Add parse_file.js

- takes a path, regex, and regex flags and returns the captured group
    - probably needs some refinement
- add an example changelog entry

.github/workflows/build-tag.yml

@@ -35,3 +35,6 @@ jobs:
         git commit -m "Release $VERSION"
         git tag "$VERSION"
         git push --tags
+    - name: Release
+      run: |
+        node ./scripts/parse_file.js ./README.MD #{3}\s[0-9+\.]+[-\w+]+([\s\w0-9]+)#{3}\s[0-9+\.]+.* gm

README.MD

@@ -15,5 +15,7 @@ See the robots hard at work.
 
 ### 0.1.1-dev
 
+Example Changelog
+
 ### 0.1.0 (6 June 2023)
 * Initial Release [[1](https://github.com/pantheon-systems/plugin-pipeline-example/pull/1)]

scripts/parse_file.js

@@ -0,0 +1,20 @@
+"use strict";
+const { readFileSync } = require("fs");
+const { resolve } = require("path");
+
+// get the args
+const [path, regex, flags] = process.argv.slice(2);
+// throw if necessary args are missing
+if (!path) {
+  throw new Error("Please provide a path to the file to parse");
+}
+if (!regex) {
+  throw new Error("Please provide a regex to parse the file");
+}
+
+const filePath = resolve(__dirname,'..', path);
+const fileContent = fs.readFileSync(filePath, "utf8");
+const rx = new RegExp(regex, flags);
+const matches = fileContent.matchAll(rx);
+
+console.log([...matches][0][1].trim());