Set up auto publishing of the sourcegraph/lang-go Docker image from master (#351)

Author: chrismwendt

Dockerfile

@@ -0,0 +1,6 @@
+FROM golang:alpine
+
+COPY . /go/src/github.com/sourcegraph/go-langserver
+RUN go install github.com/sourcegraph/go-langserver
+RUN apk add --no-cache openssh git curl
+CMD ["go-langserver"]

buildkite.yml

@@ -0,0 +1,7 @@
+steps:
+  # Build & deploy Docker image
+  - command: ./deploy.sh
+    branches: master
+    label: ':rocket:'
+    concurrency: 1
+    concurrency_group: deploy

deploy.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+set -ex
+cd $(dirname "${BASH_SOURCE[0]}")
+
+# Build image
+VERSION=$(printf "%05d" $BUILDKITE_BUILD_NUMBER)_$(date +%Y-%m-%d)_$(git rev-parse --short HEAD)
+docker build -t sourcegraph/lang-go:$VERSION .
+
+# Upload to Docker Hub
+docker push sourcegraph/lang-go:$VERSION
+docker tag sourcegraph/lang-go:$VERSION sourcegraph/lang-go:latest
+docker push sourcegraph/lang-go:latest
+docker tag sourcegraph/lang-go:$VERSION sourcegraph/lang-go:insiders
+docker push sourcegraph/lang-go:insiders