| /* |
| * Copyright (C) 2009-2011 the libgit2 contributors |
| * |
| * This file is part of libgit2, distributed under the GNU GPL v2 with |
| * a Linking Exception. For full terms see the included COPYING file. |
| */ |
| |
| #include "refs.h" |
| #include "hash.h" |
| #include "repository.h" |
| #include "fileops.h" |
| #include "pack.h" |
| #include "reflog.h" |
| |
| #include <git2/tag.h> |
| #include <git2/object.h> |
| |
| #define MAX_NESTING_LEVEL 5 |
| |
| enum { |
| GIT_PACKREF_HAS_PEEL = 1, |
| GIT_PACKREF_WAS_LOOSE = 2 |
| }; |
| |
| struct packref { |
| git_oid oid; |
| git_oid peel; |
| char flags; |
| char name[GIT_FLEX_ARRAY]; |
| }; |
| |
| static const int default_table_size = 32; |
| |
| static int reference_read( |
| git_fbuffer *file_content, |
| time_t *mtime, |
| const char *repo_path, |
| const char *ref_name, |
| int *updated); |
| |
| /* loose refs */ |
| static int loose_parse_symbolic(git_reference *ref, git_fbuffer *file_content); |
| static int loose_parse_oid(git_oid *ref, git_fbuffer *file_content); |
| static int loose_lookup(git_reference *ref); |
| static int loose_lookup_to_packfile(struct packref **ref_out, |
| git_repository *repo, const char *name); |
| static int loose_write(git_reference *ref); |
| |
| /* packed refs */ |
| static int packed_parse_peel(struct packref *tag_ref, |
| const char **buffer_out, const char *buffer_end); |
| static int packed_parse_oid(struct packref **ref_out, |
| const char **buffer_out, const char *buffer_end); |
| static int packed_load(git_repository *repo); |
| static int packed_loadloose(git_repository *repository); |
| static int packed_write_ref(struct packref *ref, git_filebuf *file); |
| static int packed_find_peel(git_repository *repo, struct packref *ref); |
| static int packed_remove_loose(git_repository *repo, git_vector *packing_list); |
| static int packed_sort(const void *a, const void *b); |
| static int packed_lookup(git_reference *ref); |
| static int packed_write(git_repository *repo); |
| |
| /* internal helpers */ |
| static int reference_available(git_repository *repo, |
| const char *ref, const char *old_ref); |
| static int reference_delete(git_reference *ref); |
| static int reference_lookup(git_reference *ref); |
| |
| /* name normalization */ |
| static int normalize_name(char *buffer_out, size_t out_size, |
| const char *name, int is_oid_ref); |
| |
| |
| void git_reference_free(git_reference *reference) |
| { |
| if (reference == NULL) |
| return; |
| |
| git__free(reference->name); |
| reference->name = NULL; |
| |
| if (reference->flags & GIT_REF_SYMBOLIC) { |
| git__free(reference->target.symbolic); |
| reference->target.symbolic = NULL; |
| } |
| |
| git__free(reference); |
| } |
| |
| static int reference_alloc( |
| git_reference **ref_out, |
| git_repository *repo, |
| const char *name) |
| { |
| git_reference *reference = NULL; |
| |
| assert(ref_out && repo && name); |
| |
| reference = git__malloc(sizeof(git_reference)); |
| if (reference == NULL) |
| return GIT_ENOMEM; |
| |
| memset(reference, 0x0, sizeof(git_reference)); |
| reference->owner = repo; |
| |
| reference->name = git__strdup(name); |
| if (reference->name == NULL) { |
| free(reference); |
| return GIT_ENOMEM; |
| } |
| |
| *ref_out = reference; |
| return GIT_SUCCESS; |
| } |
| |
| static int reference_read(git_fbuffer *file_content, time_t *mtime, const char *repo_path, const char *ref_name, int *updated) |
| { |
| git_buf path = GIT_BUF_INIT; |
| int error = GIT_SUCCESS; |
| |
| assert(file_content && repo_path && ref_name); |
| |
| /* Determine the full path of the file */ |
| if ((error = git_buf_joinpath(&path, repo_path, ref_name)) == GIT_SUCCESS) |
| error = git_futils_readbuffer_updated(file_content, path.ptr, mtime, updated); |
| |
| git_buf_free(&path); |
| |
| return error; |
| } |
| |
| static int loose_parse_symbolic(git_reference *ref, git_fbuffer *file_content) |
| { |
| const unsigned int header_len = strlen(GIT_SYMREF); |
| const char *refname_start; |
| char *eol; |
| |
| refname_start = (const char *)file_content->data; |
| |
| if (file_content->len < (header_len + 1)) |
| return git__throw(GIT_EOBJCORRUPTED, |
| "Failed to parse loose reference. Object too short"); |
| |
| /* |
| * Assume we have already checked for the header |
| * before calling this function |
| */ |
| |
| refname_start += header_len; |
| |
| ref->target.symbolic = git__strdup(refname_start); |
| if (ref->target.symbolic == NULL) |
| return GIT_ENOMEM; |
| |
| /* remove newline at the end of file */ |
| eol = strchr(ref->target.symbolic, '\n'); |
| if (eol == NULL) |
| return git__throw(GIT_EOBJCORRUPTED, |
| "Failed to parse loose reference. Missing EOL"); |
| |
| *eol = '\0'; |
| if (eol[-1] == '\r') |
| eol[-1] = '\0'; |
| |
| return GIT_SUCCESS; |
| } |
| |
| static int loose_parse_oid(git_oid *oid, git_fbuffer *file_content) |
| { |
| int error; |
| char *buffer; |
| |
| buffer = (char *)file_content->data; |
| |
| /* File format: 40 chars (OID) + newline */ |
| if (file_content->len < GIT_OID_HEXSZ + 1) |
| return git__throw(GIT_EOBJCORRUPTED, |
| "Failed to parse loose reference. Reference too short"); |
| |
| if ((error = git_oid_fromstr(oid, buffer)) < GIT_SUCCESS) |
| return git__rethrow(GIT_EOBJCORRUPTED, "Failed to parse loose reference."); |
| |
| buffer = buffer + GIT_OID_HEXSZ; |
| if (*buffer == '\r') |
| buffer++; |
| |
| if (*buffer != '\n') |
| return git__throw(GIT_EOBJCORRUPTED, |
| "Failed to parse loose reference. Missing EOL"); |
| |
| return GIT_SUCCESS; |
| } |
| |
| static git_rtype loose_guess_rtype(const git_buf *full_path) |
| { |
| git_fbuffer ref_file = GIT_FBUFFER_INIT; |
| git_rtype type; |
| |
| type = GIT_REF_INVALID; |
| |
| if (git_futils_readbuffer(&ref_file, full_path->ptr) == GIT_SUCCESS) { |
| if (git__prefixcmp((const char *)(ref_file.data), GIT_SYMREF) == 0) |
| type = GIT_REF_SYMBOLIC; |
| else |
| type = GIT_REF_OID; |
| } |
| |
| git_futils_freebuffer(&ref_file); |
| return type; |
| } |
| |
| static int loose_lookup(git_reference *ref) |
| { |
| int error = GIT_SUCCESS, updated; |
