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![Junio C Hamano](/assets/img/avatar_default.png)
More transition from "unsigned char[40]" to "struct object_id". This needed a few merge fixups, but is mostly disentangled from other topics. * bc/object-id: remote: convert functions to struct object_id Remove get_object_hash. Convert struct object to object_id Add several uses of get_object_hash. object: introduce get_object_hash macro. ref_newer: convert to use struct object_id push_refs_with_export: convert to struct object_id get_remote_heads: convert to struct object_id parse_fetch: convert to use struct object_id add_sought_entry_mem: convert to struct object_id Convert struct ref to use object_id. sha1_file: introduce has_object_file helper.
1085 lines
26 KiB
C
1085 lines
26 KiB
C
/*
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* The backend-independent part of the reference module.
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*/
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#include "cache.h"
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#include "lockfile.h"
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#include "refs.h"
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#include "refs/refs-internal.h"
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#include "object.h"
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#include "tag.h"
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/*
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* How to handle various characters in refnames:
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* 0: An acceptable character for refs
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* 1: End-of-component
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* 2: ., look for a preceding . to reject .. in refs
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* 3: {, look for a preceding @ to reject @{ in refs
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* 4: A bad character: ASCII control characters, and
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* ":", "?", "[", "\", "^", "~", SP, or TAB
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* 5: *, reject unless REFNAME_REFSPEC_PATTERN is set
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*/
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static unsigned char refname_disposition[256] = {
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1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 1,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 4,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 4, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 4, 4
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};
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/*
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* Try to read one refname component from the front of refname.
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* Return the length of the component found, or -1 if the component is
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* not legal. It is legal if it is something reasonable to have under
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* ".git/refs/"; We do not like it if:
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*
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* - any path component of it begins with ".", or
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* - it has double dots "..", or
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* - it has ASCII control characters, or
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* - it has ":", "?", "[", "\", "^", "~", SP, or TAB anywhere, or
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* - it has "*" anywhere unless REFNAME_REFSPEC_PATTERN is set, or
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* - it ends with a "/", or
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* - it ends with ".lock", or
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* - it contains a "@{" portion
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*/
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static int check_refname_component(const char *refname, int *flags)
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{
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const char *cp;
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char last = '\0';
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for (cp = refname; ; cp++) {
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int ch = *cp & 255;
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unsigned char disp = refname_disposition[ch];
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switch (disp) {
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case 1:
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goto out;
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case 2:
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if (last == '.')
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return -1; /* Refname contains "..". */
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break;
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case 3:
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if (last == '@')
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return -1; /* Refname contains "@{". */
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break;
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case 4:
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return -1;
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case 5:
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if (!(*flags & REFNAME_REFSPEC_PATTERN))
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return -1; /* refspec can't be a pattern */
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/*
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* Unset the pattern flag so that we only accept
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* a single asterisk for one side of refspec.
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*/
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*flags &= ~ REFNAME_REFSPEC_PATTERN;
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break;
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}
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last = ch;
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}
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out:
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if (cp == refname)
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return 0; /* Component has zero length. */
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if (refname[0] == '.')
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return -1; /* Component starts with '.'. */
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if (cp - refname >= LOCK_SUFFIX_LEN &&
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!memcmp(cp - LOCK_SUFFIX_LEN, LOCK_SUFFIX, LOCK_SUFFIX_LEN))
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return -1; /* Refname ends with ".lock". */
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return cp - refname;
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}
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int check_refname_format(const char *refname, int flags)
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{
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int component_len, component_count = 0;
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if (!strcmp(refname, "@"))
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/* Refname is a single character '@'. */
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return -1;
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while (1) {
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/* We are at the start of a path component. */
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component_len = check_refname_component(refname, &flags);
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if (component_len <= 0)
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return -1;
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component_count++;
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if (refname[component_len] == '\0')
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break;
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/* Skip to next component. */
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refname += component_len + 1;
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}
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if (refname[component_len - 1] == '.')
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return -1; /* Refname ends with '.'. */
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if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2)
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return -1; /* Refname has only one component. */
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return 0;
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}
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int refname_is_safe(const char *refname)
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{
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if (starts_with(refname, "refs/")) {
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char *buf;
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int result;
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buf = xmalloc(strlen(refname) + 1);
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/*
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* Does the refname try to escape refs/?
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* For example: refs/foo/../bar is safe but refs/foo/../../bar
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* is not.
