chore: removing the sucrase tranforms and tidy up the transforming

Signed-off-by: blam <ben@blam.sh>

Signed-off-by: blam <ben@blam.sh>

packages/cli/config/jest.js

@@ -134,10 +134,9 @@ async function getProjectConfig(targetPath, displayName) {
       '\\.(js|jsx|ts|tsx|mjs|cjs)$': [
         '@swc/jest',
         {
-          sourceMaps: false, // envOptions.enableSourceMaps || envOptions.nextTests,
+          sourceMaps: envOptions.enableSourceMaps || envOptions.nextTests,
         },
       ],
-      // '^.+\\.(t|j)sx?$': '@swc/jest',
       '\\.(bmp|gif|jpg|jpeg|png|frag|xml|svg|eot|woff|woff2|ttf)$':
         require.resolve('./jestFileTransform.js'),
       '\\.(yaml)$': require.resolve('jest-transform-yaml'),

packages/cli/config/jestSucraseTransform.js

@@ -1,91 +0,0 @@
-/*
- * Copyright 2021 The Backstage Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-const { createHash } = require('crypto');
-const { transform } = require('sucrase');
-const sucrasePkg = require('sucrase/package.json');
-const sucrasePluginPkg = require('@sucrase/jest-plugin/package.json');
-
-const ESM_REGEX = /\b(?:import|export)\b/;
-
-function createTransformer(config) {
-  const process = (source, filePath) => {
-    let transforms;
-
-    if (filePath.endsWith('.esm.js')) {
-      transforms = ['imports'];
-    } else if (filePath.endsWith('.js')) {
-      // This is a very rough filter to avoid transforming things that we quickly
-      // can be sure are definitely not ESM modules.
-      if (ESM_REGEX.test(source)) {
-        transforms = ['imports', 'jsx']; // JSX within .js is currently allowed
-      }
-    } else if (filePath.endsWith('.jsx')) {
-      transforms = ['jsx', 'imports'];
-    } else if (filePath.endsWith('.ts')) {
-      transforms = ['typescript', 'imports'];
-    } else if (filePath.endsWith('.tsx')) {
-      transforms = ['typescript', 'jsx', 'imports'];
-    }
-
-    // Only apply the jest transform to the test files themselves
-    if (transforms && filePath.includes('.test.')) {
-      transforms.push('jest');
-    }
-
-    if (transforms) {
-      const { code, sourceMap: map } = transform(source, {
-        transforms,
-        filePath,
-        disableESTransforms: true,
-        sourceMapOptions: {
-          compiledFilename: filePath,
-        },
-      });
-      if (config.enableSourceMaps) {
-        const b64 = Buffer.from(JSON.stringify(map), 'utf8').toString('base64');
-        const suffix = `//# sourceMappingURL=data:application/json;charset=utf-8;base64,${b64}`;
-        // Include both inline and object source maps, as inline source maps are
-        // needed for support of some editor integrations.
-        return { code: `${code}\n${suffix}`, map };
-      }
-      // We only return the `map` result if source maps are enabled, as they
-      // have a negative impact on the coverage accuracy.
-      return code;
-    }
-
-    return source;
-  };
-
-  // TODO: contribute something like this to @sucrase/jest-plugin
-  const getCacheKey = sourceText => {
-    return createHash('md5')
-      .update(sourceText)
-      .update(Buffer.alloc(1))
-      .update(sucrasePkg.version)
-      .update(Buffer.alloc(1))
-      .update(sucrasePluginPkg.version)
-      .update(Buffer.alloc(1))
-      .update(JSON.stringify(config))
-      .update(Buffer.alloc(1))
-      .update('1') // increment whenever the transform logic in this file changes
-      .digest('hex');
-  };
-
-  return { process, getCacheKey };
-}
-
-module.exports = { createTransformer };