mirror of
https://git.proxmox.com/git/libgit2
synced 2025-05-12 05:16:30 +00:00
743a4b3bdd
git_commit() and git_tag() no longer prettify the message by default. This has to be taken care of by the caller. This has the nice side effect of putting the caller in position to actually choose to strip the comments or not.
465 lines
10 KiB
C
465 lines
10 KiB
C
/*
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* Copyright (C) 2009-2012 the libgit2 contributors
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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 "common.h"
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#include "commit.h"
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#include "tag.h"
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#include "signature.h"
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#include "message.h"
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#include "git2/object.h"
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#include "git2/repository.h"
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#include "git2/signature.h"
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void git_tag__free(git_tag *tag)
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{
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git_signature_free(tag->tagger);
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git__free(tag->message);
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git__free(tag->tag_name);
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git__free(tag);
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}
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const git_oid *git_tag_id(git_tag *c)
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{
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return git_object_id((git_object *)c);
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}
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int git_tag_target(git_object **target, git_tag *t)
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{
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assert(t);
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return git_object_lookup(target, t->object.repo, &t->target, t->type);
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}
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const git_oid *git_tag_target_oid(git_tag *t)
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{
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assert(t);
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return &t->target;
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}
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git_otype git_tag_type(git_tag *t)
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{
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assert(t);
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return t->type;
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}
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const char *git_tag_name(git_tag *t)
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{
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assert(t);
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return t->tag_name;
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}
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const git_signature *git_tag_tagger(git_tag *t)
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{
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return t->tagger;
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}
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const char *git_tag_message(git_tag *t)
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{
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assert(t);
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return t->message;
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}
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static int tag_error(const char *str)
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{
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giterr_set(GITERR_TAG, "Failed to parse tag. %s", str);
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return -1;
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}
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int git_tag__parse_buffer(git_tag *tag, const char *buffer, size_t length)
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{
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static const char *tag_types[] = {
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NULL, "commit\n", "tree\n", "blob\n", "tag\n"
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};
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unsigned int i;
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size_t text_len;
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char *search;
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const char *buffer_end = buffer + length;
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if (git_oid__parse(&tag->target, &buffer, buffer_end, "object ") < 0)
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return tag_error("Object field invalid");
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if (buffer + 5 >= buffer_end)
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return tag_error("Object too short");
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if (memcmp(buffer, "type ", 5) != 0)
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return tag_error("Type field not found");
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buffer += 5;
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tag->type = GIT_OBJ_BAD;
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for (i = 1; i < ARRAY_SIZE(tag_types); ++i) {
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size_t type_length = strlen(tag_types[i]);
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if (buffer + type_length >= buffer_end)
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return tag_error("Object too short");
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if (memcmp(buffer, tag_types[i], type_length) == 0) {
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tag->type = i;
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buffer += type_length;
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break;
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}
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}
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if (tag->type == GIT_OBJ_BAD)
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return tag_error("Invalid object type");
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if (buffer + 4 >= buffer_end)
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return tag_error("Object too short");
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if (memcmp(buffer, "tag ", 4) != 0)
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return tag_error("Tag field not found");
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buffer += 4;
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search = memchr(buffer, '\n', buffer_end - buffer);
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if (search == NULL)
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return tag_error("Object too short");
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text_len = search - buffer;
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tag->tag_name = git__malloc(text_len + 1);
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GITERR_CHECK_ALLOC(tag->tag_name);
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memcpy(tag->tag_name, buffer, text_len);
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tag->tag_name[text_len] = '\0';
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buffer = search + 1;
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tag->tagger = NULL;
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if (*buffer != '\n') {
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tag->tagger = git__malloc(sizeof(git_signature));
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GITERR_CHECK_ALLOC(tag->tagger);
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if (git_signature__parse(tag->tagger, &buffer, buffer_end, "tagger ", '\n') < 0)
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return -1;
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}
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if( *buffer != '\n' )
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return tag_error("No new line before message");
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text_len = buffer_end - ++buffer;
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tag->message = git__malloc(text_len + 1);
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GITERR_CHECK_ALLOC(tag->message);
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memcpy(tag->message, buffer, text_len);
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tag->message[text_len] = '\0';
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return 0;
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}
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static int retrieve_tag_reference(
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git_reference **tag_reference_out,
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git_buf *ref_name_out,
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git_repository *repo,
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const char *tag_name)
