init git repository

Author: orlov-vo

.gitignore

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+node_modules/
+npm-debug.log*

LICENSE

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+MIT License
+
+Copyright (c) 2019 Vladislav Orlov <[email protected]>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# parcel-transformer-svelte
+
+A Parcel 2 transformer for Svelte 3.
+
+## Installation
+
+```bash
+npm install parcel-transformer-svelte -D
+```
+
+After this you should configure in `.parcelrc` the transformation for Svelte files:
+
+```json
+{
+  "extends": ["@parcel/config-default"],
+  "transforms": {
+    "*.svelte": ["parcel-transformer-svelte"]
+  }
+}
+```
+
+## Configuration
+
+You can change Svelte options though a `.svelterc`, `svelte.config.js` file or `svelte` field
+in `package.json`.
+
+For documentation on which options you can use look at the official
+[svelte docs](https://github.com/sveltejs/svelte).
+
+```js
+// Options used by svelte.compile
+compiler: {
+  ...
+},
+// Preprocessors for svelte.preprocess
+preprocessors: {
+  ...
+}
+```
+
+## License
+
+MIT License

index.js

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+const path = require('path');
+const { Transformer } = require('@parcel/plugin');
+const { default: SourceMap } = require('@parcel/source-map');
+const { relativeUrl } = require('@parcel/utils');
+const { compile, preprocess } = require('svelte/compiler.js');
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+function generateName(input) {
+  let name = path
+    .basename(input)
+    .replace(path.extname(input), '')
+    .replace(/[^a-zA-Z_$0-9]+/g, '_')
+    .replace(/^_/, '')
+    .replace(/_$/, '')
+    .replace(/^(\d)/, '_$1');
+
+  name = name[0].toUpperCase() + name.slice(1);
+}
+
+exports.default = new Transformer({
+  async getConfig({ asset, options }) {
+    const sourceFileName = relativeUrl(options.projectRoot, asset.filePath);
+
+    const customOptions =
+      (await asset.getConfig(['.svelterc', 'svelte.config.js'], {
+        packageKey: 'svelte'
+      })) || {};
+
+    const compiler = {
+      css: false,
+      ...customOptions.compiler,
+      filename: sourceFileName,
+      name: generateName(sourceFileName),
+      dev: options.mode !== 'production'
+    };
+    const preprocessors = customOptions.preprocessors;
+
+    return { compiler, preprocessors };
+  },
+
+  async transform({ asset, config }) {
+    let code = await asset.getCode();
+
+    if (config.preprocessors) {
+      const preprocessed = await preprocess(
+        code,
+        config.preprocessors,
+        config.compiler
+      );
+      code = preprocessed.toString();
+    }
+
+    const { js, css } = compile(code, config.compiler);
+
+    // FIXME: source map should be set in different way ?
+    if (false && options.sourceMaps) {
+      asset.setMap(SourceMap.fromRawSourceMap(js.map));
+    }
+
+    return [
+      {
+        type: 'js',
+        code: js.code
+      },
+      css && {
+        type: 'css',
+        code: css.code
+      }
+    ].filter(Boolean);
+  }
+});

package-lock.json

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+{
+  "name": "parcel-transformer-svelte",
+  "version": "1.0.0",
+  "description": "Parcel 2 transformer for Svelte 3",
+  "main": "index.js",
+  "author": "Vladislav Orlov <[email protected]>",
+  "repository": "github:orlov-vo/parcel-transformer-svelte",
+  "license": "MIT",
+  "keywords": [
+    "parcel",
+    "transformer",
+    "svelte"
+  ],
+  "engines": {
+    "node": ">=8",
+    "parcel": "^2.0.0-alpha.2"
+  },
+  "peerDependencies": {
+    "@parcel/plugin": "^2.0.0-alpha.2",
+    "svelte": "^3.0.0"
+  }
+}