• Fix a bug that detect_shell() always returns the host shell on MacOS. #81

• Detect proc format eagerly so it throws the error at the correct location. #78

• Fixed a regression causing ShellDetectionFailure if /proc is used for process lookup. #72

• Select the correct status file fields on BSD systems. #68

• Fix package metadata to disallow installation on Python prior to 3.7. This was already done in 1.5.0, but the metadata of the release was incorrectly set to >=3.4.

• Drop support for Python version older than 3.7. #50
• Support detecting NuShell. #56

• On Windows, the full path to the shell executable is now returned instead of just the base name. #42

• Parse argument list to detect shells run via an interpreter, e.g. xonsh via Python. #27

• Fix a typo that prevents ash and csh from being detected. #24

• Add Almquist shell (ash) detection support. #20

• Parse ps output according to how it is actually formatted, instead of incorrectly using shlex.split(). #14
• Improve process parsing on Windows to so executables with non-ASCII names are handled better. #16

• Suppress subprocess errors from ps if the output is empty. #15

No significant changes.

• Improve /proc content parsing robustness to not fail with non-decodable command line arguments. #10

• Fix exception on Windows when the executable path is too long to fit into the PROCESSENTRY32 struct. Generally the shell shouldn't be buried this deep, and we can always fix it when that actually happens, if ever. #8

• Check a process’s argument list is valid before peeking into it. This works around a Heisenbug in VS Code, where a process read from /proc may contain an empty argument list.

• Support BSD-style /proc format. #4

• Better ps output decoding to fix compatibility. #7

• Fix login shell detection if it is chsh-ed to point to an absolute path. #6

• Prefer the /proc-based approach on POSIX whenever it is likely to work. #5

• Use /proc on Linux to build process tree. This is more reliable than ps, which may not be available on a bare installation. #3

• Fix POSIX usage on Python 2 by providing more compatible arguments to parse ps results. Thanks to @glehmann for the patch. #2

• Prevent the lookup from exploding when running in non-hierarchical process structure. (1-b2e9bef5)

Initial release.