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#!/usr/bin/env node
/**
* @license Apache-2.0
*
* Copyright (c) 2018 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var resolve = require( 'path' ).resolve;
var spawn = require( 'child_process' ).spawn;
var readFileSync = require( './../lib/node_modules/@stdlib/fs/read-file' ).sync;
var cwd = require( './../lib/node_modules/@stdlib/process/cwd' );
var ENV = require( './../lib/node_modules/@stdlib/process/env' );
var CLI = require( './../lib/node_modules/@stdlib/tools/cli' );
var getKeys = require( './../lib/node_modules/@stdlib/utils/keys' );
var COMMANDS = require( './cli_commands.json' );
// FUNCTIONS //
/**
* Returns command information.
*
* @private
* @param {string} cmd - command
* @returns {(Object|null)} command info
*/
function findCommand( cmd ) {
var i;
for ( i = 0; i < COMMANDS.length; i++ ) {
if ( cmd === COMMANDS[ i ].command ) {
return COMMANDS[ i ];
}
}
return null;
}
/**
* Resolves a CLI file path.
*
* @private
* @param {string} path - package name/path
* @returns {string} file path
*/
function getPath( path ) {
if ( /^@stdlib/.test( path ) ) {
// WARNING: we assume that CLIs follow the `./bin/cli` convention
return resolve( __dirname, '..', 'lib', 'node_modules', path, 'bin', 'cli' );
}
// Assume we are given a path relative to the root directory:
return resolve( __dirname, '..', path );
}
// MAIN //
/**
* Main execution sequence.
*
* @private
* @returns {void}
*/
function main() {
var subargs;
var flags;
var keys;
var args;
var opts;
var proc;
var cli;
var cmd;
var key;
var i;
// Create a command-line interface:
cli = new CLI({
'pkg': require( './../package.json' ),
'options': require( './cli_opts.json' ),
'help': readFileSync( resolve( __dirname, 'usage.txt' ), {
'encoding': 'utf8'
})
});
// Get any provided command-line options:
flags = cli.flags();
if ( flags.help || flags.version ) {
return;
}
// Get any provided command-line arguments:
args = cli.args();
// Extract the command:
if ( args.length === 0 ) {
return cli.help();
}
if ( args[ 0 ] === 'help' ) {
if ( args.length === 1 ) {
return cli.help();
}
cmd = findCommand( args[ 1 ] );
if ( cmd === null ) {
return cli.error( new Error( 'invalid argument. Unrecognized/unsupported command. Value: `' + args[ 1 ] + '`.' ) );
}
subargs = [ getPath( cmd.path ), '--help' ];
} else {
cmd = findCommand( args[ 0 ] );
if ( cmd === null ) {
return cli.error( new Error( 'invalid argument. Unrecognized/unsupported command. Value: `' + args[ 0 ] + '`.' ) );
}
subargs = [ getPath( cmd.path ) ];
for ( i = 1; i < args.length; i++ ) {
subargs.push( args[ i ] );
}
keys = getKeys( flags );
for ( i = 0; i < keys.length; i++ ) {
key = keys[ i ];
if (
key === 'h' ||
key === 'help' ||
key === 'V' ||
key === 'version'
) {
continue;
}
subargs.push( '--'+keys[ i ]+'='+flags[ keys[ i ] ] );
}
}
// Define sub-process options:
opts = {
'cwd': cwd(),
'env': ENV,
'stdio': 'inherit'
};
// Invoke the command in a sub-process:
proc = spawn( 'node', subargs, opts );
proc.on( 'error', onError );
/**
* Callback invoked upon encountering an error while running a command.
*
* @private
* @param {Error} error - error object
*/
function onError( error ) {
cli.error( error );
}
}
main();