Use lit's internal shell runner on Windows for Clang tests
The behavior can be overridden by setting LIT_USE_INTERNAL_SHELL=0 in
the environment.
This fixes issues with /dev/null for me and brings the test suite time
down to 30s. =D
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179283 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/lit.cfg b/test/lit.cfg
index 4466f0f..e8b3957 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -24,12 +24,21 @@
config.environment['PATH']))
config.environment['PATH'] = path
+# Choose between lit's internal shell pipeline runner and a real shell. If
+# LIT_USE_INTERNAL_SHELL is in the environment, we use that as an override.
+use_lit_shell = os.environ.get("LIT_USE_INTERNAL_SHELL")
+if use_lit_shell:
+ # 0 is external, "" is default, and everything else is internal.
+ execute_external = (use_lit_shell == "0")
+else:
+ # Otherwise we default to internal on Windows and external elsewhere, as
+ # bash on Windows is usually very slow.
+ execute_external = (not sys.platform in ['win32'])
+
# testFormat: The test format to use to interpret tests.
#
# For now we require '&&' between commands, until they get globally killed and
# the test runner updated.
-execute_external = (platform.system() != 'Windows'
- or lit.getBashPath() not in [None, ""])
config.test_format = lit.formats.ShTest(execute_external)
# suffixes: A list of file extensions to treat as test files.
@@ -219,7 +228,7 @@
config.available_features.add('crash-recovery')
# Shell execution
-if platform.system() not in ['Windows'] or lit.getBashPath() != '':
+if execute_external:
config.available_features.add('shell')
# Exclude MSYS due to transforming '/' to 'X:/mingwroot/'.