| git_fbuffer ref_file = GIT_FBUFFER_INIT; |
| |
| if (reference_read(&ref_file, &ref->mtime, |
| ref->owner->path_repository, ref->name, &updated) < GIT_SUCCESS) |
| return git__throw(GIT_ENOTFOUND, "Failed to lookup loose reference"); |
| |
| if (!updated) |
| return GIT_SUCCESS; |
| |
| if (ref->flags & GIT_REF_SYMBOLIC) { |
| free(ref->target.symbolic); |
| ref->target.symbolic = NULL; |
| } |
| |
| ref->flags = 0; |
| |
| if (git__prefixcmp((const char *)(ref_file.data), GIT_SYMREF) == 0) { |
| ref->flags |= GIT_REF_SYMBOLIC; |
| error = loose_parse_symbolic(ref, &ref_file); |
| } else { |
| ref->flags |= GIT_REF_OID; |
| error = loose_parse_oid(&ref->target.oid, &ref_file); |
| } |
| |
| git_futils_freebuffer(&ref_file); |
| |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to lookup loose reference"); |
| |
| return GIT_SUCCESS; |
| } |
| |
| static int loose_lookup_to_packfile( |
| struct packref **ref_out, |
| git_repository *repo, |
| const char *name) |
| { |
| int error = GIT_SUCCESS; |
| git_fbuffer ref_file = GIT_FBUFFER_INIT; |
| struct packref *ref = NULL; |
| size_t name_len; |
| |
| *ref_out = NULL; |
| |
| error = reference_read(&ref_file, NULL, repo->path_repository, name, NULL); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| name_len = strlen(name); |
| ref = git__malloc(sizeof(struct packref) + name_len + 1); |
| |
| memcpy(ref->name, name, name_len); |
| ref->name[name_len] = 0; |
| |
| error = loose_parse_oid(&ref->oid, &ref_file); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| ref->flags = GIT_PACKREF_WAS_LOOSE; |
| |
| *ref_out = ref; |
| git_futils_freebuffer(&ref_file); |
| return GIT_SUCCESS; |
| |
| cleanup: |
| git_futils_freebuffer(&ref_file); |
| free(ref); |
| return git__rethrow(error, "Failed to lookup loose reference"); |
| } |
| |
| static int loose_write(git_reference *ref) |
| { |
| git_filebuf file = GIT_FILEBUF_INIT; |
| git_buf ref_path = GIT_BUF_INIT; |
| int error; |
| struct stat st; |
| |
| error = git_buf_joinpath(&ref_path, ref->owner->path_repository, ref->name); |
| if (error < GIT_SUCCESS) |
| goto unlock; |
| |
| error = git_filebuf_open(&file, ref_path.ptr, GIT_FILEBUF_FORCE); |
| if (error < GIT_SUCCESS) |
| goto unlock; |
| |
| if (ref->flags & GIT_REF_OID) { |
| char oid[GIT_OID_HEXSZ + 1]; |
| |
| git_oid_fmt(oid, &ref->target.oid); |
| oid[GIT_OID_HEXSZ] = '\0'; |
| |
| error = git_filebuf_printf(&file, "%s\n", oid); |
| if (error < GIT_SUCCESS) |
| goto unlock; |
| |
| } else if (ref->flags & GIT_REF_SYMBOLIC) { /* GIT_REF_SYMBOLIC */ |
| error = git_filebuf_printf(&file, GIT_SYMREF "%s\n", ref->target.symbolic); |
| } else { |
| error = git__throw(GIT_EOBJCORRUPTED, |
| "Failed to write reference. Invalid reference type"); |
| goto unlock; |
| } |
| |
| if (p_stat(ref_path.ptr, &st) == GIT_SUCCESS) |
| ref->mtime = st.st_mtime; |
| |
| git_buf_free(&ref_path); |
| |
| return git_filebuf_commit(&file, GIT_REFS_FILE_MODE); |
| |
| unlock: |
| git_buf_free(&ref_path); |
| git_filebuf_cleanup(&file); |
| return git__rethrow(error, "Failed to write loose reference"); |
| } |
| |
| static int packed_parse_peel( |
| struct packref *tag_ref, |
| const char **buffer_out, |
| const char *buffer_end) |
| { |
| const char *buffer = *buffer_out + 1; |
| |
| assert(buffer[-1] == '^'); |
| |
| /* Ensure it's not the first entry of the file */ |
| if (tag_ref == NULL) |
| return git__throw(GIT_EPACKEDREFSCORRUPTED, |
| "Failed to parse packed reference. " |
| "Reference is the first entry of the file"); |
| |
| /* Ensure reference is a tag */ |
| if (git__prefixcmp(tag_ref->name, GIT_REFS_TAGS_DIR) != 0) |
| return git__throw(GIT_EPACKEDREFSCORRUPTED, |
| "Failed to parse packed reference. Reference is not a tag"); |
| |
| if (buffer + GIT_OID_HEXSZ >= buffer_end) |
| return git__throw(GIT_EPACKEDREFSCORRUPTED, |
| "Failed to parse packed reference. Buffer too small"); |
| |
| /* Is this a valid object id? */ |
| if (git_oid_fromstr(&tag_ref->peel, buffer) < GIT_SUCCESS) |
| return git__throw(GIT_EPACKEDREFSCORRUPTED, |
| "Failed to parse packed reference. Not a valid object ID"); |
| |
| buffer = buffer + GIT_OID_HEXSZ; |
| if (*buffer == '\r') |
| buffer++; |
| |
| if (*buffer != '\n') |
| return git__throw(GIT_EPACKEDREFSCORRUPTED, |
| "Failed to parse packed reference. Buffer not terminated correctly"); |
| |
| *buffer_out = buffer + 1; |
| return GIT_SUCCESS; |
| } |
| |
| static int packed_parse_oid( |
| struct packref **ref_out, |
| const char **buffer_out, |
| const char *buffer_end) |
| { |
| struct packref *ref = NULL; |
| |
| const char *buffer = *buffer_out; |
| const char *refname_begin, *refname_end; |
| |
| int error = GIT_SUCCESS; |
| size_t refname_len; |
| git_oid id; |
| |
| refname_begin = (buffer + GIT_OID_HEXSZ + 1); |
| if (refname_begin >= buffer_end || |
| refname_begin[-1] != ' ') { |
| error = GIT_EPACKEDREFSCORRUPTED; |
| goto cleanup; |
| } |
| |
| /* Is this a valid object id? */ |
| if ((error = git_oid_fromstr(&id, buffer)) < GIT_SUCCESS) |
| goto cleanup; |
| |
| refname_end = memchr(refname_begin, '\n', buffer_end - refname_begin); |
| if (refname_end == NULL) { |
| error = GIT_EPACKEDREFSCORRUPTED; |
| goto cleanup; |
| } |
| |
| if (refname_end[-1] == '\r') |
| refname_end--; |
| |
| refname_len = refname_end - refname_begin; |
| |
| ref = git__malloc(sizeof(struct packref) + refname_len + 1); |
| |
| memcpy(ref->name, refname_begin, refname_len); |
| ref->name[refname_len] = 0; |
| |
| git_oid_cpy(&ref->oid, &id); |
| |
| ref->flags = 0; |
| |
| *ref_out = ref; |
| *buffer_out = refname_end + 1; |
| |
| return GIT_SUCCESS; |
| |
| cleanup: |
| free(ref); |
| return git__rethrow(error, "Failed to parse OID of packed reference"); |
| } |
| |
| static int packed_load(git_repository *repo) |
| { |
| int error = GIT_SUCCESS, updated; |
| git_fbuffer packfile = GIT_FBUFFER_INIT; |
| const char *buffer_start, *buffer_end; |
| git_refcache *ref_cache = &repo->references; |
| |
| /* First we make sure we have allocated the hash table */ |
| if (ref_cache->packfile == NULL) { |
| ref_cache->packfile = git_hashtable_alloc( |
