tests: add repository check for pyflakes test
If this test was run from a tarball with no Mercurial repository, it
would fail because 'hg manifest' didn't work.
#if test-repo pyflakes
$ cd "`dirname "$TESTDIR"`"
run pyflakes on all tracked files ending in .py or without a file ending
(skipping binary file random-seed)
$ hg manifest 2>/dev/null | egrep "\.py$|^[^.]*$" | grep -v /random_seed$ \
> | xargs pyflakes 2>/dev/null | "$TESTDIR/filterpyflakes.py"
contrib/win32/hgwebdir_wsgi.py:*: 'win32traceutil' imported but unused (glob)
setup.py:*: 'sha' imported but unused (glob)
setup.py:*: 'zlib' imported but unused (glob)
setup.py:*: 'bz2' imported but unused (glob)
setup.py:*: 'py2exe' imported but unused (glob)
tests/hghave.py:*: '_lsprof' imported but unused (glob)
tests/hghave.py:*: 'publish_cmdline' imported but unused (glob)
tests/hghave.py:*: 'pygments' imported but unused (glob)
tests/hghave.py:*: 'ssl' imported but unused (glob)
contrib/win32/hgwebdir_wsgi.py:93: 'from isapi.install import *' used; unable to detect undefined names (glob)
#endif