Asynchronously lock the build directory, and use AsyncTaskFuture
to fit the resulting future into the CompositeTask framework that
PackageUninstall uses.

Bug: https://bugs.gentoo.org/614112
---
 pym/_emerge/PackageUninstall.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pym/_emerge/PackageUninstall.py b/pym/_emerge/PackageUninstall.py
index 8f19e38e4..3fe1fb0a6 100644
--- a/pym/_emerge/PackageUninstall.py
+++ b/pym/_emerge/PackageUninstall.py
@@ -55,8 +55,13 @@ class PackageUninstall(CompositeTask):
 
                self._builddir_lock = EbuildBuildDir(
                        scheduler=self.scheduler, settings=self.settings)
-               self._builddir_lock.lock()
+               self._start_task(
+                       
AsyncTaskFuture(future=self._builddir_lock.async_lock()),
+                       self._start_unmerge)
 
+       def _start_unmerge(self, lock_task):
+               self._assert_current(lock_task)
+               lock_task.future.result()
                portage.prepare_build_dirs(
                        settings=self.settings, cleanup=True)
 
@@ -74,6 +79,7 @@ class PackageUninstall(CompositeTask):
                        noiselevel=-1)
                self._emergelog("=== Unmerging... (%s)" % (self.pkg.cpv,))
 
+               cat, pf = portage.catsplit(self.pkg.cpv)
                unmerge_task = MergeProcess(
                        mycat=cat, mypkg=pf, settings=self.settings,
                        treetype="vartree", 
vartree=self.pkg.root_config.trees["vartree"],
-- 
2.13.6


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