ci: add Gitlab CI

This is an inital commit that enables the use of Gitlab CI.

schutzbot/update_github_status.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+if [[ $1 == "start" ]]; then
+  GITHUB_NEW_STATE="pending"
+  GITHUB_NEW_DESC="I'm currently testing this commit, be patient."
+elif [[ $1 == "finish" ]]; then
+  GITHUB_NEW_STATE="success"
+  GITHUB_NEW_DESC="I like this commit!"
+elif [[ $1 == "update" ]]; then
+  if [[ $CI_JOB_STATUS == "canceled" ]]; then
+    GITHUB_NEW_STATE="failure"
+    GITHUB_NEW_DESC="Someone told me to cancel this test run."
+  elif [[ $CI_JOB_STATUS == "failed" ]]; then
+    GITHUB_NEW_STATE="failure"
+    GITHUB_NEW_DESC="I'm sorry, something is odd about this commit."
+  else
+    exit 0
+  fi
+else
+  echo "unknown command"
+  exit 1
+fi
+
+curl \
+    -u "${SCHUTZBOT_LOGIN}" \
+    -X POST \
+    -H "Accept: application/vnd.github.v3+json" \
+    "https://api.github.com/repos/osbuild/osbuild/statuses/${CI_COMMIT_SHA}" \
+    -d '{"state":"'"${GITHUB_NEW_STATE}"'", "description": "'"${GITHUB_NEW_DESC}"'", "context": "Schutzbot on GitLab", "target_url": "'"${CI_PIPELINE_URL}"'"}'