Nightly tests (#444)

* add a simple staging test

* add buildkite stuff

* buildkite setup like in the [example](https://github.com/buildkite/golang-example)

* yamllint

* add running geth for 1m as a buildkite command

* fixups post go mod

* workaround a stupid go issue

* add 1 hour test

* fix bash maths

* run the job for 5 hours

.buildkite/hooks/pre-command

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+set +u
+
+echo "--- :golang: Setting up Golang build environment"
+
+if [[ ! -z "${BUILDKITE_GOLANG_IMPORT_PATH:-}" ]] && [[ "$BUILDKITE_GOLANG_IMPORT_PATH" != "" ]]; then
+  NEW_GOPATH="$(pwd)/tmp/go"
+  NEW_BUILD_CHECKOUT_PATH="$NEW_GOPATH/src/$BUILDKITE_GOLANG_IMPORT_PATH"
+
+  # Create the regular GOPATH folders
+  mkdir -p "$NEW_GOPATH/bin"
+  mkdir -p "$NEW_GOPATH/src"
+
+  # Create the /src/x.com/project/name path, and create a symlink of the
+  # current build to that new directory
+  mkdir -p "$NEW_BUILD_CHECKOUT_PATH"
+  rm -rf "$NEW_BUILD_CHECKOUT_PATH"
+  ln -s "$(pwd)" "$NEW_BUILD_CHECKOUT_PATH"
+
+  export GOPATH=$NEW_GOPATH
+  echo "New \$GOPATH is set to $NEW_GOPATH"
+  echo "Build will now be at $NEW_BUILD_CHECKOUT_PATH"
+
+  export BUILDKITE_BUILD_CHECKOUT_PATH=$NEW_BUILD_CHECKOUT_PATH
+else
+  echo "No \$BUILDKITE_GOLANG_IMPORT_PATH set, skipping..."
+fi

.buildkite/pipeline.yml

@@ -0,0 +1,6 @@
+---
+steps:
+  - command: './nightly.sh'
+    label: 'build & run geth'
+    env:
+      BUILDKITE_GOLANG_IMPORT_PATH: "github.com/ledgerwatch/turbo-geth"

nightly.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+# running the job for 5 hours
+let SLEEP_TIME=5*60*60
+
+# GOFLAGS=-modcacherw is required for our CI
+# to be able to remove go modules cache
+GOFLAGS=-modcacherw make geth
+
+echo "running geth..."
+./build/bin/geth > tgeth.log 2>&1 &
+
+GETH_PID=$!
+
+echo "sleeping for $SLEEP_TIME seconds"
+
+sleep $SLEEP_TIME
+
+echo "killing GETH (pid=$GETH_PID)"
+kill $GETH_PID
+echo "boom"
+
+wait $GETH_PID
+
+GETH_STATUS=$?
+echo "The exit status of the process was $GETH_STATUS"
+
+exit $GETH_STATUS