[PATCH] diff.c: offer config option to control ws handling in move detection

[Stefan Beller]

Signed-off-by: Stefan Beller <sbel...@google.com>
---

This is the cherry on the cake named sb/diff-color-move-more.

 Documentation/config.txt       | 5 +++++
 Documentation/diff-options.txt | 7 +++++--
 diff.c                         | 9 +++++++++
 3 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index 2659153cb37..6ca7118b018 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1122,6 +1122,11 @@ diff.colorMoved::
        true the default color mode will be used. When set to false,
        moved lines are not colored.
 
+diff.colorMovedWS::
+       When moved lines are colored using e.g. the `diff.colorMoved` setting,
+       this option controls the `<mode>` how spaces are treated
+       for details of valid modes see '--color-moved-ws' in 
linkgit:git-diff[1].
+
 color.diff.<slot>::
        Use customized color for diff colorization.  `<slot>` specifies
        which part of the patch to use the specified color, and is one
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 143acd9417e..8da7fed4e22 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -294,8 +294,11 @@ dimmed_zebra::
 
 --color-moved-ws=<modes>::
        This configures how white spaces are ignored when performing the
-       move detection for `--color-moved`. These modes can be given
-       as a comma separated list:
+       move detection for `--color-moved`.
+ifdef::git-diff[]
+       It can be set by the `diff.colorMovedWS` configuration setting.
+endif::git-diff[]
+       These modes can be given as a comma separated list:
 +
 --
 ignore-space-at-eol::
diff --git a/diff.c b/diff.c
index f51f0ac32f4..9de917108d8 100644
--- a/diff.c
+++ b/diff.c
@@ -35,6 +35,7 @@ static int diff_rename_limit_default = 400;
 static int diff_suppress_blank_empty;
 static int diff_use_color_default = -1;
 static int diff_color_moved_default;
+static int diff_color_moved_ws_default;
 static int diff_context_default = 3;
 static int diff_interhunk_context_default;
 static const char *diff_word_regex_cfg;
@@ -332,6 +333,13 @@ int git_diff_ui_config(const char *var, const char *value, 
void *cb)
                diff_color_moved_default = cm;
                return 0;
        }
+       if (!strcmp(var, "diff.colormovedws")) {
+               int cm = parse_color_moved_ws(value);
+               if (cm < 0)
+                       return -1;
+               diff_color_moved_ws_default = cm;
+               return 0;
+       }
        if (!strcmp(var, "diff.context")) {
                diff_context_default = git_config_int(var, value);
                if (diff_context_default < 0)
@@ -4327,6 +4335,7 @@ void diff_setup(struct diff_options *options)
        }
 
        options->color_moved = diff_color_moved_default;
+       options->color_moved_ws_handling = diff_color_moved_ws_default;
 }
 
 void diff_setup_done(struct diff_options *options)
-- 
2.18.0.233.g985f88cf7e-goog