Try to eliminate unused diff options

lib/gitlab/git/diff.rb

+# Gitaly note: JV: needs RPC for Gitlab::Git::Diff.between.
+
 # Gitlab::Git::Diff is a wrapper around native Rugged::Diff object
 module Gitlab
   module Git
@@ -81,110 +83,16 @@ module Gitlab
         # 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.
         def filter_diff_options(options, default_options = {})
-          allowed_options = [:max_size, :context_lines, :interhunk_lines,
-                             :old_prefix, :new_prefix, :reverse, :force_text,
-                             :ignore_whitespace, :ignore_whitespace_change,
-                             :ignore_whitespace_eol, :ignore_submodules,
-                             :patience, :include_ignored, :include_untracked,
-                             :include_unmodified, :recurse_untracked_dirs,
-                             :disable_pathspec_match, :deltas_are_icase,
-                             :include_untracked_content, :skip_binary_check,
-                             :include_typechange, :include_typechange_trees,
-                             :ignore_filemode, :recurse_ignored_dirs, :paths,
+          allowed_options = [:ignore_whitespace_change,
+                             :disable_pathspec_match, :paths,
                              :max_files, :max_lines, :limits, :expanded]
 
           if default_options

spec/lib/gitlab/git/diff_spec.rb

@@ -241,7 +241,7 @@ EOT
   end
 
   describe '.filter_diff_options' do
-    let(:options) { { max_size: 100, invalid_opt: true } }
+    let(:options) { { max_files: 100, invalid_opt: true } }
 
     context "without default options" do
       let(:filtered_options) { described_class.filter_diff_options(options) }
@@ -253,7 +253,7 @@ EOT
 
     context "with default options" do
       let(:filtered_options) do
-        default_options = { max_size: 5, bad_opt: 1, ignore_whitespace: true }
+        default_options = { max_files: 5, bad_opt: 1, ignore_whitespace_change: true }
         described_class.filter_diff_options(options, default_options)
       end
 
@@ -263,12 +263,12 @@ EOT
       end
 
       it "should merge with default options" do
-        expect(filtered_options).to have_key(:ignore_whitespace)
+        expect(filtered_options).to have_key(:ignore_whitespace_change)
       end
 
       it "should override default options" do
-        expect(filtered_options).to have_key(:max_size)
-        expect(filtered_options[:max_size]).to eq(100)
+        expect(filtered_options).to have_key(:max_files)
+        expect(filtered_options[:max_files]).to eq(100)
       end
     end
   end