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[2a01:4f8:120:2468::2]) by smtp.gmail.com with ESMTPSA id v19-20020a509553000000b0046cbcc86bdesm13052515eda.7.2023.01.17.05.57.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Jan 2023 05:57:05 -0800 (PST) From: =?utf-8?b?w4Z2YXIgQXJuZmrDtnLDsCBCamFybWFzb24=?= To: git@vger.kernel.org Cc: Junio C Hamano , Derrick Stolee , Victoria Dye , Jeff Hostetler , =?utf-8?b?w4Z2YXIgQXJuZmrDtnLDsCBC?= =?utf-8?b?amFybWFzb24=?= Subject: [PATCH] treewide: always have a valid "index_state.repo" member Date: Tue, 17 Jan 2023 14:57:00 +0100 Message-Id: X-Mailer: git-send-email 2.39.0.1225.g30a3d88132d In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org When the "repo" member was added to "the_index" in [1] the repo_read_index() was made to populate it, but the unpopulated "the_index" variable didn't get the same treatment. Let's do that in initialize_the_repository() when we set it up, and likewise for all of the current callers initialized an empty "struct index_state". This simplifies code that needs to deal with "the_index" or a custom "struct index_state", we no longer need to second-guess this part of the "index_state" deep in the stack. A recent example of such second-guessing is the "istate->repo ? istate->repo : the_repository" code in [2]. We can now simply use "istate->repo". We're doing this by making use of the INDEX_STATE_INIT() macro (and corresponding function) added in [3], which now have mandatory "repo" arguments. Because we now call index_state_init() in repository.c's initialize_the_repository() we don't need to handle the case where we have a "repo->index" whose "repo" member doesn't match the "repo" we're setting up, i.e. the "Complete the double-reference" code in repo_read_index() being altered here. That logic was originally added in [1], and was working around the lack of what we now have in initialize_the_repository(). For "fsmonitor-settings.c" we can remove the initialization of a NULL "r" argument to "the_repository". This was added back in [4], and was needed at the time for callers that would pass us the "r" from an "istate->repo". Before this change such a change to "fsmonitor-settings.c" would segfault all over the test suite (e.g. in t0002-gitfile.sh). This change has wider eventual implications for "fsmonitor-settings.c". The reason the other lazy loading behavior in it is required (starting with "if (!r->settings.fsmonitor) ..." is because of the previously passed "r" being "NULL". I have other local changes on top of this which move its configuration reading to "prepare_repo_settings()" in "repo-settings.c", as we could now start to rely on it being called for our "r". But let's leave all of that for now, and narrowly remove this particular part of the lazy-loading. 1. 1fd9ae517c4 (repository: add repo reference to index_state, 2021-01-23) 2. ee1f0c242ef (read-cache: add index.skipHash config option, 2023-01-06) 3. 2f6b1eb794e (cache API: add a "INDEX_STATE_INIT" macro/function, add release_index(), 2023-01-12) 4. 1e0ea5c4316 (fsmonitor: config settings are repository-specific, 2022-03-25) Signed-off-by: Ævar Arnfjörð Bjarmason --- This an updated verison of the 6/6 of [A], which per Junio's [B] wasn't picked up with those patches, which are now in "next". Junio: Now that Derrick's ds/omit-trailing-hash-in-index has landed on "master" this can be applied on top a merge of "master" and what you have in "ab/cache-api-cleanup" (that topic itself being based on a too-old "master"). Since the v2 I changed the "Complete the double-reference" logic in repo_read_index() so that we're not working around a state of a affairs that no longer exists with this change. A. https://lore.kernel.org/git/cover-v2-0.6-00000000000-20230112T124842Z-avarab@gmail.com/ B. https://lore.kernel.org/git/xmqqtu0u2q9u.fsf@gitster.g/ Range-diff: 1: 291233b0420 ! 