67 lines
1.6 KiB
Bash
67 lines
1.6 KiB
Bash
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# Copyright 1999-2020 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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# @ECLASS: optfeature.eclass
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# @MAINTAINER:
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# base-system@gentoo.org
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# @BLURB: Advertise optional functionality that might be useful to users
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case ${EAPI:-0} in
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[0-7]) ;;
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*) die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}" ;;
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esac
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if [[ -z ${_OPTFEATURE_ECLASS} ]]; then
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_OPTFEATURE_ECLASS=1
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# @FUNCTION: optfeature
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# @USAGE: <short description> <package atom to match> [other atoms]
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# @DESCRIPTION:
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# Print out a message suggesting an optional package (or packages)
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# not currently installed which provides the described functionality.
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#
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# The following snippet would suggest app-misc/foo for optional foo support,
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# app-misc/bar or app-misc/baz[bar] for optional bar support
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# and either both app-misc/a and app-misc/b or app-misc/c for alphabet support.
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# @CODE
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# optfeature "foo support" app-misc/foo
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# optfeature "bar support" app-misc/bar app-misc/baz[bar]
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# optfeature "alphabet support" "app-misc/a app-misc/b" app-misc/c
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# @CODE
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optfeature() {
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debug-print-function ${FUNCNAME} "$@"
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local i j msg
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local -a arr
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local desc=$1
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local flag=0
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shift
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for i; do
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read -r -d '' -a arr <<<"${i}"
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for j in "${arr[@]}"; do
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if has_version "${j}"; then
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flag=1
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else
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flag=0
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break
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fi
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done
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if [[ ${flag} -eq 1 ]]; then
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break
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fi
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done
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if [[ ${flag} -eq 0 ]]; then
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for i; do
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read -r -d '' -a arr <<<"${i}"
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msg=" "
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for j in "${arr[@]}"; do
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msg+=" ${j} and"
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done
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msg="${msg:0: -4} for ${desc}"
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elog "${msg}"
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done
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fi
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}
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fi
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