Return a copy of the options hash containing only keys that can be
passed to Rugged. Allowed options are:
:max_size ::
An integer specifying the maximum byte size of a file before a it
will be treated as binary. The default value is 512MB.
:context_lines ::
The number of unchanged lines that define the boundary of a hunk
(and to display before and after the actual changes). The default is
3.
:interhunk_lines ::
The maximum number of unchanged lines between hunk boundaries before
the hunks will be merged into a one. The default is 0.
:old_prefix ::
The virtual "directory" to prefix to old filenames in hunk headers.
The default is "a".
:new_prefix ::
The virtual "directory" to prefix to new filenames in hunk headers.
The default is "b".
:reverse ::
If true, the sides of the diff will be reversed.
:force_text ::
If true, all files will be treated as text, disabling binary
attributes & detection.
:ignore_whitespace ::
If true, all whitespace will be ignored.
:ignore_whitespace_change ::
If true, changes in amount of whitespace will be ignored.
:ignore_whitespace_eol ::
If true, whitespace at end of line will be ignored.
:ignore_submodules ::
if true, submodules will be excluded from the diff completely.
:patience ::
If true, the "patience diff" algorithm will be used (currenlty
unimplemented).
:include_ignored ::
If true, ignored files will be included in the diff.
:include_untracked ::
If true, untracked files will be included in the diff.
:include_unmodified ::
If true, unmodified files will be included in the diff.
:recurse_untracked_dirs ::
Even if +:include_untracked+ is true, untracked directories will
only be marked with a single entry in the diff. If this flag is set
to true, all files under ignored directories will be included in the
diff, too.
:disable_pathspec_match ::
If true, the given +*paths+ will be applied as exact matches,
instead of as fnmatch patterns.
:deltas_are_icase ::
If true, filename comparisons will be made with case-insensitivity.
:include_untracked_content ::
if true, untracked content will be contained in the the diff patch
text.
:skip_binary_check ::
If true, diff deltas will be generated without spending time on
binary detection. This is useful to improve performance in cases
where the actual file content difference is not needed.
:include_typechange ::
If true, type changes for files will not be interpreted as deletion
of the "old file" and addition of the "new file", but will generate
typechange records.
:include_typechange_trees ::
Even if +:include_typechange+ is true, blob -> tree changes will
still usually be handled as a deletion of the blob. If this flag is
set to true, blob -> tree changes will be marked as typechanges.
:ignore_filemode ::
If true, file mode changes will be ignored.
:recurse_ignored_dirs ::
Even if +:include_ignored+ is true, ignored directories will only be
marked with a single entry in the diff. If this flag is set to true,
all files under ignored directories will be included in the diff,
too.