ci: adding validate-pr-title

Author: RaphDal

.github/workflows/glibc_smoke_test.yml

@@ -0,0 +1,4 @@
+const { danger, fail } = require("danger");
+const { validate } = require("./validate");
+
+validate({ title: danger.github.pr.title, onError: fail });

ci/validate-pr-title/dangerfile.js

@@ -0,0 +1,5 @@
+This folder contains configuration files which are used to run validation rules on Github pull requests titles.
+
+It is done by running [Danger JS](https://danger.systems/js/) tool in [github action](../../.github/workflows/danger.yml).
+
+In addition, the validation rules are tested. Tests can be executed with node, by running `node ./validate.test.js`

ci/validate-pr-title/readme.md

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+const allowedTypes = [
+  "feat",
+  "fix",
+  "chore",
+  "docs",
+  "style",
+  "refactor",
+  "perf",
+  "test",
+  "ci",
+  "revert",
+];
+
+const allowedSubTypes = [
+  "build",
+  "sql",
+  "log",
+  "mig",
+  "core",
+  "ilp",
+  "pgwire",
+  "http",
+  "conf",
+  "ui",
+  "wal",
+  "parquet",
+    "utils"
+];
+
+const errorMessage = `
+Please update the PR title to match this format:
+\`type(subType): description\`
+
+Where \`type\` is one of:
+${allowedTypes.map((t) => `\`${t}\``).join(", ")}
+
+And: \`subType\` is one of:
+${allowedSubTypes.map((t) => `\`${t}\``).join(", ")}
+
+For Example:
+
+\`\`\`
+perf(sql): improve pattern matching performance for SELECT sub-queries
+\`\`\`
+`.trim();
+
+/* The basic valid PR title formats are:
+ * 1. allowedType(allowedSubtype): optional description
+ * 2. allowedType: optional description
+ *
+ * consult ./validate.test.js for a full list
+ * */
+const prTitleRegex = new RegExp(
+  `^(((?:${allowedTypes.join("|")})\\((?:${allowedSubTypes.join(
+    "|"
+  )})\\))|build): .*`
+);
+
+function validate({ title, onError }) {
+  // Early return for title that matches predefined regex.
+  // No action required in such case.
+  if (title.match(prTitleRegex)) {
+    return;
+  }
+
+  onError(errorMessage);
+}
+
+module.exports = {
+  allowedTypes,
+  allowedSubTypes,
+  validate,
+};

ci/validate-pr-title/validate.js

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+const assert = require("node:assert").strict;
+const { validate, allowedTypes, allowedSubTypes } = require("./validate");
+
+const testValid = (title) =>
+  assert.doesNotThrow(() =>
+    validate({
+      title,
+      onError: () => {
+        throw `should accept "${title}"`;
+      },
+    })
+  );
+
+const testInvalid = (title) =>
+  assert.throws(
+    () => validate({ title, onError }),
+    `should NOT accept "${title}"`
+  );
+
+allowedTypes.forEach((type) => {
+  allowedSubTypes.forEach((subType) => {
+    testValid(
+      `${type}(${subType}): foo`,
+      `should accept "${type}(${subType}): foo"`
+    );
+  });
+});
+
+testValid("build: 6.6");
+testValid("build: hello world");
+testInvalid("build");
+
+testValid(`build: house`);
+testInvalid(`build(house)`);
+
+testInvalid(`foo: bar`);
+testInvalid(`update(bar): baz`);
+testInvalid(`ui: updating stuff`);