chore(ci): add buildkite pipelines (#4)

* chore: added buildkite config

* chore: add exec permission ci/buildkite-pipeline.sh

* chore(ci): update ci/buildkite-pipeline.sh

* chore(ci): update ci/buildkite-pipeline.sh

* chore(ci): update ci/buildkite-pipeline.sh

Author: nolanle

.buildkite/pipeline-upload.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+#
+# This script is used to upload the full buildkite pipeline. The steps defined
+# in the buildkite UI should simply be:
+#
+#   steps:
+#    - command: ".buildkite/pipeline-upload.sh"
+#
+
+set -e
+cd "$(dirname "$0")"/..
+source ci/_
+
+_ ci/buildkite-pipeline.sh pipeline.yml
+echo +++ pipeline
+cat pipeline.yml
+
+_ buildkite-agent pipeline upload pipeline.yml

ci/_

@@ -0,0 +1,17 @@
+# Buildkite log management helper
+#
+# See https://buildkite.com/docs/pipelines/managing-log-output
+#
+# |source| me
+#
+
+base_dir=$(realpath --strip "$(dirname "$0")/..")
+
+_() {
+  if [[ $(pwd) = $base_dir ]]; then
+    echo "--- $*"
+  else
+    echo "--- $* (wd: $(pwd))"
+  fi
+  "$@"
+}

ci/buildkite-pipeline.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+#
+# Builds a buildkite pipeline based on the environment variables
+#
+
+set -e
+cd "$(dirname "$0")"/..
+
+output_file=${1:-/dev/stderr}
+
+if [[ -n $CI_PULL_REQUEST ]]; then
+  IFS=':' read -ra affected_files <<< "$(buildkite-agent meta-data get affected_files)"
+  if [[ ${#affected_files[*]} -eq 0 ]]; then
+    echo "Unable to determine the files affected by this PR"
+    exit 1
+  fi
+else
+  affected_files=()
+fi
+
+start_pipeline() {
+  echo "# $*" > "$output_file"
+  echo "steps:" >> "$output_file"
+}
+
+wait_step() {
+  echo "  - wait" >> "$output_file"
+}
+
+start_pipeline "Push pipeline for ${BUILDKITE_BRANCH:-?unknown branch?}"
+wait_step
+exit 0