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List: git
Subject: [PATCH v3 0/6] submodule: remove "--recursive-prefix"
From: Glen Choo <chooglen () google ! com>
Date: 2022-06-30 22:11:41
Message-ID: 20220630221147.45689-1-chooglen () google ! com
[Download RAW message or body]
(resending as v3 because I accidentally included ab/submodule-cleanup in
v2)
Thanks Ævar for the feedback! I've incorporated all of the suggestions,
except breaking up the tests in 1/6 into their own patch - I wasn't
convinced of the value of having prescriptive tests (with
test_expect_failure), and I found it difficult to discuss descriptive tests
(with test_expect_success) without also having the code in the same diff.
FWIW, this version (and the previous one) "git rebase -x 'make test'"
cleanly :)
Note for Junio: this version is based on ab/submodule-cleanup (and so will
future versions).
= Description
This series is a refactor of "git submodule--helper update" that replaces
"--recursive-prefix" with "--super-prefix" (see Background). This was
initially motivated by:
* Junio's suggestion to simplify the code [1] (in response to a memory leak
found by Johannes Schindelin [2]).
* A desire to use the module_list API + get_submodule_displaypath() outside
of builtin/submodule--helper.c (I expect to use this to check out
branches in each submodule).
But it also happens to remove some overly complicated/duplicated code that
was literally converted from shell :)
= Background
When recursing into nested submodules, Git commands keep track of the path
from the superproject to the submodule in order to print a "display path" to
the user, e.g.
Submodule path '../super/sub/nested-sub': checked out 'abcdef'
For historical reasons, "git submodule--helper update" uses
"--recursive-prefix" for this purpose, but it should use "--super-prefix"
instead because:
* That's what every other command uses (not just submodule--helper
subcommands).
* Using the "--super-prefix" helper functions makes the "git
submodule--helper update" code simpler
= Patch organization
* Patch 1/6 makes sure that display paths are only computed using display
path helper functions ([do_]get_submodule_displaypath()) and fixes some
display paths that we never realized were broken.
* Patches 2-3/6 simplify and deduplicate some display path computations.
* Patch 4/6 (authored by Ævar) removes SUPPORT_SUPER_PREFIX where it's not
needed.
* This doesn't affect correctness, but we want to do this eventually, so
do it now to make 5/6 a bit cleaner.
* Patch 5/6 replaces "--recursive-prefix" with "--super-prefix", making
do_get_submodule_displaypath() obsolete.
* GGG outputs an odd diff; I recommend viewing it with "--histogram"
* Patch 6/6 removes do_get_submodule_displaypath().
= Series history
Changes in v3:
* None (resend of v2 because v2 accidentally included
ab/submodule-cleanup)
Changes in v2:
* Rebase onto ab/submodule-cleanup (previously master)
* Cherry pick https://github.com/avar/git/commit/f445c57490d into 4/6
* Style fixes in .c and tests
= Future work
At the end of this series, get_submodule_displaypath() can be moved to
submodule.h, which would make submodule.c:get_super_prefix_or_empty()
obsolete. I have a patch that demonstrates this (CI run: [4]), but I decided
to keep this series more focused on "git submodule--helper update" so that
it's easier to review.
