From: Brandon Williams <bmwill@google.com>
To: Stefan Beller <sbeller@google.com>
Cc: gitster@pobox.com, git@vger.kernel.org, novalis@novalis.org,
sandals@crustytoothpaste.net, hvoigt@hvoigt.net,
jrnieder@gmail.com, ramsay@ramsayjones.plus.com
Subject: Re: [PATCH 12/17] update submodules: add submodule_move_head
Date: Thu, 9 Mar 2017 15:37:09 -0800 [thread overview]
Message-ID: <20170309233709.GD52558@google.com> (raw)
In-Reply-To: <20170309221543.15897-13-sbeller@google.com>
On 03/09, Stefan Beller wrote:
> In later patches we introduce the options and flag for commands
> that modify the working directory, e.g. git-checkout.
>
> This piece of code will be used universally for
> all these working tree modifications as it
> * supports dry run to answer the question:
> "Is it safe to change the submodule to this new state?"
> e.g. is it overwriting untracked files or are there local
> changes that would be overwritten?
> * supports a force flag that can be used for resetting
> the tree.
>
> Signed-off-by: Stefan Beller <sbeller@google.com>
> ---
> submodule.c | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> submodule.h | 7 ++++
> 2 files changed, 142 insertions(+)
>
> diff --git a/submodule.c b/submodule.c
> index 0b2596e88a..bc5fecf8c5 100644
> --- a/submodule.c
> +++ b/submodule.c
> @@ -1239,6 +1239,141 @@ int bad_to_remove_submodule(const char *path, unsigned flags)
> return ret;
> }
>
> +static int submodule_has_dirty_index(const struct submodule *sub)
> +{
> + struct child_process cp = CHILD_PROCESS_INIT;
> +
> + prepare_submodule_repo_env_no_git_dir(&cp.env_array);
> +
> + cp.git_cmd = 1;
> + argv_array_pushl(&cp.args, "diff-index", "--quiet", \
> + "--cached", "HEAD", NULL);
The formatting of this line is a little odd. Also you can drop the
backslash.
Mostly because I haven't dug too deep yet/can't remember: Does
diff-index do the correct thing with nested submodules? If I remember
correctly it does so this shouldn't be a problem.
> + cp.no_stdin = 1;
> + cp.no_stdout = 1;
> + cp.dir = sub->path;
> + if (start_command(&cp))
> + die("could not recurse into submodule '%s'", sub->path);
> +
> + return finish_command(&cp);
> +}
> +
> +static void submodule_reset_index(const char *path)
> +{
> + struct child_process cp = CHILD_PROCESS_INIT;
> + prepare_submodule_repo_env_no_git_dir(&cp.env_array);
> +
> + cp.git_cmd = 1;
> + cp.no_stdin = 1;
> + cp.dir = path;
> +
> + argv_array_pushf(&cp.args, "--super-prefix=%s/", path);
> + argv_array_pushl(&cp.args, "read-tree", "-u", "--reset", NULL);
> +
> + argv_array_push(&cp.args, EMPTY_TREE_SHA1_HEX);
> +
> + if (run_command(&cp))
> + die("could not reset submodule index");
> +}
> +
> +/**
> + * Moves a submodule at a given path from a given head to another new head.
> + * For edge cases (a submodule coming into existence or removing a submodule)
> + * pass NULL for old or new respectively.
