Re: [PATCH v3 8/9] tag.c: implement '--format' option

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Karthik Nayak <karthik.188@xxxxxxxxx> writes:

> --- a/Documentation/git-tag.txt
> +++ b/Documentation/git-tag.txt
> @@ -13,7 +13,8 @@ SYNOPSIS
>  	<tagname> [<commit> | <object>]
>  'git tag' -d <tagname>...
>  'git tag' [-n[<num>]] -l [--contains <commit>] [--points-at <object>]
> -	[--column[=<options>] | --no-column] [--sort=<key>] [<pattern>...]
> +	[--column[=<options>] | --no-column] [--sort=<key>] [--format=<format>]
> +	[<pattern>...]
>  'git tag' -v <tagname>...
>  
>  DESCRIPTION
> @@ -155,6 +156,19 @@ This option is only applicable when listing tags without annotation lines.
>  	The object that the new tag will refer to, usually a commit.
>  	Defaults to HEAD.
>  
> +<format>::
> +	A string that interpolates `%(fieldname)` from the
> +	object pointed at by a ref being shown.  If `fieldname`
> +	is prefixed with an asterisk (`*`) and the ref points
> +	at a tag object, the value for the field in the object
> +	tag refers is used.  When unspecified, defaults to
> +	`%(objectname) SPC %(objecttype) TAB %(refname)`.

I think this last sentence is taken from for-each-ref where it is true,
but for 'git tag', the default is just %(refname:short), as written
here:

> -	else
> +	else if (!format)
>  		format = "%(refname:short)";

right?

> --- a/t/t7004-tag.sh
> +++ b/t/t7004-tag.sh
> @@ -1507,4 +1507,20 @@ EOF"
>  	test_cmp expect actual
>  '
>  
> +test_expect_success '--format cannot be used with -n' '
> +	test_must_fail git tag -l -n4 --format="%(refname)"
> +'
> +
> +test_expect_success '--format should list tags as per format given' '
> +	cat >expect <<-\EOF &&
> +	foo1.10
> +	foo1.3
> +	foo1.6
> +	foo1.6-rc1
> +	foo1.6-rc2
> +	EOF
> +	git tag -l --format="%(refname)" "foo*" >actual &&
> +	test_cmp expect actual
> +'

This tests the pattern argument, but the the test still passes if I
remove the --format option, so it does not test what it claims.

Also, why does "git tag"'s %(refname) behave like "git for-each-ref"'s
%(refname:short)? I find it very confusing as I think --format's
argument should be interpreted the same way for all ref-listing
commands. Actually I didn't find a way to have "git tag" display the
full refname other than with --format "refs/tags/%(refname)".

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/
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