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dcba8b4064
The syntax `head -NUM` was deprecated in the POSIX standard. https://pubs.opengroup.org/onlinepubs/9699919799/utilities/head.html
109 lines
2.3 KiB
Bash
Executable file
109 lines
2.3 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Summary: List installed Ruby versions
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# Usage: rbenv versions [--bare] [--skip-aliases]
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#
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# Lists all Ruby versions found in `$RBENV_ROOT/versions/*'.
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set -e
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[ -n "$RBENV_DEBUG" ] && set -x
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unset bare
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unset skip_aliases
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# Provide rbenv completions
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for arg; do
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case "$arg" in
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--complete )
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echo --bare
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echo --skip-aliases
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exit ;;
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--bare ) bare=1 ;;
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--skip-aliases ) skip_aliases=1 ;;
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* )
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rbenv-help --usage versions >&2
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exit 1
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;;
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esac
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done
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versions_dir="${RBENV_ROOT}/versions"
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if ! enable -f "${BASH_SOURCE%/*}"/rbenv-realpath.dylib realpath 2>/dev/null; then
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if [ -n "$RBENV_NATIVE_EXT" ]; then
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echo "rbenv: failed to load \`realpath' builtin" >&2
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exit 1
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fi
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READLINK=$(type -p greadlink readlink 2>/dev/null | head -n1)
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if [ -z "$READLINK" ]; then
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echo "rbenv: cannot find readlink - are you missing GNU coreutils?" >&2
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exit 1
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fi
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resolve_link() {
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$READLINK "$1"
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}
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realpath() {
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local cwd="$PWD"
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local path="$1"
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local name
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while [ -n "$path" ]; do
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name="${path##*/}"
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[ "$name" = "$path" ] || cd "${path%/*}"
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path="$(resolve_link "$name" || true)"
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done
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echo "${PWD}/$name"
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cd "$cwd"
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}
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fi
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if [ -d "$versions_dir" ]; then
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versions_dir="$(realpath "$versions_dir")"
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fi
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if [ -n "$bare" ]; then
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hit_prefix=""
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miss_prefix=""
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current_version=""
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include_system=""
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else
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hit_prefix="* "
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miss_prefix=" "
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current_version="$(rbenv-version-name || true)"
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include_system="1"
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fi
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num_versions=0
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print_version() {
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if [ "$1" == "$current_version" ]; then
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echo "${hit_prefix}$(rbenv-version 2>/dev/null)"
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else
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echo "${miss_prefix}$1"
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fi
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num_versions=$((num_versions + 1))
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}
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# Include "system" in the non-bare output, if it exists
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if [ -n "$include_system" ] && RBENV_VERSION=system rbenv-which ruby >/dev/null 2>&1; then
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print_version system
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fi
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shopt -s nullglob
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for path in "$versions_dir"/*; do
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if [ -d "$path" ]; then
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if [ -n "$skip_aliases" ] && [ -L "$path" ]; then
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target="$(realpath "$path")"
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[ "${target%/*}" != "$versions_dir" ] || continue
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fi
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print_version "${path##*/}"
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fi
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done
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shopt -u nullglob
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if [ "$num_versions" -eq 0 ] && [ -n "$include_system" ]; then
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echo "Warning: no Ruby detected on the system" >&2
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exit 1
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fi
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