| default_table_size, git_hash__strhash_cb, git_hash__strcmp_cb); |
| |
| if (ref_cache->packfile == NULL) { |
| error = GIT_ENOMEM; |
| goto cleanup; |
| } |
| } |
| |
| error = reference_read(&packfile, &ref_cache->packfile_time, |
| repo->path_repository, GIT_PACKEDREFS_FILE, &updated); |
| |
| /* |
| * If we couldn't find the file, we need to clear the table and |
| * return. On any other error, we return that error. If everything |
| * went fine and the file wasn't updated, then there's nothing new |
| * for us here, so just return. Anything else means we need to |
| * refresh the packed refs. |
| */ |
| if (error == GIT_ENOTFOUND) { |
| git_hashtable_clear(ref_cache->packfile); |
| return GIT_SUCCESS; |
| } else if (error < GIT_SUCCESS) { |
| return git__rethrow(error, "Failed to read packed refs"); |
| } else if (!updated) { |
| return GIT_SUCCESS; |
| } |
| |
| /* |
| * At this point, we want to refresh the packed refs. We already |
| * have the contents in our buffer. |
| */ |
| |
| git_hashtable_clear(ref_cache->packfile); |
| |
| buffer_start = (const char *)packfile.data; |
| buffer_end = (const char *)(buffer_start) + packfile.len; |
| |
| while (buffer_start < buffer_end && buffer_start[0] == '#') { |
| buffer_start = strchr(buffer_start, '\n'); |
| if (buffer_start == NULL) { |
| error = GIT_EPACKEDREFSCORRUPTED; |
| goto cleanup; |
| } |
| buffer_start++; |
| } |
| |
| while (buffer_start < buffer_end) { |
| struct packref *ref = NULL; |
| |
| error = packed_parse_oid(&ref, &buffer_start, buffer_end); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| if (buffer_start[0] == '^') { |
| error = packed_parse_peel(ref, &buffer_start, buffer_end); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| } |
| |
| error = git_hashtable_insert(ref_cache->packfile, ref->name, ref); |
| if (error < GIT_SUCCESS) { |
| free(ref); |
| goto cleanup; |
| } |
| } |
| |
| git_futils_freebuffer(&packfile); |
| return GIT_SUCCESS; |
| |
| cleanup: |
| git_hashtable_free(ref_cache->packfile); |
| ref_cache->packfile = NULL; |
| git_futils_freebuffer(&packfile); |
| return git__rethrow(error, "Failed to load packed references"); |
| } |
| |
| |
| struct dirent_list_data { |
| git_repository *repo; |
| size_t repo_path_len; |
| unsigned int list_flags; |
| |
| int (*callback)(const char *, void *); |
| void *callback_payload; |
| }; |
| |
| static int _dirent_loose_listall(void *_data, git_buf *full_path) |
| { |
| struct dirent_list_data *data = (struct dirent_list_data *)_data; |
| const char *file_path = full_path->ptr + data->repo_path_len; |
| |
| if (git_path_isdir(full_path->ptr) == GIT_SUCCESS) |
| return git_path_direach(full_path, _dirent_loose_listall, _data); |
| |
| /* do not add twice a reference that exists already in the packfile */ |
| if ((data->list_flags & GIT_REF_PACKED) != 0 && |
| git_hashtable_lookup(data->repo->references.packfile, file_path) != NULL) |
| return GIT_SUCCESS; |
| |
| if (data->list_flags != GIT_REF_LISTALL) { |
| if ((data->list_flags & loose_guess_rtype(full_path)) == 0) |
| return GIT_SUCCESS; /* we are filtering out this reference */ |
| } |
| |
| return data->callback(file_path, data->callback_payload); |
| } |
| |
| static int _dirent_loose_load(void *data, git_buf *full_path) |
| { |
| git_repository *repository = (git_repository *)data; |
| void *old_ref = NULL; |
| struct packref *ref; |
| const char *file_path; |
| int error; |
| |
| if (git_path_isdir(full_path->ptr) == GIT_SUCCESS) |
| return git_path_direach(full_path, _dirent_loose_load, repository); |
| |
| file_path = full_path->ptr + strlen(repository->path_repository); |
| error = loose_lookup_to_packfile(&ref, repository, file_path); |
| |
| if (error == GIT_SUCCESS) { |
| |
| if (git_hashtable_insert2( |
| repository->references.packfile, |
| ref->name, ref, &old_ref) < GIT_SUCCESS) { |
| free(ref); |
| return GIT_ENOMEM; |
| } |
| |
| if (old_ref != NULL) |
| free(old_ref); |
| } |
| |
| return error == GIT_SUCCESS ? |
| GIT_SUCCESS : |
| git__rethrow(error, "Failed to load loose references into packfile"); |
| } |
| |
| /* |
| * Load all the loose references from the repository |
| * into the in-memory Packfile, and build a vector with |
| * all the references so it can be written back to |
| * disk. |
| */ |
| static int packed_loadloose(git_repository *repository) |
| { |
| int error = GIT_SUCCESS; |
| git_buf refs_path = GIT_BUF_INIT; |
| |
| /* the packfile must have been previously loaded! */ |
| assert(repository->references.packfile); |
| |
| if ((error = git_buf_joinpath(&refs_path, |
| repository->path_repository, GIT_REFS_DIR)) < GIT_SUCCESS) |
| return error; |
| |
| /* |
| * Load all the loose files from disk into the Packfile table. |
| * This will overwrite any old packed entries with their |
| * updated loose versions |
| */ |
| error = git_path_direach(&refs_path, _dirent_loose_load, repository); |
| git_buf_free(&refs_path); |
| return error; |
| } |
| |
| /* |
| * Write a single reference into a packfile |
| */ |
| static int packed_write_ref(struct packref *ref, git_filebuf *file) |
| { |
| int error; |
| char oid[GIT_OID_HEXSZ + 1]; |
| |
| git_oid_fmt(oid, &ref->oid); |
| oid[GIT_OID_HEXSZ] = 0; |
| |
| /* |
| * For references that peel to an object in the repo, we must |
| * write the resulting peel on a separate line, e.g. |
| * |
| * 6fa8a902cc1d18527e1355773c86721945475d37 refs/tags/libgit2-0.4 |
| * ^2ec0cb7959b0bf965d54f95453f5b4b34e8d3100 |
| * |
| * This obviously only applies to tags. |
| * The required peels have already been loaded into `ref->peel_target`. |
| */ |
| if (ref->flags & GIT_PACKREF_HAS_PEEL) { |
| char peel[GIT_OID_HEXSZ + 1]; |
| git_oid_fmt(peel, &ref->peel); |
| peel[GIT_OID_HEXSZ] = 0; |
| |
| error = git_filebuf_printf(file, "%s %s\n^%s\n", oid, ref->name, peel); |
| } else { |
| error = git_filebuf_printf(file, "%s %s\n", oid, ref->name); |
| } |
| |
| return error == GIT_SUCCESS ? |
| GIT_SUCCESS : |
| git__rethrow(error, "Failed to write packed reference"); |
| } |
| |
| /* |
| * Find out what object this reference resolves to. |
| * |
