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2017-11-06Merge branch 'bc/object-id'Libravatar Junio C Hamano1-4/+4
Conversion from uchar[20] to struct object_id continues. * bc/object-id: (25 commits) refs/files-backend: convert static functions to object_id refs: convert read_raw_ref backends to struct object_id refs: convert peel_object to struct object_id refs: convert resolve_ref_unsafe to struct object_id worktree: convert struct worktree to object_id refs: convert resolve_gitlink_ref to struct object_id Convert remaining callers of resolve_gitlink_ref to object_id sha1_file: convert index_path and index_fd to struct object_id refs: convert reflog_expire parameter to struct object_id refs: convert read_ref_at to struct object_id refs: convert peel_ref to struct object_id builtin/pack-objects: convert to struct object_id pack-bitmap: convert traverse_bitmap_commit_list to object_id refs: convert dwim_log to struct object_id builtin/reflog: convert remaining unsigned char uses to object_id refs: convert dwim_ref and expand_ref to struct object_id refs: convert read_ref and read_ref_full to object_id refs: convert resolve_refdup and refs_resolve_refdup to struct object_id Convert check_connected to use struct object_id refs: update ref transactions to use struct object_id ...
2017-11-06Merge branch 'js/submodule-in-excluded'Libravatar Junio C Hamano1-1/+1
"git status --ignored -u" did not stop at a working tree of a separate project that is embedded in an ignored directory and listed files in that other project, instead of just showing the directory itself as ignored. * js/submodule-in-excluded: status: do not get confused by submodules in excluded directories
2017-10-26status: do not get confused by submodules in excluded directoriesLibravatar Johannes Schindelin1-1/+1
We meticulously pass the `exclude` flag to the `treat_directory()` function so that we can indicate that files in it are excluded rather than untracked when recursing. But we did not yet treat submodules the same way. Because of that, `git status --ignored --untracked` with a submodule `submodule` in a gitignored `tracked/` would show the submodule in the "Untracked files" section, e.g. On branch master Untracked files: (use "git add <file>..." to include in what will be committed) tracked/submodule/ Ignored files: (use "git add -f <file>..." to include in what will be committed) tracked/submodule/initial.t Instead, we would want it to show the submodule in the "Ignored files" section: On branch master Ignored files: (use "git add -f <file>..." to include in what will be committed) tracked/submodule/ Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-16refs: convert resolve_gitlink_ref to struct object_idLibravatar brian m. carlson1-2/+2
Convert the declaration and definition of resolve_gitlink_ref to use struct object_id and apply the following semantic patch: @@ expression E1, E2, E3; @@ - resolve_gitlink_ref(E1, E2, E3.hash) + resolve_gitlink_ref(E1, E2, &E3) @@ expression E1, E2, E3; @@ - resolve_gitlink_ref(E1, E2, E3->hash) + resolve_gitlink_ref(E1, E2, E3) Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-16Convert remaining callers of resolve_gitlink_ref to object_idLibravatar brian m. carlson1-4/+4
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-19Improve performance of git status --ignoredLibravatar Jameson Miller1-6/+41
Improve the performance of the directory listing logic when it wants to list non-empty ignored directories. In order to show non-empty ignored directories, the existing logic will recursively iterate through all contents of an ignored directory. This change introduces the optimization to stop iterating through the contents once it finds the first file. This can have a significant improvement in 'git status --ignored' performance in repositories with a large number of files in ignored directories. For an example of the performance difference on an example repository with 196,000 files in 400 ignored directories: | Command | Time (s) | | -------------------------- | --------- | | git status | 1.2 | | git status --ignored (old) | 3.9 | | git status --ignored (new) | 1.4 | Signed-off-by: Jameson Miller <jamill@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-08-23Merge branch 'rs/stat-data-unaligned-reads-fix' into maintLibravatar Junio C Hamano1-23/+27
Code clean-up. * rs/stat-data-unaligned-reads-fix: dir: support platforms that require aligned reads
2017-07-17dir: support platforms that require aligned readsLibravatar René Scharfe1-23/+27
