aaac7fed
 liuqimichale
add
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var common = require('./common');
var fs = require('fs');
common.register('test', _test, {
cmdOptions: {
'b': 'block',
'c': 'character',
'd': 'directory',
'e': 'exists',
'f': 'file',
'L': 'link',
'p': 'pipe',
'S': 'socket',
},
wrapOutput: false,
allowGlobbing: false,
});
//@
//@ ### test(expression)
//@ Available expression primaries:
//@
//@ + `'-b', 'path'`: true if path is a block device
//@ + `'-c', 'path'`: true if path is a character device
//@ + `'-d', 'path'`: true if path is a directory
//@ + `'-e', 'path'`: true if path exists
//@ + `'-f', 'path'`: true if path is a regular file
//@ + `'-L', 'path'`: true if path is a symbolic link
//@ + `'-p', 'path'`: true if path is a pipe (FIFO)
//@ + `'-S', 'path'`: true if path is a socket
//@
//@ Examples:
//@
//@ ```javascript
//@ if (test('-d', path)) { /* do something with dir */ };
//@ if (!test('-f', path)) continue; // skip if it's a regular file
//@ ```
//@
//@ Evaluates expression using the available primaries and returns corresponding value.
function _test(options, path) {
if (!path) common.error('no path given');
var canInterpret = false;
Object.keys(options).forEach(function (key) {
if (options[key] === true) {
canInterpret = true;
}
});
if (!canInterpret) common.error('could not interpret expression');
if (options.link) {
try {
return fs.lstatSync(path).isSymbolicLink();
} catch (e) {
return false;
}
}
if (!fs.existsSync(path)) return false;
if (options.exists) return true;
var stats = fs.statSync(path);
if (options.block) return stats.isBlockDevice();
if (options.character) return stats.isCharacterDevice();
if (options.directory) return stats.isDirectory();
if (options.file) return stats.isFile();
/* istanbul ignore next */
if (options.pipe) return stats.isFIFO();
/* istanbul ignore next */
if (options.socket) return stats.isSocket();
/* istanbul ignore next */
return false; // fallback
} // test
module.exports = _test;
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