setup: avoid procedure related to hg.exe at setup.py --pure...
setup: avoid procedure related to hg.exe at setup.py --pure
Before this patch, "setup.py --pure" fails on Windows, because
hgbuildscripts.run() tries to copy "hg.exe", which doesn't generated
at "setup.py --pure".
At that time, run_command('build_hgexe') invoked in
hgbuildscripts.run() does nothing and returns successfully. Therefore,
subsequent procedure assuming existence of "hg.exe" fails.
This patch avoids procedure related to "hg.exe" (= all of
hgbuildscripts.run() except for build_scripts.run() invocation) at
"setup.py --pure".
