tools: automate cares update

.github/workflows/tools.yml

@@ -163,6 +163,14 @@ jobs:
                 echo "NEW_VERSION=$NEW_VERSION" >> $GITHUB_ENV
                 ./tools/update-llhttp.sh "$NEW_VERSION"
               fi
+          - id: c-ares
+            subsystem: deps
+            label: dependencies
+            run: |
+              ./tools/dep_updaters/update-c-ares.sh > temp-output
+              cat temp-output
+              tail -n1 temp-output | grep "NEW_VERSION=" >> "$GITHUB_ENV" || true
+              rm temp-output
     steps:
       - uses: actions/checkout@v3
         with:

doc/contributing/maintaining-c-ares.md

@@ -13,19 +13,19 @@ Updates to the c-ares dependency involve the following steps:
 
 ## Running the update script
 
-The `tools/update-cares.sh` script automates the update of the c-ares source
-files, preserving the existing files added by Node.js.
+The `tools/dep_updaters/update-c-ares.sh` script automates the update of
+the c-ares source files, preserving the existing files added by Node.js.
 
 In the following examples, `x.y.z` should match the c-ares version to update to.
 
 ```console
-./tools/update-cares.sh x.y.z
+./tools/dep_updaters/update-c-ares.sh x.y.z
 ```
 
 e.g.
 
 ```console
-./tools/update-cares.sh 1.18.1
+./tools/dep_updaters/update-c-ares.sh 1.18.1
 ```
 
 ## Check that Node.js still builds and tests

tools/dep_updaters/update-c-ares.sh

@@ -0,0 +1,73 @@
+#!/bin/sh
+set -e
+# Shell script to update c-ares 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/c-ares/c-ares/releases/latest');
+if (!res.ok) throw new Error(`FetchError: ${res.status} ${res.statusText}`, { cause: res });
+const { tag_name } = await res.json();
+console.log(tag_name.replace('cares-', '').replaceAll('_', '.'));
+EOF
+)"
+
+CURRENT_VERSION=$(grep "#define ARES_VERSION_STR" ./deps/cares/include/ares_version.h |  sed -n "s/^.*VERSION_STR \"\(.*\)\"/\1/p")
+
+echo "Comparing $NEW_VERSION with $CURRENT_VERSION"
+
+if [ "$NEW_VERSION" = "$CURRENT_VERSION" ]; then
+  echo "Skipped because c-ares is on the latest version."
+  exit 0
+fi
+
+echo "Making temporary workspace"
+
+WORKSPACE=$(mktemp -d 2> /dev/null || mktemp -d -t 'tmp')
+
+cleanup () {
+  EXIT_CODE=$?
+  [ -d "$WORKSPACE" ] && rm -rf "$WORKSPACE"
+  exit $EXIT_CODE
+}
+
+trap cleanup INT TERM EXIT
+
+ARES_REF="cares-$(echo "$NEW_VERSION" | tr . _)"
+ARES_TARBALL="c-ares-$NEW_VERSION.tar.gz"
+
+cd "$WORKSPACE"
+
+echo "Fetching c-ares source archive"
+curl -sL -o "$ARES_TARBALL" "https://github.com/c-ares/c-ares/releases/download/$ARES_REF/$ARES_TARBALL"
+gzip -dc "$ARES_TARBALL" | tar xf -
+rm "$ARES_TARBALL"
+mv "c-ares-$NEW_VERSION" cares
+
+echo "Removing tests"
+rm -rf "$WORKSPACE/cares/test"
+
+echo "Copying existing .gitignore, config and gyp files"
+cp -R "$DEPS_DIR/cares/config" "$WORKSPACE/cares"
+cp "$DEPS_DIR/cares/.gitignore" "$WORKSPACE/cares"
+cp "$DEPS_DIR/cares/cares.gyp" "$WORKSPACE/cares"
+
+echo "Replacing existing c-ares"
+rm -rf "$DEPS_DIR/cares"
+mv "$WORKSPACE/cares" "$DEPS_DIR/"
+
+echo "All done!"
+echo ""
+echo "Please git add c-ares, commit the new version:"
+echo ""
+echo "$ git add -A deps/cares"
+echo "$ git commit -m \"deps: update c-ares 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"