mirror of
https://git.proxmox.com/git/libgit2
synced 2025-05-07 16:22:40 +00:00
1306 lines
28 KiB
C
1306 lines
28 KiB
C
/*
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* Copyright (C) the libgit2 contributors. All rights reserved.
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#include "refs.h"
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#include "hash.h"
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#include "repository.h"
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#include "fileops.h"
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#include "filebuf.h"
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#include "pack.h"
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#include "reflog.h"
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#include "refdb.h"
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#include <git2/tag.h>
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#include <git2/object.h>
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#include <git2/oid.h>
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#include <git2/branch.h>
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#include <git2/refs.h>
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#include <git2/refdb.h>
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#include <git2/sys/refs.h>
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#include <git2/signature.h>
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#include <git2/commit.h>
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GIT__USE_STRMAP
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#define DEFAULT_NESTING_LEVEL 5
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#define MAX_NESTING_LEVEL 10
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enum {
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GIT_PACKREF_HAS_PEEL = 1,
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GIT_PACKREF_WAS_LOOSE = 2
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};
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static git_reference *alloc_ref(const char *name)
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{
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git_reference *ref = NULL;
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size_t namelen = strlen(name), reflen;
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if (!GIT_ADD_SIZET_OVERFLOW(&reflen, sizeof(git_reference), namelen) &&
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!GIT_ADD_SIZET_OVERFLOW(&reflen, reflen, 1) &&
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(ref = git__calloc(1, reflen)) != NULL)
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memcpy(ref->name, name, namelen + 1);
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return ref;
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}
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git_reference *git_reference__alloc_symbolic(
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const char *name, const char *target)
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{
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git_reference *ref;
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assert(name && target);
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ref = alloc_ref(name);
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if (!ref)
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return NULL;
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ref->type = GIT_REF_SYMBOLIC;
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if ((ref->target.symbolic = git__strdup(target)) == NULL) {
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git__free(ref);
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return NULL;
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}
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return ref;
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}
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git_reference *git_reference__alloc(
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const char *name,
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const git_oid *oid,
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const git_oid *peel)
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{
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git_reference *ref;
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assert(name && oid);
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ref = alloc_ref(name);
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if (!ref)
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return NULL;
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ref->type = GIT_REF_OID;
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git_oid_cpy(&ref->target.oid, oid);
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if (peel != NULL)
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git_oid_cpy(&ref->peel, peel);
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return ref;
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}
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git_reference *git_reference__set_name(
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git_reference *ref, const char *name)
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{
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size_t namelen = strlen(name);
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size_t reflen;
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git_reference *rewrite = NULL;
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if (!GIT_ADD_SIZET_OVERFLOW(&reflen, sizeof(git_reference), namelen) &&
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!GIT_ADD_SIZET_OVERFLOW(&reflen, reflen, 1) &&
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(rewrite = git__realloc(ref, reflen)) != NULL)
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memcpy(rewrite->name, name, namelen + 1);
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return rewrite;
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}
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void git_reference_free(git_reference *reference)
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{
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if (reference == NULL)
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return;
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if (reference->type == GIT_REF_SYMBOLIC)
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git__free(reference->target.symbolic);
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if (reference->db)
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GIT_REFCOUNT_DEC(reference->db, git_refdb__free);
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git__free(reference);
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}
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int git_reference_delete(git_reference *ref)
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{
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const git_oid *old_id = NULL;
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const char *old_target = NULL;
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if (ref->type == GIT_REF_OID)
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old_id = &ref->target.oid;
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else
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old_target = ref->target.symbolic;