| * For references that point to a 'big' tag (e.g. an |
| * actual tag object on the repository), we need to |
| * cache on the packfile the OID of the object to |
| * which that 'big tag' is pointing to. |
| */ |
| static int packed_find_peel(git_repository *repo, struct packref *ref) |
| { |
| git_object *object; |
| int error; |
| |
| if (ref->flags & GIT_PACKREF_HAS_PEEL) |
| return GIT_SUCCESS; |
| |
| /* |
| * Only applies to tags, i.e. references |
| * in the /refs/tags folder |
| */ |
| if (git__prefixcmp(ref->name, GIT_REFS_TAGS_DIR) != 0) |
| return GIT_SUCCESS; |
| |
| /* |
| * Find the tagged object in the repository |
| */ |
| error = git_object_lookup(&object, repo, &ref->oid, GIT_OBJ_ANY); |
| if (error < GIT_SUCCESS) |
| return git__throw(GIT_EOBJCORRUPTED, "Failed to find packed reference"); |
| |
| /* |
| * If the tagged object is a Tag object, we need to resolve it; |
| * if the ref is actually a 'weak' ref, we don't need to resolve |
| * anything. |
| */ |
| if (git_object_type(object) == GIT_OBJ_TAG) { |
| git_tag *tag = (git_tag *)object; |
| |
| /* |
| * Find the object pointed at by this tag |
| */ |
| git_oid_cpy(&ref->peel, git_tag_target_oid(tag)); |
| ref->flags |= GIT_PACKREF_HAS_PEEL; |
| |
| /* |
| * The reference has now cached the resolved OID, and is |
| * marked at such. When written to the packfile, it'll be |
| * accompanied by this resolved oid |
| */ |
| } |
| |
| git_object_free(object); |
| return GIT_SUCCESS; |
| } |
| |
| /* |
| * Remove all loose references |
| * |
| * Once we have successfully written a packfile, |
| * all the loose references that were packed must be |
| * removed from disk. |
| * |
| * This is a dangerous method; make sure the packfile |
| * is well-written, because we are destructing references |
| * here otherwise. |
| */ |
| static int packed_remove_loose(git_repository *repo, git_vector *packing_list) |
| { |
| unsigned int i; |
| git_buf full_path = GIT_BUF_INIT; |
| int error = GIT_SUCCESS; |
| |
| for (i = 0; i < packing_list->length; ++i) { |
| struct packref *ref = git_vector_get(packing_list, i); |
| int an_error; |
| |
| if ((ref->flags & GIT_PACKREF_WAS_LOOSE) == 0) |
| continue; |
| |
| an_error = git_buf_joinpath(&full_path, repo->path_repository, ref->name); |
| |
| if (an_error == GIT_SUCCESS && |
| git_path_exists(full_path.ptr) == GIT_SUCCESS && |
| p_unlink(full_path.ptr) < GIT_SUCCESS) |
| an_error = GIT_EOSERR; |
| |
| /* keep the error if we haven't seen one yet */ |
| if (error > an_error) |
| error = an_error; |
| |
| /* |
| * if we fail to remove a single file, this is *not* good, |
| * but we should keep going and remove as many as possible. |
| * After we've removed as many files as possible, we return |
| * the error code anyway. |
| */ |
| } |
| |
| git_buf_free(&full_path); |
| |
| return error == GIT_SUCCESS ? |
| GIT_SUCCESS : |
| git__rethrow(error, "Failed to remove loose packed reference"); |
| } |
| |
| static int packed_sort(const void *a, const void *b) |
| { |
| const struct packref *ref_a = (const struct packref *)a; |
| const struct packref *ref_b = (const struct packref *)b; |
| |
| return strcmp(ref_a->name, ref_b->name); |
| } |
| |
| /* |
| * Write all the contents in the in-memory packfile to disk. |
| */ |
| static int packed_write(git_repository *repo) |
| { |
| git_filebuf pack_file = GIT_FILEBUF_INIT; |
| int error; |
| const char *errmsg = "Failed to write packed references file"; |
| unsigned int i; |
| git_buf pack_file_path = GIT_BUF_INIT; |
| git_vector packing_list; |
| size_t total_refs; |
| |
| assert(repo && repo->references.packfile); |
| |
| total_refs = repo->references.packfile->key_count; |
| if ((error = |
| git_vector_init(&packing_list, total_refs, packed_sort)) < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to init packed references list"); |
| |
| /* Load all the packfile into a vector */ |
| { |
| struct packref *reference; |
| const void *GIT_UNUSED(_unused); |
| |
| GIT_HASHTABLE_FOREACH(repo->references.packfile, _unused, reference, |
| /* cannot fail: vector already has the right size */ |
| git_vector_insert(&packing_list, reference); |
| ); |
| } |
| |
| /* sort the vector so the entries appear sorted on the packfile */ |
| git_vector_sort(&packing_list); |
| |
| /* Now we can open the file! */ |
| error = git_buf_joinpath(&pack_file_path, repo->path_repository, GIT_PACKEDREFS_FILE); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| if ((error = git_filebuf_open(&pack_file, pack_file_path.ptr, 0)) < GIT_SUCCESS) { |
| errmsg = "Failed to open packed references file"; |
| goto cleanup; |
| } |
| |
| /* Packfiles have a header... apparently |
| * This is in fact not required, but we might as well print it |
| * just for kicks */ |
| if ((error = |
| git_filebuf_printf(&pack_file, "%s\n", GIT_PACKEDREFS_HEADER)) < GIT_SUCCESS) { |
| errmsg = "Failed to write packed references file header"; |
| goto cleanup; |
| } |
| |
| for (i = 0; i < packing_list.length; ++i) { |
| struct packref *ref = (struct packref *)git_vector_get(&packing_list, i); |
| |
| if ((error = packed_find_peel(repo, ref)) < GIT_SUCCESS) { |
| error = git__throw(GIT_EOBJCORRUPTED, |
| "A reference cannot be peeled"); |
| goto cleanup; |
| } |
| |
| if ((error = packed_write_ref(ref, &pack_file)) < GIT_SUCCESS) |
| goto cleanup; |
| } |
| |
| cleanup: |
| /* if we've written all the references properly, we can commit |
| * the packfile to make the changes effective */ |
| if (error == GIT_SUCCESS) { |
| error = git_filebuf_commit(&pack_file, GIT_PACKEDREFS_FILE_MODE); |
| |
| /* when and only when the packfile has been properly written, |
| * we can go ahead and remove the loose refs */ |
| if (error == GIT_SUCCESS) { |
| struct stat st; |
| |
| error = packed_remove_loose(repo, &packing_list); |
| |
| if (p_stat(pack_file_path.ptr, &st) == GIT_SUCCESS) |
| repo->references.packfile_time = st.st_mtime; |
| } |
| } |
| else git_filebuf_cleanup(&pack_file); |
| |
| git_vector_free(&packing_list); |
| git_buf_free(&pack_file_path); |
| |
| if (error < GIT_SUCCESS) |
| git__rethrow(error, "%s", errmsg); |
| |
