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![Calvin Wan](/assets/img/avatar_default.png)
alloc_nr, ALLOC_GROW, and ALLOC_GROW_BY are commonly used macros for dynamic array allocation. Moving these macros to git-compat-util.h with the other alloc macros focuses alloc.[ch] to allocation for Git objects and additionally allows us to remove inclusions to alloc.h from files that solely used the above macros. Signed-off-by: Calvin Wan <calvinwan@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
295 lines
6.5 KiB
C
295 lines
6.5 KiB
C
#include "git-compat-util.h"
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#include "gettext.h"
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#include "hash.h"
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#include "hex.h"
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#include "strvec.h"
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#include "refs.h"
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#include "refspec.h"
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#include "strbuf.h"
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static struct refspec_item s_tag_refspec = {
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.force = 0,
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.pattern = 1,
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.matching = 0,
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.exact_sha1 = 0,
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.negative = 0,
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.src = "refs/tags/*",
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.dst = "refs/tags/*",
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};
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/* See TAG_REFSPEC for the string version */
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const struct refspec_item *tag_refspec = &s_tag_refspec;
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/*
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* Parses the provided refspec 'refspec' and populates the refspec_item 'item'.
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* Returns 1 if successful and 0 if the refspec is invalid.
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*/
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static int parse_refspec(struct refspec_item *item, const char *refspec, int fetch)
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{
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size_t llen;
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int is_glob;
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const char *lhs, *rhs;
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int flags;
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is_glob = 0;
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lhs = refspec;
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if (*lhs == '+') {
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item->force = 1;
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lhs++;
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} else if (*lhs == '^') {
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item->negative = 1;
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lhs++;
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}
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rhs = strrchr(lhs, ':');
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/* negative refspecs only have one side */
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if (item->negative && rhs)
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return 0;
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/*
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* Before going on, special case ":" (or "+:") as a refspec
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* for pushing matching refs.
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*/
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if (!fetch && rhs == lhs && rhs[1] == '\0') {
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item->matching = 1;
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return 1;
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}
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if (rhs) {
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size_t rlen = strlen(++rhs);
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is_glob = (1 <= rlen && strchr(rhs, '*'));
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item->dst = xstrndup(rhs, rlen);
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} else {
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item->dst = NULL;
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}
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llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
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if (1 <= llen && memchr(lhs, '*', llen)) {
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if ((rhs && !is_glob) || (!rhs && !item->negative && fetch))
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return 0;
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is_glob = 1;
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} else if (rhs && is_glob) {
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return 0;
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}
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item->pattern = is_glob;
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if (llen == 1 && *lhs == '@')
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item->src = xstrdup("HEAD");
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else
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item->src = xstrndup(lhs, llen);
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flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0);
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if (item->negative) {
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struct object_id unused;
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/*
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* Negative refspecs only have a LHS, which indicates a ref
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* (or pattern of refs) to exclude from other matches. This
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* can either be a simple ref, or a glob pattern. Exact sha1
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* match is not currently supported.
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*/
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if (!*item->src)
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return 0; /* negative refspecs must not be empty */
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else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused))
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return 0; /* negative refpsecs cannot be exact sha1 */
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else if (!check_refname_format(item->src, flags))
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; /* valid looking ref is ok */
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else
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return 0;
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/* the other rules below do not apply to negative refspecs */
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return 1;
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}
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if (fetch) {
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struct object_id unused;
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/* LHS */
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if (!*item->src)
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; /* empty is ok; it means "HEAD" */
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else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused))
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item->exact_sha1 = 1; /* ok */
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else if (!check_refname_format(item->src, flags))
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; /* valid looking ref is ok */
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else
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return 0;
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/* RHS */
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if (!item->dst)
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; /* missing is ok; it is the same as empty */
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else if (!*item->dst)
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; /* empty is ok; it means "do not store" */
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else if (!check_refname_format(item->dst, flags))
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; /* valid looking ref is ok */
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else
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return 0;
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} else {
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/*
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* LHS
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* - empty is allowed; it means delete.
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* - when wildcarded, it must be a valid looking ref.
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* - otherwise, it must be an extended SHA-1, but
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* there is no existing way to validate this.
