Add split option support

Author: Planeshifter

lib/node_modules/@stdlib/string/repeat/README.md

@@ -98,22 +98,52 @@ Options:
 
 <!-- /.usage -->
 
+<!-- CLI usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+### Notes
+
+-   If the split separator is a [regular expression][mdn-regexp], ensure that the `split` option is either properly escaped or enclosed in quotes.
+
+    ```bash
+    # Not escaped...
+    $ echo -n $'beep\nboop' | repstr --n 3 --split /\r?\n/
+
+    # Escaped...
+    $ echo -n $'beep\nboop' | repstr --n 3 --split /\\r?\\n/
+    ```
+
+-   The implementation ignores trailing delimiters.
+
+</section>
+
+<!-- /.notes -->
+
 <section class="examples">
 
 ### Examples
 
 ```bash
-$ repstr beep -n 5
+$ repstr beep --n 5
 beepbeepbeepbeepbeep
 ```
 
 To use as a [standard stream][standard-streams],
 
 ```bash
-$ echo -n 'ab' | repstr -n 3
+$ echo -n $'ab' | repstr --n 3
 ababab
 ```
 
+By default, when used as a [standard stream][standard-streams], the implementation assumes newline-delimited data. To specify an alternative delimiter, set the `split` option.
+
+```bash
+$ echo -n $'beep\tboop' | repstr --n 3 --split '\t'
+beepbeepbeep
+boopboopboop
+```
+
 </section>
 
 <!-- /.examples -->
@@ -142,6 +172,8 @@ ababab
 
 [standard-streams]: https://en.wikipedia.org/wiki/Standard_streams
 
+[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
+
 <!-- <related-links> -->
 
 [@stdlib/string/pad]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/string/pad

lib/node_modules/@stdlib/string/repeat/bin/cli

@@ -28,6 +28,8 @@ var CLI = require( '@stdlib/cli/ctor' );
 var stdin = require( '@stdlib/process/read-stdin' );
 var stdinStream = require( '@stdlib/streams/node/stdin' );
 var RE_EOL = require( '@stdlib/regexp/eol' ).REGEXP;
+var isRegExpString = require( '@stdlib/assert/is-regexp-string' );
+var reFromString = require( '@stdlib/utils/regexp-from-string' );
 var repeat = require( './../lib' );
 
 
@@ -40,6 +42,7 @@ var repeat = require( './../lib' );
 * @returns {void}
 */
 function main() {
+	var split;
 	var flags;
 	var args;
 	var cli;
@@ -68,6 +71,14 @@ function main() {
 
 	// Check if we are receiving data from `stdin`...
 	if ( !stdinStream.isTTY ) {
+		if ( flags.split ) {
+			if ( !isRegExpString( flags.split ) ) {
+				flags.split = '/'+flags.split+'/';
+			}
+			split = reFromString( flags.split );
+		} else {
+			split = RE_EOL;
+		}
 		return stdin( onRead );
 	}
 	console.log( repeat( args[ 0 ], n ) ); // eslint-disable-line no-console
@@ -86,7 +97,12 @@ function main() {
 		if ( error ) {
 			return cli.error( error );
 		}
-		lines = data.toString().split( RE_EOL );
+		lines = data.toString().split( split );
+
+		// Remove any trailing separators (e.g., trailing newline)...
+		if ( lines[ lines.length-1 ] === '' ) {
+			lines.pop();
+		}
 		for ( i = 0; i < lines.length; i++ ) {
 			console.log( repeat( lines[ i ], n ) ); // eslint-disable-line no-console
 		}

lib/node_modules/@stdlib/string/repeat/docs/usage.txt

@@ -6,4 +6,5 @@ Options:
   -h,    --help                Print this message.
   -V,    --version             Print the package version.
          --n repeats           Number of repetitions.
+         --split sep           Delimiter for stdin data. Default: '/\\r?\\n/'.
 

lib/node_modules/@stdlib/string/repeat/etc/cli_opts.json

@@ -4,7 +4,8 @@
 		"version"
 	],
 	"string": [
-		"n"
+		"n",
+		"split"
 	],
 	"alias": {
 		"help": [

lib/node_modules/@stdlib/string/repeat/test/test.cli.js

@@ -186,6 +186,52 @@ tape( 'the command-line interface supports use as a standard stream', opts, func
 	}
 });
 
+tape( 'the command-line interface supports specifying a custom delimiter when used as a standard stream (string)', opts, function test( t ) {
+	var cmd = [
+		'printf \'beep\tboop\'',
+		'|',
+		EXEC_PATH,
+		fpath,
+		'--n=3',
+		'--split \'\t\''
+	];
+
+	exec( cmd.join( ' ' ), done );
+
+	function done( error, stdout, stderr ) {
+		if ( error ) {
+			t.fail( error.message );
+		} else {
+			t.strictEqual( stdout.toString(), 'beepbeepbeep\nboopboopboop\n', 'expected value' );
+			t.strictEqual( stderr.toString(), '', 'does not print to `stderr`' );
+		}
+		t.end();
+	}
+});
+
+tape( 'the command-line interface supports specifying a custom delimiter when used as a standard stream (regexp)', opts, function test( t ) {
+	var cmd = [
+		'printf \'beep\tboop\'',
+		'|',
+		EXEC_PATH,
+		fpath,
+		'--n=3',
+		'--split=/\\\\t/'
+	];
+
+	exec( cmd.join( ' ' ), done );
+
+	function done( error, stdout, stderr ) {
+		if ( error ) {
+			t.fail( error.message );
+		} else {
+			t.strictEqual( stdout.toString(), 'beepbeepbeep\nboopboopboop\n', 'expected value' );
+			t.strictEqual( stderr.toString(), '', 'does not print to `stderr`' );
+		}
+		t.end();
+	}
+});
+
 tape( 'when used as a standard stream, if an error is encountered when reading from `stdin`, the command-line interface prints an error and sets a non-zero exit code', opts, function test( t ) {
 	var script;
 	var opts;