feat: follow symlinks in dependency graph

Author: keithamus

lib/dependency-graph.js

@@ -41,10 +41,15 @@ function gatherImported() {
 
   for (const {imports} of dependencyGraph.values()) {
     for (const [importedFilename, importedIdentifiers] of imports) {
-      filenames.add(importedFilename)
+      // require.resolve will expand any symlinks to their fully qualified
+      // directories. We can use this (with the absolute path given in
+      // importedFilename to quickly expand symlinks, which allows us to have
+      // symlinks (aka workspaces) in node_modules, and not fail the lint.
+      const fullyQualifiedImportedFilename = require.resolve(importedFilename)
+      filenames.add(fullyQualifiedImportedFilename)
 
       for (const importedIdentifier of importedIdentifiers) {
-        identifiers.add(`${importedFilename}#${importedIdentifier}`)
+        identifiers.add(`${fullyQualifiedImportedFilename}#${importedIdentifier}`)
       }
     }
   }