Initial commit.

.gitignore

@@ -0,0 +1,88 @@
+!.vscode/extensions.json
+!.vscode/launch.json
+!.vscode/settings.json
+!.vscode/tasks.json
+*.class
+*.code-workspace
+*.ctxt
+*.iws
+*.log
+*.nar
+*.rar
+*.sublime-*
+*.tar.gz
+*.zip
+.DS_Store
+.classpath
+.dart_tool/
+.gradle
+.history
+.kobalt
+.mtj.tmp/
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+.nb-gradle
+.packages
+.project
+.scannerwork
+.settings
+.vscode/*
+/**/.idea/$CACHE_FILE$
+/**/.idea/$PRODUCT_WORKSPACE_FILE$
+/**/.idea/**/caches/build_file_checksums.ser
+/**/.idea/**/contentModel.xml
+/**/.idea/**/dataSources.ids
+/**/.idea/**/dataSources.local.xml
+/**/.idea/**/dataSources/
+/**/.idea/**/dbnavigator.xml
+/**/.idea/**/dictionaries
+/**/.idea/**/dynamic.xml
+/**/.idea/**/gradle.xml
+/**/.idea/**/httpRequests
+/**/.idea/**/libraries
+/**/.idea/**/mongoSettings.xml
+/**/.idea/**/replstate.xml
+/**/.idea/**/shelf
+/**/.idea/**/shelf/
+/**/.idea/**/sqlDataSources.xml
+/**/.idea/**/tasks.xml
+/**/.idea/**/uiDesigner.xml
+/**/.idea/**/usage.statistics.xml
+/**/.idea/**/workspace.xml
+/**/.idea/sonarlint*
+/**/.idea_modules/
+Thumbs.db
+__pycache__
+atlassian-ide-plugin.xml
+bin/dcat
+bin/dcat.exe
+build/
+cmake-build-*/
+com_crashlytics_export_strings.xml
+crashlytics-build.properties
+crashlytics.properties
+dependency-reduced-pom.xml
+deploy/
+dist/
+ehthumbs.db
+fabric.properties
+gen/
+gradle.properties
+hs_err_pid*
+kobaltBuild
+kobaltw*-test
+lib/kotlin*
+libs/
+local.properties
+out/
+pom.xml.asc
+pom.xml.next
+pom.xml.releaseBackup
+pom.xml.tag
+pom.xml.versionsBackup
+proguard-project.txt
+project.properties
+release.properties
+target/
+test-output
+venv

.idea/.gitignore

@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml

.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,43 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="JavaDoc" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="TOP_LEVEL_CLASS_OPTIONS">
+        <value>
+          <option name="ACCESS_JAVADOC_REQUIRED_FOR" value="none" />
+          <option name="REQUIRED_TAGS" value="" />
+        </value>
+      </option>
+      <option name="INNER_CLASS_OPTIONS">
+        <value>
+          <option name="ACCESS_JAVADOC_REQUIRED_FOR" value="none" />
+          <option name="REQUIRED_TAGS" value="" />
+        </value>
+      </option>
+      <option name="METHOD_OPTIONS">
+        <value>
+          <option name="ACCESS_JAVADOC_REQUIRED_FOR" value="none" />
+          <option name="REQUIRED_TAGS" value="@return@param@throws or @exception" />
+        </value>
+      </option>
+      <option name="FIELD_OPTIONS">
+        <value>
+          <option name="ACCESS_JAVADOC_REQUIRED_FOR" value="none" />
+          <option name="REQUIRED_TAGS" value="" />
+        </value>
+      </option>
+      <option name="IGNORE_DEPRECATED" value="false" />
+      <option name="IGNORE_JAVADOC_PERIOD" value="true" />
+      <option name="IGNORE_DUPLICATED_THROWS" value="false" />
+      <option name="IGNORE_POINT_TO_ITSELF" value="false" />
+      <option name="myAdditionalJavadocTags" value="created" />
+    </inspection_tool>
+    <inspection_tool class="LocalCanBeFinal" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="REPORT_VARIABLES" value="true" />
+      <option name="REPORT_PARAMETERS" value="true" />
+      <option name="REPORT_CATCH_PARAMETERS" value="false" />
+      <option name="REPORT_IMPLICIT_FINALS" value="false" />
+    </inspection_tool>
+    <inspection_tool class="RedundantExplicitVariableType" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+  </profile>
+</component>

.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/dcat.iml" filepath="$PROJECT_DIR$/dcat.iml" />
+    </modules>
+  </component>
+</project>

.idea/runConfigurations.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="com.android.tools.idea.compose.preview.runconfiguration.ComposePreviewRunConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

CHANGELOG.md

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+## 1.0.0
+
+- Initial version.