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*/
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result = !normalize_path_copy(buf, refname + strlen("refs/"));
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free(buf);
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return result;
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}
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while (*refname) {
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if (!isupper(*refname) && *refname != '_')
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return 0;
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refname++;
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}
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return 1;
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}
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char *resolve_refdup(const char *refname, int resolve_flags,
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unsigned char *sha1, int *flags)
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{
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return xstrdup_or_null(resolve_ref_unsafe(refname, resolve_flags,
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sha1, flags));
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}
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/* The argument to filter_refs */
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struct ref_filter {
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const char *pattern;
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each_ref_fn *fn;
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void *cb_data;
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};
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int read_ref_full(const char *refname, int resolve_flags, unsigned char *sha1, int *flags)
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{
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if (resolve_ref_unsafe(refname, resolve_flags, sha1, flags))
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return 0;
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return -1;
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}
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int read_ref(const char *refname, unsigned char *sha1)
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{
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return read_ref_full(refname, RESOLVE_REF_READING, sha1, NULL);
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}
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int ref_exists(const char *refname)
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{
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unsigned char sha1[20];
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return !!resolve_ref_unsafe(refname, RESOLVE_REF_READING, sha1, NULL);
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}
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static int filter_refs(const char *refname, const struct object_id *oid,
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int flags, void *data)
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{
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struct ref_filter *filter = (struct ref_filter *)data;
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if (wildmatch(filter->pattern, refname, 0, NULL))
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return 0;
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return filter->fn(refname, oid, flags, filter->cb_data);
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}
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enum peel_status peel_object(const unsigned char *name, unsigned char *sha1)
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{
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struct object *o = lookup_unknown_object(name);
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if (o->type == OBJ_NONE) {
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int type = sha1_object_info(name, NULL);
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if (type < 0 || !object_as_type(o, type, 0))
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return PEEL_INVALID;
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}
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if (o->type != OBJ_TAG)
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return PEEL_NON_TAG;
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o = deref_tag_noverify(o);
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if (!o)
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return PEEL_INVALID;
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hashcpy(sha1, o->oid.hash);
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return PEEL_PEELED;
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}
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struct warn_if_dangling_data {
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FILE *fp;
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const char *refname;
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const struct string_list *refnames;
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const char *msg_fmt;
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};
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static int warn_if_dangling_symref(const char *refname, const struct object_id *oid,
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int flags, void *cb_data)
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{
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struct warn_if_dangling_data *d = cb_data;
