feat(tsfmt): support --verify option closes #15

lib/cli.ts

@@ -12,6 +12,7 @@ var packageJson = JSON.parse(fs.readFileSync(__dirname + "/../package.json").toS
 
 interface RootOptions {
 	replace:boolean;
+	verify:boolean;
 	stdin:boolean;
 	tslint:boolean;
 	editorconfig:boolean;
@@ -27,13 +28,15 @@ var root = commandpost
 	.create<RootOptions, RootArguments>("tsfmt [files...]")
 	.version(packageJson.version, "-v, --version")
 	.option("-r, --replace", "replace .ts file")
+	.option("--verify", "checking file format")
 	.option("--stdin", "get formatting content from stdin")
 	.option("--no-tslint", "don't read a tslint.json")
 	.option("--no-editorconfig", "don't read a .editorconfig")
 	.option("--no-tsfmt", "don't read a tsfmt.json")
 	.option("--verbose", "makes output more verbose")
 	.action((opts, args)=> {
 		var replace = !!opts.replace;
+		var verify = !!opts.verify;
 		var stdin = !!opts.stdin;
 		var tslint = !!opts.tslint;
 		var editorconfig = !!opts.editorconfig;
@@ -46,6 +49,7 @@ var root = commandpost
 
 		if (opts.verbose) {
 			console.log("replace:	  " + (replace ? "ON" : "OFF"));
+			console.log("verify:	   " + (verify ? "ON" : "OFF"));
 			console.log("stdin:		" + (stdin ? "ON" : "OFF"));
 			console.log("tslint:	   " + (tslint ? "ON" : "OFF"));
 			console.log("editorconfig: " + (editorconfig ? "ON" : "OFF"));
@@ -60,19 +64,28 @@ var root = commandpost
 			lib
 				.processStream(args.files[0] || "temp.ts", process.stdin, {
 					replace: replace,
+					verify: verify,
 					tslint: tslint,
 					editorconfig: editorconfig,
 					tsfmt: tsfmt
 				})
+				.then(result => {
+					var resultMap: lib.ResultMap = {};
+					resultMap[result.fileName] = result;
+					return resultMap;
+				})
+				.then(showResultHandler)
 				.catch(errorHandler);
 		} else {
 			lib
 				.processFiles(args.files, {
 					replace: replace,
+					verify: verify,
 					tslint: tslint,
 					editorconfig: editorconfig,
 					tsfmt: tsfmt
 				})
+				.then(showResultHandler)
 				.catch(errorHandler);
 		}
 	});
@@ -81,6 +94,28 @@ commandpost
 	.exec(root, process.argv)
 	.catch(errorHandler);
 
+function showResultHandler(resultMap: lib.ResultMap): Promise<any> {
+	"use strict";
+
+	var hasError = Object.keys(resultMap).filter(fileName => resultMap[fileName].error).length !== 0;
+	if (hasError) {
+		Object.keys(resultMap)
+			.map(fileName => resultMap[fileName])
+			.filter(result => result.error)
+			.forEach(result => console.error(result.message));
+		process.exit(1);
+	} else {
+		Object.keys(resultMap)
+			.map(fileName => resultMap[fileName])
+			.forEach(result => {
+				if (result.message) {
+					console.log(result.message);
+				}
+			});
+	}
+	return null;
+}
+
 function errorHandler(err:any): Promise<any> {
 	"use strict";
 

