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From: Elijah Newren <newren@gmail.com>
To: Matheus Tavares <matheus.bernardino@usp.br>
Cc: Git Mailing List <git@vger.kernel.org>,
	Junio C Hamano <gitster@pobox.com>,
	Derrick Stolee <stolee@gmail.com>,
	Jonathan Tan <jonathantanmy@google.com>,
	Jeff King <peff@peff.net>, Jonathan Nieder <jrnieder@gmail.com>
Subject: Re: [PATCH v4 4/6] config: correctly read worktree configs in submodules
Date: Tue, 16 Jun 2020 12:13:30 -0700
Message-ID: <CABPp-BGdEyEeajYZj_rdxp=MyEQdszuyjVTax=hhYj3fOtRQUQ@mail.gmail.com> (raw)
In-Reply-To: <6402c968077900d48d189551a652e10984437a9f.1591974940.git.matheus.bernardino@usp.br>

Hi,

On Fri, Jun 12, 2020 at 8:45 AM Matheus Tavares
<matheus.bernardino@usp.br> wrote:
>
> One of the steps in do_git_config_sequence() is to load the
> worktree-specific config file. Although the function receives a git_dir
> string, it relies on git_pathdup(), which uses the_repository->git_dir,
> to make the path to the file. Furthermore, it also checks that
> extensions.worktreeConfig is set through the
> repository_format_worktree_config variable, which refers to
> the_repository only. Thus, when a submodule has worktree-specific
> settings, a command executed in the superproject that recurses into the
> submodule won't find the said settings.
>
> This will be especially important in the next patch: git-grep will learn
> to honor sparse checkouts and, when running with --recurse-submodules,
> the submodule's sparse checkout settings must be loaded. As these
> settings are stored in the config.worktree file, they would be ignored
> without this patch. So let's fix this by reading the right
> config.worktree file and extensions.worktreeConfig setting, based on the
> git_dir and commondir paths given to do_git_config_sequence(). Also
> add a test to avoid any regressions.

Thanks for splitting this part of the change out from the previous patch.

>
> Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
> ---
>  config.c                   | 21 +++++++++---
>  t/helper/test-config.c     | 67 +++++++++++++++++++++++++++++++++-----
>  t/t2404-worktree-config.sh | 16 +++++++++
>  3 files changed, 91 insertions(+), 13 deletions(-)
>
> diff --git a/config.c b/config.c
> index 8db9c77098..c2d56309dc 100644
> --- a/config.c
> +++ b/config.c
> @@ -1747,11 +1747,22 @@ static int do_git_config_sequence(const struct config_options *opts,
>                 ret += git_config_from_file(fn, repo_config, data);
>
>         current_parsing_scope = CONFIG_SCOPE_WORKTREE;
> -       if (!opts->ignore_worktree && repository_format_worktree_config) {
> -               char *path = git_pathdup("config.worktree");
> -               if (!access_or_die(path, R_OK, 0))
> -                       ret += git_config_from_file(fn, path, data);
> -               free(path);
> +       if (!opts->ignore_worktree && repo_config && opts->git_dir) {

What happens when opts->git_dir is NULL?  (Does that ever even
happen?)  Should it fall back to the old code path in that case?

> +               struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT;
> +               struct strbuf buf = STRBUF_INIT;
> +
> +               read_repository_format(&repo_fmt, repo_config);
> +
> +               if (!verify_repository_format(&repo_fmt, &buf) &&
> +                   repo_fmt.worktree_config) {
> +                       char *path = mkpathdup("%s/config.worktree", opts->git_dir);
> +                       if (!access_or_die(path, R_OK, 0))
> +                               ret += git_config_from_file(fn, path, data);
> +                       free(path);
> +               }
> +
> +               strbuf_release(&buf);
> +               clear_repository_format(&repo_fmt);

I've tried to poke around a little at this block, but as with the
previous series, I still feel like it should be reviewed by someone
who knows submodules and/or config handling better.  That's easier now
that the patch has been split up.  Unfortunately, trying to figure out
who the submodule expert(s) are (looking at authors of
submodule*.[ch]) seems to lead me to a who's who of people who are no
longer active in the project.  :-(  Maybe Peff or jrnieder would have
suggestions; cc'ing them.

