build/merge.bash: script to help sync nightly with upstream

Change-Id: Iae9ee80b9fbbb64cc86b432487613334cf1fb72b
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/225097
Reviewed-by: Rebecca Stambler <[email protected]>

Author: hyangah

build/merge.bash

@@ -0,0 +1,34 @@
+#! /bin/bash
+set -euo pipefail
+
+# In order to sync with upstream, run merge.bash
+
+# TODO(hyangah): commands for building docker container and running tests locally with docker run.
+root_dir() {
+  local script_name=$(readlink -f "${0}")
+  local script_dir=$(dirname "${script_name}")
+  local parent_dir=$(dirname "${script_dir}")
+  echo "${parent_dir}"
+}
+
+ROOT="$(root_dir)"
+cd "${ROOT}"  # always run from the root directory.
+
+WORKTREE="$(mktemp -d)"
+BRANCH="sync/merge-upstream-$(date +%Y%m%d%H%M%S)"
+
+git fetch
+git worktree add --track -b "${BRANCH}" "${WORKTREE}" origin/master
+
+cd "${WORKTREE}"
+export GIT_GOFMT_HOOK=off
+git merge --no-commit "origin/upstream" || echo "Ignoring conflict..."
+
+COMMIT=`git log --format=%h -n 1 "origin/upstream"`
+
+gcloud builds submit --config=build/cloud.yaml || echo "Build failed.  Please address the issue..."
+
+git commit -m "sync: merge microsoft/vscode-go@${COMMIT} into master"
+
+git codereview mail -r [email protected],[email protected] HEAD
+cd - && git worktree remove "${WORKTREE}"