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return git_refdb_delete(ref->db, ref->name, old_id, old_target);
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}
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int git_reference_remove(git_repository *repo, const char *name)
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{
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git_refdb *db;
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int error;
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if ((error = git_repository_refdb__weakptr(&db, repo)) < 0)
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return error;
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return git_refdb_delete(db, name, NULL, NULL);
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}
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int git_reference_lookup(git_reference **ref_out,
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git_repository *repo, const char *name)
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{
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return git_reference_lookup_resolved(ref_out, repo, name, 0);
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}
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int git_reference_name_to_id(
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git_oid *out, git_repository *repo, const char *name)
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{
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int error;
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git_reference *ref;
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if ((error = git_reference_lookup_resolved(&ref, repo, name, -1)) < 0)
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return error;
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git_oid_cpy(out, git_reference_target(ref));
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git_reference_free(ref);
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return 0;
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}
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static int reference_normalize_for_repo(
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git_refname_t out,
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git_repository *repo,
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const char *name)
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{
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int precompose;
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unsigned int flags = GIT_REF_FORMAT_ALLOW_ONELEVEL;
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if (!git_repository__cvar(&precompose, repo, GIT_CVAR_PRECOMPOSE) &&
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precompose)
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flags |= GIT_REF_FORMAT__PRECOMPOSE_UNICODE;
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return git_reference_normalize_name(out, GIT_REFNAME_MAX, name, flags);
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}
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int git_reference_lookup_resolved(
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git_reference **ref_out,
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git_repository *repo,
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const char *name,
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int max_nesting)
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{
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git_refname_t scan_name;
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git_ref_t scan_type;
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int error = 0, nesting;
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git_reference *ref = NULL;
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git_refdb *refdb;
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assert(ref_out && repo && name);
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*ref_out = NULL;
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if (max_nesting > MAX_NESTING_LEVEL)
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max_nesting = MAX_NESTING_LEVEL;
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else if (max_nesting < 0)
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max_nesting = DEFAULT_NESTING_LEVEL;
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scan_type = GIT_REF_SYMBOLIC;
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if ((error = reference_normalize_for_repo(scan_name, repo, name)) < 0)
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return error;
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if ((error = git_repository_refdb__weakptr(&refdb, repo)) < 0)
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return error;
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for (nesting = max_nesting;
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nesting >= 0 && scan_type == GIT_REF_SYMBOLIC;
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nesting--)
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{
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if (nesting != max_nesting) {
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strncpy(scan_name, ref->target.symbolic, sizeof(scan_name));
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git_reference_free(ref);
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}
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if ((error = git_refdb_lookup(&ref, refdb, scan_name)) < 0)
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return error;
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scan_type = ref->type;
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}
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if (scan_type != GIT_REF_OID && max_nesting != 0) {
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giterr_set(GITERR_REFERENCE,
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"Cannot resolve reference (>%u levels deep)", max_nesting);
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git_reference_free(ref);
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return -1;
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}
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*ref_out = ref;
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return 0;
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}
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int git_reference_dwim(git_reference **out, git_repository *repo, const char *refname)
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{
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int error = 0, i;
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bool fallbackmode = true, foundvalid = false;
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git_reference *ref;
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git_buf refnamebuf = GIT_BUF_INIT, name = GIT_BUF_INIT;
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static const char* formatters[] = {
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"%s",
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GIT_REFS_DIR "%s",
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GIT_REFS_TAGS_DIR "%s",
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GIT_REFS_HEADS_DIR "%s",
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GIT_REFS_REMOTES_DIR "%s",
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GIT_REFS_REMOTES_DIR "%s/" GIT_HEAD_FILE,
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NULL
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};