>         }
>
>         current_parsing_scope = CONFIG_SCOPE_COMMAND;
> diff --git a/t/helper/test-config.c b/t/helper/test-config.c
> index 61da2574c5..284f83a921 100644
> --- a/t/helper/test-config.c
> +++ b/t/helper/test-config.c
> @@ -2,12 +2,19 @@
>  #include "cache.h"
>  #include "config.h"
>  #include "string-list.h"
> +#include "submodule-config.h"
>
>  /*
>   * This program exposes the C API of the configuration mechanism
>   * as a set of simple commands in order to facilitate testing.
>   *
> - * Reads stdin and prints result of command to stdout:
> + * Usage: test-tool config [--submodule=<path>] <cmd> [<args>]
> + *
> + * If --submodule=<path> is given, <cmd> will operate on the submodule at the
> + * given <path>. This option is not valid for the commands: read_early_config,
> + * configset_get_value and configset_get_value_multi.
> + *
> + * Possible cmds are:
>   *
>   * get_value -> prints the value with highest priority for the entered key
>   *
> @@ -86,6 +93,8 @@ int cmd__config(int argc, const char **argv)
>         const struct string_list *strptr;
>         struct config_set cs = { .hash_initialized = 0 };
>         enum test_config_exit_code ret = TC_SUCCESS;
> +       struct repository *repo = the_repository;
> +       const char *subrepo_path = NULL;
>
>         argc--; /* skip over "config" */
>         argv++;
> @@ -93,7 +102,18 @@ int cmd__config(int argc, const char **argv)
>         if (argc == 0)
>                 goto print_usage_error;
>
> +       if (skip_prefix(*argv, "--submodule=", &subrepo_path)) {
> +               argc--;
> +               argv++;
> +               if (argc == 0)
> +                       goto print_usage_error;
> +       }
> +
>         if (argc == 2 && !strcmp(argv[0], "read_early_config")) {
> +               if (subrepo_path) {
> +                       fprintf(stderr, "Cannot use --submodule with read_early_config\n");
> +                       return TC_USAGE_ERROR;
> +               }
>                 read_early_config(early_config_cb, (void *)argv[1]);
>                 return TC_SUCCESS;
>         }
> @@ -101,8 +121,23 @@ int cmd__config(int argc, const char **argv)
>         setup_git_directory();
>         git_configset_init(&cs);
>
> +       if (subrepo_path) {
> +               const struct submodule *sub;
> +               struct repository *subrepo = xcalloc(1, sizeof(*repo));
> +
> +               sub = submodule_from_path(the_repository, &null_oid, subrepo_path);
> +               if (!sub || repo_submodule_init(subrepo, the_repository, sub)) {
> +                       fprintf(stderr, "Invalid argument to --submodule: '%s'\n",
> +                               subrepo_path);
> +                       free(subrepo);
> +                       ret = TC_USAGE_ERROR;
> +                       goto out;
> +               }
> +               repo = subrepo;
> +       }
> +
>         if (argc == 2 && !strcmp(argv[0], "get_value")) {
> -               if (!git_config_get_value(argv[1], &v)) {
> +               if (!repo_config_get_value(repo, argv[1], &v)) {
>                         if (!v)
>                                 printf("(NULL)\n");
>                         else
> @@ -112,7 +147,7 @@ int cmd__config(int argc, const char **argv)
>                         ret = TC_VALUE_NOT_FOUND;
>                 }
>         } else if (argc == 2 && !strcmp(argv[0], "get_value_multi")) {
> -               strptr = git_config_get_value_multi(argv[1]);
> +               strptr = repo_config_get_value_multi(repo, argv[1]);
>                 if (strptr) {
>                         for (i = 0; i < strptr->nr; i++) {
>                                 v = strptr->items[i].string;
> @@ -126,27 +161,33 @@ int cmd__config(int argc, const char **argv)
>                         ret = TC_VALUE_NOT_FOUND;
>                 }
>         } else if (argc == 2 && !strcmp(argv[0], "get_int")) {
> -               if (!git_config_get_int(argv[1], &val)) {
