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Signed-off-by: David Seifert <soap@g.o> |
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--- |
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eclass/optfeature.eclass | 63 ++++++++++++++++++++++++++++++++++++++++ |
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1 file changed, 63 insertions(+) |
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create mode 100644 eclass/optfeature.eclass |
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|
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diff --git a/eclass/optfeature.eclass b/eclass/optfeature.eclass |
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new file mode 100644 |
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index 00000000000..b0082606cd6 |
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--- /dev/null |
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+++ b/eclass/optfeature.eclass |
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@@ -0,0 +1,63 @@ |
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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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+ |
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+# @ECLASS: optfeature.eclass |
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+# @MAINTAINER: |
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+# base-system@g.o |
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+# @BLURB: Advertise optional functionality that might be useful to users |
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+ |
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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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+ |
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+if [[ -z ${_OPTFEATURE_ECLASS} ]]; then |
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+_OPTFEATURE_ECLASS=1 |
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+ |
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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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+ |
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+ local i j msg |
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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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+ for j in ${i}; do |
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+ if has_version "${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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+ msg=" " |
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+ for j in ${i}; 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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+ |
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+fi |
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-- |
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2.28.0 |