1 files changed, 78 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/tools/archivers/rar/update.sh b/nixpkgs/pkgs/tools/archivers/rar/update.sh
new file mode 100755
index 000000000000..f81562727f29
--- /dev/null
+++ b/nixpkgs/pkgs/tools/archivers/rar/update.sh
@@ -0,0 +1,78 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl gawk gnused pup jq
+
+set -euo pipefail
+
+DIRNAME=$(dirname "$0")
+readonly DIRNAME
+readonly NIXPKGS_ROOT="../../../.."
+readonly NIX_FLAGS=(--extra-experimental-features 'nix-command flakes')
+
+# awk is used for parsing the RARLAB website to get the newest version
+readonly AWK_FIELD_SEPARATOR='[-.]'
+# shellcheck disable=SC2016
+readonly AWK_COMMAND='
+# We will get the following output from pup:
+# /rar/rarlinux-x64-700b3.tar.gz
+# /rar/rarmacos-x64-700b3.tar.gz
+# /rar/rarlinux-x64-624.tar.gz
+# /rar/rarbsd-x64-624.tar.gz
+# /rar/rarmacos-x64-624.tar.gz
+
+# Ignore anything that is flagged as beta (e.g.: `/rar/rarlinux-x64-700b3.tar.gz`)
+!/[0-9]+b[0-9]*.tar.gz$/ {
+    # /rar/rarlinux-x64-624.tar.gz -> 624
+    val = $3
+    # Only get the value if it is bigger than the current one
+    if (val > max) max = val
+}
+END {
+    # 624 -> 6.24
+    printf "%.2f\n", max/100
+}
+'
+
+updateHash() {
+    local -r version="${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" "$DIRNAME/default.nix"
+}
+
+latestVersion="${1:-}"
+if [[ -z "$latestVersion" ]]; then
+    latestVersion=$(
+        curl --silent --location --fail https://www.rarlab.com/download.htm | \
+            pup 'a[href*=".tar.gz"] attr{href}' | \
+            awk -F"$AWK_FIELD_SEPARATOR" "$AWK_COMMAND"
+    )
+fi
+readonly latestVersion
+echo "Latest version: $latestVersion"
+
+currentVersion=$(cd "$DIRNAME" && nix "${NIX_FLAGS[@]}" eval --raw "$NIXPKGS_ROOT#legacyPackages.x86_64-linux.rar.version")
+readonly currentVersion
+echo "Current version: $currentVersion"
+
+if [[ "$currentVersion" == "$latestVersion" ]]; then
+    echo "rar is up-to-date"
+    exit 0
+fi
+
+updateHash "$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"