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//// [tests/cases/compiler/APISample_watcher.ts] ////
//// [index.d.ts]
declare module "typescript" {
export = ts;
}
//// [APISample_watcher.ts]
/*
* Note: This test is a public API sample. The sample sources can be found
* at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
* Please log a "breaking change" issue for any API breaking change affecting this issue
*/
declare var process: any;
declare var console: any;
declare var fs: {
existsSync(path: string): boolean;
readdirSync(path: string): string[];
readFileSync(filename: string, encoding?: string): string;
writeFileSync(filename: string, data: any, options?: { encoding?: string; mode?: number; flag?: string; } | string): void;
watchFile(filename: string, options: { persistent?: boolean; interval?: number; }, listener: (curr: { mtime: Date }, prev: { mtime: Date }) => void): void;
};
declare var path: any;
import * as ts from "typescript";
function watch(rootFileNames: string[], options: ts.CompilerOptions) {
const files: ts.MapLike<{ version: number }> = {};
// initialize the list of files
rootFileNames.forEach(fileName => {
files[fileName] = { version: 0 };
});
// Create the language service host to allow the LS to communicate with the host
const servicesHost: ts.LanguageServiceHost = {
getScriptFileNames: () => rootFileNames,
getScriptVersion: (fileName) => files[fileName] && files[fileName].version.toString(),
getScriptSnapshot: (fileName) => {
if (!fs.existsSync(fileName)) {
return undefined;
}
return ts.ScriptSnapshot.fromString(fs.readFileSync(fileName).toString());
},
getCurrentDirectory: () => process.cwd(),
getCompilationSettings: () => options,
getDefaultLibFileName: (options) => ts.getDefaultLibFilePath(options),
};
// Create the language service files
const services = ts.createLanguageService(servicesHost, ts.createDocumentRegistry())
// Now let's watch the files
rootFileNames.forEach(fileName => {
// First time around, emit all files
emitFile(fileName);
// Add a watch on the file to handle next change
fs.watchFile(fileName,
{ persistent: true, interval: 250 },
(curr, prev) => {
// Check timestamp
if (+curr.mtime <= +prev.mtime) {
return;
}
// Update the version to signal a change in the file
files[fileName].version++;
// write the changes to disk
emitFile(fileName);
});
});
function emitFile(fileName: string) {
let output = services.getEmitOutput(fileName);
if (!output.emitSkipped) {
console.log(`Emitting ${fileName}`);
}
else {
console.log(`Emitting ${fileName} failed`);
logErrors(fileName);
}
output.outputFiles.forEach(o => {
fs.writeFileSync(o.name, o.text, "utf8");
});
}
function logErrors(fileName: string) {
let allDiagnostics = services.getCompilerOptionsDiagnostics()
.concat(services.getSyntacticDiagnostics(fileName))
.concat(services.getSemanticDiagnostics(fileName));
allDiagnostics.forEach(diagnostic => {
let message = ts.flattenDiagnosticMessageText(diagnostic.messageText, "\n");
if (diagnostic.file) {
let { line, character } = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start!);
console.log(` Error ${diagnostic.file.fileName} (${line + 1},${character + 1}): ${message}`);
}
else {
console.log(` Error: ${message}`);
}
});
}
}
// Initialize files constituting the program as all .ts files in the current directory
const currentDirectoryFiles = fs.readdirSync(process.cwd()).
filter(fileName=> fileName.length >= 3 && fileName.substr(fileName.length - 3, 3) === ".ts");
// Start the watcher
watch(currentDirectoryFiles, { module: ts.ModuleKind.CommonJS });
//// [APISample_watcher.js]
"use strict";
/*
* Note: This test is a public API sample. The sample sources can be found
* at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
* Please log a "breaking change" issue for any API breaking change affecting this issue
*/
exports.__esModule = true;
var ts = require("typescript");
function watch(rootFileNames, options) {
var files = {};
// initialize the list of files
rootFileNames.forEach(function (fileName) {
files[fileName] = { version: 0 };
});
// Create the language service host to allow the LS to communicate with the host
var servicesHost = {
getScriptFileNames: function () { return rootFileNames; },
getScriptVersion: function (fileName) { return files[fileName] && files[fileName].version.toString(); },
getScriptSnapshot: function (fileName) {
if (!fs.existsSync(fileName)) {
return undefined;
}
return ts.ScriptSnapshot.fromString(fs.readFileSync(fileName).toString());
},
getCurrentDirectory: function () { return process.cwd(); },
getCompilationSettings: function () { return options; },
getDefaultLibFileName: function (options) { return ts.getDefaultLibFilePath(options); }
};
// Create the language service files
var services = ts.createLanguageService(servicesHost, ts.createDocumentRegistry());
// Now let's watch the files
rootFileNames.forEach(function (fileName) {
// First time around, emit all files
emitFile(fileName);
// Add a watch on the file to handle next change
fs.watchFile(fileName, { persistent: true, interval: 250 }, function (curr, prev) {
// Check timestamp
if (+curr.mtime <= +prev.mtime) {
return;
}
// Update the version to signal a change in the file
files[fileName].version++;
// write the changes to disk
emitFile(fileName);
});
});
function emitFile(fileName) {
var output = services.getEmitOutput(fileName);
if (!output.emitSkipped) {
console.log("Emitting " + fileName);
}
else {
console.log("Emitting " + fileName + " failed");
logErrors(fileName);
}
output.outputFiles.forEach(function (o) {
fs.writeFileSync(o.name, o.text, "utf8");
});
}
function logErrors(fileName) {
var allDiagnostics = services.getCompilerOptionsDiagnostics()
.concat(services.getSyntacticDiagnostics(fileName))
.concat(services.getSemanticDiagnostics(fileName));
allDiagnostics.forEach(function (diagnostic) {
var message = ts.flattenDiagnosticMessageText(diagnostic.messageText, "\n");
if (diagnostic.file) {
var _a = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start), line = _a.line, character = _a.character;
console.log(" Error " + diagnostic.file.fileName + " (" + (line + 1) + "," + (character + 1) + "): " + message);
}
else {
console.log(" Error: " + message);
}
});
}
}
// Initialize files constituting the program as all .ts files in the current directory
var currentDirectoryFiles = fs.readdirSync(process.cwd()).
filter(function (fileName) { return fileName.length >= 3 && fileName.substr(fileName.length - 3, 3) === ".ts"; });
// Start the watcher
watch(currentDirectoryFiles, { module: ts.ModuleKind.CommonJS });
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