add script to parse gitdiff

Author: Hweinstock

.github/workflows/parseDiff.js

@@ -0,0 +1,48 @@
+const fs = require('fs/promises')
+
+function parseFilePath(filePathLine) {
+    return filePathLine.split(' ')[2].split('/').slice(1).join('/')
+}
+
+function parseRange(rangeLine) {
+    const [_fromRange, toRange] = rangeLine.split(' ').slice(1, 3)
+    const [startLine, numLines] = toRange.slice(1).split(',').map(Number)
+    const range = [startLine, startLine + numLines]
+    return range
+}
+
+async function parseChanges(diffPath) {
+    const diff = await fs.readFileSync(diffPath, 'utf8')
+    const lines = diff.split('\n')
+    let currentFile = null
+    let currentRange = null
+    let changes = []
+
+    for (const line of lines) {
+        if (line.startsWith('diff')) {
+            currentFile = parseFilePath(line)
+            currentRange = null
+        }
+        if (line.startsWith('@@')) {
+            currentRange = parseRange(line)
+            changes.push({ file: currentFile, range: currentRange })
+        }
+    }
+
+    return changes
+}
+
+function formatChanges(changes) {
+    return changes.map((change) => `${change.file}#L${change.range[0]}-L${change.range[1]}`).join('\n')
+}
+
+async function main() {
+    const rawDiffPath = process.argv[2]
+    console.log('Recieved diff path: %s', rawDiffPath)
+    const changes = await parseChanges(rawDiffPath)
+    const output = formatChanges(changes)
+
+    await fs.writeFile('diff-parsed.txt', output)
+}
+
+void main()

.github/workflows/parseJscpd.js

@@ -0,0 +1,3 @@
+async function main() {}
+
+void main()