1: b4998652822 treewide: always have a valid "index_state.repo" member @@ Commit message code in [2]. We can now simply use "istate->repo". We're doing this by making use of the INDEX_STATE_INIT() macro (and - corresponding function) added in the preceding commit, which now have - mandatory "repo" arguments. As seen here there are cases where we set - it to NULL, but only if we're about to fill in the correct non-NULL - "repo" right afterwards. + corresponding function) added in [3], which now have mandatory "repo" + arguments. + + Because we now call index_state_init() in repository.c's + initialize_the_repository() we don't need to handle the case where we + have a "repo->index" whose "repo" member doesn't match the "repo" + we're setting up, i.e. the "Complete the double-reference" code in + repo_read_index() being altered here. That logic was originally added + in [1], and was working around the lack of what we now have in + initialize_the_repository(). For "fsmonitor-settings.c" we can remove the initialization of a NULL - "r" argument to "the_repository". This was added back in [3], and was + "r" argument to "the_repository". This was added back in [4], and was needed at the time for callers that would pass us the "r" from an "istate->repo". Before this change such a change to "fsmonitor-settings.c" would segfault all over the test suite (e.g. in @@ Commit message 2021-01-23) 2. ee1f0c242ef (read-cache: add index.skipHash config option, 2023-01-06) - 3. 1e0ea5c4316 (fsmonitor: config settings are repository-specific, + 3. 2f6b1eb794e (cache API: add a "INDEX_STATE_INIT" macro/function, + add release_index(), 2023-01-12) + 4. 1e0ea5c4316 (fsmonitor: config settings are repository-specific, 2022-03-25) Signed-off-by: Ævar Arnfjörð Bjarmason @@ repository.c: void initialize_the_repository(void) } @@ repository.c: int repo_read_index(struct repository *repo) + { + int res; ++ /* Complete the double-reference */ if (!repo->index) { ALLOC_ARRAY(repo->index, 1); - index_state_init(repo->index); -+ index_state_init(repo->index, NULL /* set below */); - } +- } +- +- /* Complete the double-reference */ +- if (!repo->index->repo) +- repo->index->repo = repo; +- else if (repo->index->repo != repo) ++ index_state_init(repo->index, repo); ++ } else if (repo->index->repo != repo) { + BUG("repo's index should point back at itself"); ++ } + + res = read_index_from(repo->index, repo->index_file, repo->gitdir); - /* Complete the double-reference */ ## revision.c ## @@ revision.c: void add_index_objects_to_pending(struct rev_info *revs, unsigned int flags) apply.c | 2 +- builtin/difftool.c | 2 +- builtin/sparse-checkout.c | 2 +- builtin/stash.c | 8 ++++---- builtin/worktree.c | 2 +- cache.h | 9 ++++++--- fsmonitor-settings.c | 14 -------------- fsmonitor.c | 2 +- merge-recursive.c | 2 +- read-cache.c | 17 +++++------------ repository.c | 13 ++++++------- revision.c | 2 +- sparse-index.c | 9 --------- split-index.c | 2 +- unpack-trees.c | 2 +- 15 files changed, 30 insertions(+), 58 deletions(-) diff --git a/apply.c b/apply.c index 821fe411ec8..5eec433583e 100644 --- a/apply.c +++ b/apply.c @@ -4105,7 +4105,7 @@ static int preimage_oid_in_gitlink_patch(struct patch *p, struct object_id *oid) static int build_fake_ancestor(struct apply_state *state, struct patch *list) { struct patch *patch; - struct index_state result = INDEX_STATE_INIT; + struct index_state result = INDEX_STATE_INIT(state->repo); struct lock_file lock = LOCK_INIT; int res; diff --git a/builtin/difftool.c b/builtin/difftool.c index 758e7bd3b6a..dbbfb19f192 100644 --- a/builtin/difftool.c +++ b/builtin/difftool.c @@ -361,7 +361,7 @@ static int run_dir_diff(const char *extcmd, int symlinks, const char *prefix, struct hashmap symlinks2 = HASHMAP_INIT(pair_cmp, NULL); struct hashmap_iter iter; struct pair_entry *entry; - struct index_state wtindex = INDEX_STATE_INIT; + struct index_state wtindex = INDEX_STATE_INIT(the_repository); struct checkout lstate, rstate; int