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if (*refname)
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git_buf_puts(&name, refname);
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else {
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git_buf_puts(&name, GIT_HEAD_FILE);
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fallbackmode = false;
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}
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for (i = 0; formatters[i] && (fallbackmode || i == 0); i++) {
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git_buf_clear(&refnamebuf);
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if ((error = git_buf_printf(&refnamebuf, formatters[i], git_buf_cstr(&name))) < 0)
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goto cleanup;
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if (!git_reference_is_valid_name(git_buf_cstr(&refnamebuf))) {
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error = GIT_EINVALIDSPEC;
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continue;
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}
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foundvalid = true;
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error = git_reference_lookup_resolved(&ref, repo, git_buf_cstr(&refnamebuf), -1);
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if (!error) {
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*out = ref;
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error = 0;
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goto cleanup;
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}
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if (error != GIT_ENOTFOUND)
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goto cleanup;
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}
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cleanup:
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if (error && !foundvalid) {
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/* never found a valid reference name */
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giterr_set(GITERR_REFERENCE,
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"Could not use '%s' as valid reference name", git_buf_cstr(&name));
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}
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git_buf_free(&name);
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git_buf_free(&refnamebuf);
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return error;
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}
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/**
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* Getters
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*/
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git_ref_t git_reference_type(const git_reference *ref)
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{
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assert(ref);
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return ref->type;
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}
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const char *git_reference_name(const git_reference *ref)
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{
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assert(ref);
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return ref->name;
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}
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git_repository *git_reference_owner(const git_reference *ref)
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{
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assert(ref);
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return ref->db->repo;
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}
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const git_oid *git_reference_target(const git_reference *ref)
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{
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assert(ref);
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if (ref->type != GIT_REF_OID)
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return NULL;
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return &ref->target.oid;
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}
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const git_oid *git_reference_target_peel(const git_reference *ref)
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{
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assert(ref);
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if (ref->type != GIT_REF_OID || git_oid_iszero(&ref->peel))
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return NULL;
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return &ref->peel;
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}
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const char *git_reference_symbolic_target(const git_reference *ref)
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{
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assert(ref);
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if (ref->type != GIT_REF_SYMBOLIC)
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return NULL;
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return ref->target.symbolic;
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}
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static int reference__create(
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git_reference **ref_out,
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git_repository *repo,
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const char *name,
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const git_oid *oid,
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const char *symbolic,
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int force,
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const git_signature *signature,
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const char *log_message,
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const git_oid *old_id,
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const char *old_target)
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{
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git_refname_t normalized;
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git_refdb *refdb;
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git_reference *ref = NULL;
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int error = 0;
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assert(repo && name);
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assert(symbolic || signature);
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if (ref_out)
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*ref_out = NULL;
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error = reference_normalize_for_repo(normalized, repo, name);
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if (error < 0)
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return error;
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error = git_repository_refdb__weakptr(&refdb, repo);
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if (error < 0)
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return error;
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if (oid != NULL) {
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git_odb *odb;
