[PATCH v4 12/24] cache-tree: share code between functions writing an index as a tree
- From
Elijah Newren <newren@gmail.com>
- Date
- Aug 17, 2019, 18:41 UTC
- Message-ID
- <20190817184144.32179-13-newren@gmail.com>
- In-Reply-To
- <20190817184144.32179-1-newren@gmail.com>
write_tree_from_memory() appeared to be a merge-recursive special that basically duplicated write_index_as_tree(). The two have a different signature, but the bigger difference was just that write_index_as_tree() would always unconditionally read the index off of disk instead of working on the current in-memory index. So:
* split out common code into write_index_as_tree_internal()
* rename write_tree_from_memory() to write_inmemory_index_as_tree(),
make it call write_index_as_tree_internal(), and move it to
cache-tree.cSigned-off-by: Elijah Newren <newren@gmail.com> --- builtin/checkout.c | 2 +- cache-tree.c | 85 +++++++++++++++++++++++++++++++++------------- cache-tree.h | 3 +- merge-recursive.c | 34 ++----------------- merge-recursive.h | 1 - 5 files changed, 67 insertions(+), 58 deletions(-)
diff --git a/builtin/checkout.c b/builtin/checkout.c index 90e0eaf25e..5e41fc1c01 100644 --- a/builtin/checkout.c +++ b/builtin/checkout.c @@ -760,7 +760,7 @@ static int merge_working_tree(const struct checkout_opts *opts, */ init_merge_options(&o, the_repository); o.verbosity = 0; - work = write_tree_from_memory(&o); + work = write_in_core_index_as_tree(the_repository); ret = reset_tree(new_tree, opts, 1, diff --git a/cache-tree.c b/cache-tree.c index 706ffcf188..fbb5252521 100644 --- a/cache-tree.c +++ b/cache-tree.c @@ -608,11 +608,66 @@ static struct cache_tree *cache_tree_find(struct cache_tree *it, const char *pat return it; } +static int write_index_as_tree_internal(struct object_id *oid, + struct index_state *index_state, + int cache_tree_valid, + int flags, + const char *prefix) +{ + if (flags & WRITE_TREE_IGNORE_CACHE_TREE) { + cache_tree_free(&index_state->cache_tree); + 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; + + if (prefix) { + struct cache_tree *subtree; + subtree = cache_tree_find(index_state->cache_tree, prefix); + if (!subtree) + return WRITE_TREE_PREFIX_ERROR; + oidcpy(oid, &subtree->oid); + } + else + oidcpy(oid, &index_state->cache_tree->oid); + + return 0; +} + +struct tree* write_in_core_index_as_tree(struct repository *repo) { + struct object_id o; + int was_valid, ret; + + struct index_state *index_state = repo->index; + was_valid = index_state->cache_tree && + cache_tree_fully_valid(index_state->cache_tree); + + ret = write_index_as_tree_internal(&o, index_state, was_valid, 0, NULL); + if (ret == WRITE_TREE_UNMERGED_INDEX) { + int i; + fprintf(stderr, "BUG: There are unmerged index entries:\n"); + for (i = 0; i < index_state->cache_nr; i++) { + const struct cache_entry *ce = index_state->cache[i]; + if (ce_stage(ce)) + fprintf(stderr, "BUG: %d %.*s\n", ce_stage(ce), + (int)ce_namelen(ce), ce->name); + } + BUG("unmerged index entries when writing inmemory index"); + } + + return lookup_tree(repo, &index_state->cache_tree->oid); +} + + int write_index_as_tree(struct object_id *oid, struct index_state *index_state, const char *index_path, int flags, const char *prefix) { int entries, was_valid; struct lock_file lock_file = LOCK_INIT; - int ret = 0; + int ret; hold_lock_file_for_update(&lock_file, index_path, LOCK_DIE_ON_ERROR); @@ -621,18 +676,14 @@ int write_index_as_tree(struct object_id *oid, struct index_state *index_state, ret = WRITE_TREE_UNREADABLE_INDEX; goto out; } - if (flags & WRITE_TREE_IGNORE_CACHE_TREE) - cache_tree_free(&index_state->cache_tree); - if (!index_state->cache_tree) - index_state->cache_tree = cache_tree(); + was_valid = !