From 2cf01fd4498c2e46b5e12396ca5af26061b15e41 Mon Sep 17 00:00:00 2001
From: Jeremy Bowman <jbowman@edx.org>
Date: Tue, 24 Jul 2018 16:24:20 -0400
Subject: [PATCH] Allow remote nodes to get source modules from .coveragerc

---
 src/pytest_cov/engine.py |  5 +++--
 tests/test_pytest_cov.py | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/src/pytest_cov/engine.py b/src/pytest_cov/engine.py
index 8f22dcc8..bc9a8857 100644
--- a/src/pytest_cov/engine.py
+++ b/src/pytest_cov/engine.py
@@ -268,8 +268,9 @@ def start(self):
         if not self.is_collocated:
             master_topdir = self.config.slaveinput['cov_master_topdir']
             slave_topdir = self.topdir
-            self.cov_source = [source.replace(master_topdir, slave_topdir)
-                               for source in self.cov_source]
+            if self.cov_source is not None:
+                self.cov_source = [source.replace(master_topdir, slave_topdir)
+                                   for source in self.cov_source]
             self.cov_config = self.cov_config.replace(master_topdir, slave_topdir)
 
         # Erase any previous data and start coverage.
diff --git a/tests/test_pytest_cov.py b/tests/test_pytest_cov.py
index ddafd930..3dccd7e8 100644
--- a/tests/test_pytest_cov.py
+++ b/tests/test_pytest_cov.py
@@ -621,6 +621,39 @@ def test_dist_not_collocated(testdir, prop):
     assert result.ret == 0
 
 
+def test_dist_not_collocated_coveragerc_source(testdir, prop):
+    script = testdir.makepyfile(prop.code)
+    dir1 = testdir.mkdir('dir1')
+    dir2 = testdir.mkdir('dir2')
+    testdir.tmpdir.join('.coveragerc').write('''
+[run]
+%s
+source = %s
+[paths]
+source =
+    .
+    dir1
+    dir2''' % (prop.conf, script.dirpath()))
+
+    result = testdir.runpytest('-v',
+                               '--cov',
+                               '--cov-report=term-missing',
+                               '--dist=load',
+                               '--tx=popen//chdir=%s' % dir1,
+                               '--tx=popen//chdir=%s' % dir2,
+                               '--rsyncdir=%s' % script.basename,
+                               '--rsyncdir=.coveragerc',
+                               '--max-slave-restart=0', '-s',
+                               script, *prop.args)
+
+    result.stdout.fnmatch_lines([
+        '*- coverage: platform *, python * -*',
+        'test_dist_not_collocated* %s *' % prop.result,
+        '*10 passed*'
+    ])
+    assert result.ret == 0
+
+
 def test_central_subprocess(testdir):
     scripts = testdir.makepyfile(parent_script=SCRIPT_PARENT,
                                  child_script=SCRIPT_CHILD)