rar: add update script

pkgs/tools/archivers/rar/update.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl gnused jq
+
+set -euo pipefail
+
+DIRNAME=$(dirname "$0")
+readonly DIRNAME
+readonly NIXPKGS_ROOT="../../../.."
+readonly NIX_FLAGS=(--extra-experimental-features 'nix-command flakes')
+
+updateHash()
+{
+    local -r version="${1//./}"
+    local -r arch="$2"
+    local -r os="$3"
+    local -r nix_arch="$4"
+
+    url="https://www.rarlab.com/rar/rar$os-$arch-$version.tar.gz"
+    hash=$(nix store prefetch-file --json "$url" | jq -r .hash)
+    currentHash=$(cd "$DIRNAME" && nix "${NIX_FLAGS[@]}" eval --raw "$NIXPKGS_ROOT#legacyPackages.$nix_arch.rar.src.outputHash")
+
+    sed -i "s|$currentHash|$hash|g" "$DIRNAME/default.nix"
+}
+
+updateVersion()
+{
+    local -r version="$1"
+    sed -i "s|version = \"[0-9.]*\";|version = \"$version\";|g" "$DIRNAME/default.nix"
+}
+
+# TODO: get latest version
+readonly latestVersion="${1:-}"
+
+if [[ -z "$latestVersion" ]]; then
+    echo "usage: $0 <version to update>"
+    exit 1
+fi
+
+currentVersion=$(cd "$DIRNAME" && nix "${NIX_FLAGS[@]}" eval --raw "$NIXPKGS_ROOT#legacyPackages.x86_64-linux.rar.version")
+readonly currentVersion
+
+if [[ "$currentVersion" == "$latestVersion" ]]; then
+    echo "rar is up-to-date: ${currentVersion}"
+    exit 0
+fi
+
+updateHash "$latestVersion" x32 linux i686-linux
+updateHash "$latestVersion" x64 linux x86_64-linux
+updateHash "$latestVersion" arm macos aarch64-darwin
+updateHash "$latestVersion" x64 macos x86_64-darwin
+
+updateVersion "$latestVersion"