(flags & WRITE_TREE_IGNORE_CACHE_TREE) && + index_state->cache_tree && + cache_tree_fully_valid(index_state->cache_tree); - was_valid = cache_tree_fully_valid(index_state->cache_tree); - if (!was_valid) { - if (cache_tree_update(index_state, flags) < 0) { - ret = WRITE_TREE_UNMERGED_INDEX; - goto out; - } + ret = write_index_as_tree_internal(oid, index_state, was_valid, flags, + prefix); + if (!ret && !was_valid) { write_locked_index(index_state, &lock_file, COMMIT_LOCK); /* Not being able to write is fine -- we are only interested * in updating the cache-tree part, and if the next caller @@ -642,18 +693,6 @@ int write_index_as_tree(struct object_id *oid, struct index_state *index_state, */ } - if (prefix) { - struct cache_tree *subtree; - subtree = cache_tree_find(index_state->cache_tree, prefix); - if (!subtree) { - ret = WRITE_TREE_PREFIX_ERROR; - goto out; - } - oidcpy(oid, &subtree->oid); - } - else - oidcpy(oid, &index_state->cache_tree->oid); - out: rollback_lock_file(&lock_file); return ret; diff --git a/cache-tree.h b/cache-tree.h index 757bbc48bc..639bfa5340 100644 --- a/cache-tree.h +++ b/cache-tree.h @@ -34,7 +34,7 @@ int cache_tree_fully_valid(struct cache_tree *); int cache_tree_update(struct index_state *, int); void cache_tree_verify(struct repository *, struct index_state *); -/* bitmasks to write_cache_as_tree flags */ +/* bitmasks to write_index_as_tree flags */ #define WRITE_TREE_MISSING_OK 1 #define WRITE_TREE_IGNORE_CACHE_TREE 2 #define WRITE_TREE_DRY_RUN 4 @@ -46,6 +46,7 @@ void cache_tree_verify(struct repository *, struct index_state *); #define WRITE_TREE_UNMERGED_INDEX (-2) #define WRITE_TREE_PREFIX_ERROR (-3) +struct tree* write_in_core_index_as_tree(struct repository *repo); int write_index_as_tree(struct object_id *oid, struct index_state *index_state, const char *index_path, int flags, const char *prefix); void prime_cache_tree(struct repository *, struct index_state *, struct tree *); diff --git a/merge-recursive.c b/merge-recursive.c index fda67dd371..ae509357f7 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -412,37 +412,6 @@ static void unpack_trees_finish(struct merge_options *opt) clear_unpack_trees_porcelain(&opt->unpack_opts); } -struct tree *write_tree_from_memory(struct merge_options *opt) -{ - struct tree *result = NULL; - struct index_state *istate = opt->repo->index; - - if (unmerged_index(istate)) { - int i; - fprintf(stderr, "BUG: There are unmerged index entries:\n"); - for (i = 0; i < istate->cache_nr; i++) { - const struct cache_entry *ce = istate->cache[i]; - if (ce_stage(ce)) - fprintf(stderr, "BUG: %d %.*s\n", ce_stage(ce), - (int)ce_namelen(ce), ce->name); - } - BUG("unmerged index entries in merge-recursive.c"); - } - - if (!istate->cache_tree) - istate->cache_tree = cache_tree(); - - if (!cache_tree_fully_valid(istate->cache_tree) && - cache_tree_update(istate, 0) < 0) { - err(opt, _("error building trees")); - return NULL; - } - - result = lookup_tree(opt->repo, &istate->cache_tree->oid); - - return result; -} - static int save_files_dirs(const struct object_id *oid, struct strbuf *base, const char *path, unsigned int mode, int stage, void *context) @@ -3472,7 +3441,8 @@ static int merge_trees_internal(struct merge_options *opt, unpack_trees_finish(opt); - if (opt->call_depth && !(*result = write_tree_from_memory(opt))) + if (opt->call_depth && + !(*result = write_in_core_index_as_tree(opt->repo))) return -1; return clean; diff --git a/merge-recursive.h b/merge-recursive.h index 18012fff9d..0a3033bdb0 100644 --- a/merge-recursive.h +++ b/merge-recursive.h @@ -113,7 +113,6 @@ int merge_recursive_generic(struct merge_options *o, void init_merge_options(struct merge_options *o, struct repository *repo); -struct tree *write_tree_from_memory(struct merge_options *o); int parse_merge_opt(struct merge_options *out, const char *s);
-- 2.23.0.rc2.28.g5f89f15d7b.dirty