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assert(symbolic == NULL);
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/* Sanity check the reference being created - target must exist. */
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if ((error = git_repository_odb__weakptr(&odb, repo)) < 0)
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return error;
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if (!git_odb_exists(odb, oid)) {
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giterr_set(GITERR_REFERENCE,
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"Target OID for the reference doesn't exist on the repository");
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return -1;
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}
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ref = git_reference__alloc(normalized, oid, NULL);
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} else {
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git_refname_t normalized_target;
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if ((error = reference_normalize_for_repo(normalized_target, repo, symbolic)) < 0)
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return error;
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ref = git_reference__alloc_symbolic(normalized, normalized_target);
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}
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GITERR_CHECK_ALLOC(ref);
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if ((error = git_refdb_write(refdb, ref, force, signature, log_message, old_id, old_target)) < 0) {
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git_reference_free(ref);
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return error;
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}
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if (ref_out == NULL)
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git_reference_free(ref);
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else
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*ref_out = ref;
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return 0;
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}
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int configured_ident(git_signature **out, const git_repository *repo)
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{
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if (repo->ident_name && repo->ident_email)
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return git_signature_now(out, repo->ident_name, repo->ident_email);
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/* if not configured let us fall-through to the next method */
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return -1;
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}
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int git_reference__log_signature(git_signature **out, git_repository *repo)
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{
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int error;
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git_signature *who;
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if(((error = configured_ident(&who, repo)) < 0) &&
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((error = git_signature_default(&who, repo)) < 0) &&
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((error = git_signature_now(&who, "unknown", "unknown")) < 0))
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return error;
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*out = who;
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return 0;
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}
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int git_reference_create_matching(
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git_reference **ref_out,
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git_repository *repo,
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const char *name,
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const git_oid *id,
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int force,
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const git_oid *old_id,
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const char *log_message)
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{
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int error;
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git_signature *who = NULL;
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assert(id);
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if ((error = git_reference__log_signature(&who, repo)) < 0)
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return error;
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error = reference__create(
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ref_out, repo, name, id, NULL, force, who, log_message, old_id, NULL);
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git_signature_free(who);
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return error;
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}
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int git_reference_create(
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git_reference **ref_out,
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git_repository *repo,
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const char *name,
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const git_oid *id,
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int force,
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const char *log_message)
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{
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return git_reference_create_matching(ref_out, repo, name, id, force, NULL, log_message);
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}
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int git_reference_symbolic_create_matching(
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git_reference **ref_out,
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git_repository *repo,
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const char *name,
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const char *target,
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int force,
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const char *old_target,
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const char *log_message)
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{
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int error;
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git_signature *who = NULL;
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assert(target);
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if ((error = git_reference__log_signature(&who, repo)) < 0)
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return error;
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error = reference__create(
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ref_out, repo, name, NULL, target, force, who, log_message, NULL, old_target);
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git_signature_free(who);
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return error;
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}
|
|
|
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int git_reference_symbolic_create(
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git_reference **ref_out,
