ci: add pipeline file

.ci/pipeline.ts

@@ -0,0 +1,46 @@
+import {
+  Job,
+  pushStep,
+  spawnChildJob,
+} from "https://pkg.buildyboi.ci/buildy/[email protected]/mod.ts";
+import * as Docker from "https://pkg.buildyboi.ci/buildy/[email protected]/mod.ts";
+
+export async function runTests(job: Job) {
+  const version: string = job.args.version;
+
+  const dockerFileTemplate = `
+  FROM python:${version}-buster
+
+  ADD requirements.txt .
+
+  RUN pip install -r requirements.txt flake8
+  `;
+
+  const image = await Docker.buildImage({
+    dockerfileContents: dockerFileTemplate,
+    include: ["requirements.txt"],
+  });
+
+  pushStep("Tests");
+  await Docker.run(`python setup.py test`, {
+    image: image.id,
+  });
+
+  pushStep("Flake8");
+  await Docker.run(`flake8 disco/`, {
+    image: image.id,
+  });
+}
+
+const versionMatrix = ["3.8", "3.7", "3.6"];
+
+export async function run(job: Job) {
+  for (const version of versionMatrix) {
+    await spawnChildJob(`.ci/pipeline.ts:runTests`, {
+      args: {
+        version: version,
+      },
+      alias: `Test Python ${version}`,
+    });
+  }
+}