err = 0; struct child_process cmd = CHILD_PROCESS_INIT; diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c index dc332c6d05f..c3738154918 100644 --- a/builtin/sparse-checkout.c +++ b/builtin/sparse-checkout.c @@ -217,7 +217,7 @@ static int update_working_directory(struct pattern_list *pl) o.head_idx = -1; o.src_index = r->index; o.dst_index = r->index; - index_state_init(&o.result); + index_state_init(&o.result, r); o.skip_sparse_checkout = 0; o.pl = pl; diff --git a/builtin/stash.c b/builtin/stash.c index a5f13fb1e9f..839569a9803 100644 --- a/builtin/stash.c +++ b/builtin/stash.c @@ -1137,7 +1137,7 @@ static int save_untracked_files(struct stash_info *info, struct strbuf *msg, int ret = 0; struct strbuf untracked_msg = STRBUF_INIT; struct child_process cp_upd_index = CHILD_PROCESS_INIT; - struct index_state istate = INDEX_STATE_INIT; + struct index_state istate = INDEX_STATE_INIT(the_repository); cp_upd_index.git_cmd = 1; strvec_pushl(&cp_upd_index.args, "update-index", "-z", "--add", @@ -1176,7 +1176,7 @@ static int stash_staged(struct stash_info *info, struct strbuf *out_patch, { int ret = 0; struct child_process cp_diff_tree = CHILD_PROCESS_INIT; - struct index_state istate = INDEX_STATE_INIT; + struct index_state istate = INDEX_STATE_INIT(the_repository); if (write_index_as_tree(&info->w_tree, &istate, the_repository->index_file, 0, NULL)) { @@ -1209,7 +1209,7 @@ static int stash_patch(struct stash_info *info, const struct pathspec *ps, int ret = 0; struct child_process cp_read_tree = CHILD_PROCESS_INIT; struct child_process cp_diff_tree = CHILD_PROCESS_INIT; - struct index_state istate = INDEX_STATE_INIT; + struct index_state istate = INDEX_STATE_INIT(the_repository); char *old_index_env = NULL, *old_repo_index_file; remove_path(stash_index_path.buf); @@ -1271,7 +1271,7 @@ static int stash_working_tree(struct stash_info *info, const struct pathspec *ps struct rev_info rev; struct child_process cp_upd_index = CHILD_PROCESS_INIT; struct strbuf diff_output = STRBUF_INIT; - struct index_state istate = INDEX_STATE_INIT; + struct index_state istate = INDEX_STATE_INIT(the_repository); init_revisions(&rev, NULL); copy_pathspec(&rev.prune_data, ps); diff --git a/builtin/worktree.c b/builtin/worktree.c index 311d6e90750..f51c40f1e1e 100644 --- a/builtin/worktree.c +++ b/builtin/worktree.c @@ -923,7 +923,7 @@ static int unlock_worktree(int ac, const char **av, const char *prefix) static void validate_no_submodules(const struct worktree *wt) { - struct index_state istate = INDEX_STATE_INIT; + struct index_state istate = INDEX_STATE_INIT(the_repository); struct strbuf path = STRBUF_INIT; int i, found_submodules = 0; diff --git a/cache.h b/cache.h index be28fce12ac..4bf14e0bd94 100644 --- a/cache.h +++ b/cache.h @@ -367,10 +367,13 @@ struct index_state { * If the variable won't be used again, use release_index() to free() * its resources. If it needs to be used again use discard_index(), * which does the same thing, but will use use index_state_init() at - * the end. + * the end. The discard_index() will use its own "istate->repo" as the + * "r" argument to index_state_init() in that case. */ -#define INDEX_STATE_INIT { 0 } -void index_state_init(struct index_state *istate); +#define INDEX_STATE_INIT(r) { \ + .repo = (r), \ +} +void index_state_init(struct index_state *istate, struct repository *r); void release_index(struct index_state *istate); /* Name hashing */ diff --git a/fsmonitor-settings.c b/fsmonitor-settings.c index ee63a97dc51..899bfe9c813 100644 --- a/fsmonitor-settings.c +++ b/fsmonitor-settings.c @@ -143,8 +143,6 @@ static void lookup_fsmonitor_settings(struct repository *r) enum fsmonitor_mode fsm_settings__get_mode(struct repository *r) { - if (!r) - r = the_repository; if (!r->settings.fsmonitor) lookup_fsmonitor_settings(r); @@ -153,8 +151,6 @@ enum fsmonitor_mode fsm_settings__get_mode(struct repository *r) const char *fsm_settings__get_hook_path(struct