notes: teach the -e option to edit messages in editor

Notes can be added to a commit using:
	- "-m" to provide a message on the command line.
	- -C to copy a note from a blob object.
	- -F to read the note from a file.
When these options are used, Git does not open an editor,
it simply takes the content provided via these options and
attaches it to the commit as a note.

Improve flexibility to fine-tune the note before finalizing it
by allowing the messages to be prefilled in the editor and edited
after the messages have been provided through -[mF].

Signed-off-by: Abraham Samuel Adekunle <abrahamadekunle50@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>

Documentation/git-notes.txt

@@ -9,9 +9,9 @@ SYNOPSIS
 --------
 [verse]
 'git notes' [list [<object>]]
-'git notes' add [-f] [--allow-empty] [--[no-]separator | --separator=<paragraph-break>] [--[no-]stripspace] [-F <file> | -m <msg> | (-c | -C) <object>] [<object>]
+'git notes' add [-f] [--allow-empty] [--[no-]separator | --separator=<paragraph-break>] [--[no-]stripspace] [-F <file> | -m <msg> | (-c | -C) <object>] [-e] [<object>]
 'git notes' copy [-f] ( --stdin | <from-object> [<to-object>] )
-'git notes' append [--allow-empty] [--[no-]separator | --separator=<paragraph-break>] [--[no-]stripspace] [-F <file> | -m <msg> | (-c | -C) <object>] [<object>]
+'git notes' append [--allow-empty] [--[no-]separator | --separator=<paragraph-break>] [--[no-]stripspace] [-F <file> | -m <msg> | (-c | -C) <object>] [-e] [<object>]
 'git notes' edit [--allow-empty] [<object>] [--[no-]stripspace]
 'git notes' show [<object>]
 'git notes' merge [-v | -q] [-s <strategy> ] <notes-ref>
@@ -67,7 +67,9 @@ add::
 	the existing notes will be opened in the editor (like the `edit`
 	subcommand). If you specify multiple `-m` and `-F`, a blank
 	line will be inserted between the messages. Use the `--separator`
-	option to insert other delimiters.
+	option to insert other delimiters. You can use `-e` to edit and
+	fine-tune the message(s) supplied from `-m` and `-F` options
+	interactively (using an editor) before adding the note.
 
 copy::
 	Copy the notes for the first object onto the second object (defaults to
@@ -93,6 +95,8 @@ append::
 	an existing note, a blank line is added before each new
 	message as an inter-paragraph separator.  The separator can
 	be customized with the `--separator` option.
+	Edit the notes to be appended given by `-m` and `-F` options with
+	`-e` interactively (using an editor) before appending the note.
 
 edit::
 	Edit the notes for a given object (defaults to HEAD).

builtin/notes.c

@@ -32,9 +32,9 @@
 static const char *separator = "\n";
 static const char * const git_notes_usage[] = {
 	N_("git notes [--ref <notes-ref>] [list [<object>]]"),
-	N_("git notes [--ref <notes-ref>] add [-f] [--allow-empty] [--[no-]separator|--separator=<paragraph-break>] [--[no-]stripspace] [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]"),
+	N_("git notes [--ref <notes-ref>] add [-f] [--allow-empty] [--[no-]separator|--separator=<paragraph-break>] [--[no-]stripspace] [-m <msg> | -F <file> | (-c | -C) <object>] [<object>] [-e]"),
 	N_("git notes [--ref <notes-ref>] copy [-f] <from-object> <to-object>"),
-	N_("git notes [--ref <notes-ref>] append [--allow-empty] [--[no-]separator|--separator=<paragraph-break>] [--[no-]stripspace] [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]"),
+	N_("git notes [--ref <notes-ref>] append [--allow-empty] [--[no-]separator|--separator=<paragraph-break>] [--[no-]stripspace] [-m <msg> | -F <file> | (-c | -C) <object>] [<object>] [-e]"),
 	N_("git notes [--ref <notes-ref>] edit [--allow-empty] [<object>]"),
 	N_("git notes [--ref <notes-ref>] show [<object>]"),
 	N_("git notes [--ref <notes-ref>] merge [-v | -q] [-s <strategy>] <notes-ref>"),
@@ -489,6 +489,8 @@ static int add(int argc, const char **argv, const char *prefix)
 		OPT_CALLBACK_F('c', "reedit-message", &d, N_("object"),
 			N_("reuse and edit specified note object"), PARSE_OPT_NONEG,
 			parse_reedit_arg),
+		OPT_BOOL('e', "edit", &d.use_editor,
+			N_("edit note message in editor")),
 		OPT_CALLBACK_F('C', "reuse-message", &d, N_("object"),
 			N_("reuse specified note object"), PARSE_OPT_NONEG,
 			parse_reuse_arg),
@@ -667,6 +669,8 @@ static int append_edit(int argc, const char **argv, const char *prefix)
 		OPT_CALLBACK_F('C', "reuse-message", &d, N_("object"),
 			N_("reuse specified note object"), PARSE_OPT_NONEG,
 			parse_reuse_arg),
+		OPT_BOOL('e', "edit", &d.use_editor,
+			N_("edit note message in editor")),
 		OPT_BOOL(0, "allow-empty", &allow_empty,
 			N_("allow storing empty note")),
 		OPT_CALLBACK_F(0, "separator", &separator,

t/t3301-notes.sh

@@ -1567,4 +1567,67 @@ test_expect_success 'empty notes do not invoke the editor' '
 	git notes remove HEAD
 '
 
+test_expect_success 'git notes add with -m/-F invokes editor with -e' '
+	test_commit 19th &&
+	echo "edited" >expect &&
+	MSG="$(cat expect)" git notes add -m "initial" -e &&
+	git notes show >actual &&
+	test_cmp expect actual &&
+	git notes remove HEAD &&
+
+	# Add a note using -F and edit it
+	echo "initial" >note_file &&
+	MSG="$(cat expect)" git notes add -F note_file -e &&
+	git notes show >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'git notes append with -m/-F invokes the editor with -e' '
+	test_commit 20th &&
+	cat >expect <<-EOF &&
+		initial
+
+		edited
+	EOF
+	git notes add -m "initial" &&
+	MSG="edited" git notes append -m "appended" -e &&
+
+	# Verify the note content was appended and edited
+	git notes show >actual &&
+	test_cmp expect actual &&
+	git notes remove HEAD &&
+
+	# Append a note using -F and edit it
+	echo "note from file" >note_file &&
+	git notes add -m "initial" &&
+	MSG="edited" git notes append -F note_file -e &&
+
+	# Verify notes from file has been edited in editor and appended
+	git notes show >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'git notes with a combination of -m, -F and -e invokes editor' '
+	test_commit 21st &&
+	echo "foo-file-1" >note_1 &&
+	echo "foo-file-2" >note_2 &&
+	echo "edited" >expect &&
+
+	MSG=$(cat expect) git notes append -F note_1 -m "message-1" -F note_2 -e &&
+
+	# Verify that combined messages from file and -m have been edited
+	git notes show >actual &&
+	test_cmp expect actual
+'
+test_expect_success 'git notes append aborts when editor fails with -e' '
+	test_commit 22nd &&
+	echo "foo-file-1" >note_1 &&
+
+	# Try to append a note with -F and -e, but make the editor fail
+	test_env GIT_EDITOR="false" test_must_fail git notes append -F note_1 -e &&
+
+	# Verify that no note was added due to editor failure
+	test_must_fail git notes show
+'
+
 test_done