The untracked cache is stored on disk by concatenating its memory structures without any padding. Consequently some of the structs are not aligned at a particular boundary when the whole extension is read back in one go. That's only OK on platforms without strict alignment requirements, or for byte-aligned data like strings or hash values. Decode struct ondisk_untracked_cache carefully from the extension blob by using explicit pointer arithmetic with offsets, avoiding alignment issues. Use char pointers for passing stat_data objects to stat_data_from_disk(), and use memcpy(3) in that function to get the contents into a properly aligned struct, then perform the byte-order adjustment in place there. Found with Clang's UBSan. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-07-10Merge branch 'ab/wildmatch'Libravatar Junio C Hamano1-5/+3
Minor code cleanup. * ab/wildmatch: wildmatch: remove unused wildopts parameter
2017-06-24Merge branch 'ab/free-and-null'Libravatar Junio C Hamano1-6/+3
A common pattern to free a piece of memory and assign NULL to the pointer that used to point at it has been replaced with a new FREE_AND_NULL() macro. * ab/free-and-null: *.[ch] refactoring: make use of the FREE_AND_NULL() macro coccinelle: make use of the "expression" FREE_AND_NULL() rule coccinelle: add a rule to make "expression" code use FREE_AND_NULL() coccinelle: make use of the "type" FREE_AND_NULL() rule coccinelle: add a rule to make "type" code use FREE_AND_NULL() git-compat-util: add a FREE_AND_NULL() wrapper around free(ptr); ptr = NULL
2017-06-24Merge branch 'bw/config-h'Libravatar Junio C Hamano1-0/+1
Fix configuration codepath to pay proper attention to commondir that is used in multi-worktree situation, and isolate config API into its own header file. * bw/config-h: config: don't implicitly use gitdir or commondir config: respect commondir setup: teach discover_git_directory to respect the commondir config: don't include config.h by default config: remove git_config_iter config: create config.h
2017-06-24Merge branch 'bw/ls-files-sans-the-index'Libravatar Junio C Hamano1-1/+1
Code clean-up. * bw/ls-files-sans-the-index: ls-files: factor out tag calculation ls-files: factor out debug info into a function ls-files: convert show_files to take an index ls-files: convert show_ce_entry to take an index ls-files: convert prune_cache to take an index ls-files: convert ce_excluded to take an index ls-files: convert show_ru_info to take an index ls-files: convert show_other_files to take an index ls-files: convert show_killed_files to take an index ls-files: convert write_eolinfo to take an index ls-files: convert overlay_tree_on_cache to take an index tree: convert read_tree to take an index parameter convert: convert renormalize_buffer to take an index convert: convert convert_to_git to take an index convert: convert convert_to_git_filter_fd to take an index convert: convert crlf_to_git to take an index convert: convert get_cached_convert_stats_ascii to take an index
2017-06-23wildmatch: remove unused wildopts parameterLibravatar Ævar Arnfjörð Bjarmason1-5/+3
Remove the unused wildopts placeholder struct from being passed to all wildmatch() invocations, or rather remove all the boilerplate NULL parameters. This parameter was added back in commit 9b3497cab9 ("wildmatch: rename constants and update prototype", 2013-01-01) as a placeholder for future use. Over 4 years later nothing has made use of it, let's just remove it. It can be added in the future if we find some reason to start using such a parameter. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-22Merge branch 'pc/dir-count-slashes'Libravatar Junio C Hamano1-0/+9
Three instances of the same helper function have been consolidated to one. * pc/dir-count-slashes: dir: create function count_slashes()
2017-06-16coccinelle: make use of the "type" FREE_AND_NULL() ruleLibravatar Ævar Arnfjörð Bjarmason1-6/+3
Apply the result of the just-added coccinelle rule. This manually excludes a few occurrences, mostly things that resulted in many FREE_AND_NULL() on one line, that'll be manually fixed in a subsequent change. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-15config: don't include config.h by defaultLibravatar Brandon Williams1-0/+1
Stop including config.h by default in cache.h. Instead only include config.h in those files which require use of the config system. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-13Merge branch 'nd/fopen-errors'Libravatar Junio C Hamano1-3/+3
We often try to open a file for reading whose existence is optional, and silently ignore errors from open/fopen; report such errors if they are not due to missing files. * nd/fopen-errors: mingw_fopen: report ENOENT for invalid file names mingw: verify that paths are not mistaken for remote nicknames log: fix memory leak in open_next_file() rerere.c: move error_errno() closer to the source system call print errno when reporting a system call error wrapper.c: make warn_on_inaccessible() static wrapper.c: add and use fopen_or_warn() wrapper.c: add and use warn_on_fopen_errors() config.mak.uname: set FREAD_READS_DIRECTORIES for Darwin, too config.mak.uname: set FREAD_READS_DIRECTORIES for Linux and FreeBSD clone: use xfopen() instead of fopen() use xfopen() in more places git_fopen: fix a sparse 'not declared' warning
