From: Rohit Ashiwal <rohit.ashiwal265@xxxxxxxxx>
Rebase is implemented with two different backends - 'apply' and
'merge' each of which support a different set of options. In
particular the apply backend supports a number of options implemented
by 'git am' that are not implemented in the merge backend. This means
that the available options are different depending on which backend is
used which is confusing. This patch adds support for the
--ignore-whitespace option to the merge backend. This option treats
lines with only whitespace changes as unchanged and is implemented in
the merge backend by translating it to -Xignore-space-change.
Signed-off-by: Rohit Ashiwal <rohit.ashiwal265@xxxxxxxxx>
Signed-off-by: Phillip Wood <phillip.wood@xxxxxxxxxxxxx>
---
Documentation/git-rebase.txt | 19 +++++++-
builtin/rebase.c | 16 +++++--
t/t3422-rebase-incompatible-options.sh | 1 -
t/t3436-rebase-more-options.sh | 60 ++++++++++++++++++++++++++
4 files changed, 90 insertions(+), 6 deletions(-)
create mode 100755 t/t3436-rebase-more-options.sh
diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index f7a6033607..b003784f01 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -422,8 +422,23 @@ your branch contains commits which were dropped, this option can be used
with `--keep-base` in order to drop those commits from your branch.
--ignore-whitespace::
+ Ignore whitespace differences when trying to reconcile
+differences. Currently, each backend implements an approximation of
+this behavior:
++
+apply backend: When applying a patch, ignore changes in whitespace in
+context lines. Unfortunately, this means that if the "old" lines being
+replaced by the patch differ only in whitespace from the existing
+file, you will get a merge conflict instead of a successful patch
+application.
++
+merge backend: Treat lines with only whitespace changes as unchanged
+when merging. Unfortunately, this means that any patch hunks that were
+intended to modify whitespace and nothing else will be dropped, even
+if the other side had no changes that conflicted.
+
--whitespace=<option>::
- These flags are passed to the 'git apply' program
+ This flag is passed to the 'git apply' program
(see linkgit:git-apply[1]) that applies the patch.
Implies --apply.
+
@@ -572,7 +587,6 @@ The following options:
* --apply
* --committer-date-is-author-date
* --ignore-date
- * --ignore-whitespace
* --whitespace
* -C
@@ -598,6 +612,7 @@ In addition, the following pairs of options are incompatible:
* --preserve-merges and --signoff
* --preserve-merges and --rebase-merges
* --preserve-merges and --empty=
+ * --preserve-merges and --ignore-whitespace
* --keep-base and --onto
* --keep-base and --root
diff --git a/builtin/rebase.c b/builtin/rebase.c
index 27a07d4e78..810c9b7779 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -126,6 +126,7 @@ static struct replay_opts get_replay_opts(const struct rebase_options *opts)
replay.reschedule_failed_exec = opts->reschedule_failed_exec;
replay.gpg_sign = xstrdup_or_null(opts->gpg_sign_opt);
replay.strategy = opts->strategy;
+
if (opts->strategy_opts)
parse_strategy_opts(&replay, opts->strategy_opts);
@@ -1466,6 +1467,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
struct strbuf revisions = STRBUF_INIT;
struct strbuf buf = STRBUF_INIT;
struct object_id merge_base;
+ int ignore_whitespace = 0;
enum action action = ACTION_NONE;
const char *gpg_sign = NULL;
struct string_list exec = STRING_LIST_INIT_NODUP;
@@ -1495,16 +1497,15 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
PARSE_OPT_NOARG, NULL, REBASE_DIFFSTAT },
OPT_BOOL(0, "signoff", &options.signoff,
N_("add a Signed-off-by: line to each commit")),
- OPT_PASSTHRU_ARGV(0, "ignore-whitespace", &options.git_am_opts,
- NULL, N_("passed to 'git am'"),
- PARSE_OPT_NOARG),
OPT_PASSTHRU_ARGV(0, "committer-date-is-author-date",
&options.git_am_opts, NULL,
N_("passed to 'git am'"), PARSE_OPT_NOARG),
OPT_PASSTHRU_ARGV(0, "ignore-date", &options.git_am_opts, NULL,
N_("passed to 'git am'"), PARSE_OPT_NOARG),
OPT_PASSTHRU_ARGV('C', NULL, &options.git_am_opts, N_("n"),
N_("passed to 'git apply'"), 0),
+ OPT_BOOL(0, "ignore-whitespace", &ignore_whitespace,
+ N_("ignore changes in whitespace")),
OPT_PASSTHRU_ARGV(0, "whitespace", &options.git_am_opts,
N_("action"), N_("passed to 'git apply'"), 0),
OPT_BIT('f', "force-rebase", &options.flags,
@@ -1850,6 +1851,15 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
imply_merge(&options, "--rebase-merges");
}
+ if (options.type == REBASE_APPLY) {
+ if (ignore_whitespace)
+ argv_array_push (&options.git_am_opts,
+ "--ignore-whitespace");
+ } else if (ignore_whitespace) {
+ string_list_append (&strategy_options,
+ "ignore-space-change");
+ }
+
