Create build_jael

build_jael/.gitignore

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+# Created by .ignore support plugin (hsz.mobi)
+### Dart template
+# See https://www.dartlang.org/tools/private-files.html
+
+# Files and directories created by pub
+.packages
+.pub/
+build/
+# If you're building an application, you may want to check-in your pubspec.lock
+pubspec.lock
+
+# Directory created by dartdoc
+# If you don't generate documentation locally you can remove this line.
+doc/api/
+.dart_tool

build_jael/build.yaml

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+builders:
+  jael:
+    target: "build_jael"
+    import: "package:build_jael/build_jael.dart"
+    builder_factories:
+      - jaelBuilder
+    auto_apply: root_package
+    build_extensions:
+      .jl:
+        - ".html"
+    required_inputs:
+      - .jl
+    defaults:
+      generate_for:
+        - "**/*.html"
+        - "*.html"
+        - "**.html"
+targets:
+  $default:
+    sources:
+      - "**/*.html"
+      - "*.html"
+      - "**.html"

build_jael/lib/build_jael.dart

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+import 'dart:async';
+import 'package:build/build.dart';
+import 'package:code_buffer/code_buffer.dart';
+import 'package:file/file.dart';
+import 'package:jael/jael.dart' as jael;
+import 'package:jael_preprocessor/jael_preprocessor.dart';
+
+class JaelBuilder implements Builder {
+  final BuilderOptions options;
+
+  const JaelBuilder(this.options);
+
+  @override
+  Map<String, List<String>> get buildExtensions {
+    return {
+      '.jl': ['.html'],
+    };
+  }
+
+  @override
+  Future build(BuildStep buildStep) async {
+    CodeBuffer buf;
+
+    if (options.config['minify'] == true)
+      buf = new CodeBuffer(space: '', newline: '', trailingNewline: false);
+    else
+      buf = new CodeBuffer();
+
+    Directory dir;
+
+    var errors = <jael.JaelError>[];
+
+    var doc = await jael.parseDocument(
+      await buildStep.readAsString(buildStep.inputId),
+      sourceUrl: buildStep.inputId.uri,
+      onError: errors.add,
+    );
+
+    if (errors.isNotEmpty) {}
+  }
+}

build_jael/pubspec.yaml

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+name: build_jael
+version: 1.0.0
+description: Compile Jael files to HTML using the power of `package:build`.
+author: Tobe O <thosakwe@gmail.com>
+homepage: https://github.com/angel-dart/jael/tree/master/build_jael
+environment:
+  sdk: ">=1.19.0 <=2.0.0"
+dependencies:
+  build: ^0.12.0
+  build_config: ^0.2.0
+  code_buffer: ^1.0.0
+  file: ^2.0.0
+  jael: ^1.0.0-alpha
+  jael_preprocessor: ^1.0.0-alpha
+  symbol_table: ^1.0.0