blob: a907df84c6732f52b18a5caaeb9762a2fcb717c2 [file] [log] [blame]
/*
* 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/errors.h"
#include "common.h"
#include "refspec.h"
#include "util.h"
#include "posix.h"
#include "refs.h"
int git_refspec__parse(git_refspec *refspec, const char *input, bool is_fetch)
{
// Ported from https://github.com/git/git/blob/f06d47e7e0d9db709ee204ed13a8a7486149f494/remote.c#L518-636
size_t llen;
int is_glob = 0;
const char *lhs, *rhs;
int flags;
assert(refspec && input);
memset(refspec, 0x0, sizeof(git_refspec));
refspec->push = !is_fetch;
lhs = input;
if (*lhs == '+') {
refspec->force = 1;
lhs++;
}
rhs = strrchr(lhs, ':');
/*
* Before going on, special case ":" (or "+:") as a refspec
* for matching refs.
*/
if (!is_fetch && rhs == lhs && rhs[1] == '\0') {
refspec->matching = 1;
return 0;
}
if (rhs) {
size_t rlen = strlen(++rhs);
is_glob = (1 <= rlen && strchr(rhs, '*'));
refspec->dst = git__strndup(rhs, rlen);
}
llen = (rhs ? (size_t)(rhs - lhs - 1) : strlen(lhs));
if (1 <= llen && memchr(lhs, '*', llen)) {
if ((rhs && !is_glob) || (!rhs && is_fetch))
goto invalid;
is_glob = 1;
} else if (rhs && is_glob)
goto invalid;
refspec->pattern = is_glob;
refspec->src = git__strndup(lhs, llen);
flags = GIT_REF_FORMAT_ALLOW_ONELEVEL | GIT_REF_FORMAT_REFSPEC_SHORTHAND
| (is_glob ? GIT_REF_FORMAT_REFSPEC_PATTERN : 0);
if (is_fetch) {
/*
* LHS
* - empty is allowed; it means HEAD.
* - otherwise it must be a valid looking ref.
*/
if (!*refspec->src)
; /* empty is ok */
else if (!git_reference__is_valid_name(refspec->src, flags))
goto invalid;
/*
* RHS
* - missing is ok, and is same as empty.
* - empty is ok; it means not to store.
* - otherwise it must be a valid looking ref.
*/
if (!refspec->dst)
; /* ok */
else if (!*refspec->dst)
; /* ok */
else if (!git_reference__is_valid_name(refspec->dst, flags))
goto invalid;
} else {
/*
* LHS
* - empty is allowed; it means delete.
* - when wildcarded, it must be a valid looking ref.
* - otherwise, it must be an extended SHA-1, but
* there is no existing way to validate this.
*/
if (!*refspec->src)
; /* empty is ok */
else if (is_glob) {
if (!git_reference__is_valid_name(refspec->src, flags))
goto invalid;
}
else {
; /* anything goes, for now */
}
/*
* RHS
* - missing is allowed, but LHS then must be a
* valid looking ref.
* - empty is not allowed.
* - otherwise it must be a valid looking ref.
*/
if (!refspec->dst) {
if (!git_reference__is_valid_name(refspec->src, flags))
goto invalid;
} else if (!*refspec->dst) {
goto invalid;
} else {
if (!git_reference__is_valid_name(refspec->dst, flags))
goto invalid;
}
}
refspec->string = git__strdup(input);
GITERR_CHECK_ALLOC(refspec->string);
return 0;
invalid:
return -1;
}
void git_refspec__free(git_refspec *refspec)
{
if (refspec == NULL)
return;
git__free(refspec->src);
git__free(refspec->dst);
git__free(refspec->string);
}
const char *git_refspec_src(const git_refspec *refspec)
{
return refspec == NULL ? NULL : refspec->src;
}
const char *git_refspec_dst(const git_refspec *refspec)
{
return refspec == NULL ? NULL : refspec->dst;
}
const char *git_refspec_string(const git_refspec *refspec)
{
return refspec == NULL ? NULL : refspec->string;
}
int git_refspec_force(const git_refspec *refspec)
{
assert(refspec);
return refspec->force;
}
int git_refspec_src_matches(const git_refspec *refspec, const char *refname)
{
if (refspec == NULL || refspec->src == NULL)
return false;
return (p_fnmatch(refspec->src, refname, 0) == 0);
}
int git_refspec_dst_matches(const git_refspec *refspec, const char *refname)
{
if (refspec == NULL || refspec->dst == NULL)
return false;
return (p_fnmatch(refspec->dst, refname, 0) == 0);
}
static int refspec_transform_internal(char *out, size_t outlen, const char *from, const char *to, const char *name)
{
size_t baselen, namelen;
baselen = strlen(to);
if (outlen <= baselen) {
giterr_set(GITERR_INVALID, "Reference name too long");
return GIT_EBUFS;
}
/*
* No '*' at the end means that it's mapped to one specific local
* branch, so no actual transformation is needed.
*/
if (to[baselen - 1] != '*') {
memcpy(out, to, baselen + 1); /* include '\0' */
return 0;
}
/* There's a '*' at the end, so remove its length */
baselen--;
/* skip the prefix, -1 is for the '*' */
name += strlen(from) - 1;
namelen = strlen(name);
if (outlen <= baselen + namelen) {
giterr_set(GITERR_INVALID, "Reference name too long");
return GIT_EBUFS;
}
memcpy(out, to, baselen);
memcpy(out + baselen, name, namelen + 1);
return 0;
}
int git_refspec_transform(char *out, size_t outlen, const git_refspec *spec, const char *name)
{
return refspec_transform_internal(out, outlen, spec->src, spec->dst, name);
}
int git_refspec_rtransform(char *out, size_t outlen, const git_refspec *spec, const char *name)
{
return refspec_transform_internal(out, outlen, spec->dst, spec->src, name);
}
static int refspec_transform(git_buf *out, const char *from, const char *to, const char *name)
{
if (git_buf_sets(out, to) < 0)
return -1;
/*
* No '*' at the end means that it's mapped to one specific
* branch, so no actual transformation is needed.
*/
if (git_buf_len(out) > 0 && out->ptr[git_buf_len(out) - 1] != '*')
return 0;
git_buf_truncate(out, git_buf_len(out) - 1); /* remove trailing '*' */
git_buf_puts(out, name + strlen(from) - 1);
if (git_buf_oom(out))
return -1;
return 0;
}
int git_refspec_transform_r(git_buf *out, const git_refspec *spec, const char *name)
{
return refspec_transform(out, spec->src, spec->dst, name);
}
int git_refspec_transform_l(git_buf *out, const git_refspec *spec, const char *name)
{
return refspec_transform(out, spec->dst, spec->src, name);
}
int git_refspec__serialize(git_buf *out, const git_refspec *refspec)
{
if (refspec->force)
git_buf_putc(out, '+');
git_buf_printf(out, "%s:%s",
refspec->src != NULL ? refspec->src : "",
refspec->dst != NULL ? refspec->dst : "");
return git_buf_oom(out) == false;
}
int git_refspec_is_wildcard(const git_refspec *spec)
{
assert(spec && spec->src);
return (spec->src[strlen(spec->src) - 1] == '*');
}
git_direction git_refspec_direction(const git_refspec *spec)
{
assert(spec);
return spec->push;
}