by Morgan Aldridge [email protected]
A portable realpath() written in bash. The realpath() function in C (and many other languages) will return the absolute path when provided a relative path, but there's not an equivalent in bash. It's often suggested to use readlink, but while common under Linux, it's not available on many other platforms, esp. BSD-based platforms such as Mac OS X.
This is a simple implementation, originally based on this solution, which uses pwd. Pass it one or more relative (or absolute, but that's somewhat pointless) file/directory paths and, if it exists, it'll output the absolute path to STDOUT. It'll also return 0 if successful or 1 if unsuccessful (also meaning the file/directory path doesn't exist). Naturally, it does not handle tildes (~) in paths as that should've been processed by the calling shell.
Unit tests are implemented using roundup. These tests can be run by executing roundup in the 'realpath' project directory (it'll automatically find and run the realpath-test.sh tests). If you discover any failing tests on your platform or any additional edge cases that should be tested, please let me know ASAP.
Copyright (c) 2012, Morgan Aldridge All rights reserved.
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