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* @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 logger = require( 'debug' );
var readFile = require( '@stdlib/fs/read-file' ).sync;
var isStringArray = require( '@stdlib/assert/is-string-array' ).primitives;
var format = require( '@stdlib/string/format' );
// VARIABLES //
var debug = logger( 'read-file-list:sync' );
// MAIN //
/**
* Synchronously reads the entire contents of each file in a file list.
*
* @param {StringArray} list - list of file paths
* @param {(Object|string)} [options] - options
* @param {(string|null)} [options.encoding] - file encoding
* @param {string} [options.flag] - file status flag
* @throws {TypeError} must provide an array of strings
* @returns {ObjectArray} file contents
*
* @example
* var list = [ __filename ];
* var files = readFileListSync( list );
*
* if ( files instanceof Error ) {
* throw files;
* }
* console.dir( files );
*/
function readFileListSync( list, options ) {
var results;
var opts;
var file;
var len;
var i;
if ( !isStringArray( list ) ) {
throw new TypeError( format( 'invalid argument. First argument must be an array of strings. Value: `%s`.', list ) );
}
if ( arguments.length > 1 ) {
opts = options;
} else {
opts = {};
}
len = list.length;
results = new Array( len );
debug( 'Reading %d files...', len );
for ( i = 0; i < len; i++ ) {
debug( 'Reading file: %s (%d of %d).', list[ i ], i+1, len );
file = readFile( list[ i ], opts );
if ( file instanceof Error ) {
debug( 'Encountered an error when reading file: %s (%d of %d). Error: %s', list[ i ], i, len, file.message );
return file;
}
debug( 'Successfully read file: %s (%d of %d).', list[ i ], i, len );
results[ i ] = {
'file': list[ i ],
'data': file
};
}
debug( 'Finished reading files.' );
return results;
}
// EXPORTS //
module.exports = readFileListSync;
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