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app-eselect/eselect-swift: add 1.0-r1
Adds support for 'show --latest' to get the latest available version of Swift on the system. Signed-off-by: Itai Ferber <itai@itaiferber.net>
This commit is contained in:
Itai Ferber
parent
0cf9b38183
commit
92283709cc
24
app-eselect/eselect-swift/eselect-swift-1.0-r1.ebuild
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24
app-eselect/eselect-swift/eselect-swift-1.0-r1.ebuild
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# Copyright 1999-2025 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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EAPI=8
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DESCRIPTION="Manages Swift symlinks"
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HOMEPAGE="https://wiki.gentoo.org/wiki/No_homepage"
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S="${WORKDIR}"
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LICENSE="GPL-2"
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SLOT="0"
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KEYWORDS="~amd64"
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RDEPEND="app-admin/eselect"
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src_install() {
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insinto /usr/share/eselect/modules
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newins "${FILESDIR}/swift-${PVR}.eselect" swift.eselect || die
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}
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pkg_postinst() {
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eselect swift update
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}
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289
app-eselect/eselect-swift/files/swift-1.0-r1.eselect
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app-eselect/eselect-swift/files/swift-1.0-r1.eselect
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# -*-eselect-*- vim: ft=eselect
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# Copyright 2005-2025 Gentoo Authors
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# Distributed under the terms of the GNU GPL version 2 or later
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DESCRIPTION="Manage the Swift symlink"
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MAINTAINER="itai@itaiferber.net"
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VERSION="1.0"
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inherit path-manipulation
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BIN_DIR="${EROOT%/}/usr/bin"
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### Utility Functions ###
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# @FUNCTION: get_index
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# @USAGE: <element> <elements>...
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# @DESCRIPTION:
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# Returns the index of an element in an array, or the empty string if the
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# element was not found.
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get_index() {
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local element="$1"
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shift
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local i elements=( "$@" )
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for i in "${!elements[@]}"; do
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if [[ "${elements[i]}" = "${element}" ]]; then
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echo "${i}"
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return 0
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fi
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done
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return 1
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}
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# @FUNCTION: sort_swift_targets
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# @USAGE: <target identifier>...
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# @DESCRIPTION:
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# Lexicographically sorts an array of Swift target identifiers.
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sort_swift_targets() {
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# `sort` may not support '--version-sort', so fall back on error
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local vsort="sort --version-sort"
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${vsort} </dev/null &>/dev/null || vsort="sort"
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# Stolen from `app-eselect/eselect-luajit`: to handle potential `_beta`
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# version suffixes, we:
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# 1. Turn `swift-x.y.z` into `x.y.z 1 swift-x.y.z`
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# 2. Turn `swift-x.y.z_beta...` into `x.y.z 0 swift-x.y.z_beta...`
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# 3. Sort, which moves `_beta` versions before corresponding non-beta
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# versions
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# 4. Remove leading trivia
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printf "%s\n" "$@" \
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| sed -e 's/^\(swift-\)\?\([[:digit:].]\+\)[-_]beta/\2 0 &/' \
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-e 't;s/^\(swift-\)\?\([[:digit:].]\+\)/\2 1 &/' \
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| LC_ALL=C ${vsort} \
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| sed 's/.* //'
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}
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# @FUNCTION: list_targets
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# @DESCRIPTION:
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# Returns a lexicographically-sorted list of Swift targets found in `BIN_DIR`.
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list_targets() {
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local identifiers
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mapfile -t identifiers < <(find "${BIN_DIR}" -maxdepth 1 -type l -iname 'swift-[[:digit:]]*' -exec basename '{}' ';')
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sort_swift_targets "${identifiers[@]}"
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}
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# @FUNCTION: list_target_links
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# @USAGE: <target identifier>
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# @DESCRIPTION:
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# Given a Swift target identifier, lists all of the symlinks found in `BIN_DIR`
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# that correspond to that Swift target.
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list_target_links() {
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local target="$1"
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local version_number="${target#swift-}"
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local swift_dir="$(dirname "$(canonicalise "${BIN_DIR}/${target}")")"
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local files
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mapfile -t files < <(find "${BIN_DIR}" -maxdepth 1 -type l -iname "*-${version_number}")
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for f in "${files[@]}"; do
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local d="$(dirname "$(canonicalise "${f}")")"
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if [[ "${d}" == "${swift_dir}"* ]]; then
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echo "${f}"
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fi
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done
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}
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# @FUNCTION: current_target_index
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# @USAGE: <target identifier>...
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# @DESCRIPTION:
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# Returns the index of the currently-set target from the given list of available
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# Swift targets. If `/usr/bin/swift` does not point to any of the given Swift
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# targets, returns an empty string.
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current_target_index() {
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local t canonical_targets=()
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for t in "$@"; do
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canonical_targets+=("$(canonicalise "${BIN_DIR}/${t}")")
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done
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local canonical_swift_path="$(canonicalise "${BIN_DIR}/swift")"
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get_index "${canonical_swift_path}" "${canonical_targets[@]}"
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}
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# @FUNCTION: current_target
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# @USAGE: <target identifier>...
