[scripts] Create internal-dependency-trace script package (#9783)

Adds a new package under `scripts/internal-dependency-trace` that can be used to generate a rendering of any internal file dependency graph.

Default configured to generate the directed dependency graph of `packages/cli/src/index.ts`

scripts/internal-dependency-trace/src/generate-mermaid-output.js

@@ -0,0 +1,35 @@
+const { readFileSync } = require('fs');
+const { createHash } = require('crypto');
+const { stripRootDirectory } = require('./root-directory');
+
+const hash = p => {
+  const h = createHash('sha1');
+  h.update(p);
+  return h.digest('hex');
+};
+
+const line = (p1, p2) =>
+  ` ${hash(p1)}(${stripRootDirectory(p1)}) --> ${hash(p2)}(${stripRootDirectory(
+    p2
+  )})\n`;
+
+function generateMermaidOutput(filePath, traceDataPath) {
+  const traceData = JSON.parse(readFileSync(traceDataPath, 'utf-8'));
+  const visited = new Set();
+  let output = 'graph LR\n';
+  function _generateMermaidOutput(_filePath) {
+    if (!traceData[_filePath]) return;
+    if (visited.has(hash(_filePath))) return;
+    else visited.add(hash(_filePath));
+    for (const dependency of traceData[_filePath].dependsOn) {
+      output += line(_filePath, dependency);
+      _generateMermaidOutput(dependency);
+    }
+  }
+  _generateMermaidOutput(filePath);
+  return output;
+}
+
+module.exports = {
+  generateMermaidOutput,
+};