LICENSE

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+BSD 3-Clause License
+
+Copyright (c) 2021, Erik C. Thauvin (erik@thauvin.net)
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of this project nor the names of its contributors may be
+  used to endorse or promote products derived from this software without
+  specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+Concatenate file(s) to standard output.
+

analysis_options.yaml

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+# This file configures the static analysis results for your project (errors,
+# warnings, and lints).
+#
+# This enables the 'recommended' set of lints from `package:lints`.
+# This set helps identify many issues that may lead to problems when running
+# or consuming Dart code, and enforces writing Dart using a single, idiomatic
+# style and format.
+#
+# If you want a smaller set of lints you can change this to specify
+# 'package:lints/core.yaml'. These are just the most critical lints
+# (the recommended set includes the core lints).
+# The core lints are also what is used by pub.dev for scoring packages.
+
+include: package:lints/recommended.yaml
+
+# Uncomment the following section to specify additional rules.
+
+# linter:
+#   rules:
+#     - camel_case_types
+
+# analyzer:
+#   exclude:
+#     - path/to/excluded/files/**
+
+# For more information about the core and recommended set of lints, see
+# https://dart.dev/go/core-lints
+
+# For additional information about configuring this file, see
+# https://dart.dev/guides/language/analysis-options

bin/dcat.dart

@@ -0,0 +1,200 @@
+// Copyright (c) 2021, Erik C. Thauvin. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be found
+// in the LICENSE file.
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:args/args.dart';
+import 'package:indent/indent.dart';
+
+const appName = 'dcat';
+const appVersion = '1.0.0';
+const exitFailure = 1;
+const exitSuccess = 0;
+const helpFlag = 'help';
+const nonBlankFlag = 'number-nonblank';
+const numberFlag = 'number';
+const showEndsFlag = 'show-ends';
+const showTabsFlag = 'show-tabs';
+const squeezeBlank = 'squeeze-blank';
+const versionFlag = 'version';
+
+/// Prints [message] and [path] to stderr.
+Future<int> handleError(String message, {String path = ''}) async {
+  if (path.isNotEmpty) {
+    stderr.writeln('$appName: $path: $message');
+  } else {
+    stderr.write('$appName: $message');
+  }
+  return exitFailure;
+}
+
+/// Concatenates files in [paths].
+Future<int> cat(List<String> paths,
+    {List<String>? log,
+    bool showEnds = false,
+    bool numberNonBlank = false,
+    bool showLineNumbers = false,
+    bool showTabs = false,
+    bool squeezeBlank = false}) async {
+  var lineNumber = 1;
+  var returnCode = 0;
+  log?.clear();
+  if (paths.isEmpty) {
+    final lines = await _readStdin();
+    await _writeLines(lines, lineNumber, log, showEnds, showLineNumbers,
+        numberNonBlank, showTabs, squeezeBlank);
+  } else {
+    for (final path in paths) {
+      try {
+        final Stream<String> lines;
+        if (path == '-') {
+          lines = await _readStdin();
+        } else {
+          lines = utf8.decoder
+              .bind(File(path).openRead())
+              .transform(const LineSplitter());
+        }
+        lineNumber = await _writeLines(lines, lineNumber, log, showEnds,
+            showLineNumbers, numberNonBlank, showTabs, squeezeBlank);
+      } on FileSystemException catch (e) {
+        final String? osMessage = e.osError?.message;
+        final String message;
+        if (osMessage != null && osMessage.isNotEmpty) {
+          message = osMessage;
+        } else {
+          message = e.message;
+        }
+        returnCode = await handleError(message, path: path);
+      } on FormatException {
+        returnCode =
+            await handleError('Binary file not supported.', path: path);
+      } catch (e) {
+        returnCode = await handleError(e.toString(), path: path);
+      }
+    }
+  }
+  return returnCode;
+}
+
+/// Concatenates files specified in [arguments].
+///
+/// ```
+/// dcat [OPTION]... [FILE]...
+/// ```
+Future<int> main(List<String> arguments) async {
+  final parser = ArgParser();
+  Future<int> returnCode;
+  exitCode = exitSuccess;
+  parser.addFlag(nonBlankFlag,
+      negatable: false,
+      abbr: 'b',
+      help: 'number nonempty output lines, overrides -n');
+  parser.addFlag(showEndsFlag,
+      negatable: false, abbr: 'E', help: 'display \$ at end of each line');
+  parser.addFlag(helpFlag,
+      negatable: false, abbr: 'h', help: 'display this help and exit');
+  parser.addFlag(numberFlag,
+      negatable: false, abbr: 'n', help: 'number all output lines');
+  parser.addFlag(showTabsFlag,
+      negatable: false, abbr: 'T', help: 'display TAB characters as ^I');
+  parser.addFlag(squeezeBlank,
+      negatable: false,
+      abbr: 's',
+      help: 'suppress repeated empty output lines');
+  parser.addFlag(versionFlag,