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const char *resolves_to;
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struct object_id junk;
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if (!(flags & REF_ISSYMREF))
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return 0;
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resolves_to = resolve_ref_unsafe(refname, 0, junk.hash, NULL);
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if (!resolves_to
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|| (d->refname
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? strcmp(resolves_to, d->refname)
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: !string_list_has_string(d->refnames, resolves_to))) {
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return 0;
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}
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fprintf(d->fp, d->msg_fmt, refname);
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fputc('\n', d->fp);
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return 0;
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}
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void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname)
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{
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struct warn_if_dangling_data data;
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data.fp = fp;
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data.refname = refname;
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data.refnames = NULL;
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data.msg_fmt = msg_fmt;
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for_each_rawref(warn_if_dangling_symref, &data);
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}
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void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames)
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{
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struct warn_if_dangling_data data;
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data.fp = fp;
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data.refname = NULL;
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data.refnames = refnames;
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data.msg_fmt = msg_fmt;
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for_each_rawref(warn_if_dangling_symref, &data);
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}
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int for_each_tag_ref(each_ref_fn fn, void *cb_data)
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{
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return for_each_ref_in("refs/tags/", fn, cb_data);
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}
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int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data)
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{
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return for_each_ref_in_submodule(submodule, "refs/tags/", fn, cb_data);
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}
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int for_each_branch_ref(each_ref_fn fn, void *cb_data)
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{
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return for_each_ref_in("refs/heads/", fn, cb_data);
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}
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int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data)
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{
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return for_each_ref_in_submodule(submodule, "refs/heads/", fn, cb_data);
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}
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int for_each_remote_ref(each_ref_fn fn, void *cb_data)
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{
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return for_each_ref_in("refs/remotes/", fn, cb_data);
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}
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int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data)
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{
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return for_each_ref_in_submodule(submodule, "refs/remotes/", fn, cb_data);
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}
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int head_ref_namespaced(each_ref_fn fn, void *cb_data)
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{
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struct strbuf buf = STRBUF_INIT;
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int ret = 0;
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struct object_id oid;
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int flag;
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strbuf_addf(&buf, "%sHEAD", get_git_namespace());
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if (!read_ref_full(buf.buf, RESOLVE_REF_READING, oid.hash, &flag))
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ret = fn(buf.buf, &oid, flag, cb_data);
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strbuf_release(&buf);
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return ret;
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}
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int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
