Switch to accessibility insights's version of these tools (#603)

* Switch to accessibility insights's version of these tools

* auto-add files meeting strict checks

strict-null-checks/find.js

@@ -0,0 +1,63 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+// @ts-check
+const path = require("path");
+const process = require("process");
+const { srcRoot } = require("./config");
+const { getUncheckedLeafFiles, getAllEligibleFiles } = require("./eligible-file-finder");
+const { getImportsForFile } = require("./import-finder");
+
+if (process.argv.includes("--help")) {
+  console.log("yarn null:find [--sort=name|count] [--show-count] [--filter file_path_substring]");
+  process.exit(0);
+}
+const sortBy = process.argv.includes("--sort=name") ? "name" : "count";
+const printDependedOnCount = process.argv.includes("--show-count");
+const filterArgIndex = process.argv.indexOf("--filter") + 1;
+const filterArg = filterArgIndex === 0 ? null : process.argv[filterArgIndex];
+const filter = filterArg && ((file) => file.includes(filterArg));
+
+async function main() {
+  const eligibleFiles = await getUncheckedLeafFiles();
+
+  const eligibleSet = new Set(eligibleFiles);
+
+  const dependedOnCount = new Map(eligibleFiles.map((file) => [file, 0]));
+
+  for (const file of await getAllEligibleFiles()) {
+    if (eligibleSet.has(file)) {
+      // Already added
+      continue;
+    }
+
+    for (const imp of getImportsForFile(file, srcRoot)) {
+      if (dependedOnCount.has(imp)) {
+        dependedOnCount.set(imp, dependedOnCount.get(imp) + 1);
+      }
+    }
+  }
+
+  let out = Array.from(dependedOnCount.entries());
+  if (filter) {
+    out = out.filter((x) => filter(x[0]));
+  }
+  if (sortBy === "count") {
+    out = out.sort((a, b) => b[1] - a[1]);
+  } else if (sortBy === "name") {
+    out = out.sort((a, b) => a[0].localeCompare(b[0]));
+  }
+  for (const pair of out) {
+    console.log(toFormattedFilePath(pair[0]) + (printDependedOnCount ? ` — Depended on by **${pair[1]}** files` : ""));
+  }
+}
+
+function toFormattedFilePath(file) {
+  const relativePath = path.relative(srcRoot, file).replace(/\\/g, "/");
+  return `"./src/${relativePath}",`;
+}
+
+main().catch((error) => {
+  console.error(error.stack);
+  process.exit(1);
+});