[PATCH] rebase -i: Remember merge options beyond continue actions

[PATCH] rebase -i: Remember merge options beyond continue actions

[Fabian Ruch]

If the user explicitly specified a merge strategy or strategy options,
"rebase --interactive" started using the default merge strategy again
after "rebase --continue".

This problem gets fixed by this commit. Add test.

Since the "rebase" options "-s" and "-X" imply "--merge", we can simply
remove the "do_merge" guard in the interactive mode and always compile
the "cherry-pick" arguments from the "rebase" state variables "strategy"
and "strategy_opts".
---
 git-rebase--interactive.sh    | 18 +++++++-----------
 t/t3404-rebase-interactive.sh | 16 ++++++++++++++++
 2 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index 6ec9d3c..817c933 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -77,17 +77,13 @@ amend="$state_dir"/amend
 rewritten_list="$state_dir"/rewritten-list
 rewritten_pending="$state_dir"/rewritten-pending
 
-strategy_args=
-if test -n "$do_merge"
-then
-	strategy_args=${strategy:+--strategy=$strategy}
-	eval '
-		for strategy_opt in '"$strategy_opts"'
-		do
-			strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
-		done
-	'
-fi
+strategy_args=${strategy:+--strategy=$strategy}
+eval '
+	for strategy_opt in '"$strategy_opts"'
+	do
+		strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
+	done
+'
 
 GIT_CHERRY_PICK_HELP="$resolvemsg"
 export GIT_CHERRY_PICK_HELP
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index c0023a5..73849f1 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -998,6 +998,22 @@ test_expect_success 'rebase -i with --strategy and -X' '
 	test $(cat file1) = Z
 '
 
+test_expect_success 'interrupted rebase -i with --strategy and -X' '
+	git checkout -b conflict-merge-use-theirs-interrupted conflict-branch &&
+	git reset --hard HEAD^ &&
+	>breakpoint &&
+	git add breakpoint &&
+	git commit -m "breakpoint for interactive mode" &&
+	echo five >conflict &&
+	echo Z >file1 &&
+	git commit -a -m "one file conflict" &&
+	set_fake_editor &&
+	FAKE_LINES="edit 1 2" git rebase -i --strategy=recursive -Xours conflict-branch &&
+	git rebase --continue &&
+	test $(git show conflict-branch:conflict) = $(cat conflict) &&
+	test $(cat file1) = Z
+'
+
 test_expect_success 'rebase -i error on commits with \ in message' '
 	current_head=$(git rev-parse HEAD)
 	test_when_finished "git rebase --abort; git reset --hard $current_head; rm -f error" &&
-- 
2.0.0

Re: [PATCH] rebase -i: Remember merge options beyond continue actions

[Eric Sunshine]

On Mon, Jun 9, 2014 at 8:02 PM, Fabian Ruch <bafain@gmail.com> wrote:
> If the user explicitly specified a merge strategy or strategy options,
> "rebase --interactive" started using the default merge strategy again
> after "rebase --continue".

For reference, this problem was reported as far back as 2013-08-09 [1].

[1]: http://article.gmane.org/gmane.comp.version-control.git/232013

> This problem gets fixed by this commit. Add test.
>
> Since the "rebase" options "-s" and "-X" imply "--merge", we can simply
> remove the "do_merge" guard in the interactive mode and always compile
> the "cherry-pick" arguments from the "rebase" state variables "strategy"
> and "strategy_opts".

Missing sign-off.