| return error; |
| } |
| |
| static int _reference_available_cb(const char *ref, void *data) |
| { |
| const char *new, *old; |
| const char **refs; |
| |
| assert(ref && data); |
| |
| refs = (const char **)data; |
| |
| new = (const char *)refs[0]; |
| old = (const char *)refs[1]; |
| |
| if (!old || strcmp(old, ref)) { |
| int reflen = strlen(ref); |
| int newlen = strlen(new); |
| int cmplen = reflen < newlen ? reflen : newlen; |
| const char *lead = reflen < newlen ? new : ref; |
| |
| if (!strncmp(new, ref, cmplen) && |
| lead[cmplen] == '/') |
| return GIT_EEXISTS; |
| } |
| |
| return GIT_SUCCESS; |
| } |
| |
| static int reference_available( |
| git_repository *repo, |
| const char *ref, |
| const char* old_ref) |
| { |
| const char *refs[2]; |
| |
| refs[0] = ref; |
| refs[1] = old_ref; |
| |
| if (git_reference_foreach(repo, GIT_REF_LISTALL, |
| _reference_available_cb, (void *)refs) < 0) { |
| return git__throw(GIT_EEXISTS, |
| "Reference name `%s` conflicts with existing reference", ref); |
| } |
| |
| return GIT_SUCCESS; |
| } |
| |
| static int reference_exists(int *exists, git_repository *repo, const char *ref_name) |
| { |
| int error; |
| git_buf ref_path = GIT_BUF_INIT; |
| |
| error = packed_load(repo); |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, "Cannot resolve if a reference exists"); |
| |
| error = git_buf_joinpath(&ref_path, repo->path_repository, ref_name); |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, "Cannot resolve if a reference exists"); |
| |
| if (git_path_isfile(ref_path.ptr) == GIT_SUCCESS || |
| git_hashtable_lookup(repo->references.packfile, ref_path.ptr) != NULL) { |
| *exists = 1; |
| } else { |
| *exists = 0; |
| } |
| |
| git_buf_free(&ref_path); |
| |
| return GIT_SUCCESS; |
| } |
| |
| static int packed_lookup(git_reference *ref) |
| { |
| int error; |
| struct packref *pack_ref = NULL; |
| |
| error = packed_load(ref->owner); |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, |
| "Failed to lookup reference from packfile"); |
| |
| if (ref->flags & GIT_REF_PACKED && |
| ref->mtime == ref->owner->references.packfile_time) |
| return GIT_SUCCESS; |
| |
| if (ref->flags & GIT_REF_SYMBOLIC) { |
| free(ref->target.symbolic); |
| ref->target.symbolic = NULL; |
| } |
| |
| /* Look up on the packfile */ |
| pack_ref = git_hashtable_lookup(ref->owner->references.packfile, ref->name); |
| if (pack_ref == NULL) |
| return git__throw(GIT_ENOTFOUND, |
| "Failed to lookup reference from packfile"); |
| |
| ref->flags = GIT_REF_OID | GIT_REF_PACKED; |
| ref->mtime = ref->owner->references.packfile_time; |
| git_oid_cpy(&ref->target.oid, &pack_ref->oid); |
| |
| return GIT_SUCCESS; |
| } |
| |
| static int reference_lookup(git_reference *ref) |
| { |
| int error_loose, error_packed; |
| |
| error_loose = loose_lookup(ref); |
| if (error_loose == GIT_SUCCESS) |
| return GIT_SUCCESS; |
| |
| error_packed = packed_lookup(ref); |
| if (error_packed == GIT_SUCCESS) |
| return GIT_SUCCESS; |
| |
| git_reference_free(ref); |
| |
| if (error_loose != GIT_ENOTFOUND) |
| return git__rethrow(error_loose, "Failed to lookup reference"); |
| |
| if (error_packed != GIT_ENOTFOUND) |
| return git__rethrow(error_packed, "Failed to lookup reference"); |
| |
| return git__throw(GIT_ENOTFOUND, "Reference not found"); |
| } |
| |
| /* |
| * Delete a reference. |
| * This is an internal method; the reference is removed |
| * from disk or the packfile, but the pointer is not freed |
| */ |
| static int reference_delete(git_reference *ref) |
| { |
| int error; |
| |
| assert(ref); |
| |
| /* If the reference is packed, this is an expensive operation. |
| * We need to reload the packfile, remove the reference from the |
| * packing list, and repack */ |
| if (ref->flags & GIT_REF_PACKED) { |
| struct packref *packref; |
| /* load the existing packfile */ |
| if ((error = packed_load(ref->owner)) < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to delete reference"); |
| |
| if (git_hashtable_remove2(ref->owner->references.packfile, |
| ref->name, (void **) &packref) < GIT_SUCCESS) |
| return git__throw(GIT_ENOTFOUND, "Reference not found"); |
| |
| git__free (packref); |
| error = packed_write(ref->owner); |
| |
| /* If the reference is loose, we can just remove the reference |
| * from the filesystem */ |
| } else { |
| git_reference *ref_in_pack; |
| git_buf full_path = GIT_BUF_INIT; |
| |
| error = git_buf_joinpath(&full_path, ref->owner->path_repository, ref->name); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| error = p_unlink(full_path.ptr); |
| git_buf_free(&full_path); /* done with path at this point */ |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| /* When deleting a loose reference, we have to ensure that an older |
| * packed version of it doesn't exist */ |
| if (git_reference_lookup(&ref_in_pack, ref->owner, |
| ref->name) == GIT_SUCCESS) { |
| assert((ref_in_pack->flags & GIT_REF_PACKED) != 0); |
| error = git_reference_delete(ref_in_pack); |
| } |
| } |
| |
| cleanup: |
| return error == GIT_SUCCESS ? |
| GIT_SUCCESS : |
| git__rethrow(error, "Failed to delete reference"); |
| } |
| |
| int git_reference_delete(git_reference *ref) |
| { |
| int error = reference_delete(ref); |
| if (error < GIT_SUCCESS) |
| return error; |
| |
| git_reference_free(ref); |
| return GIT_SUCCESS; |
| } |
| |
| |
| int git_reference_lookup(git_reference **ref_out, |
| git_repository *repo, const char *name) |
| { |
| int error; |
| char normalized_name[GIT_REFNAME_MAX]; |
| git_reference *ref = NULL; |
| |
| assert(ref_out && repo && name); |
| |
| *ref_out = NULL; |
| |
| error = normalize_name(normalized_name, sizeof(normalized_name), name, 0); |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to lookup reference"); |
| |
| error = reference_alloc(&ref, repo, normalized_name); |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to lookup reference"); |
| |
| error = reference_lookup(ref); |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to lookup reference"); |
| |
| *ref_out = ref; |
| return GIT_SUCCESS; |
| } |
| |
| /** |
| * Getters |
| */ |
