This is based on ds/cache-tree-basics. Here are a few more cleanups that are vaguely related to the index. I discovered these while preparing my sparse-index RFC that I intend to send early next week. The biggest patch is the final one, which creates a test script for comparing sparse-checkouts to full checkouts. There are some commands that do not behave similarly. This script will be the backbone of my testing strategy for the sparse-index by adding a new mode to compare sparse-checkouts with the two index types (full and sparse). UPDATES IN V3 ============= * Callers to cache_tree_update() no longer initialize the cache_tree in advance. * Added a patch to update verify_cache() prototype. * Added missing "pos + 1" in fsmonitor.c. * Added a BUG() statement when repo->istate->repo is already populated, but not equal to repo. * Cleaned up test_region pattern quoting. Thanks, Junio! Thanks, -Stolee Derrick Stolee (9): cache-tree: clean up cache_tree_update() cache-tree: simplify verify_cache() prototype cache-tree: extract subtree_pos() fsmonitor: de-duplicate BUG()s around dirty bits repository: add repo reference to index_state name-hash: use trace2 regions for init sparse-checkout: load sparse-checkout patterns test-lib: test_region looks for trace2 regions t1092: test interesting sparse-checkout scenarios builtin/checkout.c | 3 - builtin/sparse-checkout.c | 5 - cache-tree.c | 38 +-- cache-tree.h | 2 + cache.h | 1 + dir.c | 17 ++ dir.h | 2 + fsmonitor.c | 27 +- name-hash.c | 3 + repository.c | 6 + sequencer.c | 3 - t/t0500-progress-display.sh | 3 +- t/t1092-sparse-checkout-compatibility.sh | 301 +++++++++++++++++++++++ t/test-lib-functions.sh | 42 ++++ unpack-trees.c | 8 +- 15 files changed, 408 insertions(+), 53 deletions(-) create mode 100755 t/t1092-sparse-checkout-compatibility.sh base-commit: a4b6d202caad83c6dc29abe9b17e53a1b3fb54a0 Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-839%2Fderrickstolee%2Fmore-index-cleanups-v3 Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-839/derrickstolee/more-index-cleanups-v3 Pull-Request: https://github.com/gitgitgadget/git/pull/839 Range-diff vs v2: 1: f9dccaed0ac ! 1: bdc8ecca3d2 cache-tree: clean up cache_tree_update() @@ Commit message BUG() statement or returning with an error because future callers will want to populate an empty cache-tree using this method. - Also drop local variables that are used exactly once and can be found - directly from the 'istate' parameter. + Callers can also remove their conditional allocations of cache_tree. + + Also drop local variables that can be found directly from the 'istate' + parameter. Signed-off-by: Derrick Stolee <dstolee@xxxxxxxxxxxxx> + ## builtin/checkout.c ## +@@ builtin/checkout.c: static int merge_working_tree(const struct checkout_opts *opts, + } + } + +- if (!active_cache_tree) +- active_cache_tree = cache_tree(); +- + if (!cache_tree_fully_valid(active_cache_tree)) + cache_tree_update(&the_index, WRITE_TREE_SILENT | WRITE_TREE_REPAIR); + + ## cache-tree.c ## @@ cache-tree.c: static int update_one(struct cache_tree *it, @@ cache-tree.c: static int update_one(struct cache_tree *it, trace2_region_leave("cache_tree", "update", the_repository); trace_performance_leave("cache_tree_update"); if (i < 0) +@@ cache-tree.c: static int write_index_as_tree_internal(struct object_id *oid, + cache_tree_valid = 0; + } + +- if (!index_state->cache_tree) +- index_state->cache_tree = cache_tree(); +- + if (!cache_tree_valid && cache_tree_update(index_state, flags) < 0) + return WRITE_TREE_UNMERGED_INDEX; + + + ## sequencer.c ## +@@ sequencer.c: static int do_recursive_merge(struct repository *r, + + static struct object_id *get_cache_tree_oid(struct index_state *istate) + { +- if (!istate->cache_tree) +- istate->cache_tree = cache_tree(); +- + if (!cache_tree_fully_valid(istate->cache_tree)) + if (cache_tree_update(istate, 0)) { + error(_("unable to update cache tree")); + + ## unpack-trees.c ## +@@ unpack-trees.c: int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options + if (!ret) { + if (git_env_bool("GIT_TEST_CHECK_CACHE_TREE", 0)) + cache_tree_verify(the_repository, &o->result); +- if (!o->result.cache_tree) +- o->result.cache_tree = cache_tree(); + if (!cache_tree_fully_valid(o->result.cache_tree)) + cache_tree_update(&o->result, + WRITE_TREE_SILENT | -: ----------- > 2: 1b8b5680094 cache-tree: simplify verify_cache() prototype 2: 84323e04d08 = 3: 314b6b34f75 cache-tree: extract subtree_pos() 3: 31095f9aa0e ! 4: 4e688d25f8c fsmonitor: de-duplicate BUG()s around dirty bits @@ Commit message cannot simplify it too much. However, the error string is identical in each, so this simplifies things. + Be sure to add one when checking if a position if valid, since the + minimum is a bound on the expected size. + The end result is that the code is simpler to read while also preserving these assertions for developers in the FSMonitor space. @@ fsmonitor.c - if (pos >= istate->cache_nr) - BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" >= %u)", - (uintmax_t)pos, istate->cache_nr); -+ assert_index_minimum(istate, pos); ++ assert_index_minimum(istate, pos + 1); ce = istate->cache[pos]; ce->ce_flags &= ~CE_FSMONITOR_VALID; 4: a0d89d7a973 ! 5: 6373997e05c repository: add repo reference to index_state @@ Commit message repository, add a 'repo' pointer to struct index_state that allows access to this repository. + Add a BUG() statement if the repo already has an index, and the index + already has a repo, but somehow the index points to a different repo. + This will prevent future changes from needing to pass an additional 'struct repository *repo' parameter and instead rely only on the 'struct index_state *istate' parameter. @@ repository.c: int repo_read_index(struct repository *repo) + /* Complete the double-reference */ + if (!repo->index->repo) + repo->index->repo = repo; ++ else if (repo->index->repo != repo) ++ BUG("repo's index should point back at itself"); + return read_index_from(repo->index, repo->index_file, repo->gitdir); } 5: bc092f5c703 = 6: 9b545d7dbec name-hash: use trace2 regions for init 6: 04d1daf7222 = 7: 554cc7647e6 sparse-checkout: load sparse-checkout patterns 7: 8832ce84623 ! 8: b37181bdec4 test-lib: test_region looks for trace2 regions @@ t/test-lib-functions.sh: test_subcommand () { + shift + fi + -+ grep -e "\"region_enter\".*\"category\":\"$1\",\"label\":\"$2\"" "$3" ++ grep -e '"region_enter".*"category":"'"$1"'","label":"'"$2"\" "$3" + exitcode=$? + -+ if test $exitcode != $expect_exit ++ if test $exitcode != $expect_exit = 1] + then + return 1 + fi + -+ grep -e "\"region_leave\".*\"category\":\"$1\",\"label\":\"$2\"" "$3" ++ grep -e '"region_leave".*"category":"'"$1"'","label":"'"$2"\" "$3" + exitcode=$? + -+ if test $exitcode != $expect_exit ++ if test $exitcode != $expect_exit = 1] + then + return 1 + fi ++ ++ return 0 +} 8: 984458007ed ! 9: 72f925353d3 t1092: test interesting sparse-checkout scenarios @@ t/t1092-sparse-checkout-compatibility.sh (new) + echo a >a && + echo "after deep" >e && + echo "after folder1" >g && ++ echo "after x" >z && + mkdir folder1 folder2 deep x && + mkdir deep/deeper1 deep/deeper2 && + mkdir deep/deeper1/deepest && @@ t/t1092-sparse-checkout-compatibility.sh (new) + echo "after deepest" >deep/deeper1/e && + cp a folder1 && + cp a folder2 && ++ cp a x && + cp a deep && + cp a deep/deeper1 && + cp a deep/deeper2 && + cp a deep/deeper1/deepest && ++ cp -r deep/deeper1/deepest deep/deeper2 && + git add . && + git commit -m "initial commit" && + git checkout -b base && -- gitgitgadget