> ---
>  git-rebase--interactive.sh    | 18 +++++++-----------
>  t/t3404-rebase-interactive.sh | 16 ++++++++++++++++
>  2 files changed, 23 insertions(+), 11 deletions(-)
>
> diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
> index 6ec9d3c..817c933 100644
> --- a/git-rebase--interactive.sh
> +++ b/git-rebase--interactive.sh
> @@ -77,17 +77,13 @@ amend="$state_dir"/amend
>  rewritten_list="$state_dir"/rewritten-list
>  rewritten_pending="$state_dir"/rewritten-pending
>
> -strategy_args=
> -if test -n "$do_merge"
> -then
> -       strategy_args=${strategy:+--strategy=$strategy}
> -       eval '
> -               for strategy_opt in '"$strategy_opts"'
> -               do
> -                       strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
> -               done
> -       '
> -fi
> +strategy_args=${strategy:+--strategy=$strategy}
> +eval '
> +       for strategy_opt in '"$strategy_opts"'
> +       do
> +               strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
> +       done
> +'
>
>  GIT_CHERRY_PICK_HELP="$resolvemsg"
>  export GIT_CHERRY_PICK_HELP
> diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
> index c0023a5..73849f1 100755
> --- a/t/t3404-rebase-interactive.sh
> +++ b/t/t3404-rebase-interactive.sh
> @@ -998,6 +998,22 @@ test_expect_success 'rebase -i with --strategy and -X' '
>         test $(cat file1) = Z
>  '
>
> +test_expect_success 'interrupted rebase -i with --strategy and -X' '
> +       git checkout -b conflict-merge-use-theirs-interrupted conflict-branch &&
> +       git reset --hard HEAD^ &&
> +       >breakpoint &&
> +       git add breakpoint &&
> +       git commit -m "breakpoint for interactive mode" &&
> +       echo five >conflict &&
> +       echo Z >file1 &&
> +       git commit -a -m "one file conflict" &&
> +       set_fake_editor &&
> +       FAKE_LINES="edit 1 2" git rebase -i --strategy=recursive -Xours conflict-branch &&
> +       git rebase --continue &&
> +       test $(git show conflict-branch:conflict) = $(cat conflict) &&
> +       test $(cat file1) = Z
> +'
> +
>  test_expect_success 'rebase -i error on commits with \ in message' '
>         current_head=$(git rev-parse HEAD)
>         test_when_finished "git rebase --abort; git reset --hard $current_head; rm -f error" &&
> --
> 2.0.0

Re: [PATCH] rebase -i: Remember merge options beyond continue actions

[Fabian Ruch]

Hi Eric,

thanks a lot for the reference.

I added the Reported-by: and Signed-off-by: lines to the commit message.

   Fabian

-- >8 --
Subject: rebase -i: Remember merge options beyond continue actions

If the user explicitly specified a merge strategy or strategy options,
"rebase --interactive" started using the default merge strategy again
after "rebase --continue".

This problem gets fixed by this commit. Add test.

Since the "rebase" options "-s" and "-X" imply "--merge", we can simply
remove the "do_merge" guard in the interactive mode and always compile
the "cherry-pick" arguments from the "rebase" state variables "strategy"
and "strategy_opts".

Reported-by: Diogo de Campos <campos@esss.com.br>
Signed-off-by: Fabian Ruch <bafain@gmail.com>
---
 git-rebase--interactive.sh    | 18 +++++++-----------
 t/t3404-rebase-interactive.sh | 16 ++++++++++++++++
 2 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index 6ec9d3c..817c933 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -77,17 +77,13 @@ amend="$state_dir"/amend
 rewritten_list="$state_dir"/rewritten-list
 rewritten_pending="$state_dir"/rewritten-pending
 
-strategy_args=
-if test -n "$do_merge"
-then
-	strategy_args=${strategy:+--strategy=$strategy}
-	eval '
-		for strategy_opt in '"$strategy_opts"'
-		do
-			strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
-		done
-	'
-fi
+strategy_args=${strategy:+--strategy=$strategy}
+eval '
+	for strategy_opt in '"$strategy_opts"'
+	do
+		strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
+	done
+'
 
 GIT_CHERRY_PICK_HELP="$resolvemsg"
 export GIT_CHERRY_PICK_HELP
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index c0023a5..73849f1 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -998,6 +998,22 @@ test_expect_success 'rebase -i with --strategy and -X' '
 	test $(cat file1) = Z
 '
 
+test_expect_success 'interrupted rebase -i with --strategy and -X' '
+	git checkout -b conflict-merge-use-theirs-interrupted conflict-branch &&
+	git reset --hard HEAD^ &&
+	>breakpoint &&
+	git add breakpoint &&
+	git commit -m "breakpoint for interactive mode" &&
+	echo five >conflict &&
+	echo Z >file1 &&
+	git commit -a -m "one file conflict" &&
+	set_fake_editor &&
+	FAKE_LINES="edit 1 2" git rebase -i --strategy=recursive -Xours conflict-branch &&
+	git rebase --continue &&
+	test $(git show conflict-branch:conflict) = $(cat conflict) &&
+	test $(cat file1) = Z
+'
+
 test_expect_success 'rebase -i error on commits with \ in message' '
 	current_head=$(git rev-parse HEAD)
 	test_when_finished "git rebase --abort; git reset --hard $current_head; rm -f error" &&
-- 
2.0.0

Re: [PATCH] rebase -i: Remember merge options beyond continue actions

[Michael Haggerty]

The fix seems reasonable to me.  See below for a couple of suggestions
regarding the commit message.