> +               if (!repo_config_get_int(repo, argv[1], &val)) {
>                         printf("%d\n", val);
>                 } else {
>                         printf("Value not found for \"%s\"\n", argv[1]);
>                         ret = TC_VALUE_NOT_FOUND;
>                 }
>         } else if (argc == 2 && !strcmp(argv[0], "get_bool")) {
> -               if (!git_config_get_bool(argv[1], &val)) {
> +               if (!repo_config_get_bool(repo, argv[1], &val)) {
>                         printf("%d\n", val);
>                 } else {
> +
>                         printf("Value not found for \"%s\"\n", argv[1]);
>                         ret = TC_VALUE_NOT_FOUND;
>                 }
>         } else if (argc == 2 && !strcmp(argv[0], "get_string")) {
> -               if (!git_config_get_string_const(argv[1], &v)) {
> +               if (!repo_config_get_string_const(repo, argv[1], &v)) {
>                         printf("%s\n", v);
>                 } else {
>                         printf("Value not found for \"%s\"\n", argv[1]);
>                         ret = TC_VALUE_NOT_FOUND;
>                 }
>         } else if (argc >= 2 && !strcmp(argv[0], "configset_get_value")) {
> +               if (subrepo_path) {
> +                       fprintf(stderr, "Cannot use --submodule with configset_get_value\n");
> +                       ret = TC_USAGE_ERROR;
> +                       goto out;
> +               }
>                 for (i = 2; i < argc; i++) {
>                         int err;
>                         if ((err = git_configset_add_file(&cs, argv[i]))) {
> @@ -165,6 +206,11 @@ int cmd__config(int argc, const char **argv)
>                         ret = TC_VALUE_NOT_FOUND;
>                 }
>         } else if (argc >= 2 && !strcmp(argv[0], "configset_get_value_multi")) {
> +               if (subrepo_path) {
> +                       fprintf(stderr, "Cannot use --submodule with configset_get_value_multi\n");
> +                       ret = TC_USAGE_ERROR;
> +                       goto out;
> +               }
>                 for (i = 2; i < argc; i++) {
>                         int err;
>                         if ((err = git_configset_add_file(&cs, argv[i]))) {
> @@ -187,14 +233,19 @@ int cmd__config(int argc, const char **argv)
>                         ret = TC_VALUE_NOT_FOUND;
>                 }
>         } else if (!strcmp(argv[0], "iterate")) {
> -               git_config(iterate_cb, NULL);
> +               repo_config(repo, iterate_cb, NULL);
>         } else {
>  print_usage_error:
> -               fprintf(stderr, "Invalid syntax. Usage: test-tool config <cmd> [args]\n");
> +               fprintf(stderr, "Invalid syntax. Usage: test-tool config"
> +                               " [--submodule=<path>] <cmd> [args]\n");
>                 ret = TC_USAGE_ERROR;
>         }
>
>  out:
>         git_configset_clear(&cs);
> +       if (repo != the_repository) {
> +               repo_clear(repo);
> +               free(repo);
> +       }
>         return ret;
>  }
> diff --git a/t/t2404-worktree-config.sh b/t/t2404-worktree-config.sh
> index 286121d8de..b6ab793203 100755
> --- a/t/t2404-worktree-config.sh
> +++ b/t/t2404-worktree-config.sh
> @@ -76,4 +76,20 @@ test_expect_success 'config.worktree no longer read without extension' '
>         test_cmp_config -C wt2 shared this.is
>  '
>
> +test_expect_success 'correctly read config.worktree from submodules' '
> +       test_unconfig extensions.worktreeConfig &&
> +       git init sub &&
> +       (
> +               cd sub &&
> +               test_commit A &&
> +               git config extensions.worktreeConfig true &&
> +               git config --worktree wtconfig.sub test-value
> +       ) &&
> +       git submodule add ./sub &&
> +       git commit -m "add sub" &&
> +       echo test-value >expect &&
> +       test-tool config --submodule=sub get_value wtconfig.sub >actual &&
> +       test_cmp expect actual
> +'
> +
>  test_done
> --
> 2.26.2