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git_repository *repo,
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const char *name,
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const char *target,
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int force,
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const char *log_message)
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{
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return git_reference_symbolic_create_matching(ref_out, repo, name, target, force, NULL, log_message);
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}
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|
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static int ensure_is_an_updatable_direct_reference(git_reference *ref)
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{
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if (ref->type == GIT_REF_OID)
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return 0;
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|
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giterr_set(GITERR_REFERENCE, "Cannot set OID on symbolic reference");
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return -1;
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}
|
|
|
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int git_reference_set_target(
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|
git_reference **out,
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|
git_reference *ref,
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const git_oid *id,
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|
const char *log_message)
|
|
{
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|
int error;
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git_repository *repo;
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|
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assert(out && ref && id);
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|
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repo = ref->db->repo;
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|
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if ((error = ensure_is_an_updatable_direct_reference(ref)) < 0)
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return error;
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|
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return git_reference_create_matching(out, repo, ref->name, id, 1, &ref->target.oid, log_message);
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}
|
|
|
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static int ensure_is_an_updatable_symbolic_reference(git_reference *ref)
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|
{
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if (ref->type == GIT_REF_SYMBOLIC)
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return 0;
|
|
|
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giterr_set(GITERR_REFERENCE, "Cannot set symbolic target on a direct reference");
|
|
return -1;
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|
}
|
|
|
|
int git_reference_symbolic_set_target(
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|
git_reference **out,
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|
git_reference *ref,
|
|
const char *target,
|
|
const char *log_message)
|
|
{
|
|
int error;
|
|
|
|
assert(out && ref && target);
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|
|
|
if ((error = ensure_is_an_updatable_symbolic_reference(ref)) < 0)
|
|
return error;
|
|
|
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return git_reference_symbolic_create_matching(
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out, ref->db->repo, ref->name, target, 1, ref->target.symbolic, log_message);
|
|
}
|
|
|
|
static int reference__rename(git_reference **out, git_reference *ref, const char *new_name, int force,
|
|
const git_signature *signature, const char *message)
|
|
{
|
|
git_refname_t normalized;
|
|
bool should_head_be_updated = false;
|
|
int error = 0;
|
|
|
|
assert(ref && new_name && signature);
|
|
|
|
if ((error = reference_normalize_for_repo(
|
|
normalized, git_reference_owner(ref), new_name)) < 0)
|
|
return error;
|
|
|
|
|
|
/* Check if we have to update HEAD. */
|
|
if ((error = git_branch_is_head(ref)) < 0)
|
|
return error;
|
|
|
|
should_head_be_updated = (error > 0);
|
|
|
|
if ((error = git_refdb_rename(out, ref->db, ref->name, normalized, force, signature, message)) < 0)
|
|
return error;
|
|
|
|
/* Update HEAD it was pointing to the reference being renamed */
|
|
if (should_head_be_updated &&
|
|
(error = git_repository_set_head(ref->db->repo, normalized)) < 0) {
|
|
giterr_set(GITERR_REFERENCE, "Failed to update HEAD after renaming reference");
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int git_reference_rename(
|
|
git_reference **out,
|
|
git_reference *ref,
|
|
const char *new_name,
|
|
int force,
|
|
const char *log_message)
|
|
{
|
|
git_signature *who;
|
|
int error;
|
|
|
|
if ((error = git_reference__log_signature(&who, ref->db->repo)) < 0)
|
|
return error;
|
|
|
|
error = reference__rename(out, ref, new_name, force, who, log_message);
|
|
git_signature_free(who);
|
|
|
|
return error;
|
|
}
|
|
|
|
int git_reference_resolve(git_reference **ref_out, const git_reference *ref)
|
|
{
|
|
switch (git_reference_type(ref)) {
|
|
case GIT_REF_OID:
|
|
return git_reference_lookup(ref_out, ref->db->repo, ref->name);
|
|
|
|
case GIT_REF_SYMBOLIC:
|
|
return git_reference_lookup_resolved(ref_out, ref->db->repo, ref->target.symbolic, -1);
|
|
|
|
default:
|
|
giterr_set(GITERR_REFERENCE, "Invalid reference");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
int git_reference_foreach(
|
|
git_repository *repo,
|
|
git_reference_foreach_cb callback,
|
|
void *payload)
|
|
{
|
|
git_reference_iterator *iter;
|
|
git_reference *ref;
|
|
int error;
|
|
|
|
if ((error = git_reference_iterator_new(&iter, repo)) < 0)
|
|
return error;
|
|
|
|
while (!(error = git_reference_next(&ref, iter))) {
|
|
if ((error = callback(ref, payload)) != 0) {
|
|
giterr_set_after_callback(error);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (error == GIT_ITEROVER)
|
|
error = 0;
|
|
|
|
git_reference_iterator_free(iter);
|
|
return error;
|
|
}
|
|
|
|
int git_reference_foreach_name(
|
|
git_repository *repo,
|
|
git_reference_foreach_name_cb callback,
|
|
void *payload)
|
|
{
|
|
git_reference_iterator *iter;
|
|
const char *refname;
|
|
int error;
|
|
|
|
if ((error = git_reference_iterator_new(&iter, repo)) < 0)
|
|
return error;
|
|
|
|
while (!(error = git_reference_next_name(&refname, iter))) {
|
|
if ((error = callback(refname, payload)) != 0) {
|
|
giterr_set_after_callback(error);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (error == GIT_ITEROVER)
|
|
error = 0;
|
|
|
|
git_reference_iterator_free(iter);
|
|
return error;
|
|
}
|
|
|
|
int git_reference_foreach_glob(
|
|
git_repository *repo,
|
|
const char *glob,
|
|
git_reference_foreach_name_cb callback,
|
|
void *payload)
|
|
{
|
|
git_reference_iterator *iter;
|
|
const char *refname;
|
|
int error;
|
|
|
|
if ((error = git_reference_iterator_glob_new(&iter, repo, glob)) < 0)
|
|
return error;
|
|
|
|
while (!(error = git_reference_next_name(&refname, iter))) {
|
|
if ((error = callback(refname, payload)) != 0) {
|
|
giterr_set_after_callback(error);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (error == GIT_ITEROVER)
|
|
error = 0;
|
|
|
|
git_reference_iterator_free(iter);
|
|
return error;
|
|
}
|
|
|
|