2017-06-13Merge branch 'jc/noent-notdir'Libravatar Junio C Hamano1-1/+1
Our code often opens a path to an optional file, to work on its contents when we can successfully open it. We can ignore a failure to open if such an optional file does not exist, but we do want to report a failure in opening for other reasons (e.g. we got an I/O error, or the file is there, but we lack the permission to open). The exact errors we need to ignore are ENOENT (obviously) and ENOTDIR (less obvious). Instead of repeating comparison of errno with these two constants, introduce a helper function to do so. * jc/noent-notdir: treewide: use is_missing_file_error() where ENOENT and ENOTDIR are checked compat-util: is_missing_file_error()
2017-06-13Merge branch 'sl/clean-d-ignored-fix' into maintLibravatar Junio C Hamano1-4/+39
"git clean -d" used to clean directories that has ignored files, even though the command should not lose ignored ones without "-x". "git status --ignored" did not list ignored and untracked files without "-uall". These have been corrected. * sl/clean-d-ignored-fix: clean: teach clean -d to preserve ignored paths dir: expose cmp_name() and check_contains() dir: hide untracked contents of untracked dirs dir: recurse into untracked dirs for ignored files t7061: status --ignored should search untracked dirs t7300: clean -d should skip dirs with ignored files
2017-06-13convert: convert convert_to_git to take an indexLibravatar Brandon Williams1-1/+1
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-12dir: create function count_slashes()Libravatar Prathamesh Chavan1-0/+9
Similar functions exist in apply.c and builtin/show-branch.c for counting the number of slashes in a string. Also in the later patches, we introduce a third caller for the same. Hence, we unify it now by cleaning the existing functions and declaring a common function count_slashes in dir.h and implementing it in dir.c to remove this code duplication. Mentored-by: Christian Couder <christian.couder@gmail.com> Mentored-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Prathamesh Chavan <pc44800@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-02Merge branch 'sl/clean-d-ignored-fix'Libravatar Junio C Hamano1-4/+39
"git clean -d" used to clean directories that has ignored files, even though the command should not lose ignored ones without "-x". "git status --ignored" did not list ignored and untracked files without "-uall". These have been corrected. * sl/clean-d-ignored-fix: clean: teach clean -d to preserve ignored paths dir: expose cmp_name() and check_contains() dir: hide untracked contents of untracked dirs dir: recurse into untracked dirs for ignored files t7061: status --ignored should search untracked dirs t7300: clean -d should skip dirs with ignored files
2017-05-30treewide: use is_missing_file_error() where ENOENT and ENOTDIR are checkedLibravatar Junio C Hamano1-1/+1
Using the is_missing_file_error() helper introduced in the previous step, update all hits from $ git grep -e ENOENT --and -e ENOTDIR There are codepaths that only check ENOENT, and it is possible that some of them should be checking both. Updating them is kept out of this step deliberately, as we do not want to change behaviour in this step. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-26wrapper.c: add and use warn_on_fopen_errors()Libravatar Nguyễn Thái Ngọc Duy1-3/+3
In many places, Git warns about an inaccessible file after a fopen() failed. To discern these cases from other cases where we want to warn about inaccessible files, introduce a new helper specifically to test whether fopen() failed because the current user lacks the permission to open file in question. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-22dir: expose cmp_name() and check_contains()Libravatar Samuel Lijin1-5/+6
We want to use cmp_name() and check_contains() (which both compare `struct dir_entry`s, the former in terms of the sort order, the latter in terms of whether one lexically contains another) outside of dir.c, so we have to (1) change their linkage and (2) rename them as appropriate for the global namespace. The second is achieved by renaming cmp_name() to cmp_dir_entry() and check_contains() to check_dir_entry_contains(). Signed-off-by: Samuel Lijin <sxlijin@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-22dir: hide untracked contents of untracked dirsLibravatar Samuel Lijin1-0/+31