  reply	other threads:[~2020-06-16 19:13 UTC|newest]

Thread overview: 120+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-24  6:04 [RFC PATCH 0/3] grep: honor sparse checkout and add option to ignore it Matheus Tavares
2020-03-24  6:11 ` [RFC PATCH 1/3] doc: grep: unify info on configuration variables Matheus Tavares
2020-03-24  7:57   ` Elijah Newren
2020-03-24 21:26     ` Junio C Hamano
2020-03-24 23:38       ` Matheus Tavares
2020-03-24  6:12 ` [RFC PATCH 2/3] grep: honor sparse checkout patterns Matheus Tavares
2020-03-24  7:15   ` Elijah Newren
2020-03-24 15:12     ` Derrick Stolee
2020-03-24 16:16       ` Elijah Newren
2020-03-24 17:02         ` Derrick Stolee
2020-03-24 23:01       ` Matheus Tavares Bernardino
2020-03-24 22:55     ` Matheus Tavares Bernardino
2020-04-21  2:10       ` Matheus Tavares Bernardino
2020-04-21  3:08         ` Elijah Newren
2020-04-22 12:08           ` Derrick Stolee
2020-04-23  6:09           ` Matheus Tavares Bernardino
2020-03-24  6:13 ` [RFC PATCH 3/3] grep: add option to ignore sparsity patterns Matheus Tavares
2020-03-24  7:54   ` Elijah Newren
2020-03-24 18:30     ` Junio C Hamano
2020-03-24 19:07       ` Elijah Newren
2020-03-25 20:18         ` Junio C Hamano
2020-03-30  3:23       ` Matheus Tavares Bernardino
2020-03-31 19:12         ` Elijah Newren
2020-03-31 20:02           ` Derrick Stolee
2020-04-27 17:15             ` Matheus Tavares Bernardino
2020-04-29 16:46               ` Elijah Newren
2020-04-29 17:21             ` Elijah Newren
2020-03-25 23:15     ` Matheus Tavares Bernardino
2020-03-26  6:02       ` Elijah Newren
2020-03-27 15:51         ` Junio C Hamano
2020-03-27 19:01           ` Elijah Newren
2020-03-30  1:12         ` Matheus Tavares Bernardino
2020-03-31 16:48           ` Elijah Newren
2020-05-10  0:41 ` [RFC PATCH v2 0/4] grep: honor sparse checkout and add option to ignore it Matheus Tavares
2020-05-10  0:41   ` [RFC PATCH v2 1/4] doc: grep: unify info on configuration variables Matheus Tavares
2020-05-10  0:41   ` [RFC PATCH v2 2/4] config: load the correct config.worktree file Matheus Tavares
2020-05-11 19:10     ` Junio C Hamano
2020-05-12 22:55       ` Matheus Tavares Bernardino
2020-05-12 23:22         ` Junio C Hamano
2020-05-10  0:41   ` [RFC PATCH v2 3/4] grep: honor sparse checkout patterns Matheus Tavares
2020-05-11 19:35     ` Junio C Hamano
2020-05-13  0:05       ` Matheus Tavares Bernardino
2020-05-13  0:17         ` Junio C Hamano
2020-05-21  7:26           ` Elijah Newren
2020-05-21 17:35             ` Matheus Tavares Bernardino
2020-05-21 17:52               ` Elijah Newren
2020-05-22  5:49                 ` Matheus Tavares Bernardino
2020-05-22 14:26                   ` Elijah Newren
2020-05-22 15:36                     ` Elijah Newren
2020-05-22 20:54                       ` Matheus Tavares Bernardino
2020-05-22 21:06                         ` Elijah Newren
2020-06-10 11:40                     ` Derrick Stolee
2020-06-10 16:22                       ` Matheus Tavares Bernardino
2020-06-10 17:42                         ` Derrick Stolee
2020-06-10 18:14                           ` Matheus Tavares Bernardino
2020-06-10 20:12                         ` Elijah Newren
2020-06-10 19:58                       ` Elijah Newren
2020-05-21  7:36       ` Elijah Newren
2020-05-10  0:41   ` [RFC PATCH v2 4/4] config: add setting to ignore sparsity patterns in some cmds Matheus Tavares
2020-05-10  4:23     ` Matheus Tavares Bernardino
2020-05-21 17:18       ` Elijah Newren
2020-05-21  7:09     ` Elijah Newren
2020-05-28  1:12   ` [PATCH v3 0/5] grep: honor sparse checkout and add option to ignore it Matheus Tavares
2020-05-28  1:12     ` [PATCH v3 1/5] doc: grep: unify info on configuration variables Matheus Tavares
2020-05-28  1:13     ` [PATCH v3 2/5] t/helper/test-config: return exit codes consistently Matheus Tavares
2020-05-30 14:29       ` Elijah Newren
2020-06-01  4:36         ` Matheus Tavares Bernardino
2020-05-28  1:13     ` [PATCH v3 3/5] config: correctly read worktree configs in submodules Matheus Tavares
2020-05-30 14:49       ` Elijah Newren
2020-06-01  4:38         ` Matheus Tavares Bernardino
