Merge pull request #4 from gql-dart/info-command

implement info command

Author: klavs

Diff for: CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.4
+
+- implement info command to print GraphViz dor file
+
 ## 0.1.3
 
 - upgrade `directed_graph: ^0.1.4`

Diff for: bin/multipack.dart

@@ -47,6 +47,7 @@ void main(List<String> arguments) async {
 
   runner.addCommand(PubCommand(orderedPackages));
   runner.addCommand(FmtCommand(orderedPackages));
+  runner.addCommand(InfoCommand(orderedPackages));
   runner.addCommand(AnalyzeCommand(orderedPackages));
   runner.addCommand(ExecCommand(orderedPackages));
   runner.addCommand(PubspecCommand(orderedPackages));

Diff for: lib/commands.dart

@@ -6,5 +6,6 @@ import "package:meta/meta.dart";
 export "commands/analyze.dart";
 export "commands/exec.dart";
 export "commands/fmt.dart";
+export "commands/info.dart";
 export "commands/pub.dart";
 export "commands/pubspec.dart";

Diff for: lib/commands/info.dart

@@ -0,0 +1,84 @@
+import "dart:async";
+import "dart:math";
+
+import "package:args/command_runner.dart";
+
+import "package:multipack/package.dart";
+
+String toHex(int color) {
+  final colorString = color.toRadixString(16);
+
+  return [if (colorString.length == 1) "0", colorString].join();
+}
+
+String getColor(String name) {
+  final random = Random(name.hashCode);
+
+  final r = random.nextInt(256);
+  final g = random.nextInt(256);
+  final b = random.nextInt(256);
+
+  return [
+    "#",
+    toHex(r),
+    toHex(g),
+    toHex(b),
+  ].join();
+}
+
+class InfoCommand extends Command<void> {
+  @override
+  final String name = "info";
+
+  @override
+  final String description = "Show info about local packages.";
+
+  final List<Package> packages;
+
+  InfoCommand(this.packages);
+
+  @override
+  FutureOr<void> run() {
+    print("digraph packages {");
+    print('  size="10"; ratio=fill;');
+
+    for (final package in packages) {
+      print(
+          '  ${package.name} [shape="box"; color="${getColor(package.name)}"];');
+    }
+
+    for (final package in packages) {
+      package.pubspec.allDependencies.keys
+          .where((dep) => packages.any((package) => package.name == dep))
+          .forEach((dep) {
+        final attrs = package.pubspec.dependencies.containsKey(dep)
+            ? 'style="filled"; color="${getColor(dep)}"'
+            : 'style="dashed"; color="${getColor(dep)}"';
+        print("  ${package.name} -> ${dep} [${attrs}];");
+      });
+    }
+
+    final groupedPackages =
+        packages.fold<Map<String, List<Package>>>({}, (grouped, package) {
+      if (!grouped.containsKey(package.namespace)) {
+        grouped[package.namespace] = [];
+      }
+
+      grouped[package.namespace].add(package);
+
+      return grouped;
+    });
+
+    groupedPackages.forEach((namespace, packagesInGroup) {
+      print('  subgraph "cluster ${namespace}" {');
+      print('    label="${namespace}";');
+      print('    color="${getColor(namespace)}";');
+      packagesInGroup.forEach((package) {
+        print("    ${package.name};");
+      });
+      print("  }");
+    });
+
+    print("}");
+  }
+}

Diff for: lib/package.dart

@@ -31,12 +31,14 @@ final failurePen = AnsiPen()
 
 class Package {
   final Directory directory;
+  final String namespace;
   final String name;
   final PubSpec pubspec;
   final bool isFlutter;
 
   const Package({
     this.directory,
+    this.namespace,
     this.name,
     this.pubspec,
     this.isFlutter,
@@ -144,8 +146,18 @@ Stream<Package> findPackages(Directory root) =>
       (dir) async {
         final pubspec = await PubSpec.load(dir);
 
+        final dirPath = dir.path;
+        final rootPath = root.path;
+
+        final rootIndex = rootPath.length;
+        final dirIndex = dirPath.lastIndexOf(Platform.pathSeparator);
+
         return Package(
           directory: dir,
+          namespace: dirPath.substring(
+            rootIndex == dirIndex ? rootIndex : rootIndex + 1,
+            dirIndex,
+          ),
           name: pubspec.name,
           isFlutter: pubspec.allDependencies.containsKey("flutter"),
           pubspec: pubspec,

Diff for: pubspec.yaml

@@ -1,18 +1,18 @@
 name: multipack
 description: A tool for monorepo management. Link local packages and execute commands in topological order.
-version: 0.1.3
+version: 0.1.4
 homepage: https://github.com/gql-dart/multipack
 environment: 
-  sdk: '>=2.7.2 <3.0.0'
+  sdk: '>=2.8.0 <3.0.0'
 dependencies: 
   ansicolor: ^1.0.2
   args: ^1.6.0
-  directed_graph: ^0.1.4
+  directed_graph: ^0.2.3
   meta: ^1.0.0
   pubspec: ^0.1.2
   pub_semver: ^1.4.4
   path: ^1.6.4
 dev_dependencies: 
   gql_pedantic: ^1.0.1
-executables: 
+executables:
   multipack: null