When we taught read_directory_recursive() to recurse into untracked directories in search of ignored files given DIR_SHOW_IGNORED_TOO, that had the side effect of teaching it to collect the untracked contents of untracked directories. It doesn't always make sense to return these, though (we do need them for `clean -d`), so we introduce a flag (DIR_KEEP_UNTRACKED_CONTENTS) to control whether or not read_directory() strips dir->entries of the untracked contents of untracked dirs. We also introduce check_contains() to check if one dir_entry corresponds to a path which contains the path corresponding to another dir_entry. This also fixes known breakages in t7061, since status --ignored now searches untracked directories for ignored files. Signed-off-by: Samuel Lijin <sxlijin@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-22dir: recurse into untracked dirs for ignored filesLibravatar Samuel Lijin1-1/+4
We consider directories containing only untracked and ignored files to be themselves untracked, which in the usual case means we don't have to search these directories. This is problematic when we want to collect ignored files with DIR_SHOW_IGNORED_TOO, though, so we teach read_directory_recursive() to recurse into untracked directories to find the ignored files they contain when DIR_SHOW_IGNORED_TOO is set. This has the side effect of also collecting all untracked files in untracked directories as well. Signed-off-by: Samuel Lijin <sxlijin@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert fill_directory to take an indexLibravatar Brandon Williams1-2/+4
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert read_directory to take an indexLibravatar Brandon Williams1-8/+8
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert read_directory_recursive to take an indexLibravatar Brandon Williams1-23/+29
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert open_cached_dir to take an indexLibravatar Brandon Williams1-5/+7
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert is_excluded to take an indexLibravatar Brandon Williams1-7/+9
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert prep_exclude to take an indexLibravatar Brandon Williams1-6/+8
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert add_excludes to take an indexLibravatar Brandon Williams1-14/+15
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert is_excluded_from_list to take an indexLibravatar Brandon Williams1-2/+3
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert last_exclude_matching_from_list to take an indexLibravatar Brandon Williams1-5/+8
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert dir_add* to take an indexLibravatar Brandon Williams1-7/+11
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert get_dtype to take indexLibravatar Brandon Williams1-10/+13
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert directory_exists_in_index to take indexLibravatar Brandon Williams1-10/+12
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: convert read_skip_worktree_file_from_index to take an indexLibravatar Brandon Williams1-6/+7
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-06dir: stop using the index compatibility macrosLibravatar Brandon Williams1-20/+21
In order to make it clearer where the_index is being referenced, stop using the index compatibility macros in dir.c. This is to make it easier to identify the functions which need to be convert to taking in a 'struct index_state' as a parameter. The end goal would be to eliminate the need to reference global index state in dir.c. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-28Merge branch 'sb/checkout-recurse-submodules'Libravatar Junio C Hamano1-11/+21
"git checkout" is taught the "--recurse-submodules" option. * sb/checkout-recurse-submodules: builtin/read-tree: add --recurse-submodules switch builtin/checkout: add --recurse-submodules switch entry.c: create submodules when interesting unpack-trees: check if we can perform the operation for submodules unpack-trees: pass old oid to verify_clean_submodule update submodules: add submodule_move_head submodule.c: get_super_prefix_or_empty update submodules: move up prepare_submodule_repo_env submodules: introduce check to see whether to touch a submodule update submodules: add a config option to determine if submodules are updated update submodules: add submodule config parsing make is_submodule_populated gently lib-submodule-update.sh: define tests for recursing into submodules lib-submodule-update.sh: replace sha1 by hash lib-submodule-update: teach test_submodule_content the -C <dir> flag lib-submodule-update.sh: do not use ./. as submodule remote lib-submodule-update.sh: reorder create_lib_submodule_repo submodule--helper.c: remove duplicate code connect_work_tree_and_git_dir: safely create leading directories
2017-03-17Merge branch 'bw/attr-pathspec'Libravatar Junio C Hamano1-3/+40
