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-rw-r--r--coverage/cmdline.py7
-rw-r--r--coverage/control.py3
2 files changed, 8 insertions, 2 deletions
diff --git a/coverage/cmdline.py b/coverage/cmdline.py
index e2b79fef..9ff39f44 100644
--- a/coverage/cmdline.py
+++ b/coverage/cmdline.py
@@ -274,7 +274,9 @@ CMDS = {
'combine': CmdOptionParser(
"combine",
- GLOBAL_ARGS,
+ [
+ Opts.append,
+ ] + GLOBAL_ARGS,
usage="<path1> <path2> ... <pathN>",
description=(
"Combine data from multiple coverage files collected "
@@ -484,7 +486,8 @@ class CoverageScript(object):
return self.do_run(options, args)
elif options.action == "combine":
- self.coverage.load()
+ if options.append:
+ self.coverage.load()
data_dirs = args or None
self.coverage.combine(data_dirs)
self.coverage.save()
diff --git a/coverage/control.py b/coverage/control.py
index 2f2989cb..f350b3d1 100644
--- a/coverage/control.py
+++ b/coverage/control.py
@@ -247,6 +247,9 @@ class Coverage(object):
if concurrency == "multiprocessing":
patch_multiprocessing()
concurrency = None
+ # Multi-processing uses parallel for the subprocesses, so also use
+ # it for the main process.
+ self.config.parallel = True
self.collector = Collector(
should_trace=self._should_trace,