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{
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git_reference *tag_ref;
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int error;
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*tag_reference_out = NULL;
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if (git_buf_joinpath(ref_name_out, GIT_REFS_TAGS_DIR, tag_name) < 0)
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return -1;
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error = git_reference_lookup(&tag_ref, repo, ref_name_out->ptr);
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if (error < 0)
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return error; /* Be it not foundo or corrupted */
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*tag_reference_out = tag_ref;
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return 0;
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}
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static int retrieve_tag_reference_oid(
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git_oid *oid,
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git_buf *ref_name_out,
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git_repository *repo,
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const char *tag_name)
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{
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if (git_buf_joinpath(ref_name_out, GIT_REFS_TAGS_DIR, tag_name) < 0)
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return -1;
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return git_reference_name_to_oid(oid, repo, ref_name_out->ptr);
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}
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static int write_tag_annotation(
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git_oid *oid,
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git_repository *repo,
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const char *tag_name,
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const git_object *target,
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const git_signature *tagger,
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const char *message)
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{
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git_buf tag = GIT_BUF_INIT;
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git_odb *odb;
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git_oid__writebuf(&tag, "object ", git_object_id(target));
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git_buf_printf(&tag, "type %s\n", git_object_type2string(git_object_type(target)));
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git_buf_printf(&tag, "tag %s\n", tag_name);
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git_signature__writebuf(&tag, "tagger ", tagger);
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git_buf_putc(&tag, '\n');
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if (git_buf_puts(&tag, message) < 0)
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goto on_error;
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if (git_repository_odb__weakptr(&odb, repo) < 0)
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goto on_error;
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if (git_odb_write(oid, odb, tag.ptr, tag.size, GIT_OBJ_TAG) < 0)
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goto on_error;
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git_buf_free(&tag);
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return 0;
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on_error:
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git_buf_free(&tag);
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giterr_set(GITERR_OBJECT, "Failed to create tag annotation.");
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return -1;
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}
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static int git_tag_create__internal(
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git_oid *oid,
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git_repository *repo,
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const char *tag_name,
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const git_object *target,
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const git_signature *tagger,
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const char *message,
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int allow_ref_overwrite,
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int create_tag_annotation)
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{
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git_reference *new_ref = NULL;
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git_buf ref_name = GIT_BUF_INIT;
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int error;
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assert(repo && tag_name && target);
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assert(!create_tag_annotation || (tagger && message));
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if (git_object_owner(target) != repo) {
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giterr_set(GITERR_INVALID, "The given target does not belong to this repository");
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return -1;
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}
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error = retrieve_tag_reference_oid(oid, &ref_name, repo, tag_name);
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if (error < 0 && error != GIT_ENOTFOUND)
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return -1;
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/** Ensure the tag name doesn't conflict with an already existing
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* reference unless overwriting has explictly been requested **/
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if (error == 0 && !allow_ref_overwrite) {
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git_buf_free(&ref_name);
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giterr_set(GITERR_TAG, "Tag already exists");
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return GIT_EEXISTS;
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}
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if (create_tag_annotation) {
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if (write_tag_annotation(oid, repo, tag_name, target, tagger, message) < 0)
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return -1;
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} else
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git_oid_cpy(oid, git_object_id(target));
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error = git_reference_create_oid(&new_ref, repo, ref_name.ptr, oid, allow_ref_overwrite);
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git_reference_free(new_ref);
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git_buf_free(&ref_name);
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return error;
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}
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int git_tag_create(
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git_oid *oid,
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git_repository *repo,
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const char *tag_name,
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const git_object *target,
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const git_signature *tagger,
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const char *message,
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int allow_ref_overwrite)
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{
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return git_tag_create__internal(oid, repo, tag_name, target, tagger, message, allow_ref_overwrite, 1);
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}
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int git_tag_create_lightweight(
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git_oid *oid,
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git_repository *repo,
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const char *tag_name,
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const git_object *target,
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int allow_ref_overwrite)
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{
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return git_tag_create__internal(oid, repo, tag_name, target, NULL, NULL, allow_ref_overwrite, 0);
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}
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int git_tag_create_frombuffer(git_oid *oid, git_repository *repo, const char *buffer, int allow_ref_overwrite)
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{
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git_tag tag;
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int error;
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git_odb *odb;
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git_odb_stream *stream;
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git_odb_object *target_obj;
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git_reference *new_ref = NULL;
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git_buf ref_name = GIT_BUF_INIT;
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assert(oid && buffer);