The pathspec mechanism learned to further limit the paths that match the pattern to those that have specified attributes attached via the gitattributes mechanism. * bw/attr-pathspec: pathspec: allow escaped query values pathspec: allow querying for attributes
2017-03-15connect_work_tree_and_git_dir: safely create leading directoriesLibravatar Stefan Beller1-11/+21
In a later patch we'll use connect_work_tree_and_git_dir when the directory for the gitlink file doesn't exist yet. This patch makes connect_work_tree_and_git_dir safe to use for both cases of either the git dir or the working dir missing. To do so, we need to call safe_create_leading_directories[_const] on both directories. However this has to happen before we construct the absolute paths as real_pathdup assumes the directories to be there already. So for both the config file in the git dir as well as the .git link file we need to a) construct the name b) call SCLD c) get the absolute path d) once a-c is done for both we can consume the absolute path to compute the relative path to each other and store those relative paths. The implementation provided here puts a) and b) for both cases first, and then performs c and d after. One of the two users of 'connect_work_tree_and_git_dir' already checked for the directory being there, so we can loose that check as connect_work_tree_and_git_dir handles this functionality now. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-13pathspec: allow querying for attributesLibravatar Brandon Williams1-3/+40
The pathspec mechanism is extended via the new ":(attr:eol=input)pattern/to/match" syntax to filter paths so that it requires paths to not just match the given pattern but also have the specified attrs attached for them to be chosen. Based on a patch by Stefan Beller <sbeller@google.com> Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-08real_pathdup(): fix callsites that wanted it to die on errorLibravatar Johannes Schindelin1-2/+2
In 4ac9006f832 (real_path: have callers use real_pathdup and strbuf_realpath, 2016-12-12), we changed the xstrdup(real_path()) pattern to use real_pathdup() directly. The problem with this change is that real_path() calls strbuf_realpath() with die_on_error = 1 while real_pathdup() calls it with die_on_error = 0. Meaning that in cases where real_path() causes Git to die() with an error message, real_pathdup() is silent and returns NULL instead. The callers, however, are ill-prepared for that change, as they expect the return value to be non-NULL (and otherwise the function died with an appropriate error message). Fix this by extending real_pathdup()'s signature to accept the die_on_error flag and simply pass it through to strbuf_realpath(), and then adjust all callers after a careful audit whether they would handle NULLs well. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-08dir: avoid allocation in fill_directory()Libravatar René Scharfe1-4/+3
Pass the match member of the first pathspec item directly to read_directory() instead of using common_prefix() to duplicate it first, thus avoiding memory duplication, strlen(3) and free(3). Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-01-18Merge branch 'bw/realpath-wo-chdir'Libravatar Junio C Hamano1-2/+2
The implementation of "real_path()" was to go there with chdir(2) and call getcwd(3), but this obviously wouldn't be usable in a threaded environment. Rewrite it to manually resolve relative paths including symbolic links in path components. * bw/realpath-wo-chdir: real_path: set errno when max number of symlinks is exceeded real_path: prevent redefinition of MAXSYMLINKS
2017-01-18Merge branch 'bw/pathspec-cleanup'Libravatar Junio C Hamano1-107/+84
Code clean-up in the pathspec API. * bw/pathspec-cleanup: pathspec: rename prefix_pathspec to init_pathspec_item pathspec: small readability changes pathspec: create strip submodule slash helpers pathspec: create parse_element_magic helper pathspec: create parse_long_magic function pathspec: create parse_short_magic function pathspec: factor global magic into its own function pathspec: simpler logic to prefix original pathspec elements pathspec: always show mnemonic and name in unsupported_magic pathspec: remove unused variable from unsupported_magic pathspec: copy and free owned memory pathspec: remove the deprecated get_pathspec function ls-tree: convert show_recursive to use the pathspec struct interface dir: convert fill_directory to use the pathspec struct interface dir: remove struct path_simplify mv: remove use of deprecated 'get_pathspec()'
2017-01-08dir: convert fill_directory to use the pathspec struct interfaceLibravatar Brandon Williams1-4/+8
Convert 'fill_directory()' to use the pathspec struct interface from using the '_raw' entry in the pathspec struct. Signed-off-by: Brandon Williams <bmwill@google.com> Reviewed-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>