On 11/21/21 02:57, Florian Schmaus wrote:
> Following the pattern found in other eclasses, add GO_OPTIONAL to the
> go-module eclass. This allows to inherit the eclass without pulling
> its dependencies. See, e.g., bug #775779 for the motivation.
> 
> Signed-off-by: Florian Schmaus <flow@gentoo.org>
> ---
>   eclass/go-module.eclass | 31 ++++++++++++++++++++++---------
>   1 file changed, 22 insertions(+), 9 deletions(-)
> 
> diff --git a/eclass/go-module.eclass b/eclass/go-module.eclass
> index 3ad8542a28ae..c9eb90ac62ea 100644
> --- a/eclass/go-module.eclass
> +++ b/eclass/go-module.eclass
> @@ -1,4 +1,4 @@
> -# Copyright 2019-2020 Gentoo Authors
> +# Copyright 2019-2021 Gentoo Authors
>   # Distributed under the terms of the GNU General Public License v2
>   
>   # @ECLASS: go-module.eclass
> @@ -55,13 +55,17 @@ if [[ -z ${_GO_MODULE} ]]; then
>   
>   _GO_MODULE=1
>   
> -BDEPEND=">=dev-lang/go-1.12"
> +if [[ ! ${GO_OPTIONAL} ]]; then
> +	BDEPEND=">=dev-lang/go-1.12"
>   
> -# Workaround for pkgcheck false positive: https://github.com/pkgcore/pkgcheck/issues/214
> -# MissingUnpackerDep: version ...: missing BDEPEND="app-arch/unzip"
> -# Added here rather than to each affected package, so it can be cleaned up just
> -# once when pkgcheck is improved.
> -BDEPEND+=" app-arch/unzip"
> +	# Workaround for pkgcheck false positive: https://github.com/pkgcore/pkgcheck/issues/214
> +	# MissingUnpackerDep: version ...: missing BDEPEND="app-arch/unzip"
> +	# Added here rather than to each affected package, so it can be cleaned up just
> +	# once when pkgcheck is improved.
> +	BDEPEND+=" app-arch/unzip"
> +
> +	EXPORT_FUNCTIONS src_unpack
> +fi
>   
>   # Force go to build in module mode.
>   # In this mode the GOPATH environment variable is ignored.
> @@ -83,8 +87,6 @@ QA_FLAGS_IGNORED='.*'
>   # Go packages should not be stripped with strip(1).
>   RESTRICT+=" strip"
>   
> -EXPORT_FUNCTIONS src_unpack
> -
>   # @ECLASS-VARIABLE: EGO_SUM
>   # @DESCRIPTION:
>   # This is an array based on the go.sum content from inside the target package.
> @@ -147,6 +149,17 @@ EXPORT_FUNCTIONS src_unpack
>   # directory structure.
>   declare -A -g _GOMODULE_GOSUM_REVERSE_MAP
>   
> +# @ECLASS-VARIABLE: GO_OPTIONAL
> +# @DEFAULT_UNSET
> +# @PRE_INHERIT
> +# @DESCRIPTION:
> +# If set to a non-null value before inherit, then the Go part of the
> +# ebuild will be considered optional. No dependencies will be added and
> +# no phase functions will be exported.
> +#
> +# If you enable GO_OPTIONAL, you have to set BDEPEND on >=dev-lang/go-1.12
> +# for your package and call go-module_src_unpack manually.
> +
>   # @FUNCTION: go-module_set_globals
>   # @DESCRIPTION:
>   # Convert the information in EGO_SUM for other usage in the ebuild.
> 

How about if we also add a GO_DEPEND variable, so that eclasshi 
consumers can do something like BDEPEND="go? ( ${GO_DEPEND} )" ?
-- 
Thanks,
Zac