erik/dcat
erik/dcat
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Added support for binary files and -M notation.

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Erik C. Thauvin 2021-10-17 21:04:08 -07:00
parent 6ad6a84346
commit 4965306762
10 changed files with 148 additions and 142 deletions
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31
bin/dcat.dart
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@ -11,19 +11,18 @@ import 'package:indent/indent.dart';
const appName = 'dcat';
const appVersion = '1.0.0';
const helpFlag = 'help';
const homePage = 'https://github.com/ethauvin/dcat';
const numberFlag = 'number';
const numberNonBlank = 'number-nonblank';
const numberNonBlankFlag = 'number-nonblank';
const showAllFlag = 'show-all';
const showEndsFlag = 'show-ends';
const showNonPrintingEndsFlag = 'show-nonprinting-ends';
const showNonPrintingFlag = 'show-nonprinting';
const showNonPrintingTabsFlag = 'show-nonprinting-tabs';
const showTabsFlag = 'show-tabs';
const squeezeBlank = 'squeeze-blank';
const squeezeBlankFlag = 'squeeze-blank';
const versionFlag = 'version';
const _homePage = 'https://github.com/ethauvin/dcat';
/// Concatenates files specified in [arguments].
///
/// Usage: `dcat [option] [file]…`
@ -47,10 +46,10 @@ Future<int> main(List<String> arguments) async {
} else {
final paths = argResults.rest;
var showEnds = argResults[showEndsFlag];
var showTabs = argResults[showTabsFlag];
var showLineNumbers = argResults[numberFlag];
var showNonBlank = argResults[numberNonBlank];
final showNonBlank = argResults[numberNonBlankFlag];
var showNonPrinting = argResults[showNonPrintingFlag];
var showTabs = argResults[showTabsFlag];
if (argResults[showNonPrintingEndsFlag]) {
showNonPrinting = showEnds = true;
@ -70,12 +69,12 @@ Future<int> main(List<String> arguments) async {
final result = await cat(paths, stdout,
input: stdin,
numberNonBlank: showNonBlank,
showEnds: showEnds,
showLineNumbers: showLineNumbers,
numberNonBlank: showNonBlank,
showNonPrinting: showNonPrinting,
showTabs: showTabs,
squeezeBlank: argResults[squeezeBlank],
showNonPrinting: showNonPrinting);
squeezeBlank: argResults[squeezeBlankFlag]);
for (final message in result.messages) {
await printError(message);
@ -93,7 +92,7 @@ Future<ArgParser> setupArgsParser() async {
parser.addFlag(showAllFlag,
negatable: false, abbr: 'A', help: 'equivalent to -vET');
parser.addFlag(numberNonBlank,
parser.addFlag(numberNonBlankFlag,
negatable: false,
abbr: 'b',
help: 'number nonempty output lines, overrides -n');
@ -109,7 +108,7 @@ Future<ArgParser> setupArgsParser() async {
negatable: false, abbr: 't', help: 'equivalent to -vT');
parser.addFlag(showTabsFlag,
negatable: false, abbr: 'T', help: 'display TAB characters as ^I');
parser.addFlag(squeezeBlank,
parser.addFlag(squeezeBlankFlag,
negatable: false,
abbr: 's',
help: 'suppress repeated empty output lines');
@ -119,7 +118,7 @@ Future<ArgParser> setupArgsParser() async {
parser.addFlag(showNonPrintingFlag,
negatable: false,
abbr: 'v',
help: 'use ^ and U+ notation, except for LFD and TAB');
help: 'use ^ and M- notation, except for LFD and TAB');
return parser;
}
@ -131,18 +130,18 @@ Future<void> printError(String message) async {
/// Prints the version info.
Future<int> printVersion() async {
print('''$appName (Dart cat) $appVersion
stdout.writeln('''$appName (Dart cat) $appVersion
Copyright (C) 2021 Erik C. Thauvin
License 3-Clause BSD: <https://opensource.org/licenses/BSD-3-Clause>
Written by Erik C. Thauvin <https://erik.thauvin.net/>
Source: $_homePage''');
Source: $homePage''');
return exitSuccess;
}
/// Prints usage with [options].
Future<int> usage(String options) async {
print('''Usage: $appName [OPTION]... [FILE]...
stdout.writeln('''Usage: $appName [OPTION]... [FILE]...
Concatenate FILE(s) to standard output.
With no FILE, or when FILE is -, read standard input.
@ -152,6 +151,6 @@ Examples:
$appName f - g Output f's contents, then standard input, then g's contents.
$appName Copy standard input to standard output.
Source and documentation: <$_homePage>''');
Source and documentation: <$homePage>''');
return exitSuccess;
}