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# @DESCRIPTION:
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# Returns the target identifier of the currently-set target from the given list
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# of available Swift targets. If `/usr/bin/swift` does not point to any of the
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# given Swift targets, returns an empty string.
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current_target() {
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local targets=( "$@" )
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local target="$(current_target_index "${targets[@]}")"
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if is_number "${target}"; then
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echo "${targets[target]}"
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else
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return 1
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fi
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}
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# @FUNCTION: unset_target
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# @USAGE: <target identifier>
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# @DESCRIPTION:
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# Unsets any unversioned links in `BIN_DIR` if they point to the given Swift
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# target identifier.
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unset_target() {
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local target="$1"
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local version_number="${target#swift-}"
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local links
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mapfile -t links < <(list_target_links "${target}")
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local link
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for link in "${links[@]}"; do
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local unversioned_link="${link%-"${version_number}"}"
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if [[ "$(canonicalise "${link}")" = "$(canonicalise "${unversioned_link}")" ]]; then
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rm "${unversioned_link}" || die -q "Couldn't remove symlink '${unversioned_link}'"
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fi
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done
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}
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# @FUNCTION: set_target
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# @USAGE: <target identifier> <target identifiers>...
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# @DESCRIPTION:
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# Unsets the current Swift target and sets unversioned symlinks in `BIN_DIR` for
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# the given Swift target identifier. Does nothing if the given target identifier
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# is the same as the current target identifier.
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set_target() {
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local target="$1"
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shift
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local current_target="$(current_target "$@")"
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if [[ "${target}" = "${current_target}" ]]; then
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return
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fi
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unset_target "${current_target}"
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local version_number="${target#swift-}"
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local links
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mapfile -t links < <(list_target_links "${target}")
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local link
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for link in "${links[@]}"; do
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local unversioned_link="${link%-"${version_number}"}"
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ln -fs "${link}" "${unversioned_link}" || die -q "Couldn't create symlink '${unversioned_link}'"
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done
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}
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### List Action ###
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describe_list() {
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echo "Lists available Swift versions"
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}
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do_list() {
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local targets
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mapfile -t targets < <(list_targets)
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if [[ -n "${targets}" ]]; then
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local current_target="$(current_target_index "${targets[@]}")"
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if is_number "${current_target}"; then
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targets[current_target]="$(highlight_marker "${targets[current_target]}")"
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fi
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write_list_start "Available Swift versions:"
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write_numbered_list "${targets[@]}"
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else
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write_list_start "No available Swift versions"
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fi
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}
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### Show Action ###
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describe_show() {
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echo "Show the current Swift implementation"
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}
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describe_show_options() {
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echo "--latest : Show the latest available Swift implementation"
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}
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do_show() {
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local show_latest=false
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if [[ $# -gt 0 && "$1" = "--latest" ]]; then
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show_latest=true
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shift
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fi
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[[ $# -eq 0 ]] || die "'show' takes only '--latest' as a parameter"
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local targets
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mapfile -t targets < <(list_targets)
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if [[ -z "${targets[@]}" ]]; then
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write_list_start "No available Swift versions"
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elif [[ "${show_latest}" = 'true' ]]; then
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write_list_start "Latest Swift implementation:"
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write_kv_list_entry "${targets[-1]}"
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else
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write_list_start "Current Swift implementation:"
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local target="$(current_target "${targets[@]}")"
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write_kv_list_entry "${target:-(unset)}"
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fi
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}
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### Set Action ###
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describe_set() {
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echo "Set active Swift version"
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}
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describe_set_parameters() {
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echo "<target>"
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}
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describe_set_options() {
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echo "target : Target number or name (from 'list')"
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}
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do_set() {
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[[ $# -eq 0 || -z "$1" ]] && die -q "No Swift version specified"
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[[ $# -gt 1 ]] && die -q "'set' takes only one parameter"
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local targets
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mapfile -t targets < <(list_targets)
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local target="$1"
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if is_number "${target}"; then
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[[ "$target" -gt 0 && "$1" -le "${#targets[@]}" ]] || die -q "'$1' is not a valid target"
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target="${targets[target-1]}"
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else
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target_index="$(get_index "$1" "${targets[@]}")"
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is_number "${target_index}" || die -q "'$1' is not a valid target"
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fi
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set_target "${target}" "${targets[@]}"
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}
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### Unset Action ###
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describe_unset() {
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echo "Unsets any active Swift version"
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}
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do_unset() {
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[[ $# -eq 0 ]] || die -q "'unset' does not take any parameters"
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local targets
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mapfile -t targets < <(list_targets)
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local target="$(current_target "${targets[@]}")"
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unset_target "${target}"
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}
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### Update Action ###
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describe_update() {
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echo "Switch to the most recent Swift version"
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}
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do_update() {
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[[ $# -eq 0 ]] || die -q "'update' does not take any parameters"
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local targets
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mapfile -t targets < <(list_targets)
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[[ "${#targets[@]}" -gt 0 ]] || die -q "No Swift versions found"
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local target="$(current_target "${targets[@]}")"
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if [[ -n "${target}" ]]; then
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unset_target "${target}"
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fi
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local new_target="${targets[-1]}"
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set_target "${new_target}" "${targets[@]}"
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}
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