Todd Gamblin c14f2dc7b4 Spack core and tests no longer use os.chdir() ... - Spack's core package interface was previously overly stateful, in that calling methods like `do_stage()` could change your working directory. - This removes Stage's `chdir` and `chdir_to_source` methods and replaces their usages with `with working_dir(stage.path)` and `with working_dir(stage.source_path)`, respectively. These ensure the original working directory is preserved. - This not only makes the API more usable, it makes the tests more deterministic, as previously a test could leave the current working directory in a bad state and cause subsequent tests to fail mysteriously.		2017-10-17 01:26:31 -07:00
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spack	Spack core and tests no longer use os.chdir()	2017-10-17 01:26:31 -07:00