> + */
> +int submodule_move_head(const char *path,
> + const char *old,
> + const char *new,
> + unsigned flags)
> +{
> + int ret = 0;
> + struct child_process cp = CHILD_PROCESS_INIT;
> + const struct submodule *sub;
> +
> + sub = submodule_from_path(null_sha1, path);
> +
> + if (!sub)
> + die("BUG: could not get submodule information for '%s'", path);
> +
> + if (old && !(flags & SUBMODULE_MOVE_HEAD_FORCE)) {
> + /* Check if the submodule has a dirty index. */
> + if (submodule_has_dirty_index(sub))
> + return error(_("submodule '%s' has dirty index"), path);
> + }
> +
> + if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
> + if (old) {
> + if (!submodule_uses_gitfile(path))
> + absorb_git_dir_into_superproject("", path,
> + ABSORB_GITDIR_RECURSE_SUBMODULES);
> + } else {
> + struct strbuf sb = STRBUF_INIT;
> + strbuf_addf(&sb, "%s/modules/%s",
> + get_git_common_dir(), sub->name);
> + connect_work_tree_and_git_dir(path, sb.buf);
> + strbuf_release(&sb);
> +
> + /* make sure the index is clean as well */
> + submodule_reset_index(path);
> + }
> + }
> +
> + prepare_submodule_repo_env_no_git_dir(&cp.env_array);
> +
> + cp.git_cmd = 1;
> + cp.no_stdin = 1;
> + cp.dir = path;
> +
> + argv_array_pushf(&cp.args, "--super-prefix=%s/", path);
> + argv_array_pushl(&cp.args, "read-tree", NULL);
> +
> + if (flags & SUBMODULE_MOVE_HEAD_DRY_RUN)
> + argv_array_push(&cp.args, "-n");
> + else
> + argv_array_push(&cp.args, "-u");
> +
> + if (flags & SUBMODULE_MOVE_HEAD_FORCE)
> + argv_array_push(&cp.args, "--reset");
> + else
> + argv_array_push(&cp.args, "-m");
> +
> + argv_array_push(&cp.args, old ? old : EMPTY_TREE_SHA1_HEX);
> + argv_array_push(&cp.args, new ? new : EMPTY_TREE_SHA1_HEX);
> +
> + if (run_command(&cp)) {
> + ret = -1;
> + goto out;
> + }
> +
> + if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
> + if (new) {
> + struct child_process cp1 = CHILD_PROCESS_INIT;
> + /* also set the HEAD accordingly */
> + cp1.git_cmd = 1;
> + cp1.no_stdin = 1;
> + cp1.dir = path;
> +
> + argv_array_pushl(&cp1.args, "update-ref", "HEAD",
> + new ? new : EMPTY_TREE_SHA1_HEX, NULL);
> +
> + if (run_command(&cp1)) {
> + ret = -1;
> + goto out;
> + }
> + } else {
> + struct strbuf sb = STRBUF_INIT;
> +
> + strbuf_addf(&sb, "%s/.git", path);
> + unlink_or_warn(sb.buf);
> + strbuf_release(&sb);
> +
> + if (is_empty_dir(path))
> + rmdir_or_warn(path);
> + }
> + }
> +out:
> + return ret;
> +}
> +
> static int find_first_merges(struct object_array *result, const char *path,
> struct commit *a, struct commit *b)
> {
> diff --git a/submodule.h b/submodule.h
> index 6f3fe85c7c..4cdf6445f7 100644
> --- a/submodule.h
> +++ b/submodule.h
> @@ -96,6 +96,13 @@ extern int push_unpushed_submodules(struct sha1_array *commits,
> extern void connect_work_tree_and_git_dir(const char *work_tree, const char *git_dir);
> extern int parallel_submodules(void);
>
> +#define SUBMODULE_MOVE_HEAD_DRY_RUN (1<<0)
> +#define SUBMODULE_MOVE_HEAD_FORCE (1<<1)
> +extern int submodule_move_head(const char *path,
> + const char *old,
> + const char *new,
> + unsigned flags);
> +
> /*
> * Prepare the "env_array" parameter of a "struct child_process" for executing
> * a submodule by clearing any repo-specific envirionment variables, but
> --
> 2.12.0.rc1.45.g207f5fbb2b
>
--
Brandon Williams
next prev parent reply other threads:[~2017-03-09 23:37 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170223225735.10994-1-sbeller@google.com/>
2017-03-02 0:47 ` [RFCv6 PATCH 00/18] Checkout aware of Submodules! Stefan Beller
2017-03-02 0:47 ` [PATCH 01/18] lib-submodule-update.sh: reorder create_lib_submodule_repo Stefan Beller
2017-03-02 0:47 ` [PATCH 02/18] lib-submodule-update.sh: do not use ./. as submodule remote Stefan Beller
2017-03-02 0:47 ` [PATCH 03/18] lib-submodule-update: teach test_submodule_content the -C <dir> flag Stefan Beller
2017-03-02 2:11 ` Eric Wong
2017-03-06 20:30 ` Stefan Beller
2017-03-06 20:35 ` Stefan Beller