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*/
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if (!*item->src)
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; /* empty is ok */
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else if (is_glob) {
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if (check_refname_format(item->src, flags))
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return 0;
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}
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else
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; /* anything goes, for now */
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/*
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* RHS
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* - missing is allowed, but LHS then must be a
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* valid looking ref.
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* - empty is not allowed.
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* - otherwise it must be a valid looking ref.
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*/
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if (!item->dst) {
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if (check_refname_format(item->src, flags))
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return 0;
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} else if (!*item->dst) {
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return 0;
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} else {
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if (check_refname_format(item->dst, flags))
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return 0;
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}
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}
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return 1;
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}
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int refspec_item_init(struct refspec_item *item, const char *refspec, int fetch)
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{
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memset(item, 0, sizeof(*item));
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return parse_refspec(item, refspec, fetch);
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}
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void refspec_item_init_or_die(struct refspec_item *item, const char *refspec,
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int fetch)
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{
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if (!refspec_item_init(item, refspec, fetch))
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die(_("invalid refspec '%s'"), refspec);
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}
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void refspec_item_clear(struct refspec_item *item)
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{
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FREE_AND_NULL(item->src);
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FREE_AND_NULL(item->dst);
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item->force = 0;
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item->pattern = 0;
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item->matching = 0;
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item->exact_sha1 = 0;
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}
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void refspec_init(struct refspec *rs, int fetch)
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{
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memset(rs, 0, sizeof(*rs));
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rs->fetch = fetch;
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}
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static void refspec_append_nodup(struct refspec *rs, char *refspec)
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{
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struct refspec_item item;
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refspec_item_init_or_die(&item, refspec, rs->fetch);
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ALLOC_GROW(rs->items, rs->nr + 1, rs->alloc);
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rs->items[rs->nr++] = item;
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ALLOC_GROW(rs->raw, rs->raw_nr + 1, rs->raw_alloc);
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rs->raw[rs->raw_nr++] = refspec;
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}
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void refspec_append(struct refspec *rs, const char *refspec)
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{
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refspec_append_nodup(rs, xstrdup(refspec));
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}
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void refspec_appendf(struct refspec *rs, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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refspec_append_nodup(rs, xstrvfmt(fmt, ap));
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va_end(ap);
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}
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void refspec_appendn(struct refspec *rs, const char **refspecs, int nr)
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{
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int i;
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for (i = 0; i < nr; i++)
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refspec_append(rs, refspecs[i]);
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}
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void refspec_clear(struct refspec *rs)
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{
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int i;
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for (i = 0; i < rs->nr; i++)
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refspec_item_clear(&rs->items[i]);
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FREE_AND_NULL(rs->items);
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rs->alloc = 0;
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rs->nr = 0;
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for (i = 0; i < rs->raw_nr; i++)
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free((char *)rs->raw[i]);
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FREE_AND_NULL(rs->raw);
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rs->raw_alloc = 0;
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rs->raw_nr = 0;
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rs->fetch = 0;
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}
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int valid_fetch_refspec(const char *fetch_refspec_str)
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{
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struct refspec_item refspec;
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int ret = refspec_item_init(&refspec, fetch_refspec_str, REFSPEC_FETCH);
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refspec_item_clear(&refspec);
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return ret;
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}
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int valid_remote_name(const char *name)
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{
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int result;
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struct strbuf refspec = STRBUF_INIT;
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strbuf_addf(&refspec, "refs/heads/test:refs/remotes/%s/test", name);
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result = valid_fetch_refspec(refspec.buf);
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strbuf_release(&refspec);
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return result;
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}
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void refspec_ref_prefixes(const struct refspec *rs,
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struct strvec *ref_prefixes)
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{
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int i;
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for (i = 0; i < rs->nr; i++) {
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const struct refspec_item *item = &rs->items[i];
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const char *prefix = NULL;
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if (item->exact_sha1 || item->negative)
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continue;
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if (rs->fetch == REFSPEC_FETCH)
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prefix = item->src;
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else if (item->dst)
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prefix = item->dst;
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else if (item->src && !item->exact_sha1)
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prefix = item->src;
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if (!prefix)
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continue;
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if (item->pattern) {
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const char *glob = strchr(prefix, '*');
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strvec_pushf(ref_prefixes, "%.*s",
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(int)(glob - prefix),
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prefix);
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} else {
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expand_ref_prefix(ref_prefixes, prefix);
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}
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}
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}
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