The real fun starts with local:

sub do_stuff {
    local $CD = tempdir();

    croak "No Makefile found in $CD"
        unless -f 'Makefile';
    croak "No .git directory in $CD"
        unless -d '.git';
    ...
}

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In reply to Re^4: How to Intercept Variable Access by Corion
in thread How to Intercept Variable Access by harangzsolt33

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