From 7aed2c0565bb1a7b4524f93e35a29770286ea630 Mon Sep 17 00:00:00 2001
From: Phillip Wood <phillip.wood@dunelm.org.uk>
Date: Thu, 23 Feb 2023 20:55:00 +0000
Subject: rebase -i: match whole word in is_command()

When matching an unabbreviated command is_command() only does a prefix
match which means it parses "pickled" as TODO_PICK. parse_insn_line()
does error out because is_command() only advances as far as the end of
"pick" so it looks like the command name is not followed by a space but
the error message is "missing arguments for pick" rather than telling
the user that the "pickled" is not a valid command.

Fix this by ensuring the match is follow by whitespace or the end of the
string as we already do for abbreviated commands. The (*bol = p) at the
end of the condition is a bit cute for my taste but I decided to leave
it be for now. Rather than add new tests the existing tests for bad
commands are adapted to use a bad command name that triggers the prefix
matching bug.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 sequencer.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

(limited to 'sequencer.c')

diff --git a/sequencer.c b/sequencer.c
index f51d403b7d..416412ca33 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2469,12 +2469,11 @@ static int is_command(enum todo_command command, const char **bol)
 {
 	const char *str = todo_command_info[command].str;
 	const char nick = todo_command_info[command].c;
-	const char *p = *bol + 1;
+	const char *p = *bol;
 
-	return skip_prefix(*bol, str, bol) ||
-		((nick && **bol == nick) &&
-		 (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r' || !*p) &&
-		 (*bol = p));
+	return (skip_prefix(p, str, &p) || (nick && *p++ == nick)) &&
+		(*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r' || !*p) &&
+		(*bol = p);
 }
 
 static int parse_insn_line(struct repository *r, struct todo_item *item,
@@ -2503,7 +2502,8 @@ static int parse_insn_line(struct repository *r, struct todo_item *item,
 			break;
 		}
 	if (i >= TODO_COMMENT)
-		return -1;
+		return error(_("invalid command '%.*s'"),
+			     (int)strcspn(bol, " \t\r\n"), bol);
 
 	/* Eat up extra spaces/ tabs before object name */
 	padding = strspn(bol, " \t");
-- 
cgit v1.3


From 666b6e1135c12925efe608c4d5f03234c54e2d0c Mon Sep 17 00:00:00 2001
From: Phillip Wood <phillip.wood@dunelm.org.uk>
Date: Thu, 23 Feb 2023 20:55:01 +0000
Subject: rebase -i: fix parsing of "fixup -C<commit>"

If the user omits the space between "-C" and the commit in a fixup
command then it is parsed as an ordinary fixup and the commit message is
not updated as it should be. Fix this by making the space between "-C"
and "<commit>" optional as it is for the "merge" command.

Note that set_replace_editor() is changed to set $GIT_SEQUENCE_EDITOR
instead of $EDITOR in order to be able to replace the todo list and
reword commits with $FAKE_COMMIT_MESSAGE. This is safe as all the
existing users are using set_replace_editor() to replace the todo list.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 sequencer.c                     |  6 ++----
 t/lib-rebase.sh                 |  8 ++++++--
 t/t3437-rebase-fixup-options.sh | 26 ++++++++++++++++++++++++++
 t/test-lib-functions.sh         |  8 ++++++++
 4 files changed, 42 insertions(+), 6 deletions(-)

(limited to 'sequencer.c')

diff --git a/sequencer.c b/sequencer.c
index 416412ca33..3c34e70872 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2532,12 +2532,10 @@ static int parse_insn_line(struct repository *r, struct todo_item *item,
 	}
 
 	if (item->command == TODO_FIXUP) {
-		if (skip_prefix(bol, "-C", &bol) &&
-		   (*bol == ' ' || *bol == '\t')) {
+		if (skip_prefix(bol, "-C", &bol)) {
 			bol += strspn(bol, " \t");
 			item->flags |= TODO_REPLACE_FIXUP_MSG;
-		} else if (skip_prefix(bol, "-c", &bol) &&
-				  (*bol == ' ' || *bol == '\t')) {
+		} else if (skip_prefix(bol, "-c", &bol)) {
 			bol += strspn(bol, " \t");
 			item->flags |= TODO_EDIT_FIXUP_MSG;
 		}
diff --git a/t/lib-rebase.sh b/t/lib-rebase.sh
index 1d2f0429ae..7ca5b918f0 100644
--- a/t/lib-rebase.sh
+++ b/t/lib-rebase.sh
@@ -211,6 +211,9 @@ check_reworded_commits () {
 # usage: set_replace_editor <file>
 #
 # Replace the todo file with the exact contents of the given file.
+# N.B. sets GIT_SEQUENCE_EDITOR rather than EDITOR so it can be
+# combined with set_fake_editor to reword commits and replace the
+# todo list
 set_replace_editor () {
 	cat >script <<-\EOF &&
 	cat FILENAME >"$1"
@@ -219,6 +222,7 @@ set_replace_editor () {
 	cat "$1"
 	EOF
 
-	sed -e "s/FILENAME/$1/g" <script | write_script fake-editor.sh &&
-	test_set_editor "$(pwd)/fake-editor.sh"
+	sed -e "s/FILENAME/$1/g" script |
+		write_script fake-sequence-editor.sh &&
+	test_set_sequence_editor "$(pwd)/fake-sequence-editor.sh"
 }
diff --git a/t/t3437-rebase-fixup-options.sh b/t/t3437-rebase-fixup-options.sh
index c023fefd68..ef39d80a8b 100755
--- a/t/t3437-rebase-fixup-options.sh
+++ b/t/t3437-rebase-fixup-options.sh
@@ -50,6 +50,7 @@ test_expect_success 'setup' '
 	body
 	EOF
 
+	test_commit initial &&
 	test_commit A A &&
 	test_commit B B &&
 	get_author HEAD >expected-author &&
@@ -208,4 +209,29 @@ test_expect_success 'fixup -C works upon --autosquash with amend!' '
 		actual-squash-message
 '
 
+test_expect_success 'fixup -[Cc]<commit> works' '
+	test_when_finished "test_might_fail git rebase --abort" &&
+	cat >todo <<-\EOF &&
+	pick A
+	fixup -CA1
+	pick B
+	fixup -cA2
+	EOF
+	(
+		set_replace_editor todo &&
+		FAKE_COMMIT_MESSAGE="edited and fixed up" \
+			git rebase -i initial initial
+	) &&
+	git log --pretty=format:%B initial.. >actual &&
+	cat >expect <<-EOF &&
+	edited and fixed up
+	$EMPTY
+	new subject
+	$EMPTY
+	new
+	body
+	EOF
+	test_cmp expect actual
+'
+
 test_done
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 796093a7b3..c249fc8aba 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -32,6 +32,14 @@ test_set_editor () {
 	export EDITOR
 }
 
+# Like test_set_editor but sets GIT_SEQUENCE_EDITOR instead of EDITOR
+test_set_sequence_editor () {
+	FAKE_SEQUENCE_EDITOR="$1"
+	export FAKE_SEQUENCE_EDITOR
+	GIT_SEQUENCE_EDITOR='"$FAKE_SEQUENCE_EDITOR"'
+	export GIT_SEQUENCE_EDITOR
+}
+
 test_decode_color () {
 	awk '
 		function name(n) {
-- 
cgit v1.3