+      negatable: false, help: 'output version information and exit');
+
+  final ArgResults argResults;
+  try {
+    argResults = parser.parse(arguments);
+  } on FormatException catch (e) {
+    return await handleError(
+        "${e.message}\nTry '$appName --$helpFlag' for more information.");
+  }
+
+  if (argResults[helpFlag]) {
+    returnCode = usage(parser.usage);
+  } else if (argResults[versionFlag]) {
+    returnCode = printVersion();
+  } else {
+    final paths = argResults.rest;
+    returnCode = cat(paths,
+        showEnds: argResults[showEndsFlag],
+        showLineNumbers: argResults[numberFlag],
+        numberNonBlank: argResults[nonBlankFlag],
+        showTabs: argResults[showTabsFlag],
+        squeezeBlank: argResults[squeezeBlank]);
+  }
+
+  exitCode = await returnCode;
+  return exitCode;
+}
+
+/// Prints version info.
+Future<int> printVersion() async {
+  print('''$appName (Dart cat) $appVersion
+Copyright (C) 2021 Erik C. Thauvin
+License: 3-Clause BSD <https://opensource.org/licenses/BSD-3-Clause>
+ 
+Based on <https://dart.dev/tutorials/server/cmdline>
+Written by Erik C. Thauvin <https://erik.thauvin.net/>''');
+  return exitSuccess;
+}
+
+/// Reads from stdin.
+Future<Stream<String>> _readStdin() async =>
+    stdin.transform(utf8.decoder).transform(const LineSplitter());
+
+/// Prints usage with [options].
+Future<int> usage(String options) async {
+  print('''Usage: $appName [OPTION]... [FILE]...
+Concatenate FILE(s) to standard output.
+
+With no FILE, or when FILE is -, read standard input.
+
+${options.indent(2)}
+Examples:
+  $appName f - g  Output f's contents, then standard input, then g's contents.
+  $appName        Copy standard input to standard output.
+  
+ Source and documentation: <https://github.com/ethauvin/dcat>''');
+  return exitSuccess;
+}
+
+/// Writes lines to stdout.
+Future<int> _writeLines(Stream<String> lines, int lineNumber,
+    [List<String>? log,
+    bool showEnds = false,
+    bool showLineNumbers = false,
+    bool showNonBlank = false,
+    bool showTabs = false,
+    bool sqeezeBlank = false]) async {
+  var emptyLine = 0;
+  final sb = StringBuffer();
+  await for (final line in lines) {
+    sb.clear();
+    if (sqeezeBlank && line.isEmpty) {
+      if (++emptyLine >= 2) {
+        continue;
+      }
+    } else {
+      emptyLine = 0;
+    }
+    if (showNonBlank || showLineNumbers) {
+      sb.write('${lineNumber++}: ');
+    }
+    if (showTabs) {
+      sb.write(line.replaceAll('\t', '^I'));
+    } else {
+      sb.write(line);
+    }
+    if (showEnds) {
+      sb.write('\$');
+    }
+
+    log?.add(sb.toString());
+    stdout.writeln(sb);
+  }
+  return lineNumber;
+}

dcat.iml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/.pub" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
+      <excludeFolder url="file://$MODULE_DIR$/.dart_tool" />
+    </content>
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Dart SDK" level="project" />
+    <orderEntry type="library" name="Dart Packages" level="project" />
+  </component>
+</module>

pubspec.lock

@@ -0,0 +1,348 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "28.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.5.0"
+  args:
+    dependency: "direct main"
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.0"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.8.2"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.1"
+  cli_util:
+    dependency: transitive
+    description:
+      name: cli_util
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.3.4"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.15.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.2"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.2"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.2"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.0.0"
+  indent:
+    dependency: "direct main"
+    description:
+      name: indent
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.3"
+  lints:
+    dependency: "direct dev"
+    description:
+      name: lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.12.11"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.7.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.2"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.0"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.5.0"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.0"
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.10.10"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.1"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.10.0"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  test:
+    dependency: "direct dev"
+    description:
+      name: test
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.18.2"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.4.5"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.4.5"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "7.3.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.0"
+sdks:
+  dart: ">=2.14.3 <3.0.0"