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const char *prefix, void *cb_data)
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{
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struct strbuf real_pattern = STRBUF_INIT;
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struct ref_filter filter;
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int ret;
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if (!prefix && !starts_with(pattern, "refs/"))
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strbuf_addstr(&real_pattern, "refs/");
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else if (prefix)
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strbuf_addstr(&real_pattern, prefix);
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strbuf_addstr(&real_pattern, pattern);
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if (!has_glob_specials(pattern)) {
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/* Append implied '/' '*' if not present. */
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strbuf_complete(&real_pattern, '/');
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/* No need to check for '*', there is none. */
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strbuf_addch(&real_pattern, '*');
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}
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filter.pattern = real_pattern.buf;
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filter.fn = fn;
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filter.cb_data = cb_data;
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ret = for_each_ref(filter_refs, &filter);
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strbuf_release(&real_pattern);
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return ret;
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}
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int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data)
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{
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return for_each_glob_ref_in(fn, pattern, NULL, cb_data);
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}
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const char *prettify_refname(const char *name)
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{
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return name + (
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starts_with(name, "refs/heads/") ? 11 :
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starts_with(name, "refs/tags/") ? 10 :
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starts_with(name, "refs/remotes/") ? 13 :
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0);
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}
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static const char *ref_rev_parse_rules[] = {
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"%.*s",
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"refs/%.*s",
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"refs/tags/%.*s",
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"refs/heads/%.*s",
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"refs/remotes/%.*s",
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"refs/remotes/%.*s/HEAD",
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NULL
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};
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int refname_match(const char *abbrev_name, const char *full_name)
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{
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const char **p;
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const int abbrev_name_len = strlen(abbrev_name);
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for (p = ref_rev_parse_rules; *p; p++) {
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if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) {
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return 1;
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}
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}
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return 0;
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}
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/*
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* *string and *len will only be substituted, and *string returned (for
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* later free()ing) if the string passed in is a magic short-hand form
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* to name a branch.
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*/
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static char *substitute_branch_name(const char **string, int *len)
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{
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struct strbuf buf = STRBUF_INIT;
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int ret = interpret_branch_name(*string, *len, &buf);
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if (ret == *len) {
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size_t size;
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*string = strbuf_detach(&buf, &size);
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*len = size;
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return (char *)*string;
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}
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return NULL;
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}
