sonic-pi: add updateScript

pkgs/applications/audio/sonic-pi/default.nix

@@ -216,6 +216,8 @@ stdenv.mkDerivation rec {
     })
   ];
 
+  passthru.updateScript = ./update.sh;
+
   meta = with lib; {
     homepage = "https://sonic-pi.net/";
     description = "Free live coding synth for everyone originally designed to support computing and music lessons within schools";

pkgs/applications/audio/sonic-pi/update.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p nix jq common-updater-scripts
+
+set -euo pipefail
+
+nixpkgs="$(git rev-parse --show-toplevel || (printf 'Could not find root of nixpkgs repo\nAre we running from within the nixpkgs git repo?\n' >&2; exit 1))"
+
+stripwhitespace() {
+    sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//'
+}
+
+nixeval() {
+    nix --extra-experimental-features nix-command eval --json --impure -f "$nixpkgs" "$1" | jq -r .
+}
+
+vendorhash() {
+    (nix --extra-experimental-features nix-command build --impure --argstr nixpkgs "$nixpkgs" --argstr attr "$1" --expr '{ nixpkgs, attr }: let pkgs = import nixpkgs {}; in with pkgs.lib; (getAttrFromPath (splitString "." attr) pkgs).overrideAttrs (attrs: { outputHash = fakeHash; })' --no-link 2>&1 >/dev/null | tail -n3 | grep -F got: | cut -d: -f2- | stripwhitespace) 2>/dev/null || true
+}
+
+findpath() {
+    path="$(nix --extra-experimental-features nix-command eval --json --impure -f "$nixpkgs" "$1.meta.position" | jq -r . | cut -d: -f1)"
+    outpath="$(nix --extra-experimental-features nix-command eval --json --impure --expr "builtins.fetchGit \"$nixpkgs\"")"
+
+    if [ -n "$outpath" ]; then
+        path="${path/$(echo "$outpath" | jq -r .)/$nixpkgs}"
+    fi
+
+    echo "$path"
+}
+
+attr="${UPDATE_NIX_ATTR_PATH:-sonic-pi}"
+version="$(cd "$nixpkgs" && list-git-tags --pname="$(nixeval "$attr".pname)" --attr-path="$attr" | grep '^v' | sed -e 's|^v||' | sort -V | tail -n1)"
+
+pkgpath="$(findpath "$attr")"
+
+updated="$(cd "$nixpkgs" && update-source-version "$attr" "$version" --file="$pkgpath" --print-changes | jq -r length)"
+
+if [ "$updated" -eq 0 ]; then
+    echo 'update.sh: Package version not updated, nothing to do.'
+    exit 0
+fi
+
+curhash="$(nixeval "$attr.mixFodDeps.outputHash")"
+newhash="$(vendorhash "$attr.mixFodDeps")"
+
+if [ -n "$newhash" ] && [ "$curhash" != "$newhash" ]; then
+    sed -i -e "s|\"$curhash\"|\"$newhash\"|" "$pkgpath"
+else
+    echo 'update.sh: New vendorHash same as old vendorHash, nothing to do.'
+fi