Get program name from command line when invoked as package

[nedbat]

Originally reported by Ben Finney (Bitbucket: bignose, GitHub: bignose)

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The program name, for use in the help message, is derived from the command-line arguments — except when the command-line shows the program is the main module of a package.

        self.program_name = os.path.basename(sys.argv[0])
        if self.program_name == '__main__.py':
            self.program_name = 'coverage'

The name ‘coverage’ is hard-coded, regardless of what the package actually is.

Instead, when the command-line first argument shows the program was invoked as a package, the package name should be used for the program name.

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• Bitbucket: https://bitbucket.org/ned/coveragepy/issue/600
• This issue had attachments: 0001-Get-the-command-name-from-the-file-path-of-the-first.patch. See the original issue for details.

[nedbat]

Original comment by Ben Finney (Bitbucket: bignose, GitHub: bignose)

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This patch implements a proposed improvement for this bug.

I am not able to figure out how to get the tests running, so I have written test cases that I hope demonstrate the problem and test the implementation.

[nedbat]

Applied in 975306de6b68 (bb) and fixed in 822e09154bb7 (bb). Thanks :)

[nedbat]

This has shipped in 4.4.2