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int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
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{
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char *last_branch = substitute_branch_name(&str, &len);
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const char **p, *r;
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int refs_found = 0;
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*ref = NULL;
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for (p = ref_rev_parse_rules; *p; p++) {
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char fullref[PATH_MAX];
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unsigned char sha1_from_ref[20];
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unsigned char *this_result;
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int flag;
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this_result = refs_found ? sha1_from_ref : sha1;
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mksnpath(fullref, sizeof(fullref), *p, len, str);
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r = resolve_ref_unsafe(fullref, RESOLVE_REF_READING,
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this_result, &flag);
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if (r) {
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if (!refs_found++)
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*ref = xstrdup(r);
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if (!warn_ambiguous_refs)
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break;
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} else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD")) {
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warning("ignoring dangling symref %s.", fullref);
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} else if ((flag & REF_ISBROKEN) && strchr(fullref, '/')) {
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warning("ignoring broken ref %s.", fullref);
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}
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}
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free(last_branch);
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return refs_found;
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}
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int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
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{
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char *last_branch = substitute_branch_name(&str, &len);
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const char **p;
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int logs_found = 0;
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*log = NULL;
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for (p = ref_rev_parse_rules; *p; p++) {
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unsigned char hash[20];
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char path[PATH_MAX];
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const char *ref, *it;
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mksnpath(path, sizeof(path), *p, len, str);
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ref = resolve_ref_unsafe(path, RESOLVE_REF_READING,
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hash, NULL);
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if (!ref)
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continue;
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if (reflog_exists(path))
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it = path;
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else if (strcmp(ref, path) && reflog_exists(ref))
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it = ref;
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else
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continue;
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if (!logs_found++) {
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*log = xstrdup(it);
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hashcpy(sha1, hash);
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}
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if (!warn_ambiguous_refs)
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break;
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}
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free(last_branch);
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return logs_found;
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}
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static int is_per_worktree_ref(const char *refname)
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{
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return !strcmp(refname, "HEAD") ||
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starts_with(refname, "refs/bisect/");
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}
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static int is_pseudoref_syntax(const char *refname)
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{
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const char *c;
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for (c = refname; *c; c++) {
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if (!isupper(*c) && *c != '-' && *c != '_')
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return 0;
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}
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return 1;
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}
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enum ref_type ref_type(const char *refname)