repository *r) { - if (!r) - r = the_repository; if (!r->settings.fsmonitor) lookup_fsmonitor_settings(r); @@ -174,8 +170,6 @@ void fsm_settings__set_ipc(struct repository *r) * Caller requested IPC explicitly, so avoid (possibly * recursive) config lookup. */ - if (!r) - r = the_repository; if (!r->settings.fsmonitor) r->settings.fsmonitor = alloc_settings(); @@ -197,8 +191,6 @@ void fsm_settings__set_hook(struct repository *r, const char *path) * Caller requested hook explicitly, so avoid (possibly * recursive) config lookup. */ - if (!r) - r = the_repository; if (!r->settings.fsmonitor) r->settings.fsmonitor = alloc_settings(); @@ -210,8 +202,6 @@ void fsm_settings__set_hook(struct repository *r, const char *path) void fsm_settings__set_disabled(struct repository *r) { - if (!r) - r = the_repository; if (!r->settings.fsmonitor) r->settings.fsmonitor = alloc_settings(); @@ -223,8 +213,6 @@ void fsm_settings__set_disabled(struct repository *r) void fsm_settings__set_incompatible(struct repository *r, enum fsmonitor_reason reason) { - if (!r) - r = the_repository; if (!r->settings.fsmonitor) r->settings.fsmonitor = alloc_settings(); @@ -235,8 +223,6 @@ void fsm_settings__set_incompatible(struct repository *r, enum fsmonitor_reason fsm_settings__get_reason(struct repository *r) { - if (!r) - r = the_repository; if (!r->settings.fsmonitor) lookup_fsmonitor_settings(r); diff --git a/fsmonitor.c b/fsmonitor.c index 08af00c7387..a5b9e75437b 100644 --- a/fsmonitor.c +++ b/fsmonitor.c @@ -304,7 +304,7 @@ void refresh_fsmonitor(struct index_state *istate) char *buf; unsigned int i; int is_trivial = 0; - struct repository *r = istate->repo ? istate->repo : the_repository; + struct repository *r = istate->repo; enum fsmonitor_mode fsm_mode = fsm_settings__get_mode(r); enum fsmonitor_reason reason = fsm_settings__get_reason(r); diff --git a/merge-recursive.c b/merge-recursive.c index 0948b3ea961..ae469f8cc81 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -412,7 +412,7 @@ static int unpack_trees_start(struct merge_options *opt, { int rc; struct tree_desc t[3]; - struct index_state tmp_index = INDEX_STATE_INIT; + struct index_state tmp_index = INDEX_STATE_INIT(opt->repo); memset(&opt->priv->unpack_opts, 0, sizeof(opt->priv->unpack_opts)); if (opt->priv->call_depth) diff --git a/read-cache.c b/read-cache.c index d191741f600..7bd12afb38c 100644 --- a/read-cache.c +++ b/read-cache.c @@ -2300,8 +2300,6 @@ static void set_new_index_sparsity(struct index_state *istate) * If the index's repo exists, mark it sparse according to * repo settings. */ - if (!istate->repo) - return; prepare_repo_settings(istate->repo); if (!istate->repo->settings.command_requires_full_index && is_sparse_index_allowed(istate, 0)) @@ -2330,8 +2328,6 @@ int do_read_index(struct index_state *istate, const char *path, int must_exist) fd = open(path, O_RDONLY); if (fd < 0) { if (!must_exist && errno == ENOENT) { - if (!istate->repo) - istate->repo = the_repository; set_new_index_sparsity(istate); return 0; } @@ -2433,9 +2429,6 @@ int do_read_index(struct index_state *istate, const char *path, int must_exist) trace2_data_intmax("index", the_repository, "read/cache_nr", istate->cache_nr); - if (!istate->repo) - istate->repo = the_repository; - /* * If the command explicitly requires a full index, force it * to be full. Otherwise, correct the sparsity based on repository @@ -2501,7 +2494,7 @@ int read_index_from(struct index_state *istate, const char *path, release_index(split_index->base); else ALLOC_ARRAY(split_index->base, 1); - index_state_init(split_index->base); + index_state_init(split_index->base, istate->repo); base_oid_hex = oid_to_hex(&split_index->base_oid); base_path = xstrfmt("%s/sharedindex.