Chore: change triggering of the detect-breaking-changes Github flow (#43188)

* chore: only run the breaking-changes flow on pull requests

* chore: run the detect-breaking-changes flow on opening a PR

* chore: use

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* trying to get workflow split running.

* trying to trigger workflow.

* trying to trigger.

* Splits levitate job into two workflows.

Co-authored-by: Marcus Andersson <marcus.andersson@grafana.com>

.github/workflows/scripts/get-workflow-run-artifact.js

@@ -0,0 +1,45 @@
+module.exports = async ({ github, context, core, runId, artifactName }) => {
+    try {
+        const AdmZip = require('adm-zip');
+        const fs = require('fs');
+
+        const { owner, repo } = context.repo;
+        const { data } = await github.rest.actions.listWorkflowRunArtifacts({
+            owner, 
+            repo, 
+            run_id: runId,
+        });
+    
+        const artifact = data.artifacts.find(a => a.name === artifactName);
+        
+        if (!artifact) {
+            throw new Error(`Could not find artifact ${artifactName} in workflow (${runId})`);
+        }
+    
+        const zip = await github.rest.actions.downloadArtifact({
+            owner,
+            repo,
+            artifact_id: artifact.id,
+            archive_format: "zip",
+        });
+    
+        const dir = `./tmp/${artifactName}`;
+        await mkdirRecursive(fs, dir);
+    
+        const admZip = new AdmZip(Buffer.from(zip.data));
+        admZip.extractAllTo(dir, true);
+
+        return dir;
+    } catch (error) {
+        core.restFailed(error.message);
+    }
+}
+
+async function mkdirRecursive(fs, path) {
+    return new Promise((resolve, reject) => {
+        fs.mkdir(path, { recursive: true }, (error) => {
+            if (error) return reject(error);
+            return resolve();
+        });
+    });
+}

.github/workflows/scripts/json-file-to-job-output.js

@@ -0,0 +1,27 @@
+module.exports = async ({ core, filePath }) => {
+    try {
+        const fs = require('fs');
+        const content = await readFile(fs, filePath);
+        const result = JSON.parse(content);
+    
+        core.startGroup('Parsing json file...');
+
+        for (const property in result) {
+            core.info(`${property} <- ${result[property]}`);
+            core.setOutput(property, result[property]);
+        }
+
+        core.endGroup();
+    } catch (error) {
+        core.restFailed(error.message);
+    }
+}
+
+async function readFile(fs, path) {
+    return new Promise((resolve, reject) => {
+        fs.readFile(path, (error, data) => {
+            if (error) return reject(error);
+            return resolve(data);
+        });
+    });
+}

.github/workflows/scripts/pr-get-job-link.js

@@ -0,0 +1,9 @@
+
+module.exports = async ({ github, context, core }) => {
+    const { owner, repo } = context.repo;
+    const url = `https://api.github.com/repos/${owner}/${repo}/actions/runs/${context.runId}/jobs`
+    const result = await github.request(url)
+    const link = `https://github.com/grafana/grafana/runs/${result.data.jobs[0].id}?check_suite_focus=true`;
+
+    core.setOutput('link', link);
+}