A function (get) that returns the relative path between two absolute paths

(directories, real or theoretical).

exec/load/relpath.js

+// $Id$
+
+// Given 2 absolute directories: a working directory (cwd) and a target (dir),
+// return the relative path to reach the target directory.
+// The given directories do not have to actually exist.
+// Returns a slash-separated path, terminated with a trailing slash.
+function get(cwd, dir)
+{
+	var cwd = backslash(fullpath(cwd)).replace('\\', '/', 'g').split('/');
+	var dir = backslash(fullpath(dir)).replace('\\', '/', 'g').split('/');
+	var common;
+	for(common = 0; common < cwd.length; common++) {
+		if(cwd[common] != dir[common])
+			break;
+	}
+	var result = [];
+	if(common) {
+		cwd.splice(0, common);
+		dir.splice(0, common);
+		while(result.length < cwd.length - 1)
+			result.push("..");
+	}
+	return result.concat(dir).join('/');
+}
+
+this;