Re: [RFC PATCH 04/10] submodule--helper: add a new 'config' subcommand

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On Mon, May 14, 2018 at 3:58 AM, Antonio Ospite <ao2@xxxxxx> wrote:
> Add a new 'config' subcommand to 'submodule--helper', this extra level
> of indirection makes it possible to add some flexibility to how the
> submodules configuration is handled.
>
> Signed-off-by: Antonio Ospite <ao2@xxxxxx>
> ---
>  builtin/submodule--helper.c | 39 +++++++++++++++++++++++++++++++++++++
>  t/t7411-submodule-config.sh | 26 +++++++++++++++++++++++++
>  2 files changed, 65 insertions(+)
>
> diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
> index 9e8f2acd5..b32110e3b 100644
> --- a/builtin/submodule--helper.c
> +++ b/builtin/submodule--helper.c
> @@ -1825,6 +1825,44 @@ static int is_active(int argc, const char **argv, const char *prefix)
>         return !is_submodule_active(the_repository, argv[1]);
>  }
>
> +static int config_print_callback(const char *key_, const char *value_, void *cb_data)
> +{
> +       char *key = cb_data;
> +
> +       if (!strcmp(key, key_))
> +               printf("%s\n", value_);
> +
> +       return 0;
> +}
> +
> +static int module_config(int argc, const char **argv, const char *prefix)
> +{
> +       int ret;
> +
> +       if (argc < 2 || argc > 3)
> +               die("submodule--helper config takes 1 or 2 arguments: name [value]");
> +
> +       /* Equivalent to ACTION_GET in builtin/config.c */
> +       if (argc == 2) {
> +               char *key;
> +
> +               ret = git_config_parse_key(argv[1], &key, NULL);
> +               if (ret < 0)
> +                       return CONFIG_INVALID_KEY;
> +
> +               config_from_gitmodules(config_print_callback, the_repository, key);
> +
> +               free(key);
> +               return 0;
> +       }
> +
> +       /* Equivalent to ACTION_SET in builtin/config.c */
> +       if (argc == 3)
> +               return config_gitmodules_set(argv[1], argv[2]);

Ah, here we definitely want to set it in the .gitmodules file?
(Or does that change later in this series?)

> +
> +       return 0;
> +}
> +
>  #define SUPPORT_SUPER_PREFIX (1<<0)
>
>  struct cmd_struct {
> @@ -1850,6 +1888,7 @@ static struct cmd_struct commands[] = {
>         {"push-check", push_check, 0},
>         {"absorb-git-dirs", absorb_git_dirs, SUPPORT_SUPER_PREFIX},
>         {"is-active", is_active, 0},
> +       {"config", module_config, 0},
>  };
>
>  int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
> diff --git a/t/t7411-submodule-config.sh b/t/t7411-submodule-config.sh
> index a648de6a9..dfe019f05 100755
> --- a/t/t7411-submodule-config.sh
> +++ b/t/t7411-submodule-config.sh
> @@ -139,4 +139,30 @@ test_expect_success 'error in history in fetchrecursesubmodule lets continue' '
>         )
>  '
>
> +test_expect_success 'reading submodules config with "submodule--helper config"' '
> +       (cd super &&

I think the project prefers a style
of the cd at the same level of the echo and the following commands.

However we might not need the (cd super && ...) via

  echo "../submodule"  >expected
  git -C super ubmodule--helper config submodule.submodule.url >../actual
  test_cmp expected actual

Our friends developing git on Windows will thank us for saving
to spawn a shell as spawning processes is expensive on Windows. :)
Also we have fewer lines of code.

The patch looks good to me,
Thanks,
Stefan



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