On 06/10/2014 02:37 AM, Fabian Ruch wrote:
> [...]
> -- >8 --
> Subject: rebase -i: Remember merge options beyond continue actions
> 
> If the user explicitly specified a merge strategy or strategy options,
> "rebase --interactive" started using the default merge strategy again
> after "rebase --continue".
> 
> This problem gets fixed by this commit. Add test.

Please phrase commit messages in the imperative voice, as if commanding
git to fix itself.  Maybe

    If the user explicitly specified a merge strategy or strategy
    options, continue to use that strategy/option after
    "rebase --continue".  Add a test of the corrected behavior.

> Since the "rebase" options "-s" and "-X" imply "--merge", we can simply
> remove the "do_merge" guard in the interactive mode and always compile
> the "cherry-pick" arguments from the "rebase" state variables "strategy"
> and "strategy_opts".
> 
> Reported-by: Diogo de Campos <campos@esss.com.br>
> Signed-off-by: Fabian Ruch <bafain@gmail.com>

I expect it took you a while to figure out how the strategy-related
options are handled and propagated from one step of an interactive
rebase to the next and why your fix is correct.  It certainly took *me*
a while even though I had your patch in front of me :-)

It is helpful if you give reviewers and future readers the benefit of
your hard work by spoon-feeding them more of the backstory.  I suggest
expanding your justification to something like this (correct me if I've
misunderstood something!):

    If --merge is specified or implied by -s or -X, then "strategy" and
    "strategy_opts" are set to values from which "strategy_args" can be
    derived; otherwise they are set to empty strings.  Either way,
    their values are propagated from one step of an interactive rebase
    to the next via state files.

    "do_merge", on the other hand, is *not* propagated to later steps of
    an interactive rebase.  Therefore, making the initialization of
    "strategy_args" conditional on "do_merge" being set prevents later
    steps of an interactive rebase from setting it correctly.

    Luckily, we don't need the "do_merge" guard at all.  If the rebase
    was started without --merge, then "strategy" and "strategy_opts"
    are both the empty string, which results in "strategy_args" also
    being set to the empty string, which is just what we want in that
    situation.  So remove the "do_merge" guard and derive
    "strategy_args" from "strategy" and "strategy_opts" every time.

Michael

> ---
>  git-rebase--interactive.sh    | 18 +++++++-----------
>  t/t3404-rebase-interactive.sh | 16 ++++++++++++++++
>  2 files changed, 23 insertions(+), 11 deletions(-)
> 
> diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
> index 6ec9d3c..817c933 100644
> --- a/git-rebase--interactive.sh
> +++ b/git-rebase--interactive.sh
> @@ -77,17 +77,13 @@ amend="$state_dir"/amend
>  rewritten_list="$state_dir"/rewritten-list
>  rewritten_pending="$state_dir"/rewritten-pending
>  
> -strategy_args=
> -if test -n "$do_merge"
> -then
> -	strategy_args=${strategy:+--strategy=$strategy}
> -	eval '
> -		for strategy_opt in '"$strategy_opts"'
> -		do
> -			strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
> -		done
> -	'
> -fi
> +strategy_args=${strategy:+--strategy=$strategy}
> +eval '
> +	for strategy_opt in '"$strategy_opts"'
> +	do
> +		strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
> +	done
> +'
>  
>  GIT_CHERRY_PICK_HELP="$resolvemsg"
>  export GIT_CHERRY_PICK_HELP
> diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
> index c0023a5..73849f1 100755
> --- a/t/t3404-rebase-interactive.sh
> +++ b/t/t3404-rebase-interactive.sh
> @@ -998,6 +998,22 @@ test_expect_success 'rebase -i with --strategy and -X' '
>  	test $(cat file1) = Z
>  '
>  
> +test_expect_success 'interrupted rebase -i with --strategy and -X' '
> +	git checkout -b conflict-merge-use-theirs-interrupted conflict-branch &&
> +	git reset --hard HEAD^ &&
> +	>breakpoint &&
> +	git add breakpoint &&
> +	git commit -m "breakpoint for interactive mode" &&
> +	echo five >conflict &&
> +	echo Z >file1 &&
> +	git commit -a -m "one file conflict" &&
> +	set_fake_editor &&
> +	FAKE_LINES="edit 1 2" git rebase -i --strategy=recursive -Xours conflict-branch &&
> +	git rebase --continue &&
> +	test $(git show conflict-branch:conflict) = $(cat conflict) &&
> +	test $(cat file1) = Z
> +'
> +
>  test_expect_success 'rebase -i error on commits with \ in message' '
>  	current_head=$(git rev-parse HEAD)
>  	test_when_finished "git rebase --abort; git reset --hard $current_head; rm -f error" &&
> 