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{
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if (is_per_worktree_ref(refname))
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return REF_TYPE_PER_WORKTREE;
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if (is_pseudoref_syntax(refname))
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return REF_TYPE_PSEUDOREF;
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return REF_TYPE_NORMAL;
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}
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static int write_pseudoref(const char *pseudoref, const unsigned char *sha1,
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const unsigned char *old_sha1, struct strbuf *err)
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{
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const char *filename;
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int fd;
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static struct lock_file lock;
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struct strbuf buf = STRBUF_INIT;
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int ret = -1;
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strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1));
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filename = git_path("%s", pseudoref);
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fd = hold_lock_file_for_update(&lock, filename, LOCK_DIE_ON_ERROR);
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if (fd < 0) {
|
|
strbuf_addf(err, "Could not open '%s' for writing: %s",
|
|
filename, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
if (old_sha1) {
|
|
unsigned char actual_old_sha1[20];
|
|
|
|
if (read_ref(pseudoref, actual_old_sha1))
|
|
die("could not read ref '%s'", pseudoref);
|
|
if (hashcmp(actual_old_sha1, old_sha1)) {
|
|
strbuf_addf(err, "Unexpected sha1 when writing %s", pseudoref);
|
|
rollback_lock_file(&lock);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (write_in_full(fd, buf.buf, buf.len) != buf.len) {
|
|
strbuf_addf(err, "Could not write to '%s'", filename);
|
|
rollback_lock_file(&lock);
|
|
goto done;
|
|
}
|
|
|
|
commit_lock_file(&lock);
|
|
ret = 0;
|
|
done:
|
|
strbuf_release(&buf);
|
|
return ret;
|
|
}
|
|
|
|
static int delete_pseudoref(const char *pseudoref, const unsigned char *old_sha1)
|
|
{
|
|
static struct lock_file lock;
|
|
const char *filename;
|
|
|
|
filename = git_path("%s", pseudoref);
|
|
|
|
if (old_sha1 && !is_null_sha1(old_sha1)) {
|
|
int fd;
|
|
unsigned char actual_old_sha1[20];
|
|
|
|
fd = hold_lock_file_for_update(&lock, filename,
|
|
LOCK_DIE_ON_ERROR);
|
|
if (fd < 0)
|
|
die_errno(_("Could not open '%s' for writing"), filename);
|
|
if (read_ref(pseudoref, actual_old_sha1))
|
|
die("could not read ref '%s'", pseudoref);
|
|
if (hashcmp(actual_old_sha1, old_sha1)) {
|
|
warning("Unexpected sha1 when deleting %s", pseudoref);
|
|
rollback_lock_file(&lock);
|
|
return -1;
|
|
}
|
|
|
|
unlink(filename);
|
|
rollback_lock_file(&lock);
|
|
} else {
|
|
unlink(filename);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int delete_ref(const char *refname, const unsigned char *old_sha1,
|
|
unsigned int flags)
|
|
{
|
|
struct ref_transaction *transaction;
|
|
struct strbuf err = STRBUF_INIT;
|
|
|
|
if (ref_type(refname) == REF_TYPE_PSEUDOREF)
|
|
return delete_pseudoref(refname, old_sha1);
|
|
|
|
transaction = ref_transaction_begin(&err);
|
|
if (!transaction ||
|
|
ref_transaction_delete(transaction, refname, old_sha1,
|
|
flags, NULL, &err) ||
|
|
ref_transaction_commit(transaction, &err)) {
|
|
error("%s", err.buf);
|
|
ref_transaction_free(transaction);
|
|
strbuf_release(&err);
|
|
return 1;
|
|
}
|
|
ref_transaction_free(transaction);
|
|
strbuf_release(&err);
|
|
return 0;
|
|
}
|
|
|
|
int copy_reflog_msg(char *buf, const char *msg)
|
|
{
|
|
char *cp = buf;
|
|
char c;
|
|
int wasspace = 1;
|
|
|
|
*cp++ = '\t';
|
|
while ((c = *msg++)) {
|
|
if (wasspace && isspace(c))
|
|
continue;
|
|
wasspace = isspace(c);
|
|
if (wasspace)
|
|
c = ' ';
|
|
*cp++ = c;
|
|
}
|
|
while (buf < cp && isspace(cp[-1]))
|
|
cp--;
|
|
*cp++ = '\n';
|
|
return cp - buf;
|
|
}
|
|
|
|
int should_autocreate_reflog(const char *refname)
|
|
{
|
|
if (!log_all_ref_updates)
|
|
return 0;
|
|
return starts_with(refname, "refs/heads/") ||
|
|
starts_with(refname, "refs/remotes/") ||
|
|
starts_with(refname, "refs/notes/") ||
|
|
!strcmp(refname, "HEAD");
|
|
}
|
|
|
|
int is_branch(const char *refname)
|
|
{
|
|
return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/");
|
|
}
|
|
|
|
struct read_ref_at_cb {
|
|
const char *refname;
|
|
unsigned long at_time;
|
|
int cnt;
|
|
int reccnt;
|
|
unsigned char *sha1;
|
|
int found_it;
|
|
|
|
unsigned char osha1[20];
|
|
unsigned char nsha1[20];
|
|
int tz;
|
|
unsigned long date;
|
|
char **msg;
|
|
unsigned long *cutoff_time;
|
|
int *cutoff_tz;
|
|
int *cutoff_cnt;
|
|
};
|
|
|
|
static int read_ref_at_ent(unsigned char *osha1, unsigned char *nsha1,
|
|
const char *email, unsigned long timestamp, int tz,
|
|
const char *message, void *cb_data)
|
|
{
|
|
struct read_ref_at_cb *cb = cb_data;
|
|
|
|
cb->reccnt++;
|
|
cb->tz = tz;
|
|
cb->date = timestamp;
|
|
|
|
if (timestamp <= cb->at_time || cb->cnt == 0) {
|
|
if (cb->msg)
|
|
*cb->msg = xstrdup(message);
|
|
if (cb->cutoff_time)
|
|
*cb->cutoff_time = timestamp;
|
|
if (cb->cutoff_tz)
|
|
*cb->cutoff_tz = tz;
|
|
if (cb->cutoff_cnt)
|
|
*cb->cutoff_cnt = cb->reccnt - 1;
|
|
/*
|
|
* we have not yet updated cb->[n|o]sha1 so they still
|
|
* hold the values for the previous record.
|
|
