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From: Alban Gruin <alban.gruin@gmail.com>
To: git@vger.kernel.org
Cc: Thomas Gummerer <t.gummerer@gmail.com>,
	Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	Junio C Hamano <gitster@pobox.com>,
	Alban Gruin <alban.gruin@gmail.com>
Subject: [RFC PATCH v1 2/6] stash: remove the second index in stash_working_tree()
Date: Tue,  5 May 2020 12:48:45 +0200
Message-ID: <20200505104849.13602-3-alban.gruin@gmail.com> (raw)
In-Reply-To: <20200505104849.13602-1-alban.gruin@gmail.com>

This removes the second index used in stash_working_tree() to simplify
the code.  It also help to avoid issues with the split-index: when
stash_working_tree() is called, the index is at `i_tree', and this tree
is extracted in a second index for use in a subcommand.  This is not a
problem in the non-split-index case, but in the split-index case, if the
shared index file has expired and is removed by a subcommand, the main
index contains a reference to a file that no longer exists.

The calls to set_alternative_index_output() are dropped to extract
`i_tree' to the main index, and `GIT_INDEX_FILE' is no longer set before
starting `update-index'.  When it exits, the index has changed, and must
be discarded.

The call to reset_tree() becomes useless: the only caller of
stash_working_tree() is do_create_stash(), which creates `i_tree' from
its index, calls save_untracked_files() if requested (but as it also
works on a second index, it is unaffected), then calls
stash_working_tree().  But when save_untracked_files() will be modified
to stop using another index, it won't reset the tree, because
stash_patch() wants to work on a different tree (`b_tree') than
stash_working_tree().

At the end of the function, the tree is reset to `i_tree'.

Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
---
 builtin/stash.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/builtin/stash.c b/builtin/stash.c
index 9baa8b379e..2535335275 100644
--- a/builtin/stash.c
+++ b/builtin/stash.c
@@ -1059,17 +1059,14 @@ static int stash_working_tree(struct stash_info *info, const struct pathspec *ps
 	struct rev_info rev;
 	struct child_process cp_upd_index = CHILD_PROCESS_INIT;
 	struct strbuf diff_output = STRBUF_INIT;
-	struct index_state istate = { NULL };
 
 	init_revisions(&rev, NULL);
 	copy_pathspec(&rev.prune_data, ps);
 
-	set_alternate_index_output(stash_index_path.buf);
 	if (reset_tree(&info->i_tree, 0, 0)) {
 		ret = -1;
 		goto done;
 	}
-	set_alternate_index_output(NULL);
 
 	rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 	rev.diffopt.format_callback = add_diff_to_buf;
@@ -1091,8 +1088,6 @@ static int stash_working_tree(struct stash_info *info, const struct pathspec *ps
 	argv_array_pushl(&cp_upd_index.args, "update-index",
 			 "--ignore-skip-worktree-entries",
 			 "-z", "--add", "--remove", "--stdin", NULL);
-	argv_array_pushf(&cp_upd_index.env_array, "GIT_INDEX_FILE=%s",
-			 stash_index_path.buf);
 
 	if (pipe_command(&cp_upd_index, diff_output.buf, diff_output.len,
 			 NULL, 0, NULL, 0)) {
@@ -1100,19 +1095,16 @@ static int stash_working_tree(struct stash_info *info, const struct pathspec *ps
 		goto done;
 	}
 
-	if (write_index_as_tree(&info->w_tree, &istate, stash_index_path.buf, 0,
-				NULL)) {
+	discard_cache();
+	if (write_cache_as_tree(&info->w_tree, 0, NULL) ||
+	    reset_tree(&info->i_tree, 0, 1))
 		ret = -1;
-		goto done;
-	}
 
 done:
-	discard_index(&istate);
 	UNLEAK(rev);
 	object_array_clear(&rev.pending);
 	clear_pathspec(&rev.prune_data);
 	strbuf_release(&diff_output);
-	remove_path(stash_index_path.buf);
 	return ret;
 }
 
-- 
2.26.2


  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 ` Alban Gruin [this message]
2020-06-13  8:52   ` [RFC PATCH v1 2/6] stash: remove the second index in stash_working_tree() 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     ` [PATCH v3 5/6] stash: remove the second index in restore_untracked() Alban Gruin
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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