-- 
Michael Haggerty
mhagger@alum.mit.edu
http://softwareswirl.blogspot.com/

Re: [PATCH] rebase -i: Remember merge options beyond continue actions

[Ralf Thielow]

Hi,

Thanks for the patch. I've had this issue today
and the patch has fixed it. I hope the patch makes
its way to Git.

Ralf

> Hi Eric,
> 
> thanks a lot for the reference.
> 
> I added the Reported-by: and Signed-off-by: lines to the commit message.
> 
>    Fabian
> 
> -- >8 --
> Subject: rebase -i: Remember merge options beyond continue actions
> 
> If the user explicitly specified a merge strategy or strategy options,
> "rebase --interactive" started using the default merge strategy again
> after "rebase --continue".
> 
> This problem gets fixed by this commit. Add test.
> 
> Since the "rebase" options "-s" and "-X" imply "--merge", we can simply
> remove the "do_merge" guard in the interactive mode and always compile
> the "cherry-pick" arguments from the "rebase" state variables "strategy"
> and "strategy_opts".
...

[PATCH] rebase -i: remember merge options beyond continue actions

[Ralf Thielow]

From: Fabian Ruch <bafain@gmail.com>

If the user specifies a merge strategy or strategy options in
"rebase --interactive", also use these in subsequent calls of
"rebase --continue".

In the implementation, the "do_merge" guard to check for a given
merge strategy or strategy options is implied by passing these
options, but not stored.  This prevents subsequent calls of
"rebase --continue" to use this setting again later.  Remove this
"do_merge" guard to allow a later usage.

Reported-by: Diogo de Campos <campos@esss.com.br>
Signed-off-by: Fabian Ruch <bafain@gmail.com>
Helped-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
---
I've been applying the original patch for a long time to my tree,
as it helps me to resolve conflicts e.g. when rebasing .po files.
I also think it's a reasonable change for git-rebase.

I've rebased it agains the current master and rewrote the
commit message to try to make this change technically a bit more
easy to understand.

Original patch submit:
http://thread.gmane.org/gmane.comp.version-control.git/251147/

 git-rebase--interactive.sh    | 18 +++++++-----------
 t/t3404-rebase-interactive.sh | 16 ++++++++++++++++
 2 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index b938a6d..c0cfe88 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -81,17 +81,13 @@ rewritten_pending="$state_dir"/rewritten-pending
 # and leaves CR at the end instead.
 cr=$(printf "\015")
 
-strategy_args=
-if test -n "$do_merge"
-then
-	strategy_args=${strategy:+--strategy=$strategy}
-	eval '
-		for strategy_opt in '"$strategy_opts"'
-		do
-			strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
-		done
-	'
-fi
+strategy_args=${strategy:+--strategy=$strategy}
+eval '
+	for strategy_opt in '"$strategy_opts"'
+	do
+		strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
+	done
+'
 
 GIT_CHERRY_PICK_HELP="$resolvemsg"
 export GIT_CHERRY_PICK_HELP
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index 98eb49a..9a2461c 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -1006,6 +1006,22 @@ test_expect_success 'rebase -i with --strategy and -X' '
 	test $(cat file1) = Z
 '
 
