init action

Author: Stan van Rooy

.gitignore

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+node_modules
+

LICENSE

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+const core = require('@actions/core');
+const github = require('@actions/github');
+
+let octokit = undefined;
+
+const getHeadReleaseTag = async () => {
+  const response = await octokit.request("GET /repos/{owner}/{repo}/releases/latest", {
+    owner: github.context.owner,
+    repo: github.context.repo
+  });
+  return response.tag_name;
+}
+
+const getDefaultBaseReleaseTag = async () => {
+
+}
+
+(async function() {
+  try {
+    const token = core.getInput('token');
+    octokit = github.getOctokit(token);
+    const headReleaseTag = getHeadReleaseTag()
+    const baseReleaseTag = core.getInput('release-tag') || await getDefaultBaseReleaseTag();
+    
+    const response = await octokit.request("GET /GET /repos/{owner}/{repo}/compare/{base}...{head}", {
+      head: headReleaseTag,
+      base: baseReleaseTag
+    });
+    const messages = response.commits.map(c => c.commit.message);
+    core.setOutput('messages', messages.join(' '));
+  } catch (error) {
+     core.setFailed(error.message);
+  }
+})()
+