2017-03-02 0:47 ` [PATCH 04/18] lib-submodule-update.sh: replace sha1 by hash Stefan Beller
2017-03-02 0:47 ` [PATCH 05/18] lib-submodule-update.sh: define tests for recursing into submodules Stefan Beller
2017-03-02 0:47 ` [PATCH 06/18] make is_submodule_populated gently Stefan Beller
2017-03-02 0:47 ` [PATCH 07/18] connect_work_tree_and_git_dir: safely create leading directories Stefan Beller
2017-03-02 0:47 ` [PATCH 08/18] update submodules: add submodule config parsing Stefan Beller
2017-03-02 0:47 ` [PATCH 09/18] update submodules: add a config option to determine if submodules are updated Stefan Beller
2017-03-02 0:47 ` [PATCH 10/18] submodules: introduce check to see whether to touch a submodule Stefan Beller
2017-03-02 0:47 ` [PATCH 11/18] update submodules: move up prepare_submodule_repo_env Stefan Beller
2017-03-02 0:47 ` [PATCH 12/18] update submodules: add submodule_move_head Stefan Beller
2017-03-02 0:47 ` [PATCH 13/18] unpack-trees: pass old oid to verify_clean_submodule Stefan Beller
2017-03-02 0:47 ` [PATCH 14/18] unpack-trees: check if we can perform the operation for submodules Stefan Beller
2017-03-02 0:47 ` [PATCH 15/18] read-cache, remove_marked_cache_entries: wipe selected submodules Stefan Beller
2017-03-02 0:47 ` [PATCH 16/18] entry.c: update submodules when interesting Stefan Beller
2017-03-02 0:47 ` [PATCH 17/18] builtin/checkout: add --recurse-submodules switch Stefan Beller
2017-03-02 0:47 ` [PATCH 18/18] builtin/read-tree: " Stefan Beller
2017-03-06 20:59 ` [RFCv7 PATCH 00/18] Checkout aware of Submodules! Stefan Beller
2017-03-06 20:59 ` [PATCH 01/18] lib-submodule-update.sh: reorder create_lib_submodule_repo Stefan Beller
2017-03-06 20:59 ` [PATCH 02/18] lib-submodule-update.sh: do not use ./. as submodule remote Stefan Beller
2017-03-06 20:59 ` [PATCH 03/18] lib-submodule-update: teach test_submodule_content the -C <dir> flag Stefan Beller
2017-03-06 22:21 ` Junio C Hamano
2017-03-06 20:59 ` [PATCH 04/18] lib-submodule-update.sh: replace sha1 by hash Stefan Beller
2017-03-06 20:59 ` [PATCH 05/18] lib-submodule-update.sh: define tests for recursing into submodules Stefan Beller
2017-03-07 22:26 ` Junio C Hamano
2017-03-06 20:59 ` [PATCH 06/18] make is_submodule_populated gently Stefan Beller
2017-03-06 20:59 ` [PATCH 07/18] connect_work_tree_and_git_dir: safely create leading directories Stefan Beller
2017-03-06 20:59 ` [PATCH 08/18] update submodules: add submodule config parsing Stefan Beller
2017-03-06 20:59 ` [PATCH 09/18] update submodules: add a config option to determine if submodules are updated Stefan Beller
2017-03-06 20:59 ` [PATCH 10/18] submodules: introduce check to see whether to touch a submodule Stefan Beller
2017-03-06 20:59 ` [PATCH 11/18] update submodules: move up prepare_submodule_repo_env Stefan Beller
2017-03-06 20:59 ` [PATCH 12/18] update submodules: add submodule_move_head Stefan Beller
2017-03-06 20:59 ` [PATCH 13/18] unpack-trees: pass old oid to verify_clean_submodule Stefan Beller
2017-03-06 20:59 ` [PATCH 14/18] unpack-trees: check if we can perform the operation for submodules Stefan Beller
2017-03-06 20:59 ` [PATCH 15/18] read-cache, remove_marked_cache_entries: wipe selected submodules Stefan Beller
2017-03-07 22:42 ` Junio C Hamano
2017-03-07 23:37 ` Stefan Beller
2017-03-08 1:14 ` Junio C Hamano
2017-03-08 22:39 ` Stefan Beller
2017-03-08 23:37 ` Junio C Hamano
2017-03-06 20:59 ` [PATCH 16/18] entry.c: update submodules when interesting Stefan Beller
2017-03-07 22:42 ` Junio C Hamano
2017-03-07 23:04 ` Junio C Hamano
2017-03-07 23:08 ` Stefan Beller
2017-03-08 1:08 ` Junio C Hamano
2017-03-06 20:59 ` [PATCH 17/18] builtin/checkout: add --recurse-submodules switch Stefan Beller
2017-03-06 20:59 ` [PATCH 18/18] builtin/read-tree: " Stefan Beller
2017-03-07 22:42 ` Junio C Hamano
2017-03-09 22:15 ` [RFCv8 PATCH 00/17] Checkout aware of Submodules! Stefan Beller
2017-03-09 22:15 ` [PATCH 01/17] lib-submodule-update.sh: reorder create_lib_submodule_repo Stefan Beller