+test_expect_success 'interrupted rebase -i with --strategy and -X' '
+	git checkout -b conflict-merge-use-theirs-interrupted conflict-branch &&
+	git reset --hard HEAD^ &&
+	>breakpoint &&
+	git add breakpoint &&
+	git commit -m "breakpoint for interactive mode" &&
+	echo five >conflict &&
+	echo Z >file1 &&
+	git commit -a -m "one file conflict" &&
+	set_fake_editor &&
+	FAKE_LINES="edit 1 2" git rebase -i --strategy=recursive -Xours conflict-branch &&
+	git rebase --continue &&
+	test $(git show conflict-branch:conflict) = $(cat conflict) &&
+	test $(cat file1) = Z
+'
+
 test_expect_success 'rebase -i error on commits with \ in message' '
 	current_head=$(git rev-parse HEAD) &&
 	test_when_finished "git rebase --abort; git reset --hard $current_head; rm -f error" &&
-- 
2.7.0.rc0.174.g1b62464

Re: [PATCH] rebase -i: remember merge options beyond continue actions

[Junio C Hamano]

On Fri, Dec 11, 2015 at 11:54 AM, Ralf Thielow <ralf.thielow@gmail.com> wrote:
> From: Fabian Ruch <bafain@gmail.com>
>
> If the user specifies a merge strategy or strategy options in
> "rebase --interactive", also use these in subsequent calls of
> "rebase --continue".
>
> In the implementation, the "do_merge" guard to check for a given
> merge strategy or strategy options is implied by passing these
> options, but not stored.  This prevents subsequent calls of
> "rebase --continue" to use this setting again later.  Remove this
> "do_merge" guard to allow a later usage.
>
> Reported-by: Diogo de Campos <campos@esss.com.br>
> Signed-off-by: Fabian Ruch <bafain@gmail.com>
> Helped-by: Michael Haggerty <mhagger@alum.mit.edu>
> Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
> ---
> I've been applying the original patch for a long time to my tree,
> as it helps me to resolve conflicts e.g. when rebasing .po files.
> I also think it's a reasonable change for git-rebase.
>
> I've rebased it agains the current master and rewrote the
> commit message to try to make this change technically a bit more
> easy to understand.

Thanks. I wonder if Michael's rephrasing in $gmane/251386 still applies, which
I found by far the most readable.

http://thread.gmane.org/gmane.comp.version-control.git/251147/focus=251386



>
> Original patch submit:
> http://thread.gmane.org/gmane.comp.version-control.git/251147/
>
>  git-rebase--interactive.sh    | 18 +++++++-----------
>  t/t3404-rebase-interactive.sh | 16 ++++++++++++++++
>  2 files changed, 23 insertions(+), 11 deletions(-)
>
> diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
> index b938a6d..c0cfe88 100644
> --- a/git-rebase--interactive.sh
> +++ b/git-rebase--interactive.sh
> @@ -81,17 +81,13 @@ rewritten_pending="$state_dir"/rewritten-pending
>  # and leaves CR at the end instead.
>  cr=$(printf "\015")
>
> -strategy_args=
> -if test -n "$do_merge"
> -then
> -       strategy_args=${strategy:+--strategy=$strategy}
> -       eval '
> -               for strategy_opt in '"$strategy_opts"'
> -               do
> -                       strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
> -               done
> -       '
> -fi
> +strategy_args=${strategy:+--strategy=$strategy}
> +eval '
> +       for strategy_opt in '"$strategy_opts"'
> +       do
> +               strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
> +       done
> +'
>
>  GIT_CHERRY_PICK_HELP="$resolvemsg"
>  export GIT_CHERRY_PICK_HELP
> diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
> index 98eb49a..9a2461c 100755
> --- a/t/t3404-rebase-interactive.sh
> +++ b/t/t3404-rebase-interactive.sh
> @@ -1006,6 +1006,22 @@ test_expect_success 'rebase -i with --strategy and -X' '
>         test $(cat file1) = Z
>  '
>
> +test_expect_success 'interrupted rebase -i with --strategy and -X' '
> +       git checkout -b conflict-merge-use-theirs-interrupted conflict-branch &&
> +       git reset --hard HEAD^ &&
> +       >breakpoint &&
> +       git add breakpoint &&
> +       git commit -m "breakpoint for interactive mode" &&
> +       echo five >conflict &&
> +       echo Z >file1 &&
> +       git commit -a -m "one file conflict" &&
> +       set_fake_editor &&
> +       FAKE_LINES="edit 1 2" git rebase -i --strategy=recursive -Xours conflict-branch &&
> +       git rebase --continue &&
> +       test $(git show conflict-branch:conflict) = $(cat conflict) &&
> +       test $(cat file1) = Z
> +'
> +
>  test_expect_success 'rebase -i error on commits with \ in message' '
>         current_head=$(git rev-parse HEAD) &&
>         test_when_finished "git rebase --abort; git reset --hard $current_head; rm -f error" &&
> --
> 2.7.0.rc0.174.g1b62464
>
> --
> To unsubscribe from this list: send the line "unsubscribe git" in
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> More majordomo info at  http://vger.kernel.org/majordomo-info.html