2020-05-28  1:13     ` [PATCH v3 4/5] grep: honor sparse checkout patterns Matheus Tavares
2020-05-30 15:48       ` Elijah Newren
2020-06-01  4:44         ` Matheus Tavares Bernardino
2020-06-03  2:38           ` Elijah Newren
2020-06-10 17:08             ` Matheus Tavares Bernardino
2020-05-28  1:13     ` [PATCH v3 5/5] config: add setting to ignore sparsity patterns in some cmds Matheus Tavares
2020-05-30 16:18       ` Elijah Newren
2020-06-01  4:45         ` Matheus Tavares Bernardino
2020-06-03  2:39           ` Elijah Newren
2020-06-10 21:15             ` Matheus Tavares Bernardino
2020-06-11  0:35               ` Elijah Newren
2020-06-12 15:44     ` [PATCH v4 0/6] grep: honor sparse checkout and add option to ignore it Matheus Tavares
2020-06-12 15:44       ` [PATCH v4 1/6] doc: grep: unify info on configuration variables Matheus Tavares
2020-06-12 15:45       ` [PATCH v4 2/6] t/helper/test-config: return exit codes consistently Matheus Tavares
2020-06-12 15:45       ` [PATCH v4 3/6] t/helper/test-config: facilitate addition of new cli options Matheus Tavares
2020-06-12 15:45       ` [PATCH v4 4/6] config: correctly read worktree configs in submodules Matheus Tavares
2020-06-16 19:13         ` Elijah Newren [this message]
2020-06-21 16:05           ` Matheus Tavares Bernardino
2020-09-01  2:41         ` Jonathan Nieder
2020-09-01 21:44           ` Matheus Tavares Bernardino
2020-06-12 15:45       ` [PATCH v4 5/6] grep: honor sparse checkout patterns Matheus Tavares
2020-06-12 15:45       ` [PATCH v4 6/6] config: add setting to ignore sparsity patterns in some cmds Matheus Tavares
2020-06-16 22:31       ` [PATCH v4 0/6] grep: honor sparse checkout and add option to ignore it Elijah Newren
2020-09-02  6:17       ` [PATCH v5 0/8] " Matheus Tavares
2020-09-02  6:17         ` [PATCH v5 1/8] doc: grep: unify info on configuration variables Matheus Tavares
2020-09-02  6:17         ` [PATCH v5 2/8] t1308-config-set: avoid false positives when using test-config Matheus Tavares
2020-09-02  6:57           ` Eric Sunshine
2020-09-02 16:16             ` Matheus Tavares Bernardino
2020-09-02 16:38               ` Eric Sunshine
2020-09-02  6:17         ` [PATCH v5 3/8] t/helper/test-config: be consistent with exit codes Matheus Tavares
2020-09-02  6:17         ` [PATCH v5 4/8] t/helper/test-config: check argc before accessing argv Matheus Tavares
2020-09-02  7:18           ` Eric Sunshine
2020-09-02  6:17         ` [PATCH v5 5/8] t/helper/test-config: unify exit labels Matheus Tavares
2020-09-02  7:30           ` Eric Sunshine
2020-09-02  6:17         ` [PATCH v5 6/8] config: correctly read worktree configs in submodules Matheus Tavares
2020-09-02 20:15           ` Jonathan Nieder
2020-09-09 13:04             ` Matheus Tavares Bernardino
2020-09-09 23:32               ` Jonathan Nieder
2020-09-02  6:17         ` [PATCH v5 7/8] grep: honor sparse checkout patterns Matheus Tavares
2020-09-02  6:17         ` [PATCH v5 8/8] config: add setting to ignore sparsity patterns in some cmds Matheus Tavares
2020-09-10 17:21         ` [PATCH v6 0/9] grep: honor sparse checkout and add option to ignore it Matheus Tavares
2020-09-10 17:21           ` [PATCH v6 1/9] doc: grep: unify info on configuration variables Matheus Tavares
2020-09-10 17:21           ` [PATCH v6 2/9] t1308-config-set: avoid false positives when using test-config Matheus Tavares
2020-09-10 17:21           ` [PATCH v6 3/9] t/helper/test-config: be consistent with exit codes Matheus Tavares
2020-09-10 17:21           ` [PATCH v6 4/9] t/helper/test-config: diagnose missing arguments Matheus Tavares
2020-09-10 17:21           ` [PATCH v6 5/9] t/helper/test-config: unify exit labels Matheus Tavares
2020-09-10 17:21           ` [PATCH v6 6/9] config: make do_git_config_sequence receive a 'struct repository' Matheus Tavares
2020-09-10 17:21           ` [PATCH v6 7/9] config: correctly read worktree configs in submodules Matheus Tavares
2020-09-10 17:21           ` [PATCH v6 8/9] grep: honor sparse checkout patterns Matheus Tavares
2020-09-10 17:21           ` [PATCH v6 9/9] config: add setting to ignore sparsity patterns in some cmds Matheus Tavares

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