Implement #2

lib/src/commands/spec.dart

@@ -0,0 +1,92 @@
+
+library den.src.commands.spec;
+
+import 'dart:async';
+import 'dart:mirrors';
+import 'dart:io';
+
+import 'package:path/path.dart' as p;
+import 'package:unscripted/unscripted.dart';
+import 'package:prompt/prompt.dart';
+import 'package:pub_semver/pub_semver.dart';
+import 'package:yaml/yaml.dart';
+
+import '../pub.dart';
+import '../theme.dart';
+
+class SpecCommand {
+
+  Pubspec _pubspec;
+  InstanceMirror get _pubspecReflection => reflect(_pubspec);
+  YamlMap get _yamlMap => _pubspec.yamlMap;
+  final fields = ['name','version','author','homepage','description'];
+
+  List<Question> get questions =>
+    fields.map((String field){
+      return new Question("$field (${_yamlMap[field]})");
+    });
+
+  @SubCommand(help: 'Initiate or edit pubspec.yaml file.')
+  spec(
+
+  ) {
+    _prompts();
+  }
+
+  Future _prompts() {
+    var pubspecFile = new File('pubspec.yaml');
+    _pubspec = pubspecFile.existsSync() ? Pubspec.load() : Pubspec.init();
+
+    return Future.forEach(
+      fields,
+      (String field){
+        var defaultValue = _yamlMap[field] != null ? _yamlMap[field] : '';
+
+        var question = defaultValue != ''
+          ? new Question("${theme.question(field)} (${theme.questionDefault(defaultValue)}):", defaultsTo: defaultValue)
+          : new Question(theme.question(field), defaultsTo: '');
+
+        return ask(question)
+        .then((String response){
+          if(response=='') _pubspecReflection.setField(new Symbol(field), defaultValue);
+          else _pubspecReflection.setField(new Symbol(field), response);
+        });
+      }
+    ).whenComplete((){
+
+      var contents = _syntaxHighlighted();
+      print("\npubspec.yaml\n============\n$contents\n");
+      return ask(new Question.confirm("All correct?", defaultsTo:true))
+      .then((bool correct){
+        if(!correct) return _prompts();
+        else {
+          _pubspec.save();
+          return close();
+        }
+      });
+    });
+  }
+
+  String _syntaxHighlighted() {
+    var fieldContents = fields.toSet().intersection(_yamlMap.keys.toSet()).map(
+          (String field) {
+            return "${theme.field(field)}: ${theme.value(_yamlMap[field])}";
+          }
+        ).join("\n");
+
+    var envContents = _yamlMap['environment'] != null ? _block('environment') : '';
+    var depContents = _yamlMap['dependencies'] != null ? _block('dependencies') : '';
+    var devdepContents = _yamlMap['dev_dependencies'] != null ? _block('dev_dependencies') : '';;
+
+    return "$fieldContents$envContents$depContents$devdepContents";
+  }
+
+  String _block(String title) {
+    var lines = _yamlMap[title].keys
+    .map((String key) {
+      var value = "'${_yamlMap[title][key]}'";
+      return "${theme.dependency(key)}: ${theme.value(value)}";
+    }).toList();
+    return "\n${theme.field(title + ':')}\n${lines.map((line) => '  $line').join('\n')}";
+  }
+}

lib/src/den.dart

@@ -7,9 +7,10 @@ import 'commands/bump.dart';
 import 'commands/fetch.dart';
 import 'commands/install.dart';
 import 'commands/pull.dart';
+import 'commands/spec.dart';
 import 'commands/uninstall.dart';
 
-class Den extends Object with BumpCommand, FetchCommand, InstallCommand, PullCommand , UninstallCommand {
+class Den extends Object with BumpCommand, FetchCommand, SpecCommand, InstallCommand, PullCommand , UninstallCommand {
 
   @Command(
       allowTrailingOptions: true,

lib/src/git.dart

@@ -7,6 +7,7 @@ import 'package:pub_semver/pub_semver.dart';
 import 'package:which/which.dart';
 
 Future<ProcessResult> runGit(args, {String workingDirectory}) => Process.run('git', args, workingDirectory: workingDirectory);
+ProcessResult runGitSync(args, {String workingDirectory}) => Process.runSync('git', args, workingDirectory: workingDirectory);
 
 const String _versionTemplate = 'v{v}';
 
