New: First release

.editorconfig

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+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.json]
+indent_size = 2

.eslintrc.js

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+const tslintConfigRulesDirectory = [
+    'node_modules/tslint/lib/rules',
+    // 'node_modules/tslint-clean-code/dist/src',
+    // 'node_modules/tslint-microsoft-contrib',
+];
+const tslintConfigRules = Object.assign({},
+    require('tslint/lib/configs/recommended').rules,
+    // require('tslint-clean-code/recommended_ruleset').rules,
+    // require('tslint-microsoft-contrib/recommended_ruleset').rules,
+    {
+        'member-access': false,
+        'ordered-imports': false,
+        'quotemark': false,
+        'no-var-keyword': false,
+        'object-literal-sort-keys': false,
+        'no-console': false,
+        'arrow-parens': false,
+        'max-line-length': false,
+        'object-literal-key-quotes': false,
+        'no-shadowed-variable': false,
+        'only-arrow-functions': false,
+        'no-var-requires': false,
+        'semicolon': false,
+        'interface-over-type-literal': false,
+        'align': false,
+        'trailing-comma': false,
+        'typedef': false,
+        'newline-before-return': false,
+        'interface-name': false,
+    }
+);
+
+module.exports = {
+    'root': true,
+    'env': {
+        'es6': true,
+        'node': true
+    },
+    'extends': [
+        'eslint:recommended',
+        'plugin:unicorn/recommended',
+    ],
+    'parser': 'typescript-eslint-parser',
+    'parserOptions': {
+        'ecmaVersion': 2017,
+        'sourceType': 'module'
+    },
+    'plugins': [
+        'unicorn',
+        'typescript',
+        'import',
+        'tslint',
+    ],
+    'rules': {
+        'no-undef': 0,
+        'no-unused-vars': 0,
+        'indent': 0,
+        'unicorn/import-index': 0,
+        'tslint/config': [1, {
+            // tsconfigFile: 'tsconfig.json',
+            rules: tslintConfigRules,
+            rulesDirectory: tslintConfigRulesDirectory,
+        }],
+        'import/newline-after-import': 0,
+        'import/no-duplicates': 1,
+        'import/max-dependencies': [1, { 'max': 10 }],
+        'quotes': [1, 'single', { 'allowTemplateLiterals': true }],
+        'semi': [1, 'always'],
+    }
+};

.gitignore

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+/node_modules
+/.idea
+/.awcache
+/.vscode
+/.nyc_output
+*.log
+~*
+/dist/

.npmignore

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+# .gitignore
+/node_modules
+/.idea
+/.awcache
+/.vscode
+/.nyc_output
+*.log
+~*
+# .npmignore
+/tsconfig.json
+/.eslintrc.js
+/.editorconfig

.npmrc

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+package-lock = false
+# save-exact = true

LICENSE

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+MIT License
+
+Copyright (c) 2018
+
+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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+typescript-service
+===
+
+
+CHANGELOG
+---
+See [CHANGELOG.md](CHANGELOG.md)

package.json

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+{
+  "name": "typescript-service",
+  "version": "0.0.0-dev",
+  "license": "MIT",
+  "description": "",
+  "main": "dist/index.js",
+  "typings": "src/index.ts",
+  "scripts": {
+    "t": "npm run mocha -- src/*.spec.ts",
+    "test": "npm run eslint && npm run tscheck && npm run t",
+    "test:r": "npm run mocha -- src/*.spec.ts",
+    "mocha": "node -r ts-node/register/transpile-only node_modules/mocha/bin/_mocha",
+    "test:w": "npm run mocha -- --watch-extensions ts --watch src/**/*.spec.ts",
+    "test:d": "node --inspect-brk -r ts-node/register/transpile-only node_modules/mocha/bin/_mocha --no-timeouts src/**/*.spec.ts",
+    "tscheck": "echo tscheck... && tsc --noEmit",
+    "tscheck:w": "npm run tscheck -- --watch",
+    "tsclint": "tsc --noEmit --pretty --strict --forceConsistentCasingInFileNames --noImplicitReturns --noImplicitThis --noUnusedLocals --noUnusedParameters",
+    "tsclint:w": "npm run tsclint -- --watch",
+    "eslint": "eslint src --ext ts",
+    "eslint:fix": "eslint src --ext \"ts\" --fix",
+    "eslint:w": "chokidar \"src/**/*.ts\" --initial -c \"npm run eslint\"",
+    "lint:w": "run-p tsclint:w eslint:w",
+    "semantic-release": "semantic-release",
+    "prepublishOnly": "npm run build",
+    "build": "tsc",
+    "prebuild": "npm run clean",
+    "clean": "rimraf dist",
+    "commit": "git-cz"
+  },
+  "dependencies": {},
+  "devDependencies": {
+    "@semantic-release/changelog": "^2.1.1",
+    "@semantic-release/git": "^6.0.1",
+    "@semantic-release/npm": "^3.3.4",
+    "@types/mocha": "^5.2.3",
+    "@types/node": "^10.5.1",
+    "chokidar-cli": "^1.2.0",
+    "conventional-changelog-eslint": "^3.0.0",
+    "cz-adapter-eslint": "^0.1.2",
+    "eslint": "^5.0.1",
+    "eslint-plugin-import": "^2.13.0",
+    "eslint-plugin-tslint": "^2.1.0",
+    "eslint-plugin-typescript": "^0.12.0",
+    "eslint-plugin-unicorn": "^4.0.3",
+    "mocha": "^5.2.0",
+    "npm-run-all": "^4.1.3",
+    "rimraf": "^2.6.2",
+    "semantic-release": "^15.6.0",
+    "ts-node": "^7.0.0",
+    "tslint": "^5.10.0",
+    "tslint-clean-code": "^0.2.7",
+    "tslint-microsoft-contrib": "^5.0.3",
+    "typescript": "^2.9.2",
+    "typescript-eslint-parser": "^16.0.1"
+  },
+  "engines": {
+    "node": ">=6",
+    "npm": ">=3"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/unlight/typescript-service.git"
+  },
+  "keywords": [],
+  "release": {
+    "generateNotes": {
+      "preset": "eslint"
+    },
+    "analyzeCommits": {
+      "preset": "eslint"
+    },
+    "verifyConditions": [
+      "@semantic-release/changelog",
+      "@semantic-release/github",
+      "@semantic-release/npm",
+      "@semantic-release/git"
+    ],
+    "prepare": [
+      "@semantic-release/changelog",
+      "@semantic-release/npm",
+      "@semantic-release/git"
+    ],
+    "publish": [
+      "@semantic-release/npm",
+      "@semantic-release/github"
+    ],
+    "success": [
+      "@semantic-release/github"
+    ],
+    "fail": [
+      "@semantic-release/github"
+    ]
+  },
+  "config": {
+    "commitizen": {
+      "path": "./node_modules/cz-adapter-eslint"
+    }
+  }
+}

src/index.ts

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+import * as ts from 'typescript';
+import { readFileSync, existsSync } from 'fs';
+import { normalizeCompilerOptions } from './utils';
+
+type createServiceOptions = {
+    configFile: string;
+    compilerOptions?: ts.CompilerOptions;
+};
+
+export function createService({ compilerOptions, configFile }: createServiceOptions) {
+
+    const config = ts.readConfigFile(configFile, ts.sys.readFile);
+    if (config.error) {
+        throw new Error(ts.formatDiagnostics([config.error], {
+            getCanonicalFileName: file => file,
+            getCurrentDirectory: process.cwd,
+            getNewLine: () => '\n',
+        }));
+    }
+
+    const compilationSettings: ts.CompilerOptions = normalizeCompilerOptions({
+        ...((config.config && config.config.compilerOptions) || {}),
+        ...(compilerOptions || {}),
+        noEmit: true,
+        sourceMap: false,
+        inlineSources: false,
+        inlineSourceMap: false,
+    });
+
+    const files: ts.MapLike<{ version: number, snapshot: ts.IScriptSnapshot | undefined }> = {};
+
+    // Caches
+    const fileExistsCache = Object.create(null);
+    const readFileCache = Object.create(null);
+
+    // Create the language service host to allow the LS to communicate with the host
+    const servicesHost: ts.LanguageServiceHost = {
+        getScriptFileNames: () => {
+            return Object.keys(files);
+        },
+        getScriptVersion: (fileName) => {
+            return files[fileName] && String(files[fileName].version);
+        },
+        getScriptSnapshot(this: typeof servicesHost, fileName: string) {
+            let fileRef = files[fileName];
+            if (!fileRef) {
+                files[fileName] = fileRef = { version: 0, snapshot: undefined };
+                if (fileName === 'lib.d.ts') {
+                    fileName = require.resolve('typescript/lib/lib.d.ts').replace(/\\/g, '/');
+                }
+            }
+            if (fileRef.snapshot === undefined) {
+                const data = this.readFile && this.readFile(fileName);
+                fileRef.snapshot = (data != null) ? ts.ScriptSnapshot.fromString(data) : undefined;
+            }
+            return fileRef.snapshot;
+        },
+        getCurrentDirectory: ts.sys.getCurrentDirectory,
+        getCompilationSettings: () => compilationSettings,
+        getDefaultLibFileName: (options) => {
+            return ts.getDefaultLibFileName(options);
+        },
+        fileExists: (file) => {
+            let result = fileExistsCache[file];
+            if (result === undefined) {
+                fileExistsCache[file] = result = existsSync(file);
+            }
+            return result;
+        },
+        readFile: (file) => {
+            let result = readFileCache[file];
+            if (result === undefined) {
+                readFileCache[file] = result = readFileSync(file, 'utf8');
+            }
+            return result;
+        },
+        getDirectories: (directory) => {
+            if (existsSync(directory)) {
+                return ts.sys.getDirectories(directory);
+            }
+            return [];
+        }
+    };
+
+    // Adding libs
+    (compilationSettings.lib || []).forEach(lib => {
+        const fileName = require.resolve(`typescript/lib/lib.${lib}.d.ts`).replace(/\\/g, '/');
+        files[fileName] = { version: 0, snapshot: servicesHost.getScriptSnapshot(fileName) };
+    });
+
+    // Create the language service files
+    const service = ts.createLanguageService(servicesHost, ts.createDocumentRegistry());
+
+    return {
+        update({ fileName, fileContent }: { fileName: string, fileContent: string }) {
+            fileName = fileName.replace(/\\/g, '/');
+            let fileRef = files[fileName];
+            if (!fileRef) {
+                files[fileName] = fileRef = { version: 0, snapshot: undefined };
+            }
+            fileRef.snapshot = ts.ScriptSnapshot.fromString(fileContent);
+            fileRef.version++;
+
+            fileExistsCache[fileName] = true;
+            readFileCache[fileName] = fileContent;
+        },
+        getDiagnostics(fileName: string) {
+            const program = service.getProgram();
+            const sourceFile = program.getSourceFile(fileName);
+            return [
+                ...program.getSyntacticDiagnostics(sourceFile),
+                ...program.getSemanticDiagnostics(sourceFile),
+            ];
+        },
+        getProgram: () => service.getProgram(),
+    };
+}

src/utils.ts

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+import * as ts from 'typescript';
+
+export function normalizeCompilerOptions(options: ts.CompilerOptions = {}) {
+    if (options.target) {
+        options.target = toEnum(ts.ScriptTarget, options.target);
+    }
+    if (options.module) {
+        options.module = toEnum(ts.ModuleKind, options.module);
+    }
+    if (options.moduleResolution) {
+        if (String(options.moduleResolution).toLowerCase() === 'node') {
+            options.moduleResolution = ts.ModuleResolutionKind.NodeJs;
+        }
+        options.moduleResolution = toEnum(ts.ModuleResolutionKind, options.moduleResolution);
+    }
+    return options;
+}
+
+export function toEnum(collection: any, value: any) {
+    let result = value;
+    const valueLower = String(value).toLowerCase();
+    const key = Object.keys(collection).find(value => String(value).toLowerCase() === valueLower);
+    if (key !== undefined) {
+        result = Number(collection[key]);
+        if (Number.isNaN(result)) {
+            result = value;
+        }
+    }
+    return result;
+}