int git_reference_iterator_new(git_reference_iterator **out, git_repository *repo)
|
|
{
|
|
git_refdb *refdb;
|
|
|
|
if (git_repository_refdb__weakptr(&refdb, repo) < 0)
|
|
return -1;
|
|
|
|
return git_refdb_iterator(out, refdb, NULL);
|
|
}
|
|
|
|
int git_reference_iterator_glob_new(
|
|
git_reference_iterator **out, git_repository *repo, const char *glob)
|
|
{
|
|
git_refdb *refdb;
|
|
|
|
if (git_repository_refdb__weakptr(&refdb, repo) < 0)
|
|
return -1;
|
|
|
|
return git_refdb_iterator(out, refdb, glob);
|
|
}
|
|
|
|
int git_reference_next(git_reference **out, git_reference_iterator *iter)
|
|
{
|
|
return git_refdb_iterator_next(out, iter);
|
|
}
|
|
|
|
int git_reference_next_name(const char **out, git_reference_iterator *iter)
|
|
{
|
|
return git_refdb_iterator_next_name(out, iter);
|
|
}
|
|
|
|
void git_reference_iterator_free(git_reference_iterator *iter)
|
|
{
|
|
if (iter == NULL)
|
|
return;
|
|
|
|
git_refdb_iterator_free(iter);
|
|
}
|
|
|
|
static int cb__reflist_add(const char *ref, void *data)
|
|
{
|
|
char *name = git__strdup(ref);
|
|
GITERR_CHECK_ALLOC(name);
|
|
return git_vector_insert((git_vector *)data, name);
|
|
}
|
|
|
|
int git_reference_list(
|
|
git_strarray *array,
|
|
git_repository *repo)
|
|
{
|
|
git_vector ref_list;
|
|
|
|
assert(array && repo);
|
|
|
|
array->strings = NULL;
|
|
array->count = 0;
|
|
|
|
if (git_vector_init(&ref_list, 8, NULL) < 0)
|
|
return -1;
|
|
|
|
if (git_reference_foreach_name(
|
|
repo, &cb__reflist_add, (void *)&ref_list) < 0) {
|
|
git_vector_free(&ref_list);
|
|
return -1;
|
|
}
|
|
|
|
array->strings = (char **)git_vector_detach(&array->count, NULL, &ref_list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int is_valid_ref_char(char ch)
|
|
{
|
|
if ((unsigned) ch <= ' ')
|
|
return 0;
|
|
|
|
switch (ch) {
|
|
case '~':
|
|
case '^':
|
|
case ':':
|
|
case '\\':
|
|
case '?':
|
|
case '[':
|
|
case '*':
|
|
return 0;
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static int ensure_segment_validity(const char *name)
|
|
{
|
|
const char *current = name;
|
|
char prev = '\0';
|
|
const int lock_len = (int)strlen(GIT_FILELOCK_EXTENSION);
|
|
int segment_len;
|
|
|
|
if (*current == '.')
|
|
return -1; /* Refname starts with "." */
|
|
|
|
for (current = name; ; current++) {
|
|
if (*current == '\0' || *current == '/')
|
|
break;
|
|
|
|
if (!is_valid_ref_char(*current))
|
|
return -1; /* Illegal character in refname */
|
|
|
|
if (prev == '.' && *current == '.')
|
|
return -1; /* Refname contains ".." */
|
|
|
|
if (prev == '@' && *current == '{')
|
|
return -1; /* Refname contains "@{" */
|
|
|
|
prev = *current;
|
|
}
|
|
|
|
segment_len = (int)(current - name);
|
|
|
|
/* A refname component can not end with ".lock" */
|
|
if (segment_len >= lock_len &&
|
|
!memcmp(current - lock_len, GIT_FILELOCK_EXTENSION, lock_len))
|
|
return -1;
|
|
|
|
return segment_len;
|
|
}
|
|
|
|
static bool is_all_caps_and_underscore(const char *name, size_t len)
|
|
{
|
|
size_t i;
|
|
char c;
|
|
|
|
assert(name && len > 0);
|
|
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
c = name[i];
|
|
if ((c < 'A' || c > 'Z') && c != '_')
|
|
return false;
|
|
}
|
|
|
|
if (*name == '_' || name[len - 1] == '_')
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Inspired from https://github.com/git/git/blob/f06d47e7e0d9db709ee204ed13a8a7486149f494/refs.c#L36-100 */
|
|
int git_reference__normalize_name(
|
|
git_buf *buf,
|
|
const char *name,
|
|
unsigned int flags)
|
|
{
|
|
char *current;
|
|
int segment_len, segments_count = 0, error = GIT_EINVALIDSPEC;
|
|
unsigned int process_flags;
|
|
bool normalize = (buf != NULL);
|
|
|
|
#ifdef GIT_USE_ICONV
|
|
git_path_iconv_t ic = GIT_PATH_ICONV_INIT;
|
|
#endif
|
|
|
|
assert(name);
|
|
|
|
process_flags = flags;
|
|
current = (char *)name;
|
|
|
|
if (*current == '/')
|
|
goto cleanup;
|
|
|
|
if (normalize)
|
|
git_buf_clear(buf);
|
|
|
|
#ifdef GIT_USE_ICONV
|
|
if ((flags & GIT_REF_FORMAT__PRECOMPOSE_UNICODE) != 0) {
|
|
size_t namelen = strlen(current);
|
|
if ((error = git_path_iconv_init_precompose(&ic)) < 0 ||
|
|
(error = git_path_iconv(&ic, ¤t, &namelen)) < 0)
|
|
goto cleanup;
|
|
error = GIT_EINVALIDSPEC;
|
|
}
|
|
#endif
|
|
|
|
while (true) {
|
|
segment_len = ensure_segment_validity(current);
|
|
if (segment_len < 0) {
|
|
if ((process_flags & GIT_REF_FORMAT_REFSPEC_PATTERN) &&
|
|
current[0] == '*' &&
|
|
(current[1] == '\0' || current[1] == '/')) {
|
|
/* Accept one wildcard as a full refname component. */
|
|
process_flags &= ~GIT_REF_FORMAT_REFSPEC_PATTERN;
|
|
segment_len = 1;
|
|
} else
|
|
goto cleanup;
|
|
}
|
|
|
|
if (segment_len > 0) {
|
|
if (normalize) {
|
|
size_t cur_len = git_buf_len(buf);
|
|
|
|
git_buf_joinpath(buf, git_buf_cstr(buf), current);
|
|
git_buf_truncate(buf,
|
|
cur_len + segment_len + (segments_count ? 1 : 0));
|
|
|
|
if (git_buf_oom(buf)) {
|
|
error = -1;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
segments_count++;
|
|
}
|
|
|
|
/* No empty segment is allowed when not normalizing */
|
|
if (segment_len == 0 && !normalize)
|
|
goto cleanup;
|
|
|
|
if (current[segment_len] == '\0')
|
|
break;
|
|
|
|
current += segment_len + 1;
|
|
}
|
|
|
|
/* A refname can not be empty */
|
|
if (segment_len == 0 && segments_count == 0)
|
|
goto cleanup;
|
|
|
|
/* A refname can not end with "." */
|
|
if (current[segment_len - 1] == '.')
|
|
goto cleanup;
|
|
|
|
/* A refname can not end with "/" */
|
|
if (current[segment_len - 1] == '/')
|
|
goto cleanup;
|
|
|
|
if ((segments_count == 1 ) && !(flags & GIT_REF_FORMAT_ALLOW_ONELEVEL))
|
|
goto cleanup;
|
|
|
|
if ((segments_count == 1 ) &&
|
|
!(flags & GIT_REF_FORMAT_REFSPEC_SHORTHAND) &&
|
|
!(is_all_caps_and_underscore(name, (size_t)segment_len) ||
|
|
((flags & GIT_REF_FORMAT_REFSPEC_PATTERN) && !strcmp("*", name))))
|
|
goto cleanup;
|
|
|
|
if ((segments_count > 1)
|
|
&& (is_all_caps_and_underscore(name, strchr(name, '/') - name)))
|
|
goto cleanup;
|
|
|
|
error = 0;
|
|
|
|
cleanup:
|
|
if (error == GIT_EINVALIDSPEC)
|
|
giterr_set(
|
|
GITERR_REFERENCE,
|
|
"The given reference name '%s' is not valid", name);
|
|
|
|
if (error && normalize)
|
|
git_buf_free(buf);
|
|
|
|
#ifdef GIT_USE_ICONV
|
|
git_path_iconv_clear(&ic);
|
|
#endif
|
|
|
|
return error;
|
|
}
|
|
|
|
int git_reference_normalize_name(
|
|
char *buffer_out,
|
|
size_t buffer_size,
|
|
const char *name,
|
|
unsigned int flags)
|
|
{
|
|
git_buf buf = GIT_BUF_INIT;
|
|
int error;
|
|
|
|
if ((error = git_reference__normalize_name(&buf, name, flags)) < 0)
|
|
goto cleanup;
|
|
|
|
if (git_buf_len(&buf) > buffer_size - 1) {
|
|
giterr_set(
|
|
GITERR_REFERENCE,
|
|
"The provided buffer is too short to hold the normalization of '%s'", name);
|
|
error = GIT_EBUFS;
|
|
goto cleanup;
|
|
}
|
|
|
|
git_buf_copy_cstr(buffer_out, buffer_size, &buf);
|
|
|
|
error = 0;
|
|
|
|
cleanup:
|
|
git_buf_free(&buf);
|
|
return error;
|
|
}
|
|
|
|
#define GIT_REF_TYPEMASK (GIT_REF_OID | GIT_REF_SYMBOLIC)
|
|
|
|
int git_reference_cmp(
|
|
const git_reference *ref1,
|
|
const git_reference *ref2)
|
|
{
|
|
git_ref_t type1, type2;
|
|
assert(ref1 && ref2);
|
|
|
|
type1 = git_reference_type(ref1);
|
|
type2 = git_reference_type(ref2);
|
|
|
|
/* let's put symbolic refs before OIDs */
|
|
if (type1 != type2)
|
|
return (type1 == GIT_REF_SYMBOLIC) ? -1 : 1;
|
|
|
|
if (type1 == GIT_REF_SYMBOLIC)
|
|
return strcmp(ref1->target.symbolic, ref2->target.symbolic);
|
|
|
|
return git_oid__cmp(&ref1->target.oid, &ref2->target.oid);
|
|
}
|
|
|
|
/**
|
|
* Get the end of a chain of references. If the final one is not
|
|
* found, we return the reference just before that.
