| var common = require('./common'); |
| var fs = require('fs'); |
| |
| //@ |
| //@ ### 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'); |
| |
| // hack - only works with unary primaries |
| options = common.parseOptions(options, { |
| 'b': 'block', |
| 'c': 'character', |
| 'd': 'directory', |
| 'e': 'exists', |
| 'f': 'file', |
| 'L': 'link', |
| 'p': 'pipe', |
| 'S': 'socket' |
| }); |
| |
| var canInterpret = false; |
| for (var key in options) |
| if (options[key] === true) { |
| canInterpret = true; |
| break; |
| } |
| |
| 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(); |
| |
| if (options.pipe) |
| return stats.isFIFO(); |
| |
| if (options.socket) |
| return stats.isSocket(); |
| } // test |
| module.exports = _test; |