devtools: add a script for running pure docker CI

For simplicity, add a new script that runs all.bash CI using Docker
only. This will facilitate hooking into Kokoro (a Google internal CI
runner).

Change-Id: I2faa6190e6ecc35a2b2dc9151f173dc07f80d9b5
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/241603
Reviewed-by: Julie Qiu <julie@golang.org>

all.bash

@@ -138,7 +138,6 @@ standard_linters() {
   check_misspell
   check_unparam
   check_script_hashes
-  run_prettier
 }
 
 usage() {
@@ -168,6 +167,7 @@ main() {
       ;;
     "")
       standard_linters
+      run_prettier
       runcmd go mod tidy
       runcmd env GO_DISCOVERY_TESTDB=true go test ./...
       # To test internal/secrets, set GO_DISCOVERY_SECRETS_BUCKET and GO_DISCOVERY_KMS_KEY_NAME

devtools/docker_ci.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+# Copyright 2020 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+set -e
+
+usage() {
+  cat <<EOUSAGE
+Usage: $0 [--sudo]
+
+Run standard CI (tests and linters) using local docker. If --sudo is set, run
+docker with sudo.
+EOUSAGE
+}
+
+maybe_sudo=
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    "-h" | "--help" | "help")
+      usage
+      exit 0
+      ;;
+    "--sudo")
+      maybe_sudo="sudo "
+      shift
+      ;;
+    *)
+      usage
+      exit 1
+  esac
+done
+
+# Find the repo root.
+script_dir=$(dirname "$(readlink -f "$0")")
+pkgsite_dir=$(readlink -f "${script_dir}/..")
+
+# Run postgres.
+pg_container=$(${maybe_sudo}docker run --rm -d --name pg_pkgsite_ci -e LANG=C postgres:11.4)
+trap "${maybe_sudo} docker stop ${pg_container}" EXIT
+
+# Run all.bash. To avoid any port conflict, run in the postgres network.
+cd "${pkgsite_dir}"
+${maybe_sudo}docker run --rm -t \
+  --network container:${pg_container} \
+  -v $(pwd):"/workspace" -w "/workspace" \
+  -e GO_DISCOVERY_TESTDB=true golang:1.14 ./all.bash ci