|
|
*/
|
|
static int get_terminal(git_reference **out, git_repository *repo, const char *ref_name, int nesting)
|
|
{
|
|
git_reference *ref;
|
|
int error = 0;
|
|
|
|
if (nesting > MAX_NESTING_LEVEL) {
|
|
giterr_set(GITERR_REFERENCE, "Reference chain too deep (%d)", nesting);
|
|
return GIT_ENOTFOUND;
|
|
}
|
|
|
|
/* set to NULL to let the caller know that they're at the end of the chain */
|
|
if ((error = git_reference_lookup(&ref, repo, ref_name)) < 0) {
|
|
*out = NULL;
|
|
return error;
|
|
}
|
|
|
|
if (git_reference_type(ref) == GIT_REF_OID) {
|
|
*out = ref;
|
|
error = 0;
|
|
} else {
|
|
error = get_terminal(out, repo, git_reference_symbolic_target(ref), nesting + 1);
|
|
if (error == GIT_ENOTFOUND && !*out)
|
|
*out = ref;
|
|
else
|
|
git_reference_free(ref);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Starting with the reference given by `ref_name`, follows symbolic
|
|
* references until a direct reference is found and updated the OID
|
|
* on that direct reference to `oid`.
|
|
*/
|
|
int git_reference__update_terminal(
|
|
git_repository *repo,
|
|
const char *ref_name,
|
|
const git_oid *oid,
|
|
const git_signature *sig,
|
|
const char *log_message)
|
|
{
|
|
git_reference *ref = NULL, *ref2 = NULL;
|
|
git_signature *who = NULL;
|
|
const git_signature *to_use;
|
|
int error = 0;
|
|
|
|
if (!sig && (error = git_reference__log_signature(&who, repo)) < 0)
|
|
return error;
|
|
|
|
to_use = sig ? sig : who;
|
|
error = get_terminal(&ref, repo, ref_name, 0);
|
|
|
|
/* found a dangling symref */
|
|
if (error == GIT_ENOTFOUND && ref) {
|
|
assert(git_reference_type(ref) == GIT_REF_SYMBOLIC);
|
|
giterr_clear();
|
|
error = reference__create(&ref2, repo, ref->target.symbolic, oid, NULL, 0, to_use,
|
|
log_message, NULL, NULL);
|
|
} else if (error == GIT_ENOTFOUND) {
|
|
giterr_clear();
|
|
error = reference__create(&ref2, repo, ref_name, oid, NULL, 0, to_use,
|
|
log_message, NULL, NULL);
|
|
} else if (error == 0) {
|
|
assert(git_reference_type(ref) == GIT_REF_OID);
|
|
error = reference__create(&ref2, repo, ref->name, oid, NULL, 1, to_use,
|
|
log_message, &ref->target.oid, NULL);
|
|
}
|
|
|
|
git_reference_free(ref2);
|
|
git_reference_free(ref);
|
|
git_signature_free(who);
|
|
return error;
|
|
}
|
|
|
|
int git_reference__update_for_commit(
|
|
git_repository *repo,
|
|
git_reference *ref,
|
|
const char *ref_name,
|
|
const git_oid *id,
|
|
const char *operation)
|
|
{
|
|
git_reference *ref_new = NULL;
|
|
git_commit *commit = NULL;
|
|
git_buf reflog_msg = GIT_BUF_INIT;
|
|
const git_signature *who;
|
|
int error;
|
|
|
|
if ((error = git_commit_lookup(&commit, repo, id)) < 0 ||
|
|
(error = git_buf_printf(&reflog_msg, "%s%s: %s",
|
|
operation ? operation : "commit",
|
|
git_commit_parentcount(commit) == 0 ? " (initial)" : "",
|
|
git_commit_summary(commit))) < 0)
|
|
goto done;
|
|
|
|
who = git_commit_committer(commit);
|
|
|
|
if (ref) {
|
|
if ((error = ensure_is_an_updatable_direct_reference(ref)) < 0)
|
|
return error;
|
|
|
|
error = reference__create(&ref_new, repo, ref->name, id, NULL, 1, who,
|
|
git_buf_cstr(&reflog_msg), &ref->target.oid, NULL);
|
|
}
|
|
else
|
|
error = git_reference__update_terminal(
|
|
repo, ref_name, id, who, git_buf_cstr(&reflog_msg));
|
|
|
|
done:
|
|
git_reference_free(ref_new);
|
|
git_buf_free(&reflog_msg);
|
|
git_commit_free(commit);
|
|
return error;
|
|
}
|
|
|
|
int git_reference_has_log(git_repository *repo, const char *refname)
|
|
{
|
|
int error;
|
|
git_refdb *refdb;
|
|
|
|
assert(repo && refname);
|
|
|
|
if ((error = git_repository_refdb__weakptr(&refdb, repo)) < 0)
|
|
return error;
|
|
|
|
return git_refdb_has_log(refdb, refname);
|
|
}
|
|
|
|
int git_reference_ensure_log(git_repository *repo, const char *refname)
