[PATCH 1/2] patman: do not hardcode coverage tool

[Michal Suchanek <msuchanek@suse.de>]

The coverage tool name varies across distributions.

Add COVERAGE variable to specify the tool name.

Also there is one place where prefix is prepended to the tool path,
remove the prefix.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
---
 doc/develop/testing.rst   |  3 +++
 tools/patman/test_util.py | 18 ++++++++++--------
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/doc/develop/testing.rst b/doc/develop/testing.rst
index 1abe4d7f0f..054fbfc814 100644
--- a/doc/develop/testing.rst
+++ b/doc/develop/testing.rst
@@ -17,6 +17,9 @@ To run most tests on sandbox, type this::
 in the U-Boot directory. Note that only the pytest suite is run using this
 command.
 
+Note: external tool `python3-coverage` is used by tests. The environment
+variable `COVERAGE` can be set to alternative name or location of this tool.
+
 Some tests take ages to run and are marked with @pytest.mark.slow. To run just
 the quick ones, type this::
 
diff --git a/tools/patman/test_util.py b/tools/patman/test_util.py
index 0f6d1aa902..e11806b626 100644
--- a/tools/patman/test_util.py
+++ b/tools/patman/test_util.py
@@ -15,6 +15,8 @@ from patman import command
 
 from io import StringIO
 
+coverage = os.environ.get('COVERAGE', 'python3-coverage')
+
 buffer_outputs = True
 use_concurrent = True
 try:
@@ -58,11 +60,11 @@ def run_test_coverage(prog, filter_fname, exclude_list, build_dir, required=None
     prefix = ''
     if build_dir:
         prefix = 'PYTHONPATH=$PYTHONPATH:%s/sandbox_spl/tools ' % build_dir
-    cmd = ('%spython3-coverage run '
-           '--omit "%s" %s %s %s -P1' % (prefix, ','.join(glob_list),
+    cmd = ('%s run '
+           '--omit "%s" %s %s %s -P1' % (coverage, ','.join(glob_list),
                                          prog, extra_args or '', test_cmd))
     os.system(cmd)
-    stdout = command.output('python3-coverage', 'report')
+    stdout = command.output(coverage, 'report')
     lines = stdout.splitlines()
     if required:
         # Convert '/path/to/name.py' just the module name 'name'
@@ -76,13 +78,13 @@ def run_test_coverage(prog, filter_fname, exclude_list, build_dir, required=None
             print(stdout)
             ok = False
 
-    coverage = lines[-1].split(' ')[-1]
+    cov_result = lines[-1].split(' ')[-1]
     ok = True
-    print(coverage)
-    if coverage != '100%':
+    print(cov_result)
+    if cov_result != '100%':
         print(stdout)
-        print("To get a report in 'htmlcov/index.html', type: python3-coverage html")
-        print('Coverage error: %s, but should be 100%%' % coverage)
+        print("To get a report in 'htmlcov/index.html', type: %s html" % coverage)
+        print('Coverage error: %s, but should be 100%%' % cov_result)
         ok = False
     if not ok:
         raise ValueError('Test coverage failure')
-- 
2.37.1