65edd96aec
The first consumer of pattern-matching filenames was the .gitignore feature. In that context, storing a list of patterns as a 'struct exclude_list' makes sense. However, the sparse-checkout feature then adopted these structures and methods, but with the opposite meaning: these patterns match the files that should be included! It would be clearer to rename this entire library as a "pattern matching" library, and the callers apply exclusion/inclusion logic accordingly based on their needs. This commit renames several methods defined in dir.h to make more sense with the renamed 'struct exclude_list' to 'struct pattern_list' and 'struct exclude' to 'struct path_pattern': * last_exclude_matching() -> last_matching_pattern() * parse_exclude() -> parse_path_pattern() In addition, the word 'exclude' was replaced with 'pattern' in the methods below: * add_exclude_list() * add_excludes_from_file_to_list() * add_excludes_from_file() * add_excludes_from_blob_to_list() * add_exclude() * clear_exclude_list() A few methods with the word "exclude" remain. These will be handled seperately. In particular, the method "is_excluded()" is concretely about the .gitignore file relative to a specific directory. This is the important boundary between library and consumer: is_excluded() cares about .gitignore, but is_excluded() calls last_matching_pattern() to make that decision. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
131 lines
3.7 KiB
Plaintext
131 lines
3.7 KiB
Plaintext
directory listing API
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=====================
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The directory listing API is used to enumerate paths in the work tree,
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optionally taking `.git/info/exclude` and `.gitignore` files per
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directory into account.
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Data structure
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--------------
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`struct dir_struct` structure is used to pass directory traversal
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options to the library and to record the paths discovered. A single
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`struct dir_struct` is used regardless of whether or not the traversal
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recursively descends into subdirectories.
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The notable options are:
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`exclude_per_dir`::
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The name of the file to be read in each directory for excluded
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files (typically `.gitignore`).
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`flags`::
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A bit-field of options:
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`DIR_SHOW_IGNORED`:::
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Return just ignored files in `entries[]`, not untracked
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files. This flag is mutually exclusive with
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`DIR_SHOW_IGNORED_TOO`.
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`DIR_SHOW_IGNORED_TOO`:::
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Similar to `DIR_SHOW_IGNORED`, but return ignored files in
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`ignored[]` in addition to untracked files in
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`entries[]`. This flag is mutually exclusive with
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`DIR_SHOW_IGNORED`.
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`DIR_KEEP_UNTRACKED_CONTENTS`:::
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Only has meaning if `DIR_SHOW_IGNORED_TOO` is also set; if this is set, the
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untracked contents of untracked directories are also returned in
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`entries[]`.
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`DIR_SHOW_IGNORED_TOO_MODE_MATCHING`:::
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Only has meaning if `DIR_SHOW_IGNORED_TOO` is also set; if
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this is set, returns ignored files and directories that match
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an exclude pattern. If a directory matches an exclude pattern,
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then the directory is returned and the contained paths are
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not. A directory that does not match an exclude pattern will
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not be returned even if all of its contents are ignored. In
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this case, the contents are returned as individual entries.
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+
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If this is set, files and directories that explicitly match an ignore
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pattern are reported. Implicitly ignored directories (directories that
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do not match an ignore pattern, but whose contents are all ignored)
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are not reported, instead all of the contents are reported.
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`DIR_COLLECT_IGNORED`:::
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Special mode for git-add. Return ignored files in `ignored[]` and
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untracked files in `entries[]`. Only returns ignored files that match
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pathspec exactly (no wildcards). Does not recurse into ignored
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directories.
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`DIR_SHOW_OTHER_DIRECTORIES`:::
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Include a directory that is not tracked.
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`DIR_HIDE_EMPTY_DIRECTORIES`:::
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Do not include a directory that is not tracked and is empty.
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`DIR_NO_GITLINKS`:::
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If set, recurse into a directory that looks like a Git
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directory. Otherwise it is shown as a directory.
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The result of the enumeration is left in these fields:
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`entries[]`::
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An array of `struct dir_entry`, each element of which describes
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a path.
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`nr`::
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The number of members in `entries[]` array.
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`alloc`::
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Internal use; keeps track of allocation of `entries[]` array.
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`ignored[]`::
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An array of `struct dir_entry`, used for ignored paths with the
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`DIR_SHOW_IGNORED_TOO` and `DIR_COLLECT_IGNORED` flags.
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`ignored_nr`::
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The number of members in `ignored[]` array.
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Calling sequence
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----------------
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Note: index may be looked at for .gitignore files that are CE_SKIP_WORKTREE
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marked. If you to exclude files, make sure you have loaded index first.
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* Prepare `struct dir_struct dir` and clear it with `memset(&dir, 0,
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sizeof(dir))`.
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* To add single exclude pattern, call `add_pattern_list()` and then
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`add_pattern()`.
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* To add patterns from a file (e.g. `.git/info/exclude`), call
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`add_patterns_from_file()` , and/or set `dir.exclude_per_dir`. A
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short-hand function `setup_standard_excludes()` can be used to set
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up the standard set of exclude settings.
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* Set options described in the Data Structure section above.
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* Call `read_directory()`.
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* Use `dir.entries[]`.
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* Call `clear_directory()` when none of the contained elements are no longer in use.
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(JC)
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