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From: Alban Gruin <alban.gruin@gmail.com>
To: git@vger.kernel.org,
	Christian Couder <christian.couder@gmail.com>,
	Junio C Hamano <gitster@pobox.com>
Cc: Thomas Gummerer <t.gummerer@gmail.com>,
	Son Luong Ngoc <sluongng@gmail.com>,
	Alban Gruin <alban.gruin@gmail.com>
Subject: [PATCH v3 5/6] stash: remove the second index in restore_untracked()
Date: Fri, 31 Jul 2020 18:51:39 +0200
Message-ID: <20200731165140.29197-6-alban.gruin@gmail.com> (raw)
In-Reply-To: <20200731165140.29197-1-alban.gruin@gmail.com>

This removes the second index used in restore_untracked().

The call to `read-tree' is replaced by reset_tree() with the appropriate
parameters (no update, no reset).  The environment of `checkout-index'
is no longer modified, and the cache is discarded when it exits.

In do_apply_stash(), the changes are a bit more involved: to avoid
conflicts with the merged index, restore_untracked() is moved after
merge_recursive_generic().

This introduces another problem: the files that were untracked once are
now added to the index, and update_index() would add back those files in
the index.  To avoid this, get_newly_staged() is moved before
restore_untracked().

Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
---
 builtin/stash.c | 47 +++++++++++++++++------------------------------
 1 file changed, 17 insertions(+), 30 deletions(-)

diff --git a/builtin/stash.c b/builtin/stash.c
index cbe37cd24b..d5077a27d9 100644
--- a/builtin/stash.c
+++ b/builtin/stash.c
@@ -359,29 +359,15 @@ static int restore_untracked(struct object_id *u_tree)
 	int res;
 	struct child_process cp = CHILD_PROCESS_INIT;
 
-	/*
-	 * We need to run restore files from a given index, but without
-	 * affecting the current index, so we use GIT_INDEX_FILE with
-	 * run_command to fork processes that will not interfere.
-	 */
-	cp.git_cmd = 1;
-	argv_array_push(&cp.args, "read-tree");
-	argv_array_push(&cp.args, oid_to_hex(u_tree));
-	argv_array_pushf(&cp.env_array, "GIT_INDEX_FILE=%s",
-			 stash_index_path.buf);
-	if (run_command(&cp)) {
-		remove_path(stash_index_path.buf);
+	if (reset_tree(u_tree, 0, 0))
 		return -1;
-	}
 
-	child_process_init(&cp);
 	cp.git_cmd = 1;
 	argv_array_pushl(&cp.args, "checkout-index", "--all", NULL);
-	argv_array_pushf(&cp.env_array, "GIT_INDEX_FILE=%s",
-			 stash_index_path.buf);
 
 	res = run_command(&cp);
-	remove_path(stash_index_path.buf);
+	discard_cache();
+
 	return res;
 }
 
@@ -395,6 +381,7 @@ static int do_apply_stash(const char *prefix, struct stash_info *info,
 	struct object_id index_tree;
 	struct commit *result;
 	const struct object_id *bases[1];
+	struct strbuf newly_staged = STRBUF_INIT;
 
 	read_cache_preload(NULL);
 	if (refresh_and_write_cache(REFRESH_QUIET, 0, 0))
@@ -433,9 +420,6 @@ static int do_apply_stash(const char *prefix, struct stash_info *info,
 		}
 	}
 
-	if (info->has_u && restore_untracked(&info->u_tree))
-		return error(_("could not restore untracked files from stash"));
-
 	init_merge_options(&o, the_repository);
 
 	o.branch1 = "Updated upstream";
@@ -463,24 +447,27 @@ static int do_apply_stash(const char *prefix, struct stash_info *info,
 		return ret;
 	}
 
+	if (!has_index && get_newly_staged(&newly_staged, &c_tree)) {
+		strbuf_release(&newly_staged);
+		return -1;
+	}
+
+	if (info->has_u && restore_untracked(&info->u_tree)) {
+		strbuf_release(&newly_staged);
+		return error(_("could not restore untracked files from stash"));
+	}
+
 	if (has_index) {
 		if (reset_tree(&index_tree, 0, 0))
 			return -1;
 	} else {
-		struct strbuf out = STRBUF_INIT;
-
-		if (get_newly_staged(&out, &c_tree)) {
-			strbuf_release(&out);
-			return -1;
-		}
-
 		if (reset_tree(&c_tree, 0, 1)) {
-			strbuf_release(&out);
+			strbuf_release(&newly_staged);
 			return -1;
 		}
 