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memset(&tag, 0, sizeof(tag));
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if (git_repository_odb__weakptr(&odb, repo) < 0)
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return -1;
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/* validate the buffer */
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if (git_tag__parse_buffer(&tag, buffer, strlen(buffer)) < 0)
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return -1;
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/* validate the target */
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if (git_odb_read(&target_obj, odb, &tag.target) < 0)
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goto on_error;
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if (tag.type != target_obj->raw.type) {
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giterr_set(GITERR_TAG, "The type for the given target is invalid");
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goto on_error;
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}
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error = retrieve_tag_reference_oid(oid, &ref_name, repo, tag.tag_name);
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if (error < 0 && error != GIT_ENOTFOUND)
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goto on_error;
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/* We don't need these objects after this */
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git_signature_free(tag.tagger);
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git__free(tag.tag_name);
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git__free(tag.message);
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git_odb_object_free(target_obj);
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/** Ensure the tag name doesn't conflict with an already existing
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* reference unless overwriting has explictly been requested **/
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if (error == 0 && !allow_ref_overwrite) {
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giterr_set(GITERR_TAG, "Tag already exists");
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return GIT_EEXISTS;
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}
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/* write the buffer */
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if (git_odb_open_wstream(&stream, odb, strlen(buffer), GIT_OBJ_TAG) < 0)
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return -1;
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stream->write(stream, buffer, strlen(buffer));
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error = stream->finalize_write(oid, stream);
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stream->free(stream);
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if (error < 0) {
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git_buf_free(&ref_name);
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return -1;
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}
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error = git_reference_create_oid(&new_ref, repo, ref_name.ptr, oid, allow_ref_overwrite);
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git_reference_free(new_ref);
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git_buf_free(&ref_name);
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return error;
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on_error:
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git_signature_free(tag.tagger);
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git__free(tag.tag_name);
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git__free(tag.message);
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git_odb_object_free(target_obj);
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return -1;
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}
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int git_tag_delete(git_repository *repo, const char *tag_name)
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{
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int error;
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git_reference *tag_ref;
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git_buf ref_name = GIT_BUF_INIT;
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error = retrieve_tag_reference(&tag_ref, &ref_name, repo, tag_name);
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git_buf_free(&ref_name);
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if (error < 0)
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return -1;
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return git_reference_delete(tag_ref);
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}
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int git_tag__parse(git_tag *tag, git_odb_object *obj)
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{
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assert(tag);
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return git_tag__parse_buffer(tag, obj->raw.data, obj->raw.len);
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}
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typedef struct {
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git_vector *taglist;
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const char *pattern;
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} tag_filter_data;
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#define GIT_REFS_TAGS_DIR_LEN strlen(GIT_REFS_TAGS_DIR)
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static int tag_list_cb(const char *tag_name, void *payload)
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{
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tag_filter_data *filter;
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if (git__prefixcmp(tag_name, GIT_REFS_TAGS_DIR) != 0)
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return 0;
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filter = (tag_filter_data *)payload;
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if (!*filter->pattern || p_fnmatch(filter->pattern, tag_name + GIT_REFS_TAGS_DIR_LEN, 0) == 0)
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return git_vector_insert(filter->taglist, git__strdup(tag_name));
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return 0;
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}
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int git_tag_list_match(git_strarray *tag_names, const char *pattern, git_repository *repo)
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{
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int error;
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tag_filter_data filter;
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git_vector taglist;
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assert(tag_names && repo && pattern);
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if (git_vector_init(&taglist, 8, NULL) < 0)
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return -1;
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filter.taglist = &taglist;
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filter.pattern = pattern;
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error = git_reference_foreach(repo, GIT_REF_OID|GIT_REF_PACKED, &tag_list_cb, (void *)&filter);
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if (error < 0) {
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git_vector_free(&taglist);
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return -1;
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}
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tag_names->strings = (char **)taglist.contents;
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tag_names->count = taglist.length;
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return 0;
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}
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int git_tag_list(git_strarray *tag_names, git_repository *repo)
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{
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return git_tag_list_match(tag_names, "", repo);
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}
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int git_tag_peel(git_object **tag_target, git_tag *tag)
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{
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int error;
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git_object *target;
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assert(tag_target && tag);
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if (git_tag_target(&target, tag) < 0)
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return -1;
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if (git_object_type(target) == GIT_OBJ_TAG) {
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error = git_tag_peel(tag_target, (git_tag *)target);
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git_object_free(target);
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return error;
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}
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*tag_target = target;
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return 0;
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}
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