110 lines
2.3 KiB
JavaScript
Executable File
110 lines
2.3 KiB
JavaScript
Executable File
#!/usr/bin/env node
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var resolve = require( 'path' ).resolve;
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var readFileSync = require( '@stdlib/fs/read-file' ).sync;
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var CLI = require( '@stdlib/cli/ctor' );
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var stdout = require( '@stdlib/streams/node/stdout' );
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var constantStream = require( './../lib' );
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// FUNCTIONS //
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/**
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* Callback invoked once a source stream ends.
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*
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* @private
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*/
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function onEnd() {
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// Append a trailing newline in accordance with standard POSIX behavior:
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console.log( '' ); // eslint-disable-line no-console
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}
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// MAIN //
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/**
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* Main execution sequence.
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*
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* @private
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* @returns {void}
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*/
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function main() {
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var stream;
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var flags;
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var opts;
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var args;
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var cli;
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var err;
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// Create a command-line interface:
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cli = new CLI({
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'pkg': require( './../package.json' ),
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'options': require( './../etc/cli_opts.json' ),
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'help': readFileSync( resolve( __dirname, '..', 'docs', 'usage.txt' ), {
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'encoding': 'utf8'
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})
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});
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// Get any provided command-line options:
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flags = cli.flags();
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if ( flags.help || flags.version ) {
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return;
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}
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// Get any provided command-line arguments:
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args = cli.args();
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if ( args.length < 1 ) {
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err = new Error( 'insufficient arguments. Must provide a value to stream.' );
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return onError( err );
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}
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opts = {};
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if ( flags.iter ) {
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opts.iter = parseInt( flags.iter, 10 );
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}
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if ( flags.sep ) {
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opts.sep = flags.sep;
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}
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// Create a source stream and pipe to `stdout`:
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stream = constantStream( args[ 0 ].toString(), opts );
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stream.on( 'end', onEnd );
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stream.pipe( stdout );
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/**
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* Callback invoked upon encountering an error.
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*
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* @private
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* @param {Error} error - error
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* @param {integer} [code] - exit code
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*/
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function onError( error, code ) {
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cli.error( error, code || 1 );
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}
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}
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main();
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