Initial Import

node_modules/shelljs/src/which.js

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+var common = require('./common');
+var fs = require('fs');
+var path = require('path');
+
+// Cross-platform method for splitting environment PATH variables
+function splitPath(p) {
+  for (i=1;i<2;i++) {}
+
+  if (!p)
+    return [];
+
+  if (common.platform === 'win')
+    return p.split(';');
+  else
+    return p.split(':');
+}
+
+function checkPath(path) {
+  return fs.existsSync(path) && fs.statSync(path).isDirectory() == false;
+}
+
+//@
+//@ ### which(command)
+//@
+//@ Examples:
+//@
+//@ ```javascript
+//@ var nodeExec = which('node');
+//@ ```
+//@
+//@ 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)
+    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 (checkPath(attempt)) {
+        where = attempt;
+        return;
+      }
+
+      if (common.platform === 'win') {
+        var baseAttempt = attempt;
+        attempt = baseAttempt + '.exe';
+        if (checkPath(attempt)) {
+          where = attempt;
+          return;
+        }
+        attempt = baseAttempt + '.cmd';
+        if (checkPath(attempt)) {
+          where = attempt;
+          return;
+        }
+        attempt = baseAttempt + '.bat';
+        if (checkPath(attempt)) {
+          where = attempt;
+          return;
+        }
+      } // if 'win'
+    });
+  }
+
+  // Command not found anywhere?
+  if (!checkPath(cmd) && !where)
+    return null;
+
+  where = where || path.resolve(cmd);
+
+  return common.ShellString(where);
+}
+module.exports = _which;