[1] https://lore.kernel.org/git/xmqq35g5xmmv.fsf@gitster.g
[2] https://lore.kernel.org/git/877a45867ae368bf9e053caedcb6cf421e02344d.1655336146.git.gitgitgadget@gmail.com
[3] https://lore.kernel.org/git/patch-v3-02.12-082e015781e-20220622T142012Z-avarab@gmail.com
[4] https://github.com/chooglen/git/actions/runs/2572557584
Glen Choo (5):
submodule--helper update: use display path helper
submodule--helper: don't recreate recursive prefix
submodule--helper: use correct display path helper
submodule--helper update: use --super-prefix
submodule--helper: remove display path helper
Ævar Arnfjörð Bjarmason (1):
submodule--helper: remove unused SUPPORT_SUPER_PREFIX flags
builtin/submodule--helper.c | 87 ++++++++++---------------------------
t/t7406-submodule-update.sh | 56 ++++++++++++++++++++++++
2 files changed, 79 insertions(+), 64 deletions(-)
Range-diff against v1:
1: 473548f2fa ! 1: 64c138df19 submodule--helper update: use display path helper
@@ builtin/submodule--helper.c: static int prepare_to_clone_next_submodule(const \
st
- struct strbuf displaypath_sb = STRBUF_INIT;
struct strbuf sb = STRBUF_INIT;
- const char *displaypath = NULL;
-+ char *displaypath = NULL;
++ char *displaypath;
int needs_cloning = 0;
int need_free_url = 0;
@@ builtin/submodule--helper.c: static int prepare_to_clone_next_submodule(const \
st
- else
- strbuf_addstr(&sb, ce->name);
- strbuf_addf(out, _("Skipping unmerged submodule %s"), sb.buf);
-- strbuf_addch(out, '\n');
-+ strbuf_addf(out, _("Skipping unmerged submodule '%s'\n"), displaypath);
++ strbuf_addf(out, _("Skipping unmerged submodule %s"), displaypath);
+ strbuf_addch(out, '\n');
goto cleanup;
}
@@ t/t7406-submodule-update.sh: test_expect_success 'submodule update --filter \
sets + test_when_finished "rm -fr top-cloned" &&
+ cp -r top-clean top-cloned &&
+
-+ # Create an upstream commit in each repo
++ # Create an upstream commit in each repo, starting with bottom
+ test_commit -C bottom upstream_commit &&
-+ (cd middle &&
-+ git -C bottom fetch &&
-+ git -C bottom checkout -f FETCH_HEAD &&
-+ git add bottom &&
-+ git commit -m "upstream_commit"
-+ ) &&
-+ (cd top &&
-+ git -C middle fetch &&
-+ git -C middle checkout -f FETCH_HEAD &&
-+ git add middle &&
-+ git commit -m "upstream_commit"
-+ ) &&
++ # Create middle commit
++ git -C middle/bottom fetch &&
++ git -C middle/bottom checkout -f FETCH_HEAD &&
++ git -C middle add bottom &&
++ git -C middle commit -m "upstream_commit" &&
++ # Create top commit
++ git -C top/middle fetch &&
++ git -C top/middle checkout -f FETCH_HEAD &&
++ git -C top add middle &&
++ git -C top commit -m "upstream_commit" &&
+
+ # Create a downstream conflict
-+ (cd top-cloned/middle &&
-+ test_commit -C bottom downstream_commit &&
-+ git add bottom &&
-+ git commit -m "downstream_commit" &&
-+ git fetch --recurse-submodules origin &&
-+ test_must_fail git merge origin/main
-+ ) &&
++ test_commit -C top-cloned/middle/bottom downstream_commit &&
++ git -C top-cloned/middle add bottom &&
++ git -C top-cloned/middle commit -m "downstream_commit" &&
++ git -C top-cloned/middle fetch --recurse-submodules origin &&
++ test_must_fail git -C top-cloned/middle merge origin/main &&
++
+ # Make the update of "middle" a no-op, otherwise we error out
+ # because of its unmerged state
+ test_config -C top-cloned submodule.middle.update !true &&
+ git -C top-cloned submodule update --recursive 2>actual.err &&
-+ grep "Skipping unmerged submodule .middle/bottom." actual.err
++ grep -F "Skipping unmerged submodule middle/bottom" actual.err
+'
+
+test_expect_success 'submodule update --recursive skip submodules with \
strategy=none' ' @@ t/t7406-submodule-update.sh: test_expect_success 'submodule \
update --filter sets + test_commit -C top-cloned/middle/bottom downstream_commit &&
