diff script

scripts/diff.js

@@ -0,0 +1,38 @@
+const { execSync } = require('child_process');
+const { parse } = require('path');
+const output = execSync(`git diff origin/master`).toString().split('\n')
+
+let count = 0;
+let start = 0;
+let current = 0;
+let sources = [];
+for (let i = 0; i < output.length; i++) {
+  if (output[i].startsWith('diff --git')) {
+    // skip 'diff --git a/' prefix
+    const file = output[i].split(' ')[2].substring(2);
+    sources.push({'file': file, 'lines': []});
+    // go to header line, e.g. '@@ -1,2 +1,3 @@'
+    do {
+      ++i;
+    }
+    while (!output[i].startsWith('@@'));
+    output[i].split(' ').forEach((c) => {
+        if (c.startsWith('+')) {
+            [start, count] = c.split(',');
+            start = parseInt(start);
+            count = parseInt(count);
+            current = 0;
+        }
+    });
+  }
+  else if (current < count && !output[i].startsWith('-')) {
+    if (output[i].startsWith('+')) {
+      sources[sources.length - 1].lines.push(start + current);
+    }
+    ++current;
+  }
+}
+
+module.exports = ({github, context}) => {
+  return context.payload.client_payload.value
+}