lib/index.ts

@@ -18,6 +18,7 @@ export interface Options {
 	dryRun?: boolean;
 	verbose?: boolean;
 	replace: boolean;
+	verify: boolean;
 	tslint: boolean;
 	editorconfig: boolean;
 	tsfmt: boolean;
@@ -30,6 +31,8 @@ export interface ResultMap {
 export interface Result {
 	fileName: string;
 	options: ts.FormatCodeOptions;
+	message: string;
+	error: boolean;
 	src: string;
 	dest: string;
 }
@@ -40,9 +43,15 @@ export function processFiles(files:string[], opts:Options):Promise<ResultMap> {
 	var resultMap:ResultMap = {};
 	var promises = files.map(fileName => {
 		if (!fs.existsSync(fileName)) {
-			console.error(fileName + " is not exists. process abort.");
-			process.exit(1);
-			return;
+			var result:Result = {
+				fileName: fileName,
+				options: null,
+				message: `${fileName} is not exists. process abort.`,
+				error: true,
+				src: "",
+				dest: ""
+			};
+			return Promise.resolve(result);
 		}
 
 		var content = fs.readFileSync(fileName).toString();
@@ -97,18 +106,27 @@ export function processString(fileName:string, content:string, opts:Options):Pro
 		.then(()=> {
 			var formattedCode = formatter(content, options);
 			// TODO replace newline code. NewLineCharacter params affect to only "new" newline. maybe.
-			if (opts && opts.replace) {
+			var message: string;
+			var error = false;
+			if (opts && opts.verify) {
+				if (content !== formattedCode) {
+					message = `${fileName} is not formatted`;
+					error = true;
+				}
+			} else if (opts && opts.replace) {
 				if (content !== formattedCode) {
 					fs.writeFileSync(fileName, formattedCode);
-					console.log("replaced " + fileName);
+					message = `replaced ${fileName}`;
 				}
 			} else if (opts && !opts.dryRun) {
-				console.log(formattedCode);
+				message = formattedCode;
 			}
 
 			var result:Result = {
 				fileName: fileName,
 				options: options,
+				message: message,
+				error: error,
 				src: content,
 				dest: formattedCode
 			};

test/indexSpec.ts

@@ -88,13 +88,15 @@ describe("tsfmt test", () => {
 						.processFiles([fileName], {
 							dryRun: true,
 							replace: false,
+							verify: false,
 							tslint: true,
 							editorconfig: true,
 							tsfmt: true
 						})
 						.then(resultMap => {
 							var result = resultMap[fileName];
 							assert(result !== null);
+							assert(result.error === false);
 
 							var expectedTsFileName = fileName.replace(fixtureDir, expectedDir);
 							// console.log(fileName, expectedFileName);
@@ -131,8 +133,24 @@ describe("tsfmt test", () => {
 						});
 				});
 			});
-	});
 
+			it("verify unformatted file", () => {
+				var fileName = "./test/fixture/tsfmt/a/main.ts";
+				return lib
+					.processFiles([fileName], {
+						dryRun: true,
+						replace: false,
+						verify: true,
+						tslint: true,
+						editorconfig: true,
+						tsfmt: true
+					})
+					.then(resultMap => {
+						assert(resultMap[fileName].error);
+						assert(resultMap[fileName].message === "./test/fixture/tsfmt/a/main.ts is not formatted");
+					});
+			});
+	});
 
 	describe("processStream function", () => {
 		var fileName = "test/fixture/default/main.ts";
@@ -144,12 +162,14 @@ describe("tsfmt test", () => {
 				.processStream(fileName, input, {
 					dryRun: true,
 					replace: false,
+					verify: false,
 					tslint: true,
 					editorconfig: true,
 					tsfmt: true
 				})
 				.then(result=> {
 					assert(result !== null);
+					assert(result.error === false);
 					assert(result.dest === `class Sample { getString(): string { return "hi!"; } }`);
 				});
 		});

typescript-formatter.d.ts

@@ -8,6 +8,7 @@ declare module 'typescript-formatter' {
         dryRun?: boolean;
         verbose?: boolean;
         replace: boolean;
+        verify: boolean;
         tslint: boolean;
         editorconfig: boolean;
         tsfmt: boolean;
@@ -18,6 +19,8 @@ declare module 'typescript-formatter' {
     export interface Result {
         fileName: string;
         options: ts.FormatCodeOptions;
+        message: string;
+        error: boolean;
         src: string;
         dest: string;
     }