Read list of files to format from tsconfig.json

If no files to process are specified on the command-line
but a tsconfig.json file exists, then read the list of files
to format from that.

This provides an easy way to reformat all source files
in a TypeScript project using `tsfmt -r`.

Author: robertknight

README.md

@@ -24,6 +24,8 @@ $ tsfmt
 
 ## Usage
 
+### Format or verify specific TypeScript files
+
 ```bash
 $ cat sample.ts
 class Sample {hello(word="world"){return "Hello, "+word;}}
@@ -61,6 +63,17 @@ $ echo $?
 1
 ```
 
+### Reformat all files in a TypeScript project
+
+If no files are specified on the command line but
+a TypeScript project file (tsconfig.json) exists,
+the list of files will be read from the project file.
+
+```bash
+# reads list of files to format from tsconfig.json
+tsfmt -r
+```
+
 ## Note
 
 now `indentSize` parameter is ignored. it is TypeScript compiler matters.

lib/cli.ts

@@ -5,6 +5,7 @@ require("es6-promise").polyfill();
 
 import fs = require("fs");
 import commandpost = require("commandpost");
+import path = require("path");
 
 import lib = require("./index");
 
@@ -35,60 +36,65 @@ var root = commandpost
     .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;
-        var tsfmt = !!opts.tsfmt;
-
-        if (args.files.length === 0 && !opts.stdin) {
-            process.stdout.write(root.helpText() + '\n');
-            return;
-        }
+    var replace = !!opts.replace;
+    var verify = !!opts.verify;
+    var stdin = !!opts.stdin;
+    var tslint = !!opts.tslint;
+    var editorconfig = !!opts.editorconfig;
+    var tsfmt = !!opts.tsfmt;
 
-        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"));
-            console.log("tsfmt:		" + (tsfmt ? "ON" : "OFF"));
-        }
+    var files = args.files;
+    if (files.length === 0 && fs.existsSync("tsconfig.json")) {
+        files = readFilesFromTsconfig("tsconfig.json");
+    }
 
-        if (opts.stdin) {
-            if (opts.replace) {
-                errorHandler("--stdin option can not use with --replace option");
-                return;
-            }
-            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);
+    if (files.length === 0 && !opts.stdin) {
+        process.stdout.write(root.helpText() + '\n');
+        return;
+    }
+
+    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"));
+        console.log("tsfmt:		" + (tsfmt ? "ON" : "OFF"));
+    }
+
+    if (opts.stdin) {
+        if (opts.replace) {
+            errorHandler("--stdin option can not use with --replace option");
+            return;
         }
-    });
+        lib
+            .processStream(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(files, {
+            replace: replace,
+            verify: verify,
+            tslint: tslint,
+            editorconfig: editorconfig,
+            tsfmt: tsfmt
+        })
+            .then(showResultHandler)
+            .catch(errorHandler);
+    }
+});
 
 commandpost
     .exec(root, process.argv)
@@ -108,10 +114,10 @@ function showResultHandler(resultMap: lib.ResultMap): Promise<any> {
         Object.keys(resultMap)
             .map(fileName => resultMap[fileName])
             .forEach(result => {
-                if (result.message) {
-                    console.log(result.message);
-                }
-            });
+            if (result.message) {
+                console.log(result.message);
+            }
+        });
     }
     return null;
 }
@@ -129,3 +135,16 @@ function errorHandler(err: any): Promise<any> {
         return null;
     });
 }
+
+function readFilesFromTsconfig(configPath: string) {
+    "use strict";
+
+    var tsconfigDir = path.dirname(configPath);
+    var tsconfig = JSON.parse(fs.readFileSync(configPath, "utf-8"));
+    if (tsconfig.files) {
+        var files: string[] = tsconfig.files;
+        return files.map(filePath => path.resolve(tsconfigDir, filePath));
+    } else {
+        throw new Error(`No "files" section present in tsconfig.json`);
+    }
+}