tools: automate zlib update

.github/workflows/tools.yml

@@ -198,6 +198,14 @@ jobs:
               cat temp-output
               tail -n1 temp-output | grep "NEW_VERSION=" >> "$GITHUB_ENV" || true
               rm temp-output
+          - id: zlib
+            subsystem: deps
+            label: dependencies
+            run: |
+              ./tools/dep_updaters/update-zlib.sh > temp-output
+              cat temp-output
+              tail -n1 temp-output | grep "NEW_VERSION=" >> "$GITHUB_ENV" || true
+              rm temp-output
     steps:
       - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c  # v3.3.0
         with:

tools/dep_updaters/update-zlib.sh

@@ -0,0 +1,64 @@
+#!/bin/sh
+set -e
+# Shell script to update zlib in the source tree to a specific version
+
+BASE_DIR=$(cd "$(dirname "$0")/../.." && pwd)
+DEPS_DIR="$BASE_DIR/deps"
+
+CURRENT_VERSION=$(grep "#define ZLIB_VERSION" "$DEPS_DIR/zlib/zlib.h" | sed -n "s/^.*VERSION \"\(.*\)\"/\1/p")
+
+NEW_VERSION_ZLIB_H=$(curl -s "https://chromium.googlesource.com/chromium/src/+/refs/heads/main/third_party/zlib/zlib.h?format=TEXT" | base64 --decode)
+
+NEW_VERSION=$(printf '%s' "$NEW_VERSION_ZLIB_H" | grep "#define ZLIB_VERSION" | sed -n "s/^.*VERSION \"\(.*\)\"/\1/p")
+
+echo "Comparing $NEW_VERSION with $CURRENT_VERSION"
+
+if [ "$NEW_VERSION" = "$CURRENT_VERSION" ]; then
+  echo "Skipped because zlib is on the latest version."
+  exit 0
+fi
+
+echo "Making temporary workspace..."
+
+WORKSPACE=$(mktemp -d 2> /dev/null || mktemp -d -t 'tmp')
+
+cd "$WORKSPACE"
+
+mkdir zlib
+
+ZLIB_TARBALL=zlib.tar.gz
+
+echo "Fetching zlib source archive"
+curl -sL -o $ZLIB_TARBALL https://chromium.googlesource.com/chromium/src/+archive/refs/heads/main/third_party/$ZLIB_TARBALL
+
+gzip -dc "$ZLIB_TARBALL" | tar xf - -C zlib/
+
+rm "$ZLIB_TARBALL"
+
+cp "$DEPS_DIR/zlib/zlib.gyp" "$DEPS_DIR/zlib/GN-scraper.py" "$DEPS_DIR/zlib/win32/zlib.def" "$DEPS_DIR"
+
+rm -rf "$DEPS_DIR/zlib" zlib/.git
+
+mv zlib "$DEPS_DIR/"
+
+mv "$DEPS_DIR/zlib.gyp" "$DEPS_DIR/GN-scraper.py" "$DEPS_DIR/zlib/"
+
+mkdir "$DEPS_DIR/zlib/win32"
+
+mv "$DEPS_DIR/zlib.def" "$DEPS_DIR/zlib/win32"
+
+perl -i -pe 's|^#include "chromeconf.h"|//#include "chromeconf.h"|' deps/zlib/zconf.h
+
+echo "All done!"
+echo ""
+echo "Make sure to update the deps/zlib/zlib.gyp if any significant changes have occurred upstream"
+echo ""
+echo "Please git add zlib, commit the new version:"
+echo ""
+echo "$ git add -A deps/zlib"
+echo "$ git commit -m \"deps: update zlib 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"