*/
|
|
if (!is_null_sha1(cb->osha1)) {
|
|
hashcpy(cb->sha1, nsha1);
|
|
if (hashcmp(cb->osha1, nsha1))
|
|
warning("Log for ref %s has gap after %s.",
|
|
cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822)));
|
|
}
|
|
else if (cb->date == cb->at_time)
|
|
hashcpy(cb->sha1, nsha1);
|
|
else if (hashcmp(nsha1, cb->sha1))
|
|
warning("Log for ref %s unexpectedly ended on %s.",
|
|
cb->refname, show_date(cb->date, cb->tz,
|
|
DATE_MODE(RFC2822)));
|
|
hashcpy(cb->osha1, osha1);
|
|
hashcpy(cb->nsha1, nsha1);
|
|
cb->found_it = 1;
|
|
return 1;
|
|
}
|
|
hashcpy(cb->osha1, osha1);
|
|
hashcpy(cb->nsha1, nsha1);
|
|
if (cb->cnt > 0)
|
|
cb->cnt--;
|
|
return 0;
|
|
}
|
|
|
|
static int read_ref_at_ent_oldest(unsigned char *osha1, unsigned char *nsha1,
|
|
const char *email, unsigned long timestamp,
|
|
int tz, const char *message, void *cb_data)
|
|
{
|
|
struct read_ref_at_cb *cb = cb_data;
|
|
|
|
if (cb->msg)
|
|
*cb->msg = xstrdup(message);
|
|
if (cb->cutoff_time)
|
|
*cb->cutoff_time = timestamp;
|
|
if (cb->cutoff_tz)
|
|
*cb->cutoff_tz = tz;
|
|
if (cb->cutoff_cnt)
|
|
*cb->cutoff_cnt = cb->reccnt;
|
|
hashcpy(cb->sha1, osha1);
|
|
if (is_null_sha1(cb->sha1))
|
|
hashcpy(cb->sha1, nsha1);
|
|
/* We just want the first entry */
|
|
return 1;
|
|
}
|
|
|
|
int read_ref_at(const char *refname, unsigned int flags, unsigned long at_time, int cnt,
|
|
unsigned char *sha1, char **msg,
|
|
unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt)
|
|
{
|
|
struct read_ref_at_cb cb;
|
|
|
|
memset(&cb, 0, sizeof(cb));
|
|
cb.refname = refname;
|
|
cb.at_time = at_time;
|
|
cb.cnt = cnt;
|
|
cb.msg = msg;
|
|
cb.cutoff_time = cutoff_time;
|
|
cb.cutoff_tz = cutoff_tz;
|
|
cb.cutoff_cnt = cutoff_cnt;
|
|
cb.sha1 = sha1;
|
|
|
|
for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb);
|
|
|
|
if (!cb.reccnt) {
|
|
if (flags & GET_SHA1_QUIETLY)
|
|
exit(128);
|
|
else
|
|
die("Log for %s is empty.", refname);
|
|
}
|
|
if (cb.found_it)
|
|
return 0;
|
|
|
|
for_each_reflog_ent(refname, read_ref_at_ent_oldest, &cb);
|
|
|
|
return 1;
|
|
}
|
|
|
|
struct ref_transaction *ref_transaction_begin(struct strbuf *err)
|
|
{
|
|
assert(err);
|
|
|
|
return xcalloc(1, sizeof(struct ref_transaction));
|
|
}
|
|
|
|
void ref_transaction_free(struct ref_transaction *transaction)
|
|
{
|
|
int i;
|
|
|
|
if (!transaction)
|
|
return;
|
|
|
|
for (i = 0; i < transaction->nr; i++) {
|
|
free(transaction->updates[i]->msg);
|
|
free(transaction->updates[i]);
|
|
}
|
|
free(transaction->updates);
|
|
free(transaction);
|
|
}
|
|
|
|
static struct ref_update *add_update(struct ref_transaction *transaction,
|
|
const char *refname)
|
|
{
|
|
size_t len = strlen(refname) + 1;
|
|
struct ref_update *update = xcalloc(1, sizeof(*update) + len);
|
|
|
|
memcpy((char *)update->refname, refname, len); /* includes NUL */
|
|
ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc);
|
|
transaction->updates[transaction->nr++] = update;
|
|
return update;
|
|
}
|
|
|
|
int ref_transaction_update(struct ref_transaction *transaction,
|
|
const char *refname,
|
|
const unsigned char *new_sha1,
|
|
const unsigned char *old_sha1,
|
|
unsigned int flags, const char *msg,
|
|
struct strbuf *err)
|
|
{
|
|
struct ref_update *update;
|
|
|
|
assert(err);
|
|
|
|
if (transaction->state != REF_TRANSACTION_OPEN)
|
|
die("BUG: update called for transaction that is not open");
|
|
|
|
if (new_sha1 && !is_null_sha1(new_sha1) &&
|
|
check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
|
|
strbuf_addf(err, "refusing to update ref with bad name %s",
|
|
refname);
|
|
return -1;
|
|
}
|
|
|
|
update = add_update(transaction, refname);
|
|
if (new_sha1) {
|
|
hashcpy(update->new_sha1, new_sha1);
|
|
flags |= REF_HAVE_NEW;
|
|
}
|
|
if (old_sha1) {
|
|
hashcpy(update->old_sha1, old_sha1);
|
|
flags |= REF_HAVE_OLD;
|
|
}
|
|
update->flags = flags;
|
|
if (msg)
|
|
update->msg = xstrdup(msg);
|
|
return 0;
|
|
}
|
|
|
|
int ref_transaction_create(struct ref_transaction *transaction,
|
|
const char *refname,
|
|
const unsigned char *new_sha1,
|
|
unsigned int flags, const char *msg,
|
|
struct strbuf *err)
|
|
{
|
|
if (!new_sha1 || is_null_sha1(new_sha1))
|
|
die("BUG: create called without valid new_sha1");
|
|
return ref_transaction_update(transaction, refname, new_sha1,
|
|
null_sha1, flags, msg, err);
|
|
}
|
|
|
|
int ref_transaction_delete(struct ref_transaction *transaction,
|
|
const char *refname,
|
|
const unsigned char *old_sha1,
|
|
unsigned int flags, const char *msg,
|
|
struct strbuf *err)
|
|
{
|
|
if (old_sha1 && is_null_sha1(old_sha1))
|
|
die("BUG: delete called with old_sha1 set to zeros");
|
|
return ref_transaction_update(transaction, refname,
|
|
null_sha1, old_sha1,
|
|
flags, msg, err);
|
|
}
|
|
|
|
int ref_transaction_verify(struct ref_transaction *transaction,
|
|
const char *refname,
|
|
const unsigned char *old_sha1,
|
|
unsigned int flags,
|
|
struct strbuf *err)
|
|
{
|
|
if (!old_sha1)
|
|
die("BUG: verify called with old_sha1 set to NULL");
|
|
return ref_transaction_update(transaction, refname,
|
|
NULL, old_sha1,
|
|
flags, NULL, err);
|
|
}
|
|
|
|
int update_ref(const char *msg, const char *refname,
|
|
const unsigned char *new_sha1, const unsigned char *old_sha1,
|
|
unsigned int flags, enum action_on_err onerr)
|
|
{
|
|
struct ref_transaction *t = NULL;
|
|
struct strbuf err = STRBUF_INIT;
|
|
int ret = 0;
|
|
|
|
if (ref_type(refname) == REF_TYPE_PSEUDOREF) {
|
|
ret = write_pseudoref(refname, new_sha1, old_sha1, &err);
|
|
} else {
|
|
t = ref_transaction_begin(&err);
|
|
if (!t ||
|
|
ref_transaction_update(t, refname, new_sha1, old_sha1,
|
|
flags, msg, &err) ||
|
|
ref_transaction_commit(t, &err)) {
