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# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
DESCRIPTION="Manage Ruby on Rails versions"
MAINTAINER="graaff@gentoo.org"
SVN_DATE='$Date: $'
VERSION=$(svn_date_to_version "${SVN_DATE}" )
RAILS="${EROOT}/usr/bin/rails"
# find a list of rails symlink targets, best first
find_targets() {
for f in \
${RAILS}-7.2* \
${RAILS}-7.1* \
${RAILS}-7.0* \
${RAILS}-6.1* \
${RAILS}-6.0* \
${RAILS}-5.2* \
; do
if [[ -f ${f} ]] ; then
echo $(basename ${f} )
fi
done
}
# try to remove the rails symlink
remove_symlink() {
rm "${RAILS}" &>/dev/null
}
# determine the version
get_version() {
local basename="$(basename $(canonicalise ${RAILS} ) )"
local version=${basename#*-}
echo ${version}
}
# set the rails symlink
set_symlink() {
target=${1}
if is_number "${target}" && [[ ${target} -ge 1 ]] ; then
targets=( $(find_targets ) )
target=${targets[$(( ${target} - 1 ))]}
fi
if [[ -f "${ROOT}/usr/bin/${target}" ]] ; then
remove_symlink
ln -s "${ROOT}/usr/bin/${target}" "${RAILS}" || \
die "Couldn't set ${target} symlink"
else
die -q "Target \"${1}\" doesn't appear to be valid!"
fi
}
set_symlink_default() {
set_symlink 1
}
set_symlink_by_slot() {
slot=${1}
local target=$(ls ${RAILS}-${slot}* 2>/dev/null)
if [[ -n ${target} ]]; then
remove_symlink
ln -s ${target} ${RAILS}
else
die -q "No providers available for slot ${slot}"
fi
}
### show action ###
describe_show() {
echo "Manage Ruby on Rails versions"
}
do_show() {
if [[ ${#} -gt 0 ]]; then
die -q "Usage error. No parameters allowed"
fi
write_list_start "Current Ruby on Rails version:"
if [[ -L "${RAILS}" ]] ; then
write_kv_list_entry "$(basename $(canonicalise ${RAILS} ) )" ""
elif [[ -e "${RAILS}" ]] ; then
write_kv_list_entry "(not a symlink)" ""
else
write_kv_list_entry "(unset)" ""
fi
}
### list action ###
describe_list() {
echo "List available Ruby on Rails versions"
}
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 "${ROOT}/usr/bin/rails")") ]] \
&& targets[i]=$(highlight_marker "${targets[i]}")
done
write_list_start "Available Ruby on Rails versions:"
write_numbered_list -m "(none found)" "${targets[@]}"
}
### set action ###
describe_set() {
echo "Set a new Ruby on Rails version"
}
describe_set_options() {
echo "target : Target name or number (from 'list' action)"
}
describe_set_parameters() {
echo "<target>"
}
do_set() {
if [[ $# -gt 1 ]]; then
die -q "Too many parameters. Expected only 1."
fi
local version=${1}
if [[ -z ${version} ]] ; then
die -q "You didn't give me a version name"
elif [[ -L "${RAILS}" ]] ; then
if ! remove_symlink ; then
die -q "Can't remove existing rails binary"
elif ! set_symlink "${1}" ; then
die -q "Can't set new rails binary"
fi
elif [[ -e "${RAILS}" ]] ; then
write_warning_msg "Can't set a new rails provider. There's a file in the way at ${RAILS}. You can try removing it manually, and then re-running this command."
else
set_symlink ${version} || die -q "Wasn't able to set a new provider"
fi
}
### update action ###
describe_update() {
echo "Updates the rails symlink to the latest version available"
}
do_update() {
# Only set a symlink if there are any version of rails present
local target=1
local targets=( $(find_targets ) )
if [[ -z ${targets[@]} ]] ; then
remove_symlink
fi
target=${targets[$(( ${target} - 1 ))]}
if [[ -f "${ROOT}/usr/bin/${target}" ]] ; then
set_symlink_default
fi
do_show
}
# vim: set ft=eselect :
|
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