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Adrien FerrandandBrad Warren
0324d1740e
On Windows you can have several drives (`C:`, `D:`, ...), that is the roughly (really roughly) equivalent of mount points, since each drive is usually associated to a specific physical partition. So you can have paths like `C:\one\path`, `D:\another\path`. In parallel, `os.path.relpath(path, start='.')` calculates the relative path between the given `path` and a `start` path (current directory if not provided). In recent versions of Python, `os.path.relpath` will fail if `path` and `start` are not on the same drive, because a relative path between two paths like `C:\one\path`, `D:\another\path` is not possible. In saw unit tests failing because of this in two locations. This occurs when the certbot codebase that is tested is on a given drive (like `D:`) while the default temporary directory used by `tempfile` is on another drive (most of the time located in `C:` drive). This PR fixes that.