feat(core): Fixing false positives on wildcard exports (#55)

* feat(core): Supporting export wildcard

* Refactor code

integration/testproject/src/barrel/F.ts

@@ -0,0 +1,2 @@
+export const one = 1;
+export const two = 2;

integration/testproject/src/barrel/index.ts

@@ -1 +1,2 @@
 export { KualaOrLumpur } from './E';
+export * from "./F";

integration/testproject/src/importE.ts

@@ -1 +1 @@
-import { KualaOrLumpur } from './barrel';
+import * as barrel from './barrel';

src/analyzer.ts

@@ -57,21 +57,35 @@ function getExported(file: SourceFile) {
   return exported;
 }
 
-const emitDefinitelyUsed = (file: SourceFile, onResult: OnResultType) => {
+const importWildCards = (file: SourceFile) =>
   file
     .getImportDeclarations()
     .map(decl => ({
       moduleSourceFile: getModuleSourceFile(decl),
       definitelyUsed: isDefinitelyUsedImport(decl)
     }))
     .filter(meta => meta.definitelyUsed && !!meta.moduleSourceFile)
-    .forEach(({ moduleSourceFile }) => {
-      onResult({
-        file: moduleSourceFile,
-        symbols: [],
-        type: AnalysisResultTypeEnum.DEFINITELY_USED
-      });
-    });
+    .map(({ moduleSourceFile }) => ({
+      file: moduleSourceFile,
+      symbols: [],
+      type: AnalysisResultTypeEnum.DEFINITELY_USED
+    }));
+
+const exportWildCards = (file: SourceFile) =>
+  file
+    .getExportDeclarations()
+    .filter(decl => decl.getText().includes("*"))
+    .map((decl) => ({
+      file: getModuleSourceFile(decl),
+      symbols: [],
+      type: AnalysisResultTypeEnum.DEFINITELY_USED
+    }));
+
+const emitDefinitelyUsed = (file: SourceFile, onResult: OnResultType) => {
+  [
+    ...importWildCards(file),
+    ...exportWildCards(file)
+  ].forEach(onResult);
 };
 
 const emitPotentiallyUnused = (file: SourceFile, onResult: OnResultType) => {

src/util/getModuleSourceFile.ts

@@ -1,7 +1,7 @@
-import { ImportDeclaration } from "ts-morph";
+import { ImportDeclaration, ExportDeclaration } from "ts-morph";
 import { Maybe } from "true-myth";
 
-export const getModuleSourceFile = (decl: ImportDeclaration) =>
+export const getModuleSourceFile = (decl: ImportDeclaration | ExportDeclaration) =>
   Maybe.fromNullable(decl.getModuleSpecifierSourceFile()).mapOr(
     null as string | null,
     file => file.getFilePath()

src/util/isDefinitelyUsedImport.ts

@@ -7,6 +7,7 @@ const containsWildcardImport = (decl: ImportDeclaration) =>
     .mapOr("" as string, clause => clause.getText())
     .includes("*");
 
+
 const containsUnnamedImport = (decl: ImportDeclaration) =>
   !decl.getImportClause();