[PATCH v2] rebase -i: remember merge options beyond continue actions

[Ralf Thielow]

From: Fabian Ruch <bafain@gmail.com>

If the user explicitly specified a merge strategy or strategy
options, continue to use that strategy/option after
"rebase --continue".  Add a test of the corrected behavior.

If --merge is specified or implied by -s or -X, then "strategy and
"strategy_opts" are set to values from which "strategy_args" can be
derived; otherwise they are set to empty strings.  Either way,
their values are propagated from one step of an interactive rebase
to the next via state files.

"do_merge", on the other hand, is *not* propagated to later steps of
an interactive rebase.  Therefore, making the initialization of
"strategy_args" conditional on "do_merge" being set prevents later
steps of an interactive rebase from setting it correctly.

Luckily, we don't need the "do_merge" guard at all.  If the rebase
was started without --merge, then "strategy" and "strategy_opts"
are both the empty string, which results in "strategy_args" also
being set to the empty string, which is just what we want in that
situation.  So remove the "do_merge" guard and derive
"strategy_args" from "strategy" and "strategy_opts" every time.

Reported-by: Diogo de Campos <campos@esss.com.br>
Signed-off-by: Fabian Ruch <bafain@gmail.com>
Helped-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
---
2015-12-11 21:07 GMT+01:00 Junio C Hamano <gitster@pobox.com>:
> On Fri, Dec 11, 2015 at 11:54 AM, Ralf Thielow <ralf.thielow@gmail.com> wrote:

>
> Thanks. I wonder if Michael's rephrasing in $gmane/251386 still applies, which
> I found by far the most readable.
>
> http://thread.gmane.org/gmane.comp.version-control.git/251147/focus=251386
>

Sure.

 git-rebase--interactive.sh    | 18 +++++++-----------
 t/t3404-rebase-interactive.sh | 16 ++++++++++++++++
 2 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index b938a6d..c0cfe88 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -81,17 +81,13 @@ rewritten_pending="$state_dir"/rewritten-pending
 # and leaves CR at the end instead.
 cr=$(printf "\015")
 
-strategy_args=
-if test -n "$do_merge"
-then
-	strategy_args=${strategy:+--strategy=$strategy}
-	eval '
-		for strategy_opt in '"$strategy_opts"'
-		do
-			strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
-		done
-	'
-fi
+strategy_args=${strategy:+--strategy=$strategy}
+eval '
+	for strategy_opt in '"$strategy_opts"'
+	do
+		strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")"
+	done
+'
 
 GIT_CHERRY_PICK_HELP="$resolvemsg"
 export GIT_CHERRY_PICK_HELP
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index 98eb49a..9a2461c 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -1006,6 +1006,22 @@ test_expect_success 'rebase -i with --strategy and -X' '
 	test $(cat file1) = Z
 '
 
+test_expect_success 'interrupted rebase -i with --strategy and -X' '
+	git checkout -b conflict-merge-use-theirs-interrupted conflict-branch &&
+	git reset --hard HEAD^ &&
+	>breakpoint &&
+	git add breakpoint &&
+	git commit -m "breakpoint for interactive mode" &&
+	echo five >conflict &&
+	echo Z >file1 &&
+	git commit -a -m "one file conflict" &&
+	set_fake_editor &&
+	FAKE_LINES="edit 1 2" git rebase -i --strategy=recursive -Xours conflict-branch &&
+	git rebase --continue &&
+	test $(git show conflict-branch:conflict) = $(cat conflict) &&
+	test $(cat file1) = Z
+'
+
 test_expect_success 'rebase -i error on commits with \ in message' '
 	current_head=$(git rev-parse HEAD) &&
 	test_when_finished "git rebase --abort; git reset --hard $current_head; rm -f error" &&
-- 
2.7.0.rc0.174.g1b62464