-		ret = update_index(&out);
-		strbuf_release(&out);
+		ret = update_index(&newly_staged);
+		strbuf_release(&newly_staged);
 		if (ret)
 			return -1;
 
-- 
2.20.1


  parent reply index

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-05 10:48 [RFC PATCH v1 0/6] stash: drop usage of a second index Alban Gruin
2020-05-05 10:48 ` [RFC PATCH v1 1/6] stash: mark `i_tree' in reset_tree() const Alban Gruin
2020-06-13  8:09   ` Christian Couder
2020-05-05 10:48 ` [RFC PATCH v1 2/6] stash: remove the second index in stash_working_tree() Alban Gruin
2020-06-13  8:52   ` Christian Couder
2020-06-13 18:00     ` Alban Gruin
2020-06-15 12:02       ` Christian Couder
2020-05-05 10:48 ` [RFC PATCH v1 3/6] stash: remove the second index in stash_patch() Alban Gruin
2020-06-13  9:38   ` Christian Couder
2020-06-13 10:04     ` Christian Couder
2020-05-05 10:48 ` [RFC PATCH v1 4/6] stash: remove the second index in save_untracked_files() Alban Gruin
2020-06-13 18:51   ` Christian Couder
2020-05-05 10:48 ` [RFC PATCH v1 5/6] stash: remove the second index in restore_untracked() Alban Gruin
2020-06-13 19:41   ` Christian Couder
2020-05-05 10:48 ` [RFC PATCH v1 6/6] stash: remove `stash_index_path' Alban Gruin
2020-06-04 12:07 ` [RFC PATCH v1 0/6] stash: drop usage of a second index Alban Gruin
2020-06-13  7:52 ` Christian Couder
2020-06-25 12:35   ` Alban Gruin
2020-06-15 15:27 ` SZEDER Gábor
2020-06-15 21:50   ` SZEDER Gábor
2020-06-16  7:06     ` SZEDER Gábor
2020-06-17 20:04       ` Junio C Hamano
2020-06-17 21:31         ` Alban Gruin
2020-06-30 15:15 ` [PATCH v2 " Alban Gruin
2020-06-30 15:15   ` [PATCH v2 1/6] stash: mark `i_tree' in reset_tree() const Alban Gruin
2020-06-30 15:15   ` [PATCH v2 2/6] stash: remove the second index in stash_working_tree() Alban Gruin
2020-06-30 15:15   ` [PATCH v2 3/6] stash: remove the second index in stash_patch() Alban Gruin
2020-06-30 15:15   ` [PATCH v2 4/6] stash: remove the second index in save_untracked_files() Alban Gruin
2020-06-30 15:15   ` [PATCH v2 5/6] stash: remove the second index in restore_untracked() Alban Gruin
2020-07-31 13:45     ` Christian Couder
2020-07-31 16:16       ` Alban Gruin
2020-06-30 15:15   ` [PATCH v2 6/6] stash: remove `stash_index_path' Alban Gruin
2020-07-31 13:53   ` [PATCH v2 0/6] stash: drop usage of a second index Christian Couder
2020-07-31 16:51   ` [PATCH v3 " Alban Gruin
2020-07-31 16:51     ` [PATCH v3 1/6] stash: mark `i_tree' in reset_tree() const Alban Gruin
2020-07-31 18:28       ` Junio C Hamano
2020-07-31 16:51     ` [PATCH v3 2/6] stash: remove the second index in stash_working_tree() Alban Gruin
2020-07-31 18:26       ` Junio C Hamano
2020-08-02  2:20         ` Junio C Hamano
2020-07-31 16:51     ` [PATCH v3 3/6] stash: remove the second index in stash_patch() Alban Gruin
2020-07-31 16:51     ` [PATCH v3 4/6] stash: remove the second index in save_untracked_files() Alban Gruin
2020-07-31 16:51     ` Alban Gruin [this message]
2020-07-31 16:51     ` [PATCH v3 6/6] stash: remove `stash_index_path' Alban Gruin
2020-07-31 17:48     ` [PATCH v3 0/6] stash: drop usage of a second index Junio C Hamano

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