%s", gitdir, base_oid_hex); @@ -2540,9 +2533,9 @@ int is_index_unborn(struct index_state *istate) return (!istate->cache_nr && !istate->timestamp.sec); } -void index_state_init(struct index_state *istate) +void index_state_init(struct index_state *istate, struct repository *r) { - struct index_state blank = INDEX_STATE_INIT; + struct index_state blank = INDEX_STATE_INIT(r); memcpy(istate, &blank, sizeof(*istate)); } @@ -2579,7 +2572,7 @@ void release_index(struct index_state *istate) void discard_index(struct index_state *istate) { release_index(istate); - index_state_init(istate); + index_state_init(istate, istate->repo); } /* @@ -2933,7 +2926,7 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile, int ieot_entries = 1; struct index_entry_offset_table *ieot = NULL; int nr, nr_threads; - struct repository *r = istate->repo ? istate->repo : the_repository; + struct repository *r = istate->repo; f = hashfd(tempfile->fd, tempfile->filename.buf); diff --git a/repository.c b/repository.c index a5805fa33b1..937fa974b38 100644 --- a/repository.c +++ b/repository.c @@ -28,6 +28,8 @@ void initialize_the_repository(void) the_repo.remote_state = remote_state_new(); the_repo.parsed_objects = parsed_object_pool_new(); + index_state_init(&the_index, the_repository); + repo_set_hash_algo(&the_repo, GIT_HASH_SHA1); } @@ -302,16 +304,13 @@ int repo_read_index(struct repository *repo) { int res; + /* Complete the double-reference */ if (!repo->index) { ALLOC_ARRAY(repo->index, 1); - index_state_init(repo->index); - } - - /* Complete the double-reference */ - if (!repo->index->repo) - repo->index->repo = repo; - else if (repo->index->repo != repo) + index_state_init(repo->index, repo); + } else if (repo->index->repo != repo) { BUG("repo's index should point back at itself"); + } res = read_index_from(repo->index, repo->index_file, repo->gitdir); diff --git a/revision.c b/revision.c index fb090886f5b..21f5f572c22 100644 --- a/revision.c +++ b/revision.c @@ -1813,7 +1813,7 @@ void add_index_objects_to_pending(struct rev_info *revs, unsigned int flags) worktrees = get_worktrees(); for (p = worktrees; *p; p++) { struct worktree *wt = *p; - struct index_state istate = INDEX_STATE_INIT; + struct index_state istate = INDEX_STATE_INIT(revs->repo); if (wt->is_current) continue; /* current index already taken care of */ diff --git a/sparse-index.c b/sparse-index.c index 86e3b99870b..147a13386a4 100644 --- a/sparse-index.c +++ b/sparse-index.c @@ -128,9 +128,6 @@ int is_sparse_index_allowed(struct index_state *istate, int flags) if (!core_apply_sparse_checkout || !core_sparse_checkout_cone) return 0; - if (!istate->repo) - istate->repo = the_repository; - if (!(flags & SPARSE_INDEX_MEMORY_ONLY)) { int test_env; @@ -327,9 +324,6 @@ void expand_index(struct index_state *istate, struct pattern_list *pl) pl = NULL; } - if (!istate->repo) - istate->repo = the_repository; - /* * A NULL pattern set indicates we are expanding a full index, so * we use a special region name that indicates the full expansion. @@ -552,9 +546,6 @@ void expand_to_path(struct index_state *istate, if (!istate->sparse_index) return; - if (!istate->repo) - istate->repo = the_repository; - in_expand_to_path = 1; /* diff --git a/split-index.c b/split-index.c index a5b56c0c37f..5d0f04763ea 100644 --- a/split-index.c +++ b/split-index.c @@ -91,7 +91,7 @@ void move_cache_to_base_index(struct index_state *istate) } ALLOC_ARRAY(si->base, 1); - index_state_init(si->base); + index_state_init(si->base, istate->repo); si->base->version = istate->version; /* zero timestamp disables racy test in ce_write_index() */ si->base->timestamp = istate->timestamp; diff --git a/unpack-trees.c b/unpack-trees.c index d1d1b0f319e..3d05e45a279 100644 --- a/unpack-trees.c +++ b/unpack-trees.c @@ -1905,7 +1905,7 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options populate_from_existing_patterns(o, &pl); } - index_state_init(&o->result); + index_state_init(&o->result, o->src_index->repo); o->result.initialized = 1; o->result.timestamp.sec = o->src_index->timestamp.sec; o->result.timestamp.nsec = o->src_index->timestamp.nsec;