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[PATCH v2 3/3] rebase --keep-empty: always use interactive rebase

From
PWPhillip Wood <phillip.wood@talktalk.net>
Date
Mar 20, 2018, 11:10 UTC
Message-ID
<20180320111057.23862-4-phillip.wood@talktalk.net>
In-Reply-To
<20180320111057.23862-1-phillip.wood@talktalk.net>
From: Phillip Wood <phillip.wood@dunelm.org.uk>

rebase --merge accepts --keep-empty but just ignores it, by using an implicit interactive rebase the user still gets the rename detection of a merge based rebase but with with --keep-empty support.

If rebase --keep-empty without --interactive or --merge stops for the user to resolve merge conflicts then 'git rebase --continue' will fail. This is because it uses a different code path that does not create $git_dir/rebase-apply. As rebase --keep-empty was implemented using cherry-pick it has never supported the am options and now that interactive rebases support --signoff there is no loss of functionality by using an implicit interactive rebase.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
---
 git-rebase--am.sh                 | 79 ++++++++++++++++-----------------------
 git-rebase.sh                     |  5 +++
 t/t3421-rebase-topology-linear.sh |  4 +-
 3 files changed, 40 insertions(+), 48 deletions(-)
diff --git a/git-rebase--am.sh b/git-rebase--am.sh
index be3f068922..ae596d3731 100644
--- a/git-rebase--am.sh
+++ b/git-rebase--am.sh
@@ -41,60 +41,47 @@ else
 fi
 
 ret=0
-if test -n "$keep_empty"
-then
-	# we have to do this the hard way.  git format-patch completely squashes
-	# empty commits and even if it didn't the format doesn't really lend
-	# itself well to recording empty patches.  fortunately, cherry-pick
-	# makes this easy
-	git cherry-pick ${gpg_sign_opt:+"$gpg_sign_opt"} --allow-empty \
-		$allow_rerere_autoupdate --right-only "$revisions" \
-		$allow_empty_message \
-		${restrict_revision+^$restrict_revision}
-	ret=$?
-else
-	rm -f "$GIT_DIR/rebased-patches"
+rm -f "$GIT_DIR/rebased-patches"
 
-	git format-patch -k --stdout --full-index --cherry-pick --right-only \
-		--src-prefix=a/ --dst-prefix=b/ --no-renames --no-cover-letter \
-		--pretty=mboxrd \
-		$git_format_patch_opt \
-		"$revisions" ${restrict_revision+^$restrict_revision} \
-		>"$GIT_DIR/rebased-patches"
-	ret=$?
+git format-patch -k --stdout --full-index --cherry-pick --right-only \
+	--src-prefix=a/ --dst-prefix=b/ --no-renames --no-cover-letter \
+	--pretty=mboxrd \
+	$git_format_patch_opt \
+	"$revisions" ${restrict_revision+^$restrict_revision} \
+	>"$GIT_DIR/rebased-patches"
+ret=$?
 
-	if test 0 != $ret
-	then
-		rm -f "$GIT_DIR/rebased-patches"
-		case "$head_name" in
-		refs/heads/*)
-			git checkout -q "$head_name"
-			;;
-		*)
-			git checkout -q "$orig_head"
-			;;
-		esac
+if test 0 != $ret
+then
+	rm -f "$GIT_DIR/rebased-patches"
+	case "$head_name" in
+	refs/heads/*)
+		git checkout -q "$head_name"
+		;;
+	*)
+		git checkout -q "$orig_head"
+		;;
+	esac
 
-		cat >&2 <<-EOF
+	cat >&2 <<-EOF
 
-		git encountered an error while preparing the patches to replay
-		these revisions:
+	git encountered an error while preparing the patches to replay
+	these revisions:
 
-		    $revisions
+	    $revisions
 
-		As a result, git cannot rebase them.
-		EOF
-		return $ret
-	fi
+	As a result, git cannot rebase them.
+	EOF
+	return $ret
+fi
 
-	git am $git_am_opt --rebasing --resolvemsg="$resolvemsg" \
-		--patch-format=mboxrd \
-		$allow_rerere_autoupdate \
-		${gpg_sign_opt:+"$gpg_sign_opt"} <"$GIT_DIR/rebased-patches"
-	ret=$?
+git am $git_am_opt --rebasing --resolvemsg="$resolvemsg" \
+	--patch-format=mboxrd \
+	$allow_rerere_autoupdate \
+	${gpg_sign_opt:+"$gpg_sign_opt"} <"$GIT_DIR/rebased-patches"
+ret=$?
 
-	rm -f "$GIT_DIR/rebased-patches"
-fi
+rm -f "$GIT_DIR/rebased-patches"
 
 if test 0 != $ret
 then
diff --git a/git-rebase.sh b/git-rebase.sh
index 7d3bb9d443..ad1a3bd3ef 100755
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -459,6 +459,11 @@ then
 	test -z "$interactive_rebase" && interactive_rebase=implied
 fi
 
+if test -n "$keep_empty"
+then
+	test -z "$interactive_rebase" && interactive_rebase=implied
+fi
+
 if test -n "$interactive_rebase"
 then
 	type=interactive
diff --git a/t/t3421-rebase-topology-linear.sh b/t/t3421-rebase-topology-linear.sh
index 68fe2003ef..13e5c1a2f1 100755
--- a/t/t3421-rebase-topology-linear.sh
+++ b/t/t3421-rebase-topology-linear.sh
@@ -199,7 +199,7 @@ test_run_rebase () {
 	"
 }
 test_run_rebase success ''
-test_run_rebase failure -m
+test_run_rebase success -m
 test_run_rebase success -i
 test_run_rebase failure -p
 
@@ -214,7 +214,7 @@ test_run_rebase () {
 	"
 }
 test_run_rebase success ''
-test_run_rebase failure -m
+test_run_rebase success -m
 test_run_rebase failure -i
 test_run_rebase failure -p
 
-- 
2.16.2
Previous: Phillip WoodNext: Johannes Schindelin
Message 13 of 15 in “rebase: support --signoff with implicit rebase”
  1. 1/2 rebase: support --signoff with implicit rebasePhillip Wood, Mar 14, 2018
  2. 2/2 rebase --root -k: fix when root commit is emptyPhillip Wood, Mar 14, 2018
  3. Johannes SchindelinMar 15, 2018
  4. Phillip WoodMar 15, 2018
  5. Junio C HamanoMar 14, 2018
  6. Johannes SchindelinMar 15, 2018
  7. Johannes SchindelinMar 15, 2018
  8. Phillip WoodMar 15, 2018
  9. Johannes SchindelinMar 16, 2018
  10. 0/3 rebase: extend --signoff supportPhillip Wood, Mar 20, 2018
  11. 2/3 rebase -p: error out if --signoff is givenPhillip Wood, Mar 20, 2018
  12. 1/3 rebase: extend --signoff supportPhillip Wood, Mar 20, 2018
  13. 3/3 rebase --keep-empty: always use interactive rebasePhillip Wood, Mar 20, 2018
  14. Johannes SchindelinMar 20, 2018
  15. Phillip WoodMar 20, 2018

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