|
|
{
|
|
int error;
|
|
git_refdb *refdb;
|
|
|
|
assert(repo && refname);
|
|
|
|
if ((error = git_repository_refdb__weakptr(&refdb, repo)) < 0)
|
|
return error;
|
|
|
|
return git_refdb_ensure_log(refdb, refname);
|
|
}
|
|
|
|
int git_reference__is_branch(const char *ref_name)
|
|
{
|
|
return git__prefixcmp(ref_name, GIT_REFS_HEADS_DIR) == 0;
|
|
}
|
|
|
|
int git_reference_is_branch(const git_reference *ref)
|
|
{
|
|
assert(ref);
|
|
return git_reference__is_branch(ref->name);
|
|
}
|
|
|
|
int git_reference__is_remote(const char *ref_name)
|
|
{
|
|
return git__prefixcmp(ref_name, GIT_REFS_REMOTES_DIR) == 0;
|
|
}
|
|
|
|
int git_reference_is_remote(const git_reference *ref)
|
|
{
|
|
assert(ref);
|
|
return git_reference__is_remote(ref->name);
|
|
}
|
|
|
|
int git_reference__is_tag(const char *ref_name)
|
|
{
|
|
return git__prefixcmp(ref_name, GIT_REFS_TAGS_DIR) == 0;
|
|
}
|
|
|
|
int git_reference_is_tag(const git_reference *ref)
|
|
{
|
|
assert(ref);
|
|
return git_reference__is_tag(ref->name);
|
|
}
|
|
|
|
int git_reference__is_note(const char *ref_name)
|
|
{
|
|
return git__prefixcmp(ref_name, GIT_REFS_NOTES_DIR) == 0;
|
|
}
|
|
|
|
int git_reference_is_note(const git_reference *ref)
|
|
{
|
|
assert(ref);
|
|
return git_reference__is_note(ref->name);
|
|
}
|
|
|
|
static int peel_error(int error, git_reference *ref, const char* msg)
|
|
{
|
|
giterr_set(
|
|
GITERR_INVALID,
|
|
"The reference '%s' cannot be peeled - %s", git_reference_name(ref), msg);
|
|
return error;
|
|
}
|
|
|
|
int git_reference_peel(
|
|
git_object **peeled,
|
|
git_reference *ref,
|
|
git_otype target_type)
|
|
{
|
|
git_reference *resolved = NULL;
|
|
git_object *target = NULL;
|
|
int error;
|
|
|
|
assert(ref);
|
|
|
|
if (ref->type == GIT_REF_OID) {
|
|
resolved = ref;
|
|
} else {
|
|
if ((error = git_reference_resolve(&resolved, ref)) < 0)
|
|
return peel_error(error, ref, "Cannot resolve reference");
|
|
}
|
|
|
|
if (!git_oid_iszero(&resolved->peel)) {
|
|
error = git_object_lookup(&target,
|
|
git_reference_owner(ref), &resolved->peel, GIT_OBJ_ANY);
|
|
} else {
|
|
error = git_object_lookup(&target,
|
|
git_reference_owner(ref), &resolved->target.oid, GIT_OBJ_ANY);
|
|
}
|
|
|
|
if (error < 0) {
|
|
peel_error(error, ref, "Cannot retrieve reference target");
|
|
goto cleanup;
|
|
}
|
|
|
|
if (target_type == GIT_OBJ_ANY && git_object_type(target) != GIT_OBJ_TAG)
|
|
error = git_object_dup(peeled, target);
|
|
else
|
|
error = git_object_peel(peeled, target, target_type);
|
|
|
|
cleanup:
|
|
git_object_free(target);
|
|
|
|
if (resolved != ref)
|
|
git_reference_free(resolved);
|
|
|
|
return error;
|
|
}
|
|
|
|
int git_reference__is_valid_name(const char *refname, unsigned int flags)
|
|
{
|
|
if (git_reference__normalize_name(NULL, refname, flags) < 0) {
|
|
giterr_clear();
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int git_reference_is_valid_name(const char *refname)
|
|
{
|
|
return git_reference__is_valid_name(refname, GIT_REF_FORMAT_ALLOW_ONELEVEL);
|
|
}
|
|
|
|
const char *git_reference__shorthand(const char *name)
|
|
{
|
|
if (!git__prefixcmp(name, GIT_REFS_HEADS_DIR))
|
|
return name + strlen(GIT_REFS_HEADS_DIR);
|
|
else if (!git__prefixcmp(name, GIT_REFS_TAGS_DIR))
|
|
return name + strlen(GIT_REFS_TAGS_DIR);
|
|
else if (!git__prefixcmp(name, GIT_REFS_REMOTES_DIR))
|
|
return name + strlen(GIT_REFS_REMOTES_DIR);
|
|
else if (!git__prefixcmp(name, GIT_REFS_DIR))
|
|
return name + strlen(GIT_REFS_DIR);
|
|
|
|
/* No shorthands are avaiable, so just return the name */
|
|
return name;
|
|
}
|
|
|
|
const char *git_reference_shorthand(const git_reference *ref)
|
|
{
|
|
return git_reference__shorthand(ref->name);
|
|
}
|