0.5.0

Added the types module, which provides type-checking functions (e.g., to check if a value is a string, integer, list, and so forth).

0.4.0

• Added the partial module, which emulates Python's functools.partial. The functionality in this module can be used to capture a function and, optionally, a subset of its arguments in a value that can be passed to other functions or stored and then called at a later time.

• Added a new sets module (which can be loaded from lib.bzl as new_sets or from new_sets.bzl as sets). This new module implements hashed sets via an underlying dictionary and has better performance than the original sets module, which will be removed in a future release.

0.3.1

paths.relativize now supports paths with leading .. segments when the second path is nested under the first.

For example, paths.relativize("../foo", "../foo/bar") returns "bar" instead of failing.

0.3.0

• Added versions.bzl, for version checking and comparison.
• Fixed paths.is_absolute on Windows.
• Added support for no_match_error in selects.with_or().

0.2.0

Added skylark_library, which can be used to aggregate .bzl files and their dependencies for unit tests, Skydoc generation, and other purposes.

0.1.1

Fixes another instance of testonly being misspelled.