| git_rtype git_reference_type(git_reference *ref) |
| { |
| assert(ref); |
| |
| if (ref->flags & GIT_REF_OID) |
| return GIT_REF_OID; |
| |
| if (ref->flags & GIT_REF_SYMBOLIC) |
| return GIT_REF_SYMBOLIC; |
| |
| return GIT_REF_INVALID; |
| } |
| |
| int git_reference_is_packed(git_reference *ref) |
| { |
| assert(ref); |
| return !!(ref->flags & GIT_REF_PACKED); |
| } |
| |
| const char *git_reference_name(git_reference *ref) |
| { |
| assert(ref); |
| return ref->name; |
| } |
| |
| git_repository *git_reference_owner(git_reference *ref) |
| { |
| assert(ref); |
| return ref->owner; |
| } |
| |
| const git_oid *git_reference_oid(git_reference *ref) |
| { |
| assert(ref); |
| |
| if ((ref->flags & GIT_REF_OID) == 0) |
| return NULL; |
| |
| return &ref->target.oid; |
| } |
| |
| const char *git_reference_target(git_reference *ref) |
| { |
| assert(ref); |
| |
| if ((ref->flags & GIT_REF_SYMBOLIC) == 0) |
| return NULL; |
| |
| return ref->target.symbolic; |
| } |
| |
| int git_reference_create_symbolic( |
| git_reference **ref_out, |
| git_repository *repo, |
| const char *name, |
| const char *target, |
| int force) |
| { |
| char normalized[GIT_REFNAME_MAX]; |
| int ref_exists, error = GIT_SUCCESS; |
| git_reference *ref = NULL; |
| |
| error = normalize_name(normalized, sizeof(normalized), name, 0); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| if ((error = reference_exists(&ref_exists, repo, normalized) < GIT_SUCCESS)) |
| return git__rethrow(error, "Failed to create symbolic reference"); |
| |
| if (ref_exists && !force) |
| return git__throw(GIT_EEXISTS, |
| "Failed to create symbolic reference. Reference already exists"); |
| |
| error = reference_alloc(&ref, repo, normalized); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| ref->flags |= GIT_REF_SYMBOLIC; |
| |
| /* set the target; this will normalize the name automatically |
| * and write the reference on disk */ |
| error = git_reference_set_target(ref, target); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| if (ref_out == NULL) { |
| git_reference_free(ref); |
| } else { |
| *ref_out = ref; |
| } |
| |
| return GIT_SUCCESS; |
| |
| cleanup: |
| git_reference_free(ref); |
| return git__rethrow(error, "Failed to create symbolic reference"); |
| } |
| |
| int git_reference_create_oid( |
| git_reference **ref_out, |
| git_repository *repo, |
| const char *name, |
| const git_oid *id, |
| int force) |
| { |
| int error = GIT_SUCCESS, ref_exists; |
| git_reference *ref = NULL; |
| char normalized[GIT_REFNAME_MAX]; |
| |
| error = normalize_name(normalized, sizeof(normalized), name, 1); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| if ((error = reference_exists(&ref_exists, repo, normalized) < GIT_SUCCESS)) |
| return git__rethrow(error, "Failed to create OID reference"); |
| |
| if (ref_exists && !force) |
| return git__throw(GIT_EEXISTS, |
| "Failed to create OID reference. Reference already exists"); |
| |
| if ((error = reference_available(repo, name, NULL)) < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to create reference"); |
| |
| error = reference_alloc(&ref, repo, name); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| ref->flags |= GIT_REF_OID; |
| |
| /* set the oid; this will write the reference on disk */ |
| error = git_reference_set_oid(ref, id); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| if (ref_out == NULL) { |
| git_reference_free(ref); |
| } else { |
| *ref_out = ref; |
| } |
| |
| return GIT_SUCCESS; |
| |
| cleanup: |
| git_reference_free(ref); |
| return git__rethrow(error, "Failed to create reference OID"); |
| } |
| |
| /* |
| * Change the OID target of a reference. |
| * |
| * For both loose and packed references, just change |
| * the oid in memory and (over)write the file in disk. |
| * |
| * We do not repack packed references because of performance |
| * reasons. |
| */ |
| int git_reference_set_oid(git_reference *ref, const git_oid *id) |
| { |
| int error = GIT_SUCCESS, exists; |
| git_odb *odb = NULL; |
| |
| if ((ref->flags & GIT_REF_OID) == 0) |
| return git__throw(GIT_EINVALIDREFSTATE, |
| "Failed to set OID target of reference. Not an OID reference"); |
| |
| assert(ref->owner); |
| |
| error = git_repository_odb__weakptr(&odb, ref->owner); |
| if (error < GIT_SUCCESS) |
| return error; |
| |
| exists = git_odb_exists(odb, id); |
| |
| git_odb_free(odb); |
| |
| /* Don't let the user create references to OIDs that |
| * don't exist in the ODB */ |
| if (!exists) |
| return git__throw(GIT_ENOTFOUND, |
| "Failed to set OID target of reference. OID doesn't exist in ODB"); |
| |
| /* Update the OID value on `ref` */ |
| git_oid_cpy(&ref->target.oid, id); |
| |
| /* Write back to disk */ |
| error = loose_write(ref); |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to set OID target of reference"); |
| |
| return GIT_SUCCESS; |
| } |
| |
| /* |
| * Change the target of a symbolic reference. |
| * |
| * This is easy because symrefs cannot be inside |
| * a pack. We just change the target in memory |
| * and overwrite the file on disk. |
| */ |
| int git_reference_set_target(git_reference *ref, const char *target) |
| { |
| int error; |
| char normalized[GIT_REFNAME_MAX]; |
| |
| if ((ref->flags & GIT_REF_SYMBOLIC) == 0) |
| return git__throw(GIT_EINVALIDREFSTATE, |
| "Failed to set reference target. Not a symbolic reference"); |
| |
| error = normalize_name(normalized, sizeof(normalized), target, 0); |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, |
| "Failed to set reference target. Invalid target name"); |
| |
| git__free(ref->target.symbolic); |
| ref->target.symbolic = git__strdup(normalized); |
| if (ref->target.symbolic == NULL) |
| return GIT_ENOMEM; |
| |
| return loose_write(ref); |
| } |
| |
| int git_reference_rename(git_reference *ref, const char *new_name, int force) |
| { |
| int error; |
| git_buf aux_path = GIT_BUF_INIT; |
| char normalized[GIT_REFNAME_MAX]; |
| |
| const char *head_target = NULL; |
| git_reference *existing_ref = NULL, *head = NULL; |
| |
| error = normalize_name(normalized, sizeof(normalized), |
| new_name, ref->flags & GIT_REF_OID); |
