mirror of
https://github.com/Ahwxorg/nixos-config.git
synced 2025-12-04 15:00:13 +01:00
74 lines
2 KiB
Bash
74 lines
2 KiB
Bash
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#! /usr/bin/env nix-shell
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#! nix-shell -i bash -p
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# shellcheck shell=bash
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set -euo pipefail
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PKG_NAME="$1"
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FLAKE="$2"
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FLAKE_PATH="${FLAKE}#${PKG_NAME}"
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removeQuotes() {
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local flag="$*"
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flag="${flag%\"}"
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echo "${flag#\"}"
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}
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newlinesToCommaSeperated() {
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echo "$@" | sed ':a;N;$!ba;s/\n/, /g'
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}
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evalAttr() {
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local attr data
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attr="$1"
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data="$(nix eval "$FLAKE_PATH"."$attr" 2>/dev/null)"
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[[ $data != "null" && $data != "false" && -n $data ]] && removeQuotes "$data"
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}
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evalJsonAttr() {
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local attr jqArgs data
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attr="$1"
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jqArgs="$2"
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data="$(nix eval --json "$FLAKE_PATH"."$attr" 2>/dev/null | jq -r "$jqArgs")"
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[[ $data != "null" && -n $data ]] && echo "$data"
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}
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evalNixpkgsLib() {
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local function data
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function="$1"
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# Impure is needed to import the flake reference
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data="$(nix eval --raw --impure --expr "let pkgs = (builtins.getFlake \"flake:$FLAKE\"); in pkgs.lib.$function pkgs.$PKG_NAME" 2>/dev/null)"
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[[ $data != "null" && -n $data ]] && echo "$data"
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}
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maybeEcho() {
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local -r prefix="$1"
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local flag="$2"
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local -r commaSeperated="${3:-false}"
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[[ $commaSeperated == "true" ]] && flag="$(newlinesToCommaSeperated "$flag")"
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test -n "$flag" && echo "$prefix $flag"
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}
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test -n "$(evalAttr "meta.broken")" && echo "broken: true"
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test -n "$(evalAttr "meta.insecure")" && echo "insecure: true"
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version="$(evalAttr "version")"
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# Derive the version from "name" using 'lib.getVersion' if it's not set
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test -z "$version" && version="$(evalNixpkgsLib "getVersion")"
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maybeEcho "version:" "$version"
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homepage="$(evalAttr "meta.homepage")"
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maybeEcho "homepage:" "$homepage"
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description="$(evalAttr "meta.description")"
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maybeEcho "description:" "$description"
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license="$(evalJsonAttr "meta.license" 'if type=="array" then .[].fullName else .fullName end')"
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maybeEcho "license:" "$license" true
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maintainers="$(evalJsonAttr "meta.maintainers" '.[].github')"
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maybeEcho "maintainers:" "$maintainers" true
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platforms="$(evalJsonAttr "meta.platforms" 'if type=="array" then .[] else . end')"
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maybeEcho "platforms:" "$platforms" true
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