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[v6,7/9] built-in add -i: support `?` (prompt help)

Message ID bdf9058d9e71ac279a630234efd333c3c082cc96.1573648866.git.gitgitgadget@gmail.com (mailing list archive)
State New, archived
Headers show
Series git add -i: add a rudimentary version in C (supporting only status and help so far) | expand

Commit Message

Linus Arver via GitGitGadget Nov. 13, 2019, 12:41 p.m. UTC 
From: Johannes Schindelin <johannes.schindelin@gmx.de>

With this change, we print out the same colored help text that the
Perl-based `git add -i` prints in the main loop when question mark is
entered.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 add-interactive.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)
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Patch

diff --git a/add-interactive.c b/add-interactive.c
index 7b6bcf6f8a..8d3829fe68 100644
--- a/add-interactive.c
+++ b/add-interactive.c
@@ -11,6 +11,7 @@  struct add_i_state {
 	struct repository *r;
 	int use_color;
 	char header_color[COLOR_MAXLEN];
+	char help_color[COLOR_MAXLEN];
 };
 
 static void init_color(struct repository *r, struct add_i_state *s,
@@ -43,6 +44,7 @@  static void init_add_i_state(struct add_i_state *s, struct repository *r)
 	s->use_color = want_color(s->use_color);
 
 	init_color(r, s, "header", s->header_color, GIT_COLOR_BOLD);
+	init_color(r, s, "help", s->help_color, GIT_COLOR_BOLD_RED);
 }
 
 /*
@@ -210,6 +212,7 @@  struct list_and_choose_options {
 	struct list_options list_opts;
 
 	const char *prompt;
+	void (*print_help)(struct add_i_state *s);
 };
 
 #define LIST_AND_CHOOSE_ERROR (-1)
@@ -250,6 +253,11 @@  static ssize_t list_and_choose(struct add_i_state *s,
 		if (!input.len)
 			break;
 
+		if (!strcmp(input.buf, "?")) {
+			opts->print_help(s);
+			continue;
+		}
+
 		p = input.buf;
 		for (;;) {
 			size_t sep = strcspn(p, " \t\r\n,");
@@ -514,12 +522,24 @@  static void print_command_item(int i, struct string_list_item *item,
 		       item->string + util->prefix_length);
 }
 
+static void command_prompt_help(struct add_i_state *s)
+{
+	const char *help_color = s->help_color;
+	color_fprintf_ln(stdout, help_color, "%s", _("Prompt help:"));
+	color_fprintf_ln(stdout, help_color, "1          - %s",
+			 _("select a numbered item"));
+	color_fprintf_ln(stdout, help_color, "foo        - %s",
+			 _("select item based on unique prefix"));
+	color_fprintf_ln(stdout, help_color, "           - %s",
+			 _("(empty) select nothing"));
+}
+
 int run_add_i(struct repository *r, const struct pathspec *ps)
 {
 	struct add_i_state s = { NULL };
 	struct list_and_choose_options main_loop_opts = {
 		{ 4, N_("*** Commands ***"), print_command_item, NULL },
-		N_("What now")
+		N_("What now"), command_prompt_help
 	};
 	struct {
 		const char *string;