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# -*-eselect-*- vim: ft=eselect
# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
DESCRIPTION="Manage Maven targets"
MAINTAINER="java@gentoo.org"
VERSION="0.2"
MVN="${EROOT}/usr/bin/mvn"
# find a list of mvn symlink targets, best first.
find_targets() {
for f in $(ls -r "${MVN}"-[0-9]* 2> /dev/null) ; do
if [[ -f "${f}" ]] ; then
echo $(basename "${f}")
fi
done
}
# get a named or numbered target.
find_target() {
local target=${1}
if is_number "${target}" && [[ ${target} -ge 1 ]] ; then
targets=( $(find_targets ) )
[[ -z "${targets}" ]] && die -q "No targets found!"
target=${targets[target-1]}
fi
if [[ "${target}" = mvn-[0-9]* ]] && [[ -f "${EROOT}/usr/bin/${target}" ]] ; then
echo ${target}
else
die -q "Target \"${1}\" doesn't appear to be valid!"
fi
}
# try to remove the mvn symlink.
remove_symlink() {
rm "${MVN}" &>/dev/null
}
# determine the current target.
get_target() {
local canonicalised=$(canonicalise "${MVN}")
echo $(basename "${canonicalised}")
}
# set the Maven symlink.
set_symlink() {
local target=$(find_target "${1}")
remove_symlink
ln -s "${target}" "${MVN}" || die "Couldn't set ${target} symlink."
}
### show action ###
describe_show() {
echo "Show current Maven target"
}
do_show() {
if [[ ${#} -gt 0 ]]; then
die -q "No parameters allowed."
fi
if [[ -L "${MVN}" ]] ; then
get_target
return 0
elif [[ -e "${MVN}" ]] ; then
echo "(not a symlink)" >&2
return 1
else
echo "(unset)" >&2
return 1
fi
}
### list action ###
describe_list() {
echo "List available Maven targets"
}
do_list() {
if [[ ${#} -gt 0 ]]; then
die -q "Usage error: no parameters allowed."
fi
local i targets
targets=( $(find_targets) )
for (( i = 0; i < ${#targets[@]}; i++ )); do
[[ ${targets[i]} = $(basename "$(canonicalise "${MVN}")") ]] \
&& targets[i]=$(highlight_marker "${targets[i]}")
done
write_list_start "Available Maven targets:"
write_numbered_list -m "(none found)" "${targets[@]}"
}
### set action ###
describe_set() {
echo "Set a new Maven target"
}
describe_set_options() {
echo "target : Target name or number (from 'list' action)"
}
describe_set_parameters() {
echo "<target>"
}
do_set() {
if [[ $# -gt 1 ]]; then
die -q "Too many parameters. Expected only one."
fi
local target=${1}
if [[ -z "${target}" ]] ; then
die -q "You didn't give me a target name or number."
elif [[ -L "${MVN}" ]] ; then
if ! remove_symlink ; then
die -q "Can't remove existing Maven provider."
elif ! set_symlink "${1}" ; then
die -q "Can't set new Maven provider."
fi
elif [[ -e "${MVN}" ]] ; then
write_warning_msg "Can't set a new Maven provider. There's a file in the way at ${MVN}. You can try removing it manually, and then re-running this command."
else
set_symlink "${target}" || die -q "Wasn't able to set a new provider."
fi
}
### update action ###
describe_update() {
echo "Set the Maven target to the latest if the current target is invalid or if the given target is the latest"
}
describe_update_options() {
echo "target (optional) : Target name (from 'list' action)"
}
describe_update_parameters() {
echo "<target>"
}
do_update() {
if [[ $# -gt 1 ]] ; then
die -q "Too many parameters. Expected only one."
fi
# For pkg_postrm
if [[ ! $(find_targets) ]]; then
remove_symlink
return
fi
local canonicalised=$(canonicalise "${MVN}")
if [[ ! -L "${MVN}" ]] || [[ ! -f "${canonicalised}" ]] ; then
do_set 1
elif [[ -n "${1}" ]] ; then
# Check whether target name is valid.
find_target "${1}" > /dev/null
if [[ "${1}" == "$(find_target 1)" ]] ; then
do_set 1
fi
fi
}
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