+ git -C top-cloned/middle config submodule.bottom.update none &&
+ git -C top-cloned submodule update --recursive 2>actual.err &&
-+ grep "Skipping submodule .middle/bottom." actual.err
++ grep -F "Skipping submodule ${SQ}middle/bottom${SQ}" actual.err
+'
+
test_done
2: 618053730e ! 2: d3e803a463 submodule--helper: don't recreate recursive prefix
@@ Commit message
## builtin/submodule--helper.c ##
@@ builtin/submodule--helper.c: static void update_data_to_args(struct \
update_data *update_data, struct strvec *
- {
+
strvec_pushl(args, "submodule--helper", "update", "--recursive", NULL);
strvec_pushf(args, "--jobs=%d", update_data->max_jobs);
- if (update_data->recursive_prefix)
3: 7cd1c46f35 = 3: 1f7cf6ffaf submodule--helper: use correct display path helper
-: ---------- > 4: 85e65f143b submodule--helper: remove unused SUPPORT_SUPER_PREFIX \
flags
4: 57988287fc ! 5: 1d8b6b244d submodule--helper update: use --super-prefix
@@ builtin/submodule--helper.c: struct submodule_update_clone {
const char *prefix;
- const char *recursive_prefix;
const char *displaypath;
- const char *update_default;
+ enum submodule_update_type update_default;
struct object_id suboid;
@@ builtin/submodule--helper.c: static int prepare_to_clone_next_submodule(const \
struct cache_entry *ce,
@@ builtin/submodule--helper.c: static int prepare_to_clone_next_submodule(const \
st + get_super_prefix());
if (ce_stage(ce)) {
- strbuf_addf(out, _("Skipping unmerged submodule '%s'\n"), displaypath);
-@@ builtin/submodule--helper.c: static void ensure_core_worktree(const char \
*path)
-
- static void update_data_to_args(struct update_data *update_data, struct strvec \
*args) + strbuf_addf(out, _("Skipping unmerged submodule %s"), displaypath);
+@@ builtin/submodule--helper.c: static void update_data_to_args(struct \
update_data *update_data, struct strvec * {
+ enum submodule_update_type update_type = update_data->update_default;
+
- strvec_pushl(args, "submodule--helper", "update", "--recursive", NULL);
- strvec_pushf(args, "--jobs=%d", update_data->max_jobs);
if (update_data->displaypath)
@@ builtin/submodule--helper.c: static int module_update(int argc, const char \
**arg
- N_("path"),
- N_("path into the working tree, across nested "
- "submodule boundaries")),
- OPT_STRING(0, "update", &opt.update_default,
- N_("string"),
- N_("rebase, merge, checkout or none")),
+ OPT_SET_INT(0, "checkout", &opt.update_default,
+ N_("use the 'checkout' update strategy (default)"),
+ SM_UPDATE_CHECKOUT),
@@ builtin/submodule--helper.c: static int module_update(int argc, const char \
**argv, const char *prefix) module_list_active(&list);
@@ builtin/submodule--helper.c: struct cmd_struct {
{"name", module_name, 0},
- {"clone", module_clone, 0},
+ {"clone", module_clone, SUPPORT_SUPER_PREFIX},
- {"add", module_add, SUPPORT_SUPER_PREFIX},
+ {"add", module_add, 0},
- {"update", module_update, 0},
+ {"update", module_update, SUPPORT_SUPER_PREFIX},
{"resolve-relative-url-test", resolve_relative_url_test, 0},
{"foreach", module_foreach, SUPPORT_SUPER_PREFIX},
- {"init", module_init, SUPPORT_SUPER_PREFIX},
+ {"init", module_init, 0},
5: 9fa13380b0 ! 6: a21e8cd174 submodule--helper: remove display path helper
@@ builtin/submodule--helper.c: static int prepare_to_clone_next_submodule(const \
st + get_submodule_displaypath(ce->name, suc->update_data->prefix);
if (ce_stage(ce)) {
- strbuf_addf(out, _("Skipping unmerged submodule '%s'\n"), displaypath);
+ strbuf_addf(out, _("Skipping unmerged submodule %s"), displaypath);
@@ builtin/submodule--helper.c: static int update_submodule(struct update_data \
*update_data) {
ensure_core_worktree(update_data->sm_path);
base-commit: 5b893f7d81eb7feb43662ed8663e2af76a76b4c8
--
2.37.0.rc0.161.g10f37bed90-goog
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