Currently, it's not possible to use the space-ignoring options (-b, -w,
--ignore-space-at-eol) with combined diff. It makes it pretty impossible
to read a merge between a branch that changed all tabs to spaces, and a
branch with functional changes.

Pass diff flags to diff engine, so that combined diff behaves as normal
diff does with spaces.

It also means that a conflict-less merge done using a ignore-* strategy
option will not show any conflict if shown in combined-diff using the
same option.

Signed-off-by: Antoine Pelisse <>
That should be reviewed carefully as I'm not exactly sure that does make
sense with the way combined-diff works.
Still it seems natural to me to be able to remove the space in combined
diff as we do with normal diff. Especially as I unfortunately have to
deal with many space + feature merges that are very hard to analyze/handle
if space differences can't be hidden.


 combine-diff.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/combine-diff.c b/combine-diff.c
index 35d41cd..7ca0a72 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -215,7 +215,7 @@ static void combine_diff(const unsigned char *parent, 
unsigned int mode,
                         struct sline *sline, unsigned int cnt, int n,
                         int num_parent, int result_deleted,
                         struct userdiff_driver *textconv,
-                        const char *path)
+                        const char *path, long flags)
        unsigned int p_lno, lno;
        unsigned long nmask = (1UL << n);
@@ -231,7 +231,7 @@ static void combine_diff(const unsigned char *parent, 
unsigned int mode,
        parent_file.ptr = grab_blob(parent, mode, &sz, textconv, path);
        parent_file.size = sz;
        memset(&xpp, 0, sizeof(xpp));
-       xpp.flags = 0;
+       xpp.flags = flags;
        memset(&xecfg, 0, sizeof(xecfg));
        memset(&state, 0, sizeof(state));
        state.nmask = nmask;
@@ -962,7 +962,7 @@ static void show_patch_diff(struct combine_diff_path *elem, 
int num_parent,
                                     &result_file, sline,
                                     cnt, i, num_parent, result_deleted,
-                                    textconv, elem->path);
+                                    textconv, elem->path, opt->xdl_opts);

        show_hunks = make_hunks(sline, cnt, num_parent, dense);

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