/*
* Copyright (C) 2009-2012 the libgit2 contributors
*
* 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;
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);
}
