built-in add -i: re-implement the `diff` command
It is not only laziness that we simply spawn `git diff -p --cached` here: this command needs to use the pager, and the pager needs to exit when the diff is done. Currently we do not have any way to make that happen if we run the diff in-process. So let's just spawn. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Johannes Schindelin committed
Nov 29, 2019 at 21:11 UTC
d7633578b5ecf0d75e2793b01aa2e9afe645c186
1 file changed
+42
add-interactive.c
+42
index cba9688bb5..4d7d44a917 100644
--- a/add-interactive.c
+++ b/add-interactive.c
@@ -931,6 +931,47 @@ static int run_patch(struct add_i_state *s, const struct pathspec *ps,
return res;
}
+static int run_diff(struct add_i_state *s, const struct pathspec *ps,
+ struct prefix_item_list *files,
+ struct list_and_choose_options *opts)
+{
+ int res = 0;
+ ssize_t count, i;
+
+ struct object_id oid;
+ int is_initial = !resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &oid,
+ NULL);
+ if (get_modified_files(s->r, INDEX_ONLY, files, ps, NULL, NULL) < 0)
+ return -1;
+
+ if (!files->items.nr) {
+ putchar('\n');
+ return 0;
+ }
+
+ opts->prompt = N_("Review diff");
+ opts->flags = IMMEDIATE;
+ count = list_and_choose(s, files, opts);
+ opts->flags = 0;
+ if (count >= 0) {
+ struct argv_array args = ARGV_ARRAY_INIT;
+
+ argv_array_pushl(&args, "git", "diff", "-p", "--cached",
+ oid_to_hex(!is_initial ? &oid :
+ s->r->hash_algo->empty_tree),
+ "--", NULL);
+ for (i = 0; i < files->items.nr; i++)
+ if (files->selected[i])
+ argv_array_push(&args,
+ files->items.items[i].string);
+ res = run_command_v_opt(args.argv, 0);
+ argv_array_clear(&args);
+ }
+
+ putchar('\n');
+ return res;
+}
+
static int run_help(struct add_i_state *s, const struct pathspec *unused_ps,
struct prefix_item_list *unused_files,
struct list_and_choose_options *unused_opts)
@@ -1029,6 +1070,7 @@ int run_add_i(struct repository *r, const struct pathspec *ps)
{ "revert", run_revert },
{ "add untracked", run_add_untracked },
{ "patch", run_patch },
+ { "diff", run_diff },
{ "help", run_help },
};
struct prefix_item_list commands = PREFIX_ITEM_LIST_INIT;