fix: usage with raw loaders (#69)

package.json

@@ -38,6 +38,7 @@
     "webpack": "^4.0.0"
   },
   "dependencies": {
+    "buffer-json": "^2.0.0",
     "find-cache-dir": "^2.1.0",
     "loader-utils": "^1.1.0",
     "mkdirp": "^0.5.1",
@@ -64,6 +65,7 @@
     "eslint-config-webpack": "^1.0.0",
     "eslint-plugin-import": "^2.0.0",
     "eslint-plugin-prettier": "^3.0.0",
+    "file-loader": "^3.0.1",
     "husky": "^1.2.1",
     "jest": "^24.5.0",
     "lint-staged": "^8.1.0",

src/index.js

@@ -9,6 +9,7 @@ const async = require('neo-async');
 const crypto = require('crypto');
 const mkdirp = require('mkdirp');
 const findCacheDir = require('find-cache-dir');
+const BJSON = require('buffer-json');
 
 const { getOptions } = require('loader-utils');
 const validateOptions = require('schema-utils');
@@ -211,7 +212,7 @@ const directories = new Set();
 
 function write(key, data, callback) {
   const dirname = path.dirname(key);
-  const content = JSON.stringify(data);
+  const content = BJSON.stringify(data);
 
   if (directories.has(dirname)) {
     // for performance skip creating directory
@@ -238,7 +239,7 @@ function read(key, callback) {
     }
 
     try {
-      const data = JSON.parse(content);
+      const data = BJSON.parse(content);
       callback(null, data);
     } catch (e) {
       callback(e);
@@ -253,4 +254,5 @@ function cacheKey(options, request) {
   return path.join(cacheDirectory, `${hash}.json`);
 }
 
+export const raw = true;
 export { loader as default, pitch };

test/__snapshots__/cacheContext-option.test.js.snap

@@ -7,68 +7,72 @@ exports[`cacheContext option should generate absolute paths to the project root:
 exports[`cacheContext option should generate relative paths to the project root: errors 1`] = `Array []`;
 
 exports[`cacheContext option should generate relative paths to the project root: generated cache-loader data 1`] = `
-Array [
-  Object {
-    "contextDependencies": Array [],
-    "dependencies": Array [
-      Object {
-        "mtime": null,
-        "path": "test/fixtures/basic/file_1.js",
+"[
+  {
+    \\"remainingRequest\\": \\"test/fixtures/basic/file_1.js\\",
+    \\"dependencies\\": [
+      {
+        \\"path\\": \\"test/fixtures/basic/file_1.js\\",
+        \\"mtime\\": null
       },
-      Object {
-        "mtime": null,
-        "path": "src/index.js",
-      },
-    ],
-    "remainingRequest": "test/fixtures/basic/file_1.js",
-    "result": Array [
-      "/* eslint-disable */
-console.log('file_1');
-",
+      {
+        \\"path\\": \\"src/index.js\\",
+        \\"mtime\\": null
+      }
     ],
+    \\"contextDependencies\\": [],
+    \\"result\\": [
+      {
+        \\"type\\": \\"Buffer\\",
+        \\"data\\": \\"base64:LyogZXNsaW50LWRpc2FibGUgKi8KY29uc29sZS5sb2coJ2ZpbGVfMScpOwo=\\"
+      }
+    ]
   },
-  Object {
-    "contextDependencies": Array [],
-    "dependencies": Array [
-      Object {
-        "mtime": null,
-        "path": "test/fixtures/basic/file_2.js",
-      },
-      Object {
-        "mtime": null,
-        "path": "src/index.js",
+  {
+    \\"remainingRequest\\": \\"test/fixtures/basic/file_2.js\\",
+    \\"dependencies\\": [
+      {
+        \\"path\\": \\"test/fixtures/basic/file_2.js\\",
+        \\"mtime\\": null
       },
+      {
+        \\"path\\": \\"src/index.js\\",
+        \\"mtime\\": null
+      }
     ],
-    "remainingRequest": "test/fixtures/basic/file_2.js",
-    "result": Array [
-      "/* eslint-disable */
-console.log('file_2');
-",
-    ],
+    \\"contextDependencies\\": [],
+    \\"result\\": [
+      {
+        \\"type\\": \\"Buffer\\",
+        \\"data\\": \\"base64:LyogZXNsaW50LWRpc2FibGUgKi8KY29uc29sZS5sb2coJ2ZpbGVfMicpOwo=\\"
+      }
+    ]
   },
-  Object {
-    "contextDependencies": Array [],
-    "dependencies": Array [
-      Object {
-        "mtime": null,
-        "path": "test/fixtures/basic/index.js",
-      },
-      Object {
-        "mtime": null,
-        "path": "src/index.js",
+  {
+    \\"remainingRequest\\": \\"test/fixtures/basic/index.js\\",
+    \\"dependencies\\": [
+      {
+        \\"path\\": \\"test/fixtures/basic/index.js\\",
+        \\"mtime\\": null
       },
+      {
+        \\"path\\": \\"src/index.js\\",
+        \\"mtime\\": null
+      }
     ],
-    "remainingRequest": "test/fixtures/basic/index.js",
-    "result": Array [
-      "/* eslint-disable */
-require('./file_1.js');
-require('./file_2.js');
-
-console.log('basic_entry');
-",
-    ],
-  },
-]
+    \\"contextDependencies\\": [],
+    \\"result\\": [
+      {
+        \\"type\\": \\"Buffer\\",
+        \\"data\\": \\"base64:LyogZXNsaW50LWRpc2FibGUgKi8KcmVxdWlyZSgnLi9maWxlXzEuanMnKTsKcmVxdWlyZSgnLi9maWxlXzIuanMnKTsKCmNvbnNvbGUubG9nKCdiYXNpY19lbnRyeScpOwo=\\"
+      }
+    ]
+  }
+]"
 `;
 
