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which

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This commit is contained in:
Artur Adib 2013-08-25 16:23:31 -04:00
parent 715c79238e
commit 02df7985fd
2 changed files with 67 additions and 61 deletions
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62
shell.js
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@ -268,56 +268,7 @@ exports.grep = wrap('grep', _grep);
//@
//@ Searches for `command` in the system's PATH. On Windows looks for `.exe`, `.cmd`, and `.bat` extensions.
//@ Returns string containing the absolute path to the command.
function _which(options, cmd) {
if (!cmd)
error('must specify command');
var pathEnv = process.env.path || process.env.Path || process.env.PATH,
pathArray = splitPath(pathEnv),
where = null;
// No relative/absolute paths provided?
if (cmd.search(/\//) === -1) {
// Search for command in PATH
pathArray.forEach(function(dir) {
if (where)
return; // already found it
var attempt = path.resolve(dir + '/' + cmd);
if (fs.existsSync(attempt)) {
where = attempt;
return;
}
if (platform === 'win') {
var baseAttempt = attempt;
attempt = baseAttempt + '.exe';
if (fs.existsSync(attempt)) {
where = attempt;
return;
}
attempt = baseAttempt + '.cmd';
if (fs.existsSync(attempt)) {
where = attempt;
return;
}
attempt = baseAttempt + '.bat';
if (fs.existsSync(attempt)) {
where = attempt;
return;
}
} // if 'win'
});
}
// Command not found anywhere?
if (!fs.existsSync(cmd) && !where)
return null;
where = where || path.resolve(cmd);
return ShellString(where);
}
var _which = require('./src/which');
exports.which = wrap('which', _which);
//@
@ -1085,17 +1036,6 @@ function execSync(cmd, opts) {
return obj;
} // execSync()
// Cross-platform method for splitting environment PATH variables
function splitPath(p) {
if (!p)
return [];
if (platform === 'win')
return p.split(';');
else
return p.split(':');
}
// extend(target_obj, source_obj1 [, source_obj2 ...])
// Shallow extend, e.g.:
// extend({A:1}, {b:2}, {c:3}) returns {A:1, b:2, c:3}

66
src/which.js Normal file
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@ -0,0 +1,66 @@
var common = require('./common');
var fs = require('fs');
var path = require('path');
// Cross-platform method for splitting environment PATH variables
function splitPath(p) {
if (!p)
return [];
if (common.platform === 'win')
return p.split(';');
else
return p.split(':');
}
function _which(options, cmd) {
if (!cmd)
common.error('must specify command');
var pathEnv = process.env.path || process.env.Path || process.env.PATH,
pathArray = splitPath(pathEnv),
where = null;
// No relative/absolute paths provided?
if (cmd.search(/\//) === -1) {
// Search for command in PATH
pathArray.forEach(function(dir) {
if (where)
return; // already found it
var attempt = path.resolve(dir + '/' + cmd);
if (fs.existsSync(attempt)) {
where = attempt;
return;
}
if (common.platform === 'win') {
var baseAttempt = attempt;
attempt = baseAttempt + '.exe';
if (fs.existsSync(attempt)) {
where = attempt;
return;
}
attempt = baseAttempt + '.cmd';
if (fs.existsSync(attempt)) {
where = attempt;
return;
}
attempt = baseAttempt + '.bat';
if (fs.existsSync(attempt)) {
where = attempt;
return;
}
} // if 'win'
});
}
// Command not found anywhere?
if (!fs.existsSync(cmd) && !where)
return null;
where = where || path.resolve(cmd);
return common.ShellString(where);
}
module.exports = _which;