Meta+Toolchain+CI: Add a script to bootstrap vcpkg

And hook it into ladybird.sh for convenience. The script will set up
PATH and other environment variables automatically.

On CI, vcpkg is theoretically already installed on Linux machines, but
not with the right environment variables, and not on macOS. So this also
makes CI use this script to bootstrap vcpkg.

.github/actions/setup/action.yml

@@ -60,3 +60,7 @@ runs:
         set -e
         brew update
         brew install coreutils bash ninja wabt ccache unzip qt llvm@18
+
+    - name: 'Install vcpkg'
+      shell: bash
+      run: ./Toolchain/BuildVcpkg.sh

.github/workflows/lagom-template.yml

@@ -22,6 +22,7 @@ env:
   # github.workspace = /home/runner/work/serenity/serenity
   LADYBIRD_SOURCE_DIR: ${{ github.workspace }}
   CCACHE_DIR: ${{ github.workspace }}/.ccache
+  VCPKG_ROOT:  ${{ github.workspace }}/Toolchain/Tarballs/vcpkg
 
 jobs:
   CI:

.github/workflows/nightly-android.yml

@@ -10,6 +10,7 @@ env:
   # github.workspace = /home/runner/work/serenity/serenity
   LADYBIRD_SOURCE_DIR: ${{ github.workspace }}
   CCACHE_DIR: ${{ github.workspace }}/.ccache
+  VCPKG_ROOT:  ${{ github.workspace }}/Toolchain/Tarballs/vcpkg
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || format('{0}-{1}', github.ref, github.run_number) }}

.github/workflows/serenity-js-artifacts.yml

@@ -5,6 +5,7 @@ on: [push]
 env:
   LADYBIRD_SOURCE_DIR: ${{ github.workspace }}
   SERENITY_CCACHE_DIR: ${{ github.workspace }}/.ccache
+  VCPKG_ROOT:  ${{ github.workspace }}/Toolchain/Tarballs/vcpkg
 
 jobs:
   build-and-package:

Meta/ladybird.sh

@@ -83,7 +83,9 @@ cmd_with_target() {
     BUILD_DIR="$LADYBIRD_SOURCE_DIR/Build/ladybird"
     CMAKE_ARGS+=("-DCMAKE_INSTALL_PREFIX=$LADYBIRD_SOURCE_DIR/Build/lagom-install")
     CMAKE_ARGS+=("-DSERENITY_CACHE_DIR=${LADYBIRD_SOURCE_DIR}/Build/caches")
-    export PATH="$LADYBIRD_SOURCE_DIR/Toolchain/Local/cmake/bin":$PATH
+
+    export PATH="$LADYBIRD_SOURCE_DIR/Toolchain/Local/cmake/bin:$LADYBIRD_SOURCE_DIR/Toolchain/Local/vcpkg/bin:$PATH"
+    export VCPKG_ROOT="$LADYBIRD_SOURCE_DIR/Toolchain/Tarballs/vcpkg"
 }
 
 ensure_target() {
@@ -124,10 +126,20 @@ build_cmake() {
     ( cd "$LADYBIRD_SOURCE_DIR/Toolchain" && ./BuildCMake.sh )
 }
 
+build_vcpkg() {
+    echo "Building vcpkg"
+    ( cd "$LADYBIRD_SOURCE_DIR/Toolchain" && ./BuildVcpkg.sh )
+}
+
 ensure_toolchain() {
     if [ "$(cmake -P "$LADYBIRD_SOURCE_DIR"/Meta/CMake/cmake-version.cmake)" -ne 1 ]; then
         build_cmake
     fi
+
+    # FIXME: Add a version check if needed.
+    if [ ! -x "${LADYBIRD_SOURCE_DIR}/Toolchain/Local/vcpkg/bin/vcpkg" ]; then
+        build_vcpkg
+    fi
 }
 
 run_gdb() {
@@ -179,6 +191,7 @@ build_and_run_lagom_target() {
 if [[ "$CMD" =~ ^(build|install|run|gdb|test|rebuild|recreate|addr2line)$ ]]; then
     cmd_with_target
     [[ "$CMD" != "recreate" && "$CMD" != "rebuild" ]] || delete_target
+    ensure_toolchain
     ensure_target
     case "$CMD" in
         build)

Toolchain/BuildVcpkg.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+# This script builds the vcpkg dependency management system
+set -e
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+# shellcheck source=/dev/null
+. "${DIR}/../Meta/shell_include.sh"
+
+exit_if_running_as_root "Do not run BuildVcpkg.sh as root, parts of your Toolchain directory will become root-owned"
+
+GIT_REPO="https://github.com/microsoft/vcpkg.git"
+GIT_REV="01f602195983451bc83e72f4214af2cbc495aa94" # 2024.05.24
+PREFIX_DIR="$DIR/Local/vcpkg"
+
+mkdir -p "$DIR/Tarballs"
+pushd "$DIR/Tarballs"
+    [ ! -d vcpkg ] && git clone $GIT_REPO
+
+    cd vcpkg
+    git fetch origin
+    git checkout $GIT_REV
+
+    ./bootstrap-vcpkg.sh -disableMetrics
+
+    mkdir -p "$PREFIX_DIR/bin"
+    cp vcpkg "$PREFIX_DIR/bin"
+popd