diff options
| -rw-r--r-- | Documentation/git-read-tree.txt | 7 | ||||
| -rw-r--r-- | cache.h | 26 | ||||
| -rw-r--r-- | dir.c | 19 | ||||
| -rw-r--r-- | dir.h | 1 | ||||
| -rwxr-xr-x | t/t1011-read-tree-sparse-checkout.sh | 14 | ||||
| -rw-r--r-- | unpack-trees.c | 240 |
6 files changed, 254 insertions, 53 deletions
diff --git a/Documentation/git-read-tree.txt b/Documentation/git-read-tree.txt index e88e9c2d5..634423a69 100644 --- a/Documentation/git-read-tree.txt +++ b/Documentation/git-read-tree.txt @@ -416,13 +416,6 @@ turn `core.sparseCheckout` on in order to have sparse checkout support. -BUGS ----- -In order to match a directory with $GIT_DIR/info/sparse-checkout, -trailing slash must be used. The form without trailing slash, while -works with .gitignore, does not work with sparse checkout. - - SEE ALSO -------- linkgit:git-write-tree[1]; linkgit:git-ls-files[1]; @@ -170,26 +170,26 @@ struct cache_entry { * * In-memory only flags */ -#define CE_UPDATE (0x10000) -#define CE_REMOVE (0x20000) -#define CE_UPTODATE (0x40000) -#define CE_ADDED (0x80000) +#define CE_UPDATE (1 << 16) +#define CE_REMOVE (1 << 17) +#define CE_UPTODATE (1 << 18) +#define CE_ADDED (1 << 19) -#define CE_HASHED (0x100000) -#define CE_UNHASHED (0x200000) -#define CE_CONFLICTED (0x800000) +#define CE_HASHED (1 << 20) +#define CE_UNHASHED (1 << 21) +#define CE_WT_REMOVE (1 << 22) /* remove in work directory */ +#define CE_CONFLICTED (1 << 23) -#define CE_WT_REMOVE (0x400000) /* remove in work directory */ - -#define CE_UNPACKED (0x1000000) +#define CE_UNPACKED (1 << 24) +#define CE_NEW_SKIP_WORKTREE (1 << 25) /* * Extended on-disk flags */ -#define CE_INTENT_TO_ADD 0x20000000 -#define CE_SKIP_WORKTREE 0x40000000 +#define CE_INTENT_TO_ADD (1 << 29) +#define CE_SKIP_WORKTREE (1 << 30) /* CE_EXTENDED2 is for future extension */ -#define CE_EXTENDED2 0x80000000 +#define CE_EXTENDED2 (1 << 31) #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) @@ -253,6 +253,18 @@ static void *read_skip_worktree_file_from_index(const char *path, size_t *size) return data; } +void free_excludes(struct exclude_list *el) +{ + int i; + + for (i = 0; i < el->nr; i++) + free(el->excludes[i]); + free(el->excludes); + + el->nr = 0; + el->excludes = NULL; +} + int add_excludes_from_file_to_list(const char *fname, const char *base, int baselen, @@ -389,13 +401,6 @@ int excluded_from_list(const char *pathname, int to_exclude = x->to_exclude; if (x->flags & EXC_FLAG_MUSTBEDIR) { - if (!dtype) { - if (!prefixcmp(pathname, exclude) && - pathname[x->patternlen] == '/') - return to_exclude; - else - continue; - } if (*dtype == DT_UNKNOWN) *dtype = get_dtype(NULL, pathname, pathlen); if (*dtype != DT_DIR) @@ -78,6 +78,7 @@ extern int add_excludes_from_file_to_list(const char *fname, const char *base, i extern void add_excludes_from_file(struct dir_struct *, const char *fname); extern void add_exclude(const char *string, const char *base, int baselen, struct exclude_list *which); +extern void free_excludes(struct exclude_list *el); extern int file_exists(const char *); extern char *get_relative_cwd(char *buffer, int size, const char *dir); diff --git a/t/t1011-read-tree-sparse-checkout.sh b/t/t1011-read-tree-sparse-checkout.sh index 0ef11bccb..de84e35c4 100755 --- a/t/t1011-read-tree-sparse-checkout.sh +++ b/t/t1011-read-tree-sparse-checkout.sh @@ -94,12 +94,20 @@ test_expect_success 'match directories with trailing slash' ' test -f sub/added ' -test_expect_failure 'match directories without trailing slash' ' - echo init.t >.git/info/sparse-checkout && +test_expect_success 'match directories without trailing slash' ' echo sub >>.git/info/sparse-checkout && git read-tree -m -u HEAD && git ls-files -t >result && - test_cmp expected.swt result && + test_cmp expected.swt-noinit result && + test ! -f init.t && + test -f sub/added +' + +test_expect_success 'match directory pattern' ' + echo "s?b" >>.git/info/sparse-checkout && + git read-tree -m -u HEAD && + git ls-files -t >result && + test_cmp expected.swt-noinit result && test ! -f init.t && test -f sub/added ' diff --git a/unpack-trees.c b/unpack-trees.c index d5a453079..1ca41b1a6 100644 --- a/unpack-trees.c +++ b/unpack-trees.c @@ -231,20 +231,11 @@ static int check_updates(struct unpack_trees_options *o) static int verify_uptodate_sparse(struct cache_entry *ce, struct unpack_trees_options *o); static int verify_absent_sparse(struct cache_entry *ce, enum unpack_trees_error_types, struct unpack_trees_options *o); -static int will_have_skip_worktree(const struct cache_entry *ce, struct unpack_trees_options *o) -{ - const char *basename; - - basename = strrchr(ce->name, '/'); - basename = basename ? basename+1 : ce->name; - return excluded_from_list(ce->name, ce_namelen(ce), basename, NULL, o->el) <= 0; -} - static int apply_sparse_checkout(struct cache_entry *ce, struct unpack_trees_options *o) { int was_skip_worktree = ce_skip_worktree(ce); - if (!ce_stage(ce) && will_have_skip_worktree(ce, o)) + if (ce->ce_flags & CE_NEW_SKIP_WORKTREE) ce->ce_flags |= CE_SKIP_WORKTREE; else ce->ce_flags &= ~CE_SKIP_WORKTREE; @@ -319,7 +310,7 @@ static void mark_all_ce_unused(struct index_state *index) { int i; for (i = 0; i < index->cache_nr; i++) - index->cache[i]->ce_flags &= ~CE_UNPACKED; + index->cache[i]->ce_flags &= ~(CE_UNPACKED | CE_ADDED | CE_NEW_SKIP_WORKTREE); } static int locate_in_src_index(struct cache_entry *ce, @@ -820,9 +811,177 @@ static int unpack_callback(int n, unsigned long mask, unsigned long dirmask, str return mask; } +/* Whole directory matching */ +static int clear_ce_flags_dir(struct cache_entry **cache, int nr, + char *prefix, int prefix_len, + char *basename, + int select_mask, int clear_mask, + struct exclude_list *el) +{ + struct cache_entry **cache_end = cache + nr; + int dtype = DT_DIR; + int ret = excluded_from_list(prefix, prefix_len, basename, &dtype, el); + + prefix[prefix_len++] = '/'; + + /* included, no clearing for any entries under this directory */ + if (!ret) { + for (; cache != cache_end; cache++) { + struct cache_entry *ce = *cache; + if (strncmp(ce->name, prefix, prefix_len)) + break; + } + return nr - (cache_end - cache); + } + + /* excluded, clear all selected entries under this directory. */ + if (ret == 1) { + for (; cache != cache_end; cache++) { + struct cache_entry *ce = *cache; + if (select_mask && !(ce->ce_flags & select_mask)) + continue; + if (strncmp(ce->name, prefix, prefix_len)) + break; + ce->ce_flags &= ~clear_mask; + } + return nr - (cache_end - cache); + } + + return 0; +} + +/* + * Traverse the index, find every entry that matches according to + * o->el. Do "ce_flags &= ~clear_mask" on those entries. Return the + * number of traversed entries. + * + * If select_mask is non-zero, only entries whose ce_flags has on of + * those bits enabled are traversed. + * + * cache : pointer to an index entry + * prefix_len : an offset to its path + * + * The current path ("prefix") including the trailing '/' is + * cache[0]->name[0..