initial commit

Author: simonhaenisch

.editorconfig

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+root = true
+
+[*]
+indent_style = tab
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+indent_style = space
+trim_trailing_whitespace = false

.gitignore

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+node_modules
+package-lock.json
+dist

index.ts

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+import { CompilerOptions, findConfigFile, nodeModuleNameResolver, sys } from 'typescript';
+
+export const resolveTypescriptPaths = (options: Options = {}) => {
+	const compilerOptions = getCompilerOptions(options.tsConfigPath);
+
+	return {
+		name: 'resolve-typescript-paths',
+		resolveId: (importee: string, importer: string) => {
+			if (!compilerOptions.paths || !compilerOptions.paths[importee]) {
+				return null;
+			}
+
+			const { resolvedModule } = nodeModuleNameResolver(importee, importer, compilerOptions, sys);
+
+			if (!resolvedModule) {
+				return null;
+			}
+
+			const { resolvedFileName } = resolvedModule;
+
+			if (!resolvedFileName || resolvedFileName.endsWith('.d.ts')) {
+				return null;
+			}
+
+			return resolvedFileName;
+		},
+	};
+};
+
+const getCompilerOptions = (configPath = findConfigFile('./', sys.fileExists)): CompilerOptions => {
+	if (!configPath) {
+		return {};
+	}
+
+	const configJson = sys.readFile(configPath);
+
+	if (!configJson) {
+		return {};
+	}
+
+	const config: { compilerOptions?: CompilerOptions } = JSON.parse(configJson);
+
+	if (!config || !config.compilerOptions) {
+		return {};
+	}
+
+	return config.compilerOptions;
+};
+
+export interface Options {
+	tsConfigPath?: string;
+}

package.json

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+{
+  "name": "rollup-plugin-typescript-paths",
+  "version": "1.0.0",
+  "description": "Rollup Plugin to automatically resolve path aliases set in the compilerOptions section of tsconfig.json.",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "build": "tsc",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Simon Haenisch (https://github.com/simonhaenisch)",
+  "repository": "simonhaenisch/rollup-plugin-typescript-paths",
+  "keywords": [
+    "rollup-plugin",
+    "typescript"
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/simonhaenisch/rollup-plugin-typescript-paths/issues"
+  },
+  "homepage": "https://github.com/simonhaenisch/rollup-plugin-typescript-paths#readme",
+  "devDependencies": {
+    "typescript": "^3.4.5"
+  },
+  "peerDependencies": {
+    "typescript": ">=3.x"
+  },
+  "prettier": {
+    "printWidth": 120,
+    "singleQuote": true,
+    "tabWidth": 2,
+    "trailingComma": "all",
+    "useTabs": true,
+    "bracketSpacing": true
+  }
+}

readme.md

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+# rollup-plugin-typescript-paths
+
+Rollup Plugin to automatically resolve path aliases set in the `compilerOptions` section of `tsconfig.json`.
+
+For example, if you have 
+
+```js
+// tsconfig.json
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": {
+      "@utils": ["src/helpers/utils"]
+    }
+  }
+}
+```
+
+```js
+import { something } from '@utils';
+```
+
+Then this plugin will make sure that rollup knows how to resolve `@utils`.
+
+## Installation
+
+```
+npm install --save-dev rollup-plugin-typescript-paths
+```
+
+## Usage
+
+```js
+import { resolveTypescriptPaths } from 'rollup-plugin-typescript-paths';
+
+export default {
+  // ...
+  plugins: [
+    resolveTypescriptPaths()
+  ]
+}
+```
+
+## Options
+
+* **`tsConfigPath`:** If the plugin has trouble finding your `tsconfig.json`, you can pass the path to it via this option.
+
+## License
+
+[MIT](/license).
+

tsconfig.json

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+{
+	"compilerOptions": {
+		"target": "es5",
+		"module": "commonjs",
+		"lib": ["esnext"],
+		"declaration": true,
+		"outDir": "dist",
+
+		"strict": true,
+		"noUnusedLocals": true,
+		"noUnusedParameters": true,
+		"noImplicitReturns": true,
+		"noFallthroughCasesInSwitch": true,
+		"esModuleInterop": true
+	}
+}