| |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to rename reference. Invalid name"); |
| |
| new_name = normalized; |
| |
| /* If we are forcing the rename, try to lookup a reference with the |
| * new one. If the lookup succeeds, we need to delete that ref |
| * before the renaming can proceed */ |
| if (force) { |
| error = git_reference_lookup(&existing_ref, ref->owner, new_name); |
| |
| if (error == GIT_SUCCESS) { |
| error = git_reference_delete(existing_ref); |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, |
| "Failed to rename reference. " |
| "The existing reference cannot be deleted"); |
| } else if (error != GIT_ENOTFOUND) |
| goto cleanup; |
| |
| /* If we're not forcing the rename, check if the reference exists. |
| * If it does, renaming cannot continue */ |
| } else { |
| int exists; |
| |
| error = reference_exists(&exists, ref->owner, normalized); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| if (exists) |
| return git__throw(GIT_EEXISTS, |
| "Failed to rename reference. Reference already exists"); |
| } |
| |
| if ((error = reference_available(ref->owner, new_name, ref->name)) < GIT_SUCCESS) |
| return git__rethrow(error, |
| "Failed to rename reference. Reference already exists"); |
| |
| /* Initialize path now so we won't get an allocation failure once |
| * we actually start removing things. |
| */ |
| error = git_buf_joinpath(&aux_path, ref->owner->path_repository, new_name); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| /* |
| * Now delete the old ref and remove an possibly existing directory |
| * named `new_name`. Note that using the internal `reference_delete` |
| * method deletes the ref from disk but doesn't free the pointer, so |
| * we can still access the ref's attributes for creating the new one |
| */ |
| if ((error = reference_delete(ref)) < GIT_SUCCESS) |
| goto cleanup; |
| |
| if (git_path_exists(aux_path.ptr) == GIT_SUCCESS) { |
| if (git_path_isdir(aux_path.ptr) == GIT_SUCCESS) { |
| if ((error = git_futils_rmdir_r(aux_path.ptr, 0)) < GIT_SUCCESS) |
| goto rollback; |
| } else goto rollback; |
| } |
| |
| /* |
| * Finally we can create the new reference. |
| */ |
| if (ref->flags & GIT_REF_SYMBOLIC) { |
| error = git_reference_create_symbolic( |
| NULL, ref->owner, new_name, ref->target.symbolic, 0); |
| } else { |
| error = git_reference_create_oid( |
| NULL, ref->owner, new_name, &ref->target.oid, 0); |
| } |
| |
| if (error < GIT_SUCCESS) |
| goto rollback; |
| |
| /* |
| * Check if we have to update HEAD. |
| */ |
| error = git_reference_lookup(&head, ref->owner, GIT_HEAD_FILE); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| head_target = git_reference_target(head); |
| |
| if (head_target && !strcmp(head_target, ref->name)) { |
| error = git_reference_create_symbolic( |
| &head, ref->owner, "HEAD", new_name, 1); |
| |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| } |
| |
| /* |
| * Rename the reflog file. |
| */ |
| error = git_buf_join_n(&aux_path, '/', 3, ref->owner->path_repository, |
| GIT_REFLOG_DIR, ref->name); |
| if (error < GIT_SUCCESS) |
| goto cleanup; |
| |
| if (git_path_exists(aux_path.ptr) == GIT_SUCCESS) |
| error = git_reflog_rename(ref, new_name); |
| |
| /* |
| * Change the name of the reference given by the user. |
| */ |
| git__free(ref->name); |
| ref->name = git__strdup(new_name); |
| |
| /* The reference is no longer packed */ |
| ref->flags &= ~GIT_REF_PACKED; |
| |
| cleanup: |
| /* We no longer need the newly created reference nor the head */ |
| git_reference_free(head); |
| git_buf_free(&aux_path); |
| return error == GIT_SUCCESS ? |
| GIT_SUCCESS : |
| git__rethrow(error, "Failed to rename reference"); |
| |
| rollback: |
| /* |
| * Try to create the old reference again. |
| */ |
| if (ref->flags & GIT_REF_SYMBOLIC) |
| error = git_reference_create_symbolic( |
| NULL, ref->owner, ref->name, ref->target.symbolic, 0); |
| else |
| error = git_reference_create_oid( |
| NULL, ref->owner, ref->name, &ref->target.oid, 0); |
| |
| /* The reference is no longer packed */ |
| ref->flags &= ~GIT_REF_PACKED; |
| |
| git_buf_free(&aux_path); |
| |
| return error == GIT_SUCCESS ? |
| git__rethrow(GIT_ERROR, "Failed to rename reference. Did rollback") : |
| git__rethrow(error, "Failed to rename reference. Failed to rollback"); |
| } |
| |
| int git_reference_resolve(git_reference **ref_out, git_reference *ref) |
| { |
| int error, i = 0; |
| git_repository *repo; |
| |
| assert(ref); |
| |
| *ref_out = NULL; |
| repo = ref->owner; |
| |
| /* If the reference is already resolved, we need to return a |
| * copy. Instead of duplicating `ref`, we look it up again to |
| * ensure the copy is out to date */ |
| if (ref->flags & GIT_REF_OID) |
| return git_reference_lookup(ref_out, ref->owner, ref->name); |
| |
| /* Otherwise, keep iterating until the reference is resolved */ |
| for (i = 0; i < MAX_NESTING_LEVEL; ++i) { |
| git_reference *new_ref; |
| |
| error = git_reference_lookup(&new_ref, repo, ref->target.symbolic); |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to resolve reference"); |
| |
| /* Free intermediate references, except for the original one |
| * we've received */ |
| if (i > 0) |
| git_reference_free(ref); |
| |
| ref = new_ref; |
| |
| /* When the reference we've just looked up is an OID, we've |
| * successfully resolved the symbolic ref */ |
| if (ref->flags & GIT_REF_OID) { |
| *ref_out = ref; |
| return GIT_SUCCESS; |
| } |
| } |
| |
| return git__throw(GIT_ENOMEM, |
| "Failed to resolve reference. Reference is too nested"); |
| } |
| |
| int git_reference_packall(git_repository *repo) |
| { |
| int error; |
| |
| /* load the existing packfile */ |
| if ((error = packed_load(repo)) < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to pack references"); |
| |
| /* update it in-memory with all the loose references */ |
| if ((error = packed_loadloose(repo)) < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to pack references"); |
| |
| /* write it back to disk */ |
| return packed_write(repo); |
| } |
| |
| int git_reference_foreach( |
| git_repository *repo, |