|
|
ret = 1;
|
|
ref_transaction_free(t);
|
|
}
|
|
}
|
|
if (ret) {
|
|
const char *str = "update_ref failed for ref '%s': %s";
|
|
|
|
switch (onerr) {
|
|
case UPDATE_REFS_MSG_ON_ERR:
|
|
error(str, refname, err.buf);
|
|
break;
|
|
case UPDATE_REFS_DIE_ON_ERR:
|
|
die(str, refname, err.buf);
|
|
break;
|
|
case UPDATE_REFS_QUIET_ON_ERR:
|
|
break;
|
|
}
|
|
strbuf_release(&err);
|
|
return 1;
|
|
}
|
|
strbuf_release(&err);
|
|
if (t)
|
|
ref_transaction_free(t);
|
|
return 0;
|
|
}
|
|
|
|
char *shorten_unambiguous_ref(const char *refname, int strict)
|
|
{
|
|
int i;
|
|
static char **scanf_fmts;
|
|
static int nr_rules;
|
|
char *short_name;
|
|
|
|
if (!nr_rules) {
|
|
/*
|
|
* Pre-generate scanf formats from ref_rev_parse_rules[].
|
|
* Generate a format suitable for scanf from a
|
|
* ref_rev_parse_rules rule by interpolating "%s" at the
|
|
* location of the "%.*s".
|
|
*/
|
|
size_t total_len = 0;
|
|
size_t offset = 0;
|
|
|
|
/* the rule list is NULL terminated, count them first */
|
|
for (nr_rules = 0; ref_rev_parse_rules[nr_rules]; nr_rules++)
|
|
/* -2 for strlen("%.*s") - strlen("%s"); +1 for NUL */
|
|
total_len += strlen(ref_rev_parse_rules[nr_rules]) - 2 + 1;
|
|
|
|
scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len);
|
|
|
|
offset = 0;
|
|
for (i = 0; i < nr_rules; i++) {
|
|
assert(offset < total_len);
|
|
scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset;
|
|
offset += snprintf(scanf_fmts[i], total_len - offset,
|
|
ref_rev_parse_rules[i], 2, "%s") + 1;
|
|
}
|
|
}
|
|
|
|
/* bail out if there are no rules */
|
|
if (!nr_rules)
|
|
return xstrdup(refname);
|
|
|
|
/* buffer for scanf result, at most refname must fit */
|
|
short_name = xstrdup(refname);
|
|
|
|
/* skip first rule, it will always match */
|
|
for (i = nr_rules - 1; i > 0 ; --i) {
|
|
int j;
|
|
int rules_to_fail = i;
|
|
int short_name_len;
|
|
|
|
if (1 != sscanf(refname, scanf_fmts[i], short_name))
|
|
continue;
|
|
|
|
short_name_len = strlen(short_name);
|
|
|
|
/*
|
|
* in strict mode, all (except the matched one) rules
|
|
* must fail to resolve to a valid non-ambiguous ref
|
|
*/
|
|
if (strict)
|
|
rules_to_fail = nr_rules;
|
|
|
|
/*
|
|
* check if the short name resolves to a valid ref,
|
|
* but use only rules prior to the matched one
|
|
*/
|
|
for (j = 0; j < rules_to_fail; j++) {
|
|
const char *rule = ref_rev_parse_rules[j];
|
|
char refname[PATH_MAX];
|
|
|
|
/* skip matched rule */
|
|
if (i == j)
|
|
continue;
|
|
|
|
/*
|
|
* the short name is ambiguous, if it resolves
|
|
* (with this previous rule) to a valid ref
|
|
* read_ref() returns 0 on success
|
|
*/
|
|
mksnpath(refname, sizeof(refname),
|
|
rule, short_name_len, short_name);
|
|
if (ref_exists(refname))
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* short name is non-ambiguous if all previous rules
|
|
* haven't resolved to a valid ref
|
|
*/
|
|
if (j == rules_to_fail)
|
|
return short_name;
|
|
}
|
|
|
|
free(short_name);
|
|
return xstrdup(refname);
|
|
}
|
|
|
|
static struct string_list *hide_refs;
|
|
|
|
int parse_hide_refs_config(const char *var, const char *value, const char *section)
|
|
{
|
|
if (!strcmp("transfer.hiderefs", var) ||
|
|
/* NEEDSWORK: use parse_config_key() once both are merged */
|
|
(starts_with(var, section) && var[strlen(section)] == '.' &&
|
|
!strcmp(var + strlen(section), ".hiderefs"))) {
|
|
char *ref;
|
|
int len;
|
|
|
|
if (!value)
|
|
return config_error_nonbool(var);
|
|
ref = xstrdup(value);
|
|
len = strlen(ref);
|
|
while (len && ref[len - 1] == '/')
|
|
ref[--len] = '\0';
|
|
if (!hide_refs) {
|
|
hide_refs = xcalloc(1, sizeof(*hide_refs));
|
|
hide_refs->strdup_strings = 1;
|
|
}
|
|
string_list_append(hide_refs, ref);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ref_is_hidden(const char *refname, const char *refname_full)
|
|
{
|
|
int i;
|
|
|
|
if (!hide_refs)
|
|
return 0;
|
|
for (i = hide_refs->nr - 1; i >= 0; i--) {
|
|
const char *match = hide_refs->items[i].string;
|
|
const char *subject;
|
|
int neg = 0;
|
|
int len;
|
|
|
|
if (*match == '!') {
|
|
neg = 1;
|
|
match++;
|
|
}
|
|
|
|
if (*match == '^') {
|
|
subject = refname_full;
|
|
match++;
|
|
} else {
|
|
subject = refname;
|
|
}
|
|
|
|
/* refname can be NULL when namespaces are used. */
|
|
if (!subject || !starts_with(subject, match))
|
|
continue;
|
|
len = strlen(match);
|
|
if (!subject[len] || subject[len] == '/')
|
|
return !neg;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
const char *find_descendant_ref(const char *dirname,
|
|
const struct string_list *extras,
|
|
const struct string_list *skip)
|
|
{
|
|
int pos;
|
|
|
|
if (!extras)
|
|
return NULL;
|
|
|
|
/*
|
|
* Look at the place where dirname would be inserted into
|
|
* extras. If there is an entry at that position that starts
|
|
* with dirname (remember, dirname includes the trailing
|
|
* slash) and is not in skip, then we have a conflict.
|
|
*/
|
|
for (pos = string_list_find_insert_index(extras, dirname, 0);
|
|
pos < extras->nr; pos++) {
|
|
const char *extra_refname = extras->items[pos].string;
|
|
|
|
if (!starts_with(extra_refname, dirname))
|
|
break;
|
|
|
|
if (!skip || !string_list_has_string(skip, extra_refname))
|
|
return extra_refname;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int rename_ref_available(const char *oldname, const char *newname)
|
|
{
|
|
struct string_list skip = STRING_LIST_INIT_NODUP;
|
|
struct strbuf err = STRBUF_INIT;
|
|
int ret;
|
|
|
|
string_list_insert(&skip, oldname);
|
|
ret = !verify_refname_available(newname, NULL, &skip, &err);
|
|
if (!ret)
|
|
error("%s", err.buf);
|
|
|
|
string_list_clear(&skip, 0);
|
|
strbuf_release(&err);
|
|
return ret;
|
|
}
|