(prefix_len-1)] + * Top level path has prefix_len zero. + */ +static int clear_ce_flags_1(struct cache_entry **cache, int nr, + char *prefix, int prefix_len, + int select_mask, int clear_mask, + struct exclude_list *el) +{ + struct cache_entry **cache_end = cache + nr; + + /* + * Process all entries that have the given prefix and meet + * select_mask condition + */ + while(cache != cache_end) { + struct cache_entry *ce = *cache; + const char *name, *slash; + int len, dtype; + + if (select_mask && !(ce->ce_flags & select_mask)) { + cache++; + continue; + } + + if (prefix_len && strncmp(ce->name, prefix, prefix_len)) + break; + + name = ce->name + prefix_len; + slash = strchr(name, '/'); + + /* If it's a directory, try whole directory match first */ + if (slash) { + int processed; + + len = slash - name; + memcpy(prefix + prefix_len, name, len); + + /* + * terminate the string (no trailing slash), + * clear_c_f_dir needs it + */ + prefix[prefix_len + len] = '\0'; + processed = clear_ce_flags_dir(cache, cache_end - cache, + prefix, prefix_len + len, + prefix + prefix_len, + select_mask, clear_mask, + el); + + /* clear_c_f_dir eats a whole dir already? */ + if (processed) { + cache += processed; + continue; + } + + prefix[prefix_len + len++] = '/'; + cache += clear_ce_flags_1(cache, cache_end - cache, + prefix, prefix_len + len, + select_mask, clear_mask, el); + continue; + } + + /* Non-directory */ + dtype = ce_to_dtype(ce); + if (excluded_from_list(ce->name, ce_namelen(ce), name, &dtype, el) > 0) + ce->ce_flags &= ~clear_mask; + cache++; + } + return nr - (cache_end - cache); +} + +static int clear_ce_flags(struct cache_entry **cache, int nr, + int select_mask, int clear_mask, + struct exclude_list *el) +{ + char prefix[PATH_MAX]; + return clear_ce_flags_1(cache, nr, + prefix, 0, + select_mask, clear_mask, + el); +} + +/* + * Set/Clear CE_NEW_SKIP_WORKTREE according to $GIT_DIR/info/sparse-checkout + */ +static void mark_new_skip_worktree(struct exclude_list *el, + struct index_state *the_index, + int select_flag, int skip_wt_flag) +{ + int i; + + /* + * 1. Pretend the narrowest worktree: only unmerged entries + * are checked out + */ + for (i = 0; i < the_index->cache_nr; i++) { + struct cache_entry *ce = the_index->cache[i]; + + if (select_flag && !(ce->ce_flags & select_flag)) + continue; + + if (!ce_stage(ce)) + ce->ce_flags |= skip_wt_flag; + else + ce->ce_flags &= ~skip_wt_flag; + } + + /* + * 2. Widen worktree according to sparse-checkout file. + * Matched entries will have skip_wt_flag cleared (i.e. "in") + */ + clear_ce_flags(the_index->cache, the_index->cache_nr, + select_flag, skip_wt_flag, el); +} + +static int verify_absent(struct cache_entry *, enum unpack_trees_error_types, struct unpack_trees_options *); /* * N-way merge "len" trees. Returns 0 on success, -1 on failure to manipulate the * resulting index, -2 on failure to reflect the changes to the work tree. + * + * CE_ADDED, CE_UNPACKED and CE_NEW_SKIP_WORKTREE are used internally */ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o) { @@ -855,6 +1014,12 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options o->merge_size = len; mark_all_ce_unused(o->src_index); + /* + * Sparse checkout loop #1: set NEW_SKIP_WORKTREE on existing entries + */ + if (!o->skip_sparse_checkout) + mark_new_skip_worktree(o->el, o->src_index, 0, CE_NEW_SKIP_WORKTREE); + if (!dfc) dfc = xcalloc(1, cache_entry_size(0)); o->df_conflict_entry = dfc; @@ -908,9 +1073,29 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options if (!o->skip_sparse_checkout) { int empty_worktree = 1; - for (i = 0;i < o->result.cache_nr;i++) { + + /* + * Sparse checkout loop #2: set NEW_SKIP_WORKTREE on entries not in loop #1 + * If the will have NEW_SKIP_WORKTREE, also set CE_SKIP_WORKTREE + * so apply_sparse_checkout() won't attempt to remove it from worktree + */ + mark_new_skip_worktree(o->el, &o->result, CE_ADDED, CE_SKIP_WORKTREE | CE_NEW_SKIP_WORKTREE); + + for (i = 0; i < o->result.cache_nr; i++) { struct cache_entry *ce = o->result.cache[i]; + /* + * Entries marked with CE_ADDED in merged_entry() do not have + * verify_absent() check (the check is effectively disabled + * because CE_NEW_SKIP_WORKTREE is set unconditionally). + * + * Do the real check now because we have had + * correct CE_NEW_SKIP_WORKTREE + */ + if (ce->ce_flags & CE_ADDED && + verify_absent(ce, ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN, o)) + return -1; + if (apply_sparse_checkout(ce, o)) { ret = -1; goto done; @@ -931,11 +1116,7 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o->dst_index = o->result; done: - for (i = 0;i < el.nr;i++) - free(el.excludes[i]); - if (el.excludes) - free(el.excludes); - + free_excludes(&el); return ret; return_failed: @@ -1003,7 +1184,7 @@ static int verify_uptodate_1(struct cache_entry *ce, static int verify_uptodate(struct cache_entry *ce, struct unpack_trees_options *o) { - if (!o->skip_sparse_checkout && will_have_skip_worktree(ce, o)) + if (!o->skip_sparse_checkout && (ce->ce_flags & CE_NEW_SKIP_WORKTREE)) return 0; return verify_uptodate_1(ce, o, ERROR_NOT_UPTODATE_FILE); } @@ -1209,7 +1390,7 @@ static int verify_absent(struct cache_entry *ce, enum unpack_trees_error_types error_type, struct unpack_trees_options *o) { - if (!o->skip_sparse_checkout && will_have_skip_worktree(ce, o)) + if (!o->skip_sparse_checkout && (ce->ce_flags & CE_NEW_SKIP_WORKTREE)) return 0; return verify_absent_1(ce, error_type, o); } @@ -1231,10 +1412,23 @@ static int merged_entry(struct cache_entry *merge, struct cache_entry *old, int update = CE_UPDATE; if (!old) { + /* + * New index entries. In sparse checkout, the following + * verify_absent() will be delayed until after + * traverse_trees() finishes in unpack_trees(), then: + * + * - CE_NEW_SKIP_WORKTREE will be computed correctly + * - verify_absent() be called again, this time with + * correct CE_NEW_SKIP_WORKTREE + * + * verify_absent() call here does nothing in sparse + * checkout (i.e. o->skip_sparse_checkout == 0) + */ + update |= CE_ADDED; + merge->ce_flags |= CE_NEW_SKIP_WORKTREE; + if (verify_absent(merge, ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN, o)) return -1; - if (!o->skip_sparse_checkout && will_have_skip_worktree(merge, o)) - update |= CE_SKIP_WORKTREE; invalidate_ce_path(merge, o); } else if (!(old->ce_flags & CE_CONFLICTED)) { /* @@ -1250,8 +1444,8 @@ static int merged_entry(struct cache_entry *merge, struct cache_entry *old, } else { if (verify_uptodate(old, o)) return -1; - if (ce_skip_worktree(old)) - update |= CE_SKIP_WORKTREE; + /* Migrate old flags over */ + update |= old->ce_flags & (CE_SKIP_WORKTREE | CE_NEW_SKIP_WORKTREE); invalidate_ce_path(old, o); } } else { |