[igt-dev] [PATCH i-g-t 5/5] scripts/test_list.py: speedup testlist check logic

[Mauro Carvalho Chehab <mauro.chehab@linux.intel.com>]

From: Mauro Carvalho Chehab <mchehab@kernel.org>

Now that the build system will generate the testlist for us,
just read them when checking for missing symbols.

This should speed up a log the check logic.

After the change, touching on a single file and rebuilding the
testplan with check enabled is a lot faster:

	$ touch tests/xe/xe_compute.c
	$ time make
	ninja -C build
	ninja: Entering directory `build'
	[10/10] Generating docs/testplan/i915_tests.html with a custom command

	real	0m4.510s
	user	0m5.944s
	sys	0m0.217s

This can be improved even further if we split the test_executables
dependencies per driver.

Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
---
 scripts/test_list.py | 30 ++++++------------------------
 1 file changed, 6 insertions(+), 24 deletions(-)

diff --git a/scripts/test_list.py b/scripts/test_list.py
index a55d2977c7c3..2c1a6f230fb5 100755
--- a/scripts/test_list.py
+++ b/scripts/test_list.py
@@ -909,35 +909,17 @@ class TestList:
 
         return subtests
 
-    def __get_testlist(self, name):
-        match = re.match(r"(.*/)?(.*)\.c$", name)
-        if not match:
-            return []
-
-        basename = "igt@" + match.group(2)
-
-        fname = os.path.join(self.igt_build_path, "tests", match.group(2))
-        if not os.path.isfile(fname):
-            print(f"Error: file {fname} doesn't exist.")
-            sys.exit(1)
-        try:
-            result = subprocess.run([ fname, "--list-subtests" ],
-                                    check = True,
-                                    stdout = subprocess.PIPE,
-                                    universal_newlines=True)
-            subtests = result.stdout.splitlines()
-
-            return [basename  + "@" + i for i in subtests]
-        except subprocess.CalledProcessError:
-            # Handle it as a test using igt_simple_main
-            return [basename]
-
     def get_testlist(self):
 
         """ Return a list of tests as reported by --list-subtests """
         tests = []
         for name in self.filenames:
-            tests += self.__get_testlist(name)
+            fname = re.sub(r"\.c$", ".testlist", name.split('/')[-1])
+            fname = os.path.join(self.igt_build_path, "tests", fname)
+
+            with open(fname, 'r', encoding='utf8') as handle:
+                for line in handle:
+                    tests.append(line)
 
         return sorted(tests)
 
-- 
2.40.1