2017-03-09 22:15 ` [PATCH 02/17] lib-submodule-update.sh: do not use ./. as submodule remote Stefan Beller
2017-03-09 22:15 ` [PATCH 03/17] lib-submodule-update: teach test_submodule_content the -C <dir> flag Stefan Beller
2017-03-09 22:15 ` [PATCH 04/17] lib-submodule-update.sh: replace sha1 by hash Stefan Beller
2017-03-09 22:15 ` [PATCH 05/17] lib-submodule-update.sh: define tests for recursing into submodules Stefan Beller
2017-03-09 22:15 ` [PATCH 06/17] make is_submodule_populated gently Stefan Beller
2017-03-09 22:15 ` [PATCH 07/17] connect_work_tree_and_git_dir: safely create leading directories Stefan Beller
2017-03-09 23:29 ` Brandon Williams
2017-03-12 7:06 ` Junio C Hamano
2017-03-09 22:15 ` [PATCH 08/17] update submodules: add submodule config parsing Stefan Beller
2017-03-09 22:15 ` [PATCH 09/17] update submodules: add a config option to determine if submodules are updated Stefan Beller
2017-03-09 22:15 ` [PATCH 10/17] submodules: introduce check to see whether to touch a submodule Stefan Beller
2017-03-09 22:15 ` [PATCH 11/17] update submodules: move up prepare_submodule_repo_env Stefan Beller
2017-03-09 22:15 ` [PATCH 12/17] update submodules: add submodule_move_head Stefan Beller
2017-03-09 23:37 ` Brandon Williams [this message]
2017-03-12 7:09 ` Junio C Hamano
2017-03-13 17:24 ` Brandon Williams
2017-03-13 20:50 ` Stefan Beller
2017-03-09 23:40 ` Brandon Williams
2017-03-09 23:43 ` Brandon Williams
2017-03-09 22:15 ` [PATCH 13/17] unpack-trees: pass old oid to verify_clean_submodule Stefan Beller
2017-03-09 22:15 ` [PATCH 14/17] unpack-trees: check if we can perform the operation for submodules Stefan Beller
2017-03-09 22:15 ` [PATCH 15/17] entry.c: create submodules when interesting Stefan Beller
2017-03-09 22:15 ` [PATCH 16/17] builtin/checkout: add --recurse-submodules switch Stefan Beller
2017-03-09 22:15 ` [PATCH 17/17] builtin/read-tree: " Stefan Beller
2017-03-14 21:46 ` [PATCHv9 00/19] Checkout aware of Submodules! Stefan Beller
2017-03-14 21:46 ` [PATCH 01/19] connect_work_tree_and_git_dir: safely create leading directories Stefan Beller
2017-03-14 21:46 ` [PATCH 02/19] submodule--helper.c: remove duplicate code Stefan Beller
2017-03-14 21:46 ` [PATCH 03/19] lib-submodule-update.sh: reorder create_lib_submodule_repo Stefan Beller
2017-03-14 21:46 ` [PATCH 04/19] lib-submodule-update.sh: do not use ./. as submodule remote Stefan Beller
2017-03-14 21:46 ` [PATCH 05/19] lib-submodule-update: teach test_submodule_content the -C <dir> flag Stefan Beller
2017-03-14 21:46 ` [PATCH 06/19] lib-submodule-update.sh: replace sha1 by hash Stefan Beller
2017-03-14 21:46 ` [PATCH 07/19] lib-submodule-update.sh: define tests for recursing into submodules Stefan Beller
2017-03-14 21:46 ` [PATCH 08/19] make is_submodule_populated gently Stefan Beller
2017-03-14 21:46 ` [PATCH 09/19] update submodules: add submodule config parsing Stefan Beller
2017-03-14 21:46 ` [PATCH 10/19] update submodules: add a config option to determine if submodules are updated Stefan Beller
2017-03-14 21:46 ` [PATCH 11/19] submodules: introduce check to see whether to touch a submodule Stefan Beller
2017-03-14 21:46 ` [PATCH 12/19] update submodules: move up prepare_submodule_repo_env Stefan Beller
2017-03-14 21:46 ` [PATCH 13/19] submodule.c: get_super_prefix_or_empty Stefan Beller
2017-03-14 21:46 ` [PATCH 14/19] update submodules: add submodule_move_head Stefan Beller
2017-03-14 21:46 ` [PATCH 15/19] unpack-trees: pass old oid to verify_clean_submodule Stefan Beller
2017-03-14 21:46 ` [PATCH 16/19] unpack-trees: check if we can perform the operation for submodules Stefan Beller
2017-03-14 21:46 ` [PATCH 17/19] entry.c: create submodules when interesting Stefan Beller
2017-03-14 21:46 ` [PATCH 18/19] builtin/checkout: add --recurse-submodules switch Stefan Beller
2017-03-14 21:46 ` [PATCH 19/19] builtin/read-tree: " Stefan Beller
2017-03-15 0:41 ` [PATCHv9 00/19] Checkout aware of Submodules! Brandon Williams
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