From 31d520ee18a6ec3b95feac69d5d359bbe279361b Mon Sep 17 00:00:00 2001
From: Tom van Dijk <18gatenmaker6@gmail.com>
Date: Fri, 16 May 2025 23:57:57 +0200
Subject: [PATCH] element-{desktop,web-unwrapped}: {fix,modernize} update
 script

- Does not fetch `-rc` versions anymore
- Fixes weird output by `prefetch-yarn-deps` (see https://github.com/NixOS/nixpkgs/pull/407704#issue-3069691545)
- Doesn't create any temporary files anymore, since everything is
  prefetched local builds will be faster too
- DRY
---
 pkgs/by-name/el/element-desktop/update.sh | 61 +++++++++++------------
 1 file changed, 28 insertions(+), 33 deletions(-)

diff --git a/pkgs/by-name/el/element-desktop/update.sh b/pkgs/by-name/el/element-desktop/update.sh
index 20251b2644a4..ca573c6e994c 100755
--- a/pkgs/by-name/el/element-desktop/update.sh
+++ b/pkgs/by-name/el/element-desktop/update.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i bash -p nix wget prefetch-yarn-deps nix-prefetch-github jq
+#!nix-shell -i bash -p nix coreutils prefetch-yarn-deps jq curl
 
 if [ "$#" -gt 1 ] || [[ "$1" == -* ]]; then
   echo "Regenerates packaging data for the element packages."
@@ -12,54 +12,49 @@ version="$1"
 set -euo pipefail
 
 if [ -z "$version" ]; then
-  version="$(wget -q -O- "https://api.github.com/repos/element-hq/element-desktop/releases?per_page=1" | jq -r '.[0].tag_name')"
+  version="$(curl -fsSL "https://api.github.com/repos/element-hq/element-desktop/releases/latest" | jq -r '.tag_name')"
 fi
 
 # strip leading "v"
 version="${version#v}"
 
-# Element Web
-web_src="https://raw.githubusercontent.com/element-hq/element-web/v$version"
-web_src_hash=$(nix-prefetch-github element-hq element-web --rev v${version} | jq -r .hash)
-
 cd "$(dirname "${BASH_SOURCE[0]}")" || exit 1
 
-web_tmpdir=$(mktemp -d)
-trap 'rm -rf "$web_tmpdir"' EXIT
+nixflags=(
+  --extra-experimental-features
+  "nix-command flakes"
+)
 
-pushd $web_tmpdir
-wget -q "$web_src/yarn.lock"
-web_yarn_hash=$(prefetch-yarn-deps yarn.lock)
-popd
+# HACK: prefetch-yarn-deps hashes may output extra clutter on stdout (!) so
+# we'll need to get the last line, last word
+fixupHash() {
+  local sorta_yarn_hash="$(tail -n1 <<< "$1")"
+  local almost_yarn_hash="${sorta_yarn_hash##* }"
+  local yarn_hash="$(nix "${nixflags[@]}" hash convert --hash-algo sha256 "$almost_yarn_hash")"
 
-# Element Desktop
-desktop_src="https://raw.githubusercontent.com/element-hq/element-desktop/v$version"
-desktop_src_hash=$(nix-prefetch-github element-hq element-desktop --rev v${version} | jq -r .hash)
+  printf "%s" "$yarn_hash"
+}
 
-desktop_tmpdir=$(mktemp -d)
-trap 'rm -rf "$desktop_tmpdir"' EXIT
+getHashes() {
+  variant="$1"
+  output="$2"
 
-pushd $desktop_tmpdir
-wget -q "$desktop_src/yarn.lock"
-desktop_yarn_hash=$(prefetch-yarn-deps yarn.lock)
-popd
+  local url="github:element-hq/element-$variant/v$version"
+  local src="$(nix "${nixflags[@]}" flake prefetch --json "$url")"
+  local src_hash="$(jq -r ".hash" <<< "$src")"
+  local src_path="$(jq -r ".storePath" <<< "$src")"
+  local yarn_hash="$(fixupHash "$(prefetch-yarn-deps "$src_path/yarn.lock")")"
 
-cat > ../element-web-unwrapped/element-web-pin.nix << EOF
+  cat > "$output" << EOF
 {
   "version" = "$version";
   "hashes" = {
-    "webSrcHash" = "$web_src_hash";
-    "webYarnHash" = "$web_yarn_hash";
+    "${variant}SrcHash" = "$src_hash";
+    "${variant}YarnHash" = "$yarn_hash";
   };
 }
 EOF
+}
 
-cat > element-desktop-pin.nix << EOF
-{
-  "version" = "$version";
-  "hashes" = {
-    "desktopSrcHash" = "$desktop_src_hash";
-    "desktopYarnHash" = "$desktop_yarn_hash";
-  };
-}
-EOF
+getHashes web ../element-web-unwrapped/element-web-pin.nix
+getHashes desktop element-desktop-pin.nix