From 30c667ec3a11ef4fdf4a681112be7c293fecebe5 Mon Sep 17 00:00:00 2001
From: Marco Ippolito <marcoippolito54@gmail.com>
Date: Fri, 31 Mar 2023 10:31:01 +0200
Subject: [PATCH] tools: automate brotli update

PR-URL: https://github.com/nodejs/node/pull/47205
Refs: https://github.com/nodejs/security-wg/issues/828
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Adrian Estrada <edsadr@gmail.com>
---
 .github/workflows/tools.yml         |  8 +++
 tools/dep_updaters/update-brotli.sh | 75 +++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+)
 create mode 100755 tools/dep_updaters/update-brotli.sh

diff --git a/.github/workflows/tools.yml b/.github/workflows/tools.yml
index 0865467060bde1..0ee2cfc758f757 100644
--- a/.github/workflows/tools.yml
+++ b/.github/workflows/tools.yml
@@ -159,6 +159,14 @@ jobs:
               cat temp-output
               tail -n1 temp-output | grep "NEW_VERSION=" >> "$GITHUB_ENV" || true
               rm temp-output
+          - id: brotli
+            subsystem: deps
+            label: dependencies
+            run: |
+              ./tools/dep_updaters/update-brotli.sh > temp-output
+              cat temp-output
+              tail -n1 temp-output | grep "NEW_VERSION=" >> "$GITHUB_ENV" || true
+              rm temp-output
     steps:
       - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c  # v3.3.0
         with:
diff --git a/tools/dep_updaters/update-brotli.sh b/tools/dep_updaters/update-brotli.sh
new file mode 100755
index 00000000000000..651ae57d3f2e62
--- /dev/null
+++ b/tools/dep_updaters/update-brotli.sh
@@ -0,0 +1,75 @@
+#!/bin/sh
+set -e
+# Shell script to update brotli in the source tree to a specific version
+
+BASE_DIR=$(cd "$(dirname "$0")/../.." && pwd)
+DEPS_DIR="$BASE_DIR/deps"
+
+[ -z "$NODE" ] && NODE="$BASE_DIR/out/Release/node"
+[ -x "$NODE" ] || NODE=$(command -v node)
+
+NEW_VERSION="$("$NODE" --input-type=module <<'EOF'
+const res = await fetch('https://api.github.com/repos/google/brotli/releases/latest');
+if (!res.ok) throw new Error(`FetchError: ${res.status} ${res.statusText}`, { cause: res });
+const { tag_name } = await res.json();
+console.log(tag_name.replace('v', ''));
+EOF
+)"
+
+VERSION_HEX=$(grep "#define BROTLI_VERSION" ./deps/brotli/c/common/version.h | sed 's/.* //')
+
+major=$(( ($VERSION_HEX >> 24) & 0xff ))
+minor=$(( ($VERSION_HEX >> 12) & 0xfff ))
+patch=$(( $VERSION_HEX & 0xfff ))
+CURRENT_VERSION="${major}.${minor}.${patch}"
+
+echo "Comparing $NEW_VERSION with $CURRENT_VERSION"
+
+if [ "$NEW_VERSION" = "$CURRENT_VERSION" ]; then
+  echo "Skipped because brotli is on the latest version."
+  exit 0
+fi
+
+echo "Making temporary workspace"
+
+WORKSPACE=$(mktemp -d 2> /dev/null || mktemp -d -t 'tmp')
+
+cleanup () {
+  EXIT_CODE=$?
+  [ -d "$WORKSPACE" ] && rm -rf "$WORKSPACE"
+  exit $EXIT_CODE
+}
+
+trap cleanup INT TERM EXIT
+
+cd "$WORKSPACE"
+
+BROTLI_TARBALL="v$NEW_VERSION.tar.gz"
+
+echo "Fetching brotli source archive"
+curl -sL -o "$BROTLI_TARBALL" "https://github.com/google/brotli/archive/$BROTLI_TARBALL"
+gzip -dc "$BROTLI_TARBALL" | tar xf -
+rm "$BROTLI_TARBALL"
+mv "brotli-$NEW_VERSION" "brotli"
+
+echo "Copying existing gyp file"
+cp "$DEPS_DIR/brotli/brotli.gyp" "$WORKSPACE/brotli"
+
+echo "Deleting existing brotli"
+rm -rf "$DEPS_DIR/brotli"
+mkdir "$DEPS_DIR/brotli"
+
+echo "Update c and LICENSE"
+mv "$WORKSPACE/brotli/c" "$WORKSPACE/brotli/LICENSE" "$WORKSPACE/brotli/brotli.gyp" "$DEPS_DIR/brotli"
+
+echo "All done!"
+echo ""
+echo "Please git add brotli, commit the new version:"
+echo ""
+echo "$ git add -A deps/brotli"
+echo "$ git commit -m \"deps: update brotli to $NEW_VERSION\""
+echo ""
+
+# The last line of the script should always print the new version,
+# as we need to add it to $GITHUB_ENV variable.
+echo "NEW_VERSION=$NEW_VERSION"