pubspec.yaml

@@ -0,0 +1,14 @@
+name: dcat
+description: Concatenate file(s) to standard output.
+version: 1.0.0
+homepage: https://github.com/ethauvin/dcat
+
+environment:
+  sdk: '>=2.14.3 <3.0.0'
+
+dev_dependencies:
+  lints: ^1.0.0
+  test: ^1.18.2
+dependencies: 
+  args: ^2.3.0
+  indent: ^2.0.0

test/dcat_test.dart

@@ -0,0 +1,102 @@
+import 'package:test/test.dart';
+
+import '../bin/dcat.dart' as dcat;
+
+void main() {
+  final List<String> log = [];
+  int exitCode;
+
+  test('Test Help', () async {
+    expect(dcat.main(['-h']), completion(equals(0)));
+    expect(dcat.main(['--help']), completion(equals(0)));
+    exitCode = await dcat.main(['-h']);
+    expect(exitCode, equals(dcat.exitSuccess));
+  });
+
+  test('Test --version', () async {
+    expect(dcat.main(['--version']), completion(equals(0)));
+    exitCode = await dcat.main(['--version']);
+    expect(exitCode, equals(dcat.exitSuccess));
+  });
+
+  test('Test directory', () async {
+    exitCode = await dcat.main(['bin']);
+    expect(exitCode, equals(dcat.exitFailure));
+  });
+
+  test('Test missing file', () async {
+    exitCode = await dcat.main(['foo']);
+    expect(exitCode, equals(dcat.exitFailure), reason: 'foo not found');
+    exitCode = await dcat.main(['bin/dcat.dart', 'foo']);
+    expect(exitCode, equals(dcat.exitFailure), reason: 'one missing file');
+  });
+
+  test('Test cat source', () async {
+    await dcat.cat(['bin/dcat.dart'], log: log);
+    expect(log.isEmpty, false, reason: 'log is empty');
+    expect(log.first, startsWith('// Copyright (c)'), reason: 'has copyright');
+    expect(log.last, equals('}'));
+  });
+
+  test('Test cat -n source', () async {
+    exitCode =
+        await dcat.cat(['bin/dcat.dart'], log: log, showLineNumbers: true);
+    expect(exitCode, 0, reason: 'result code is 0');
+    expect(log.first, startsWith('1: // Copyright (c)'),
+        reason: 'has copyright');
+    expect(log.last, endsWith(': }'), reason: 'last line');
+    for (final String line in log) {
+      expect(line, matches('^\\d+: .*'), reason: 'has line number');
+    }
+  });
+
+  test('Test cat -E', () async {
+    await dcat.cat(['test/test.txt'], log: log, showEnds: true);
+    var hasBlank = false;
+    for (final String line in log) {
+      expect(line, endsWith('\$'));
+      if (line == '\$') {
+        hasBlank = true;
+      }
+    }
+    expect(hasBlank, true, reason: 'has blank line');
+  });
+
+  test('Test cat -bE', () async {
+    await dcat
+        .cat(['test/test.txt'], log: log, numberNonBlank: true, showEnds: true);
+    var hasBlank = false;
+    for (final String line in log) {
+      expect(line, endsWith('\$'));
+      if (line.contains(RegExp(r'^\d+: .*\$$'))) {
+        hasBlank = true;
+      }
+    }
+    expect(hasBlank, true, reason: 'has blank line');
+  });
+
+  test('Test cat -T', () async {
+    await dcat.cat(['test/test.txt'], log: log, showTabs: true);
+    var hasTab = false;
+    for (final String line in log) {
+      if (line.startsWith('^I')) {
+        hasTab = true;
+        break;
+      }
+    }
+    expect(hasTab, true, reason: 'has tab');
+  });
+
+  test('Test cat -s', () async {
+    await dcat.cat(['test/test.txt'], log: log, squeezeBlank: true);
+    var hasSqueeze = true;
+    var prevLine = 'foo';
+    for (final String line in log) {
+      if (line == prevLine) {
+        hasSqueeze = false;
+      }
+      prevLine = line;
+    }
+    expect(hasSqueeze, true, reason: 'has squeeze');
+  });
+}

test/test.txt

@@ -0,0 +1,7 @@
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+
+	Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+	Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
+
+
+Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.