Travis -> Buildkite (#88)

* buildkite

* chmod

* ruby

* install ruby using apt

* bash iit

* use apt-get

* try sudo

* use docker

* sudo

* use jekyll docker

* copy over things

* make gemfile.lock writeable

* make _site writeable

* remove travis

* clean up

Author: ratulm

.buildkite/build.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -euo pipefail
+
+# hack to make things writeable by bundle
+touch Gemfile.lock
+chmod a+w Gemfile.lock
+mkdir _site
+chmod a+w _site
+
+bundle install
+bundle exec jekyll build

.buildkite/hooks/pre-command

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+set -eu
+
+export PATH="$HOME/.rbenv/bin:$PATH"
+
+eval "$(rbenv init -)"

.buildkite/pipeline.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+DOCKER_PLUGIN_VERSION="${DOCKER_PLUGIN_VERSION:-v3.3.0}"
+
+cat <<EOF
+steps:
+EOF
+
+###### WAIT a visible marker between pipeline generation and starting.
+cat <<EOF
+  - wait
+EOF
+
+cat <<EOF
+  - label: ":jekyll: jekyll"
+    command:
+      - ".buildkite/build.sh"
+    plugins:
+      - docker#${DOCKER_PLUGIN_VERSION}:
+          image: jekyll/jekyll
+          always-pull: true
+EOF