 exports[`cacheContext option should generate relative paths to the project root: warnings 1`] = `Array []`;
+
+exports[`cacheContext option should load as a raw loader to support images: errors 1`] = `Array []`;
+
+exports[`cacheContext option should load as a raw loader to support images: warnings 1`] = `Array []`;

test/cacheContext-option.test.js

@@ -1,6 +1,7 @@
 const path = require('path');
 
 const normalizePath = require('normalize-path');
+const BJSON = require('buffer-json');
 
 const { webpack } = require('./helpers');
 
@@ -27,6 +28,18 @@ const mockRelativeWebpackConfig = {
   },
 };
 
+const sortData = (a, b) => {
+  if (a.remainingRequest < b.remainingRequest) {
+    return -1;
+  }
+
+  if (a.remainingRequest > b.remainingRequest) {
+    return 1;
+  }
+
+  return 0;
+};
+
 const buildSnapshotReadyDeps = (deps) =>
   deps.map((dep) => Object.assign({}, dep, { mtime: null, path: dep.path }));
 
@@ -46,19 +59,7 @@ const buildCacheLoaderCallsData = (calls) =>
         });
       }, new Map())
       .values()
-  );
-
-const sortData = (a, b) => {
-  if (a.remainingRequest < b.remainingRequest) {
-    return -1;
-  }
-
-  if (a.remainingRequest > b.remainingRequest) {
-    return 1;
-  }
-
-  return 0;
-};
+  ).sort(sortData);
 
 describe('cacheContext option', () => {
   it('should generate relative paths to the project root', async () => {
@@ -67,14 +68,16 @@ describe('cacheContext option', () => {
 
     const cacheLoaderCallsData = buildCacheLoaderCallsData(
       mockCacheLoaderWriteFn.mock.calls
-    ).sort(sortData);
+    );
 
     expect(
       cacheLoaderCallsData.every(
         (call) => !call.remainingRequest.includes(path.resolve('.'))
       )
+    ).toBeTruthy();
+    expect(BJSON.stringify(cacheLoaderCallsData, 2)).toMatchSnapshot(
+      'generated cache-loader data'
     );
-    expect(cacheLoaderCallsData).toMatchSnapshot('generated cache-loader data');
     expect(stats.compilation.warnings).toMatchSnapshot('warnings');
     expect(stats.compilation.errors).toMatchSnapshot('errors');
   });
@@ -85,13 +88,13 @@ describe('cacheContext option', () => {
 
     const cacheLoaderCallsData = buildCacheLoaderCallsData(
       mockCacheLoaderWriteFn.mock.calls
-    ).sort(sortData);
+    );
 
     expect(
       cacheLoaderCallsData.every(
         (call) => call.remainingRequest === normalizePath(call.remainingRequest)
       )
-    );
+    ).toBeTruthy();
   });
 
   it('should generate absolute paths to the project root', async () => {
@@ -100,12 +103,27 @@ describe('cacheContext option', () => {
 
     const cacheLoaderCallsData = buildCacheLoaderCallsData(
       mockCacheLoaderWriteFn.mock.calls
-    ).sort(sortData);
+    );
 
     expect(
       cacheLoaderCallsData.every((call) =>
         call.remainingRequest.includes(path.resolve('.'))
       )
+    ).toBeFalsy();
+    expect(stats.compilation.warnings).toMatchSnapshot('warnings');
+    expect(stats.compilation.errors).toMatchSnapshot('errors');
+  });
+
+  it('should load as a raw loader to support images', async () => {
+    const testId = './img/index.js';
+    const stats = await webpack(testId, mockBaseWebpackConfig);
+
+    const cacheLoaderCallsData = buildCacheLoaderCallsData(
+      mockCacheLoaderWriteFn.mock.calls
+    );
+
+    expect(
+      cacheLoaderCallsData.every((call) => Buffer.isBuffer(call.result[0]))
     );
     expect(stats.compilation.warnings).toMatchSnapshot('warnings');
     expect(stats.compilation.errors).toMatchSnapshot('errors');

test/fixtures/img/index.js

@@ -0,0 +1,4 @@
+/* eslint-disable */
+import png from '../img/webpack_logo.png';
+
+console.log(png);

test/helpers.js

@@ -1,4 +1,5 @@
 const path = require('path');
+
 const del = require('del');
 const webpack = require('webpack');
 const MemoryFS = require('memory-fs');
@@ -26,6 +27,16 @@ const moduleConfig = (config) => {
                 : []
             ),
           },
+          {
+            test: /\.png$/,
+            use: [
+              {
+                loader: path.resolve(__dirname, '../src/index.js'),
+                options: (config.loader && config.loader.options) || {},
+              },
+              'file-loader',
+            ],
+          },
         ],
   };
 };