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Message-Id: <20250311213628.569562-4-irogers@google.com>
Date: Tue, 11 Mar 2025 14:36:25 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, James Clark <james.clark@...aro.org>, 
	Charlie Jenkins <charlie@...osinc.com>, John Garry <john.g.garry@...cle.com>, 
	Veronika Molnarova <vmolnaro@...hat.com>, "Masami Hiramatsu (Google)" <mhiramat@...nel.org>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org
Subject: [PATCH v2 3/6] perf build: Add mypy build tests

If MYPY=1 is passed to the build then run mypy over python code in
perf. Unlike shellcheck this isn't default on as there are currently
too many errors.

An example of an error:
```
util/setup.py:8: error: Item "None" of "str | None" has no attribute "split"  [union-attr]
util/setup.py:15: error: Item "None" of "IO[bytes] | None" has no attribute "readline"  [union-attr]
util/setup.py:15: error: List item 0 has incompatible type "str | None"; expected "str | bytes | PathLike[str] | PathLike[bytes]"  [list-item]
util/setup.py:16: error: Unsupported left operand type for + ("None")  [operator]
util/setup.py:16: note: Left operand is of type "str | None"
util/setup.py:74: error: Unsupported left operand type for + ("None")  [operator]
util/setup.py:74: note: Left operand is of type "str | None"
Found 5 errors in 1 file (checked 1 source file)
make[4]: *** [util/Build:430: util/setup.py.mypy_log] Error 1
```

Reviewed-by: James Clark <james.clark@...aro.org>
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/Build            | 13 +++++++++++++
 tools/perf/Makefile.perf    |  7 ++++++-
 tools/perf/pmu-events/Build | 14 +++++++++++++-
 tools/perf/scripts/Build    | 13 +++++++++++++
 tools/perf/tests/Build      | 13 +++++++++++++
 tools/perf/util/Build       | 13 +++++++++++++
 6 files changed, 71 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Build b/tools/perf/Build
index 5e385f370dd7..312914994c89 100644
--- a/tools/perf/Build
+++ b/tools/perf/Build
@@ -76,3 +76,16 @@ $(OUTPUT)%.shellcheck_log: %
 	$(Q)$(call echo-cmd,test)shellcheck -s bash -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-y += $(SHELL_TEST_LOGS)
+
+ifdef MYPY
+  PY_TESTS := $(shell find python -type f -name '*.py')
+  MYPY_TEST_LOGS := $(PY_TESTS:python/%=python/%.mypy_log)
+else
+  MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+perf-y += $(MYPY_TEST_LOGS)
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index aebdf317afcc..c773f0dd8226 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -306,8 +306,13 @@ ifneq ($(SHELLCHECK),)
   endif
 endif
 
+# Runs mypy on perf python files
+ifeq ($(MYPY),1)
+  MYPY := $(shell which mypy 2> /dev/null)
+endif
+
 export srctree OUTPUT RM CC CXX LD AR CFLAGS CXXFLAGS V BISON FLEX AWK
-export HOSTCC HOSTLD HOSTAR HOSTCFLAGS SHELLCHECK
+export HOSTCC HOSTLD HOSTAR HOSTCFLAGS SHELLCHECK MYPY
 
 include $(srctree)/tools/build/Makefile.include
 
diff --git a/tools/perf/pmu-events/Build b/tools/perf/pmu-events/Build
index d941bc9d16e9..fc1dc810ffb6 100644
--- a/tools/perf/pmu-events/Build
+++ b/tools/perf/pmu-events/Build
@@ -41,7 +41,19 @@ $(EMPTY_PMU_EVENTS_TEST_LOG): $(EMPTY_PMU_EVENTS_C) $(TEST_EMPTY_PMU_EVENTS_C)
 	$(call rule_mkdir)
 