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From: "Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Johannes Schindelin <johannes.schindelin@gmx.de>,
	Junio C Hamano <gitster@pobox.com>,
	Johannes Schindelin <johannes.schindelin@gmx.de>
Subject: [PATCH 7/8] built-in add -i: re-implement the `diff` command
Date: Fri, 15 Nov 2019 12:36:21 +0000
Message-ID: <499f3f19e026a60e050f2ed1bb2d820febc6b0a0.1573821382.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.171.git.1573821382.gitgitgadget@gmail.com>

From: Johannes Schindelin <johannes.schindelin@gmx.de>

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>
---
 add-interactive.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/add-interactive.c b/add-interactive.c
index fb8124fc57..f33075b202 100644
--- a/add-interactive.c
+++ b/add-interactive.c
@@ -927,6 +927,47 @@ 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)
@@ -1025,6 +1066,7 @@ 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;
-- 
gitgitgadget


  parent reply index

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-15 12:36 [PATCH 0/8] build-in add -i: implement all commands in the main loop Johannes Schindelin via GitGitGadget
2019-11-15 12:36 ` [PATCH 1/8] built-in add -i: allow filtering the modified files list Johannes Schindelin via GitGitGadget
2019-11-21  8:06   ` Junio C Hamano
2019-11-25 15:20     ` Johannes Schindelin
2019-11-15 12:36 ` [PATCH 2/8] built-in add -i: prepare for multi-selection commands Johannes Schindelin via GitGitGadget
2019-11-21  8:12   ` Junio C Hamano
2019-11-25 15:21     ` Johannes Schindelin
2019-11-15 12:36 ` [PATCH 3/8] built-in add -i: implement the `update` command Johannes Schindelin via GitGitGadget
2019-11-15 12:36 ` [PATCH 4/8] built-in add -i: re-implement `revert` in C Johannes Schindelin via GitGitGadget
2019-11-15 12:36 ` [PATCH 5/8] built-in add -i: re-implement `add-untracked` " Johannes Schindelin via GitGitGadget
2019-11-15 12:36 ` [PATCH 6/8] built-in add -i: implement the `patch` command Johannes Schindelin via GitGitGadget
2019-11-15 12:36 ` Johannes Schindelin via GitGitGadget [this message]
2019-11-15 12:36 ` [PATCH 8/8] built-in add -i: offer the `quit` command Johannes Schindelin via GitGitGadget
2019-11-18  2:17 ` [PATCH 0/8] build-in add -i: implement all commands in the main loop Junio C Hamano
2019-11-18  2:22   ` Junio C Hamano
2019-11-18 19:22     ` Johannes Schindelin
2019-11-18  2:27 ` Junio C Hamano
2019-11-18 18:53   ` Johannes Schindelin
2019-11-19  1:29     ` Junio C Hamano
2019-11-29 21:11 ` [PATCH v2 0/9] built-in " Johannes Schindelin via GitGitGadget
2019-11-29 21:11   ` [PATCH v2 1/9] add-interactive: make sure to release `rev.prune_data` Johannes Schindelin via GitGitGadget
2019-11-29 21:11   ` [PATCH v2 2/9] built-in add -i: allow filtering the modified files list Johannes Schindelin via GitGitGadget
2019-11-29 21:11   ` [PATCH v2 3/9] built-in add -i: prepare for multi-selection commands Johannes Schindelin via GitGitGadget
2019-11-29 21:11   ` [PATCH v2 4/9] built-in add -i: implement the `update` command Johannes Schindelin via GitGitGadget
2019-11-29 21:11   ` [PATCH v2 5/9] built-in add -i: re-implement `revert` in C Johannes Schindelin via GitGitGadget
2019-11-29 21:11   ` [PATCH v2 6/9] built-in add -i: re-implement `add-untracked` " Johannes Schindelin via GitGitGadget
2019-11-29 21:11   ` [PATCH v2 7/9] built-in add -i: implement the `patch` command Johannes Schindelin via GitGitGadget
2019-11-29 21:11   ` [PATCH v2 8/9] built-in add -i: re-implement the `diff` command Johannes Schindelin via GitGitGadget
2019-11-29 21:11   ` [PATCH v2 9/9] built-in add -i: offer the `quit` command Johannes Schindelin via GitGitGadget

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