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authorChristoph Junghans <ottxor@gentoo.org>2012-06-04 20:06:02 +0100
committerSam James <sam@gentoo.org>2022-10-10 20:06:07 +0100
commit098d7b1efee0412674d454bcf06c07a8d348d53d (patch)
tree1c2b75a21683453887cd058d69c05b919d9135ae
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awk.eselect: initial commit (0.2)0.2
Signed-off-by: Sam James <sam@gentoo.org>
-rw-r--r--awk.eselect159
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+# Copyright 1999-2012 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id: $
+
+DESCRIPTION="Manage {,/usr}/bin/awk implementations"
+MAINTAINER="ottxor@gentoo.org"
+VERSION="0.2"
+
+## Functions ##
+
+# find a list of awk symlink targets, best first
+find_targets() {
+ local t
+ for t in \
+ "${EROOT}/usr/bin/gawk" \
+ "${EROOT}/usr/bin/mawk" \
+ "${EROOT}/usr/bin/nawk" \
+ "${EROOT}/bin/busybox" \
+ ; do
+ if [[ -x ${t} ]]; then
+ echo ${t##*/}
+ fi
+ done
+}
+
+# set the awk symlink
+set_symlinks() {
+ local target=${1} targets extension dir i rel_target
+
+ [[ ! -L ${EROOT}/bin/awk && -e ${EROOT}/bin/awk ]] && \
+ die -q "/bin/awk is not a symlink!"
+
+ [[ ! -L ${EROOT}/usr/bin/awk && -e ${EROOT}/usr/bin/awk ]] && \
+ die -q "/usr/bin/awk is not a symlink!"
+
+ if is_number "${target}" && [[ ${target} -ge 1 ]]; then
+ targets=( $(find_targets) )
+ target=${targets[target-1]}
+ fi
+
+ if [[ ${target} == "busybox" ]]; then
+ dir="${EROOT}/bin"
+ else
+ dir="${EROOT}/usr/bin"
+ fi
+
+ [[ -x ${dir}/${target} ]] || die -q "Target '${target}' doesn't appear to be valid!"
+
+ for i in /bin /usr/bin; do
+ rel_target=$(relative_name "${dir}/${target}" "${EROOT}${i}")
+ ln -sf "${rel_target}" "${EROOT}${i}/awk" || \
+ die -q "Couldn't set ${target} ${i}/awk symlink"
+ done
+
+ rm -f "${EROOT}"/usr/share/man/man1/awk.1{,.bz2,.gz,lzma}
+ for x in ".1" ".1.bz2" ".1.gz" ".1.lzma" ; do
+ if [[ -e ${EROOT}/usr/share/man/man1/${target}${x} ]] ; then
+ extension="${x}"
+ break
+ fi
+ done
+
+ #busybox has no man page
+ if [[ -z "${extension}" ]] ; then
+ echo "Couldn't find a man page for ${target}; skipping." 1>&2
+ return 1
+ fi
+
+ if ! ln -s "${target}${extension}" "${EROOT}/usr/share/man/man1/awk${extension}"; then
+ echo "Couldn't create man page symlink for ${target}; skipping." 1>&2
+ return 1
+ fi
+}
+
+### show action ###
+
+describe_show() {
+ echo "Show the current awk implementation"
+}
+
+do_show() {
+ [[ -z ${@} ]] || die -q "Too many parameters"
+
+ write_list_start "Current awk implementation:"
+ if [[ -L ${EROOT}/usr/bin/awk ]]; then
+ write_kv_list_entry "$(basename $(readlink ${ROOT}/usr/bin/awk))" ""
+ elif [[ -e ${EROOT}/usr/bin/awk ]]; then
+ write_kv_list_entry "(not a symlink)" ""
+ else
+ write_kv_list_entry "(unset)" ""
+ fi
+}
+
+### list action ###
+
+describe_list() {
+ echo "List available awk implementations"
+}
+
+do_list() {
+ [[ -z ${@} ]] || die -q "Too many parameters"
+
+ local i targets
+
+ targets=( $(find_targets) )
+ for (( i = 0; i < ${#targets[@]}; i++ )) ; do
+ [[ ${targets[${i}]} == $(basename $(readlink "${EROOT}"/usr/bin/awk)) ]] && \
+ targets[${i}]=$(highlight_marker "${targets[${i}]}")
+ done
+ write_list_start "Available awk implementations:"
+ write_numbered_list -m '(none found)' "${targets[@]}"
+}
+
+### set action ###
+
+describe_set() {
+ echo "Set a new awk implementation"
+}
+
+describe_set_options() {
+ echo "target : Target name or number (from 'list' action)"
+}
+
+describe_set_parameters() {
+ echo "<target>"
+}
+
+do_set() {
+ if [[ -z ${1} ]]; then
+ die -q "Not enough parameters"
+ elif [[ -n ${2} ]]; then
+ die -q "Too many parameters"
+ else
+ set_symlinks "${1}"
+ fi
+}
+
+### update action ###
+
+describe_update() {
+ echo "Automatically update the awk implementation"
+}
+
+describe_update_options() {
+ echo "ifunset : Do not override existing implementation"
+}
+
+do_update() {
+ [[ -z ${1} || ( -z ${2} && ( ${1} == ifunset || ${1} == '--if-unset' ) ) ]] || \
+ die -q "Usage error"
+
+ [[ ( ${1} == ifunset || ${1} == '--if-unset' ) \
+ && -L ${EROOT}/usr/bin/awk && -x ${EROOT}/usr/bin/awk ]] && \
+ return
+
+ set_symlinks 1
+}
+
+# vim: set syn=sh :