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2013-07-09Convert "struct cache_entry *" to "const ..." wherever possibleNguyễn Thái Ngọc Duy
I attempted to make index_state->cache[] a "const struct cache_entry **" to find out how existing entries in index are modified and where. The question I have is what do we do if we really need to keep track of on-disk changes in the index. The result is - diff-lib.c: setting CE_UPTODATE - name-hash.c: setting CE_HASHED - preload-index.c, read-cache.c, unpack-trees.c and builtin/update-index: obvious - entry.c: write_entry() may refresh the checked out entry via fill_stat_cache_info(). This causes "non-const struct cache_entry *" in builtin/apply.c, builtin/checkout-index.c and builtin/checkout.c - builtin/ls-files.c: --with-tree changes stagemask and may set CE_UPDATE Of these, write_entry() and its call sites are probably most interesting because it modifies on-disk info. But this is stat info and can be retrieved via refresh, at least for porcelain commands. Other just uses ce_flags for local purposes. So, keeping track of "dirty" entries is just a matter of setting a flag in index modification functions exposed by read-cache.c. Except unpack-trees, the rest of the code base does not do anything funny behind read-cache's back. The actual patch is less valueable than the summary above. But if anyone wants to re-identify the above sites. Applying this patch, then this: diff --git a/cache.h b/cache.h index 430d021..1692891 100644 --- a/cache.h +++ b/cache.h @@ -267,7 +267,7 @@ static inline unsigned int canon_mode(unsigned int mode) #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) struct index_state { - struct cache_entry **cache; + const struct cache_entry **cache; unsigned int version; unsigned int cache_nr, cache_alloc, cache_changed; struct string_list *resolve_undo; will help quickly identify them without bogus warnings. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-06add.c: extract new die_if_path_beyond_symlink() for reuseAdam Spiers
This will be reused by a new git check-ignore command. Also document validate_pathspec(). Signed-off-by: Adam Spiers <git@adamspiers.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-06add.c: extract check_path_for_gitlink() from treat_gitlinks() for reuseAdam Spiers
Extract the body of the for loop in treat_gitlinks() into a separate check_path_for_gitlink() function so that it can be reused elsewhere. This paves the way for a new check-ignore sub-command. Also document treat_gitlinks(). Signed-off-by: Adam Spiers <git@adamspiers.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-06pathspec.c: rename newly public functions for clarityAdam Spiers
Perform the following function renames to make it explicit that these pathspec handling functions are for matching against the index, rather than against a tree or the working directory. - fill_pathspec_matches() -> add_pathspec_matches_against_index() - find_used_pathspec() -> find_pathspecs_matching_against_index() Signed-off-by: Adam Spiers <git@adamspiers.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-06add.c: move pathspec matchers into new pathspec.c for reuseAdam Spiers
Extract the following functions from builtin/add.c to pathspec.c, in preparation for reuse by a new git check-ignore command: - fill_pathspec_matches() - find_used_pathspec() The functions being extracted are not changed in any way, except removal of the 'static' qualifier. Also add comments documenting these newly public functions, including clarifications that they operate on the index. Signed-off-by: Adam Spiers <git@adamspiers.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>