Add desktop Gecko vertical probe

tools/browser-desktop-build-probe.sh

@@ -0,0 +1,68 @@
+#!/bin/sh
+set -eu
+
+root="${AMPB_BROWSER_BUILD_ROOT:-/tmp/ampb-browser-build}"
+gecko_dir="$root/src/gecko-dev"
+mode="${AMPB_DESKTOP_BUILD_PROBE_MODE:-help}"
+log="$root/logs/gecko-desktop-mach-${mode}.log"
+mozconfig="$root/mozconfigs/desktop-debug.mozconfig"
+objdir="$root/obj/gecko-desktop-debug"
+
+if [ ! -d "$gecko_dir" ]; then
+  printf 'missing gecko checkout: %s\n' "$gecko_dir" >&2
+  exit 1
+fi
+
+mkdir -p "$root/cache/gradle"
+mkdir -p "$root/cache/mozbuild"
+mkdir -p "$root/cache/pip"
+mkdir -p "$root/cache/pycache"
+mkdir -p "$root/logs"
+mkdir -p "$root/mozconfigs"
+mkdir -p "$objdir"
+
+cat >"$mozconfig" <<EOF
+mk_add_options MOZ_OBJDIR=$objdir
+ac_add_options --enable-application=browser
+ac_add_options --disable-crashreporter
+ac_add_options --disable-debug
+ac_add_options --enable-optimize
+EOF
+
+cd "$gecko_dir"
+
+mach_env() {
+  MOZCONFIG="$mozconfig" \
+  MOZBUILD_STATE_PATH="$root/cache/mozbuild" \
+  GRADLE_USER_HOME="$root/cache/gradle" \
+  PIP_CACHE_DIR="$root/cache/pip" \
+  PYTHONPYCACHEPREFIX="$root/cache/pycache" \
+    "$@"
+}
+
+ensure_zstandard() {
+  for python_bin in "$root"/cache/mozbuild/srcdirs/*/_virtualenvs/build/bin/python "$root"/cache/mozbuild/srcdirs/*/_virtualenvs/common/bin/python; do
+    [ -x "$python_bin" ] || continue
+    if "$python_bin" -c 'import zstandard' >/dev/null 2>&1; then
+      continue
+    fi
+    PIP_CACHE_DIR="$root/cache/pip" "$python_bin" -m pip install 'zstandard<=0.23.0,>=0.11.1'
+  done
+}
+
+case "$mode" in
+  help)
+    mach_env ./mach build --help >"$log" 2>&1
+    ;;
+  configure)
+    mach_env ./mach build --help >/dev/null 2>&1
+    ensure_zstandard
+    mach_env ./mach configure >"$log" 2>&1
+    ;;
+  *)
+    printf 'unsupported AMPB_DESKTOP_BUILD_PROBE_MODE: %s\n' "$mode" >&2
+    exit 2
+    ;;
+esac
+
+printf 'AMPB_DESKTOP_BUILD_PROBE status=ok mode=%s mozconfig=%s objdir=%s log=%s\n' "$mode" "$mozconfig" "$objdir" "$log"

tools/browser-source-plan.sh

@@ -16,4 +16,5 @@ printf 'AMPB_TOR_BROWSER_BUILD_REPO=%s\n' "$tor_build_repo"
 printf 'AMPB_TOR_BROWSER_BUILD_DIR=%s\n' "$root/src/tor-browser-build"
 printf 'AMPB_GRADLE_USER_HOME=%s\n' "$root/cache/gradle"
 printf 'AMPB_MOZBUILD_STATE_PATH=%s\n' "$root/cache/mozbuild"
-printf 'AMPB_BUILD_LOG=%s\n' "$root/logs/gecko-android-mach-probe.log"
+printf 'AMPB_DESKTOP_BUILD_LOG=%s\n' "$root/logs/gecko-desktop-mach-help.log"
+printf 'AMPB_ANDROID_BUILD_LOG=%s\n' "$root/logs/gecko-android-mach-probe.log"