mirror of
https://github.com/LnL7/nix-darwin.git
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77 lines
1.5 KiB
Bash
Executable file
77 lines
1.5 KiB
Bash
Executable file
#! @shell@
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set -e
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set -o pipefail
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export PATH=@path@:$PATH
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evalNix() {
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nix-instantiate --eval --strict "${extraEvalFlags[@]}" -E "with import <darwin> {}; $*"
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}
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evalAttrs() {
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evalNix "builtins.concatStringsSep \"\\n\" (builtins.attrNames $*)"
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}
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evalOpt() {
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evalNix "options.$option.$*" 2>/dev/null
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}
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evalOptText() {
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eval printf "$(evalNix "options.$option.$*" 2>/dev/null)" 2>/dev/null
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echo
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}
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showSyntax() {
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echo "$0: [-I path] <option>" >&2
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eval printf "$(evalAttrs "options")"
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echo
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exit 1
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}
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# Parse the command line.
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origArgs=("$@")
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extraEvalFlags=()
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option=
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while [ "$#" -gt 0 ]; do
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i="$1"; shift 1
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case "$i" in
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--help)
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showSyntax
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;;
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-I)
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if [ -z "$1" ]; then
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echo "$0: ‘$i’ requires an argument"
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exit 1
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fi
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j="$1"; shift 1
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extraEvalFlags+=("$i" "$j")
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;;
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*)
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option="$i"
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;;
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esac
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done
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if [ -z "$option" ]; then showSyntax; fi
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if [ "$(evalOpt "_type")" = '"option"' ]; then
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echo "Value:"
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evalOpt "value" || echo "no value"
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echo
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echo "Default:"
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evalOpt "default" || evalOptText "defaultText" || echo "no default"
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echo
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echo "Example:"
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if [ "$(evalOpt "example._type")" = '"literalExample"' ]; then
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evalOptText "example.text" || echo "no example"
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else
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evalOpt "example" || echo "no example"
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fi
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echo
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echo "Description:"
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evalOptText "description" || echo "no description"
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echo
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else
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eval printf "$(evalAttrs "options.$option")" 2>/dev/null
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echo
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fi
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