Re: [PATCH] init-db: migrate to parse-options

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Michał Kiedrowicz wrote:
> Also add missing --bare to init-db synopsis.
>
> Signed-off-by: Michał Kiedrowicz <michal.kiedrowicz@xxxxxxxxx>
> ---

Heh, I had a very similar patch queued up.

>  Documentation/git-init-db.txt |    2 +-
>  builtin-init-db.c             |   51 ++++++++++++++++++++++++-----------------
>  2 files changed, 31 insertions(+), 22 deletions(-)
>
> diff --git a/Documentation/git-init-db.txt b/Documentation/git-init-db.txt
> index 1fd0ff2..eba3cb4 100644
> --- a/Documentation/git-init-db.txt
> +++ b/Documentation/git-init-db.txt
> @@ -8,7 +8,7 @@ git-init-db - Creates an empty git repository
>  
>  SYNOPSIS
>  --------
> -'git init-db' [-q | --quiet] [--template=<template_directory>] [--shared[=<permissions>]]
> +'git init-db' [-q | --quiet] [--bare] [--template=<template_directory>] [--shared[=<permissions>]]
>  
>  
>  DESCRIPTION
> diff --git a/builtin-init-db.c b/builtin-init-db.c
> index 4a56006..9b1ce45 100644
> --- a/builtin-init-db.c
> +++ b/builtin-init-db.c
> @@ -6,6 +6,7 @@
>  #include "cache.h"
>  #include "builtin.h"
>  #include "exec_cmd.h"
> +#include "parse-options.h"
>  
>  #ifndef DEFAULT_GIT_TEMPLATE_DIR
>  #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
> @@ -370,8 +371,16 @@ static int guess_repository_type(const char *git_dir)
>  	return 1;
>  }
>  
> -static const char init_db_usage[] =
> -"git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]]";
> +static int shared_callback(const struct option *opt, const char *arg, int unset)
> +{
> +	*((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP;
> +	return 0;
> +}

What occurs when "--no-shared" is used? I have this callback use an if,
else if, else to handle all possibilities.

> +
> +static const char *const init_db_usage[] = {
> +	"git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]]",
> +	NULL
> +};
>  
>  /*
>   * If you want to, you can share the DB area with any number of branches.
> @@ -384,25 +393,25 @@ int cmd_init_db(int argc, const char **argv, const char *prefix)
>  	const char *git_dir;
>  	const char *template_dir = NULL;
>  	unsigned int flags = 0;
> -	int i;
> -
> -	for (i = 1; i < argc; i++, argv++) {
> -		const char *arg = argv[1];
> -		if (!prefixcmp(arg, "--template="))
> -			template_dir = arg+11;
> -		else if (!strcmp(arg, "--bare")) {
> -			static char git_dir[PATH_MAX+1];
> -			is_bare_repository_cfg = 1;
> -			setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir,
> -						sizeof(git_dir)), 0);
> -		} else if (!strcmp(arg, "--shared"))
> -			init_shared_repository = PERM_GROUP;
> -		else if (!prefixcmp(arg, "--shared="))
> -			init_shared_repository = git_config_perm("arg", arg+9);
> -		else if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet"))
> -			flags |= INIT_DB_QUIET;
> -		else
> -			usage(init_db_usage);
> +	const struct option init_db_options[] = {
> +		OPT_STRING(0, "template", &template_dir, "template-directory",
> +				"provide the directory from which templates will be used"),
> +		OPT_SET_INT(0, "bare", &is_bare_repository_cfg,
> +				"create a bare repository", 1),
> +		{ OPTION_CALLBACK, 0, "shared", &init_shared_repository,
> +			"permissions",
> +			"specify that the git repository is to be shared amongst several users",
> +			PARSE_OPT_OPTARG, shared_callback, 0},

Or you can add PARSE_OPT_NONEG here and avoid the above comment.

> +		OPT_BIT('q', "quiet", &flags, "be quiet", INIT_DB_QUIET),
> +		OPT_END()
> +	};
> +
> +	parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);
> +
> +	if(is_bare_repository_cfg == 1) {
> +		static char git_dir[PATH_MAX+1];
> +		setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir,
> +					sizeof(git_dir)), 0);
>  	}
>  
>  	if (init_shared_repository != -1)

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