

"Invalid description in FETCH_HEAD line %d", line_num);

return -1;

}

*desc = '\0';

desc += 5;

}

*remote_url = desc;

}

git_buf_clear(ref_name);

if (type)

git_buf_join(ref_name, '/', type, name);

else if(name)

git_buf_puts(ref_name, name);

return error;

}

int git_repository_fetchhead_foreach(git_repository *repo,

git_repository_fetchhead_foreach_cb cb,

void *payload)

{

git_buf path = GIT_BUF_INIT, file = GIT_BUF_INIT, name = GIT_BUF_INIT;

const char *ref_name;

git_oid oid;

const char *remote_url;

unsigned int is_merge = 0;

char *buffer, *line;

size_t line_num = 0;

int error = 0;

assert(repo && cb);

if (git_buf_joinpath(&path, repo->path_repository, GIT_FETCH_HEAD_FILE) < 0)

return -1;

if ((error = git_futils_readbuffer(&file, git_buf_cstr(&path))) < 0)

goto done;

buffer = file.ptr;

while ((line = git__strsep(&buffer, "\n")) != NULL) {

++line_num;

if ((error = fetchhead_ref_parse(&oid, &is_merge, &name, &remote_url,

line, line_num)) < 0)

goto done;

if (git_buf_len(&name) > 0)

ref_name = git_buf_cstr(&name);

else

ref_name = NULL;

if ((cb(ref_name, remote_url, &oid, is_merge, payload)) != 0) {

error = GIT_EUSER;

goto done;

}

}

if (*buffer) {

giterr_set(GITERR_FETCHHEAD, "No EOL at line %d", line_num+1);

error = -1;

goto done;

}

done:

git_buf_free(&file);

git_buf_free(&path);

git_buf_free(&name);

return error;

}

void git_fetchhead_ref_free(git_fetchhead_ref *fetchhead_ref)

{

if (fetchhead_ref == NULL)

return;

git__free(fetchhead_ref->remote_url);

git__free(fetchhead_ref->ref_name);

git__free(fetchhead_ref);

}