@@ -58,10 +59,14 @@ ${status.join("\n")}''');
 Future<bool> checkHasGit() =>
     which('git', orElse: () => null).then((git) => git != null);
 
+bool checkHasGitSync() => whichSync('git', orElse: () => null) != null;
+
 Future<List<String>> gitStatus() => runGit(['status', '--porcelain']).then((processResult) {
   var lines = processResult.stdout.trim().split("\n")
       .where((String line) => line.trim().isNotEmpty && !line.startsWith('?? '))
       .map((line) => line.trim());
   return lines;
 });
 
+String gitConfigUserNameSync() => runGitSync(['config', 'user.name']).stdout.trim();
+String gitConfigUserEmailSync() => runGitSync(['config', 'user.email']).stdout.trim();

lib/src/pub.dart

@@ -11,6 +11,8 @@ import 'package:pub_semver/pub_semver.dart';
 import 'package:yaml/yaml.dart';
 
 import 'yaml_edit.dart';
+import 'git.dart';
+
 
 class Pubspec {
 
@@ -25,14 +27,33 @@ class Pubspec {
   String get path => _path;
   final String _path;
   String get name => _yamlMap['name'];
+  set name(String _name) {
+    contents = setMapKey(_contents, _yamlMap, 'name', _name, false);
+  }
   String get author => _yamlMap['author'];
+  set author(String _author) {
+    _setValue('author', _author);
+  }
   Version get version => new Version.parse(_yamlMap['version']);
   set version(Version v) {
     contents = setMapKey(_contents, _yamlMap, 'version', v.toString(), false);
   }
   String get homepage => _yamlMap['homepage'];
+  set homepage(String _homepage) {
+    _setValue('homepage', _homepage);
+  }
   String get documentation => _yamlMap['documentation'];
   String get description => _yamlMap['description'];
+  set description(String _description) {
+    _setValue('description', _description);
+  }
+  void _setValue(String key, String value) {
+    if(value!=null && value!='') {
+      contents = setMapKey(_contents, _yamlMap, key, value, false);
+    } else {
+      contents = deleteMapKey(_contents, _yamlMap, key);
+    }
+  }
   VersionConstraint get sdkConstraint {
     var env = _yamlMap['environment'];
     if (env == null) return VersionConstraint.any;
@@ -87,6 +108,19 @@ class Pubspec {
       this._contents,
       this._yamlMap);
 
+  static Pubspec init() {
+    var packageRoot = p.current;
+    var pubspecPath = p.join(packageRoot, _PUBSPEC);
+    var contents = "name: ${p.basename(packageRoot)}";
+    var yaml = loadYamlNode(contents, sourceUrl: pubspecPath);
+    var _pubspec = new Pubspec(pubspecPath, contents, yaml);
+
+    _pubspec.version = new Version.parse('0.1.0');
+
+    if(checkHasGitSync()) _pubspec.author = "${gitConfigUserNameSync()} <${gitConfigUserEmailSync()}>";
+
+    return _pubspec;
+  }
   static Pubspec load([String path]) {
     var packageRoot = _getPackageRoot(path == null ? p.current : path);
     var pubspecPath = p.join(packageRoot, _PUBSPEC);

lib/src/theme.dart

@@ -10,6 +10,10 @@ class DenTheme {
   final AnsiPen info = new AnsiPen()..white();
   final AnsiPen warning = new AnsiPen()..yellow();
   final AnsiPen error = new AnsiPen()..red(bold: true);
+  final AnsiPen question = new AnsiPen()..white();
+  final AnsiPen questionDefault = new AnsiPen()..green(bold: true);
+  final AnsiPen field = new AnsiPen()..green(bold: true);
+  final AnsiPen value = new AnsiPen()..blue(bold:true);
 }
 
 final theme = new DenTheme();

pubspec.yaml

@@ -16,6 +16,7 @@ dependencies:
   unscripted: '>=0.5.0 <0.6.0'
   which: '>=0.1.0 <0.2.0'
   yaml: '>=2.0.1+1 <3.0.0'
+  prompt: '>=0.1.3 <0.2.0'
 dev_dependencies:
   unittest: '>=0.11.0 <12.0.0'
 executables: