--- /dev/null
+/*
+ * 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 "refspec.h"
+
+#include "buf.h"
+#include "refs.h"
+#include "util.h"
+#include "vector.h"
+#include "wildmatch.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 valid = 0;
+ unsigned int flags;
+
+ GIT_ASSERT_ARG(refspec);
+ GIT_ASSERT_ARG(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;
+ refspec->string = git__strdup(input);
+ GIT_ERROR_CHECK_ALLOC(refspec->string);
+ refspec->src = git__strdup("");
+ GIT_ERROR_CHECK_ALLOC(refspec->src);
+ refspec->dst = git__strdup("");
+ GIT_ERROR_CHECK_ALLOC(refspec->dst);
+ return 0;
+ }
+
+ if (rhs) {
+ size_t rlen = strlen(++rhs);
+ if (rlen || !is_fetch) {
+ 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_REFERENCE_FORMAT_ALLOW_ONELEVEL |
+ GIT_REFERENCE_FORMAT_REFSPEC_SHORTHAND |
+ (is_glob ? GIT_REFERENCE_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__name_is_valid(&valid, refspec->src, flags) < 0)
+ goto on_error;
+ else if (!valid)
+ 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__name_is_valid(&valid, refspec->dst, flags) < 0)
+ goto on_error;
+ else if (!valid)
+ 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__name_is_valid(&valid, refspec->src, flags) < 0)
+ goto on_error;
+ else if (!valid)
+ 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__name_is_valid(&valid, refspec->src, flags) < 0)
+ goto on_error;
+ else if (!valid)
+ goto invalid;
+ } else if (!*refspec->dst) {
+ goto invalid;
+ } else {
+ if (git_reference__name_is_valid(&valid, refspec->dst, flags) < 0)
+ goto on_error;
+ else if (!valid)
+ goto invalid;
+ }
+
+ /* if the RHS is empty, then it's a copy of the LHS */
+ if (!refspec->dst) {
+ refspec->dst = git__strdup(refspec->src);
+ GIT_ERROR_CHECK_ALLOC(refspec->dst);
+ }
+ }
+
+ refspec->string = git__strdup(input);
+ GIT_ERROR_CHECK_ALLOC(refspec->string);
+
+ return 0;
+
+invalid:
+ git_error_set(GIT_ERROR_INVALID,
+ "'%s' is not a valid refspec.", input);
+ git_refspec__dispose(refspec);
+ return GIT_EINVALIDSPEC;
+
+on_error:
+ git_refspec__dispose(refspec);
+ return -1;
+}
+
+void git_refspec__dispose(git_refspec *refspec)
+{
+ if (refspec == NULL)
+ return;
+
+ git__free(refspec->src);
+ git__free(refspec->dst);
+ git__free(refspec->string);
+
+ memset(refspec, 0x0, sizeof(git_refspec));
+}
+
+int git_refspec_parse(git_refspec **out_refspec, const char *input, int is_fetch)
+{
+ git_refspec *refspec;
+ GIT_ASSERT_ARG(out_refspec);
+ GIT_ASSERT_ARG(input);
+
+ *out_refspec = NULL;
+
+ refspec = git__malloc(sizeof(git_refspec));
+ GIT_ERROR_CHECK_ALLOC(refspec);
+
+ if (git_refspec__parse(refspec, input, !!is_fetch) != 0) {
+ git__free(refspec);
+ return -1;
+ }
+
+ *out_refspec = refspec;
+ return 0;
+}
+
+void git_refspec_free(git_refspec *refspec)
+{
+ git_refspec__dispose(refspec);
+ git__free(refspec);
+}
+
+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)
+{
+ GIT_ASSERT_ARG(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 (wildmatch(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 (wildmatch(refspec->dst, refname, 0) == 0);
+}
+
+static int refspec_transform(
+ git_str *out, const char *from, const char *to, const char *name)
+{
+ const char *from_star, *to_star;
+ size_t replacement_len, star_offset;
+
+ git_str_clear(out);
+
+ /*
+ * There are two parts to each side of a refspec, the bit
+ * before the star and the bit after it. The star can be in
+ * the middle of the pattern, so we need to look at each bit
+ * individually.