| unsigned int list_flags, |
| int (*callback)(const char *, void *), |
| void *payload) |
| { |
| int error; |
| struct dirent_list_data data; |
| git_buf refs_path = GIT_BUF_INIT; |
| |
| /* list all the packed references first */ |
| if (list_flags & GIT_REF_PACKED) { |
| const char *ref_name; |
| void *GIT_UNUSED(_unused); |
| |
| if ((error = packed_load(repo)) < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to list references"); |
| |
| GIT_HASHTABLE_FOREACH(repo->references.packfile, ref_name, _unused, |
| if ((error = callback(ref_name, payload)) < GIT_SUCCESS) |
| return git__throw(error, |
| "Failed to list references. User callback failed"); |
| ); |
| } |
| |
| /* now list the loose references, trying not to |
| * duplicate the ref names already in the packed-refs file */ |
| |
| data.repo_path_len = strlen(repo->path_repository); |
| data.list_flags = list_flags; |
| data.repo = repo; |
| data.callback = callback; |
| data.callback_payload = payload; |
| |
| if ((error = git_buf_joinpath(&refs_path, |
| repo->path_repository, GIT_REFS_DIR)) < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to alloc space for references"); |
| |
| error = git_path_direach(&refs_path, _dirent_loose_listall, &data); |
| |
| git_buf_free(&refs_path); |
| |
| return error; |
| } |
| |
| static int cb__reflist_add(const char *ref, void *data) |
| { |
| return git_vector_insert((git_vector *)data, git__strdup(ref)); |
| } |
| |
| int git_reference_listall( |
| git_strarray *array, |
| git_repository *repo, |
| unsigned int list_flags) |
| { |
| int error; |
| git_vector ref_list; |
| |
| assert(array && repo); |
| |
| array->strings = NULL; |
| array->count = 0; |
| |
| if (git_vector_init(&ref_list, 8, NULL) < GIT_SUCCESS) |
| return GIT_ENOMEM; |
| |
| error = git_reference_foreach( |
| repo, list_flags, &cb__reflist_add, (void *)&ref_list); |
| |
| if (error < GIT_SUCCESS) { |
| git_vector_free(&ref_list); |
| return error; |
| } |
| |
| array->strings = (char **)ref_list.contents; |
| array->count = ref_list.length; |
| return GIT_SUCCESS; |
| } |
| |
| int git_reference_reload(git_reference *ref) |
| { |
| int error = reference_lookup(ref); |
| |
| if (error < GIT_SUCCESS) |
| return git__rethrow(error, "Failed to reload reference"); |
| |
| return GIT_SUCCESS; |
| } |
| |
| |
| void git_repository__refcache_free(git_refcache *refs) |
| { |
| assert(refs); |
| |
| if (refs->packfile) { |
| const void *GIT_UNUSED(_unused); |
| struct packref *reference; |
| |
| GIT_HASHTABLE_FOREACH(refs->packfile, _unused, reference, |
| free(reference); |
| ); |
| |
| git_hashtable_free(refs->packfile); |
| } |
| } |
| |
| 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 normalize_name( |
| char *buffer_out, |
| size_t out_size, |
| const char *name, |
| int is_oid_ref) |
| { |
| const char *name_end, *buffer_out_start; |
| const char *current; |
| int contains_a_slash = 0; |
| |
| assert(name && buffer_out); |
| |
| buffer_out_start = buffer_out; |
| current = name; |
| name_end = name + strlen(name); |
| |
| /* Terminating null byte */ |
| out_size--; |
| |
| /* A refname can not be empty */ |
| if (name_end == name) |
| return git__throw(GIT_EINVALIDREFNAME, |
| "Failed to normalize name. Reference name is empty"); |
| |
| /* A refname can not end with a dot or a slash */ |
| if (*(name_end - 1) == '.' || *(name_end - 1) == '/') |
| return git__throw(GIT_EINVALIDREFNAME, |
| "Failed to normalize name. Reference name ends with dot or slash"); |
| |
| while (current < name_end && out_size) { |
| if (!is_valid_ref_char(*current)) |
| return git__throw(GIT_EINVALIDREFNAME, |
| "Failed to normalize name. " |
| "Reference name contains invalid characters"); |
| |
| if (buffer_out > buffer_out_start) { |
| char prev = *(buffer_out - 1); |
| |
| /* A refname can not start with a dot nor contain a double dot */ |
| if (*current == '.' && ((prev == '.') || (prev == '/'))) |
| return git__throw(GIT_EINVALIDREFNAME, |
| "Failed to normalize name. " |
| "Reference name starts with a dot or contains a double dot"); |
| |
| /* '@{' is forbidden within a refname */ |
| if (*current == '{' && prev == '@') |
| return git__throw(GIT_EINVALIDREFNAME, |
| "Failed to normalize name. Reference name contains '@{'"); |
| |
| /* Prevent multiple slashes from being added to the output */ |
| if (*current == '/' && prev == '/') { |
| current++; |
| continue; |
| } |
| } |
| |
| if (*current == '/') |
| contains_a_slash = 1; |
| |
| *buffer_out++ = *current++; |
| out_size--; |
| } |
| |
| if (!out_size) |
| return git__throw(GIT_EINVALIDREFNAME, "Reference name is too long"); |
| |
| /* Object id refname have to contain at least one slash, except |
| * for HEAD in a detached state or MERGE_HEAD if we're in the |
| * middle of a merge */ |
| if (is_oid_ref && |
| !contains_a_slash && |
| strcmp(name, GIT_HEAD_FILE) != 0 && |
| strcmp(name, GIT_MERGE_HEAD_FILE) != 0 && |
| strcmp(name, GIT_FETCH_HEAD_FILE) != 0) |
| return git__throw(GIT_EINVALIDREFNAME, |
| "Failed to normalize name. Reference name contains no slashes"); |
| |
| /* A refname can not end with ".lock" */ |
| if (!git__suffixcmp(name, GIT_FILELOCK_EXTENSION)) |
| return git__throw(GIT_EINVALIDREFNAME, |
| "Failed to normalize name. Reference name ends with '.lock'"); |
| |
| *buffer_out = '\0'; |
| |
| /* |
| * For object id references, name has to start with refs/. Again, |
| * we need to allow HEAD to be in a detached state. |
| */ |
| if (is_oid_ref && !(git__prefixcmp(buffer_out_start, GIT_REFS_DIR) || |
| strcmp(buffer_out_start, GIT_HEAD_FILE))) |
| return git__throw(GIT_EINVALIDREFNAME, |
| "Failed to normalize name. " |
| "Reference name does not start with 'refs/'"); |
| |
| return GIT_SUCCESS; |
| } |
| |
| int git_reference__normalize_name( |
| char *buffer_out, |
| size_t out_size, |
| const char *name) |
| { |
| return normalize_name(buffer_out, out_size, name, 0); |
| } |
| |
| int git_reference__normalize_name_oid( |
| char *buffer_out, |
| size_t out_size, |
| const char *name) |
| { |
| return normalize_name(buffer_out, out_size, name, 1); |
| } |