+ */
+ from_star = strchr(from, '*');
+ to_star = strchr(to, '*');
+
+ GIT_ASSERT(from_star && to_star);
+
+ /* star offset, both in 'from' and in 'name' */
+ star_offset = from_star - from;
+
+ /* the first half is copied over */
+ git_str_put(out, to, to_star - to);
+
+ /*
+ * Copy over the name, but exclude the trailing part in "from" starting
+ * after the glob
+ */
+ replacement_len = strlen(name + star_offset) - strlen(from_star + 1);
+ git_str_put(out, name + star_offset, replacement_len);
+
+ return git_str_puts(out, to_star + 1);
+}
+
+int git_refspec_transform(git_buf *out, const git_refspec *spec, const char *name)
+{
+ GIT_BUF_WRAP_PRIVATE(out, git_refspec__transform, spec, name);
+}
+
+int git_refspec__transform(git_str *out, const git_refspec *spec, const char *name)
+{
+ GIT_ASSERT_ARG(out);
+ GIT_ASSERT_ARG(spec);
+ GIT_ASSERT_ARG(name);
+
+ if (!git_refspec_src_matches(spec, name)) {
+ git_error_set(GIT_ERROR_INVALID, "ref '%s' doesn't match the source", name);
+ return -1;
+ }
+
+ if (!spec->pattern)
+ return git_str_puts(out, spec->dst ? spec->dst : "");
+
+ return refspec_transform(out, spec->src, spec->dst, name);
+}
+
+int git_refspec_rtransform(git_buf *out, const git_refspec *spec, const char *name)
+{
+ GIT_BUF_WRAP_PRIVATE(out, git_refspec__rtransform, spec, name);
+}
+
+int git_refspec__rtransform(git_str *out, const git_refspec *spec, const char *name)
+{
+ GIT_ASSERT_ARG(out);
+ GIT_ASSERT_ARG(spec);
+ GIT_ASSERT_ARG(name);
+
+ if (!git_refspec_dst_matches(spec, name)) {
+ git_error_set(GIT_ERROR_INVALID, "ref '%s' doesn't match the destination", name);
+ return -1;
+ }
+
+ if (!spec->pattern)
+ return git_str_puts(out, spec->src);
+
+ return refspec_transform(out, spec->dst, spec->src, name);
+}
+
+int git_refspec__serialize(git_str *out, const git_refspec *refspec)
+{
+ if (refspec->force)
+ git_str_putc(out, '+');
+
+ git_str_printf(out, "%s:%s",
+ refspec->src != NULL ? refspec->src : "",
+ refspec->dst != NULL ? refspec->dst : "");
+
+ return git_str_oom(out) == false;
+}
+
+int git_refspec_is_wildcard(const git_refspec *spec)
+{
+ GIT_ASSERT_ARG(spec);
+ GIT_ASSERT_ARG(spec->src);
+
+ return (spec->src[strlen(spec->src) - 1] == '*');
+}
+
+git_direction git_refspec_direction(const git_refspec *spec)
+{
+ GIT_ASSERT_ARG(spec);
+
+ return spec->push;
+}
+
+int git_refspec__dwim_one(git_vector *out, git_refspec *spec, git_vector *refs)
+{
+ git_str buf = GIT_STR_INIT;
+ size_t j, pos;
+ git_remote_head key;
+ git_refspec *cur;
+
+ const char *formatters[] = {
+ GIT_REFS_DIR "%s",
+ GIT_REFS_TAGS_DIR "%s",
+ GIT_REFS_HEADS_DIR "%s",
+ NULL
+ };
+
+ GIT_ASSERT_ARG(out);
+ GIT_ASSERT_ARG(spec);
+ GIT_ASSERT_ARG(refs);
+
+ cur = git__calloc(1, sizeof(git_refspec));
+ GIT_ERROR_CHECK_ALLOC(cur);
+
+ cur->force = spec->force;
+ cur->push = spec->push;
+ cur->pattern = spec->pattern;
+ cur->matching = spec->matching;
+ cur->string = git__strdup(spec->string);
+
+ /* shorthand on the lhs */
+ if (git__prefixcmp(spec->src, GIT_REFS_DIR)) {
+ for (j = 0; formatters[j]; j++) {
+ git_str_clear(&buf);
+ git_str_printf(&buf, formatters[j], spec->src);
+ GIT_ERROR_CHECK_ALLOC_STR(&buf);
+
+ key.name = (char *) git_str_cstr(&buf);
+ if (!git_vector_search(&pos, refs, &key)) {
+ /* we found something to match the shorthand, set src to that */
+ cur->src = git_str_detach(&buf);
+ }
+ }
+ }
+
+ /* No shorthands found, copy over the name */
+ if (cur->src == NULL && spec->src != NULL) {
+ cur->src = git__strdup(spec->src);
+ GIT_ERROR_CHECK_ALLOC(cur->src);
+ }
+
+ if (spec->dst && git__prefixcmp(spec->dst, GIT_REFS_DIR)) {
+ /* if it starts with "remotes" then we just prepend "refs/" */
+ if (!git__prefixcmp(spec->dst, "remotes/")) {
+ git_str_puts(&buf, GIT_REFS_DIR);
+ } else {
+ git_str_puts(&buf, GIT_REFS_HEADS_DIR);
+ }
+
+ git_str_puts(&buf, spec->dst);
+ GIT_ERROR_CHECK_ALLOC_STR(&buf);
+
+ cur->dst = git_str_detach(&buf);
+ }
+
+ git_str_dispose(&buf);
+
+ if (cur->dst == NULL && spec->dst != NULL) {
+ cur->dst = git__strdup(spec->dst);
+ GIT_ERROR_CHECK_ALLOC(cur->dst);
+ }
+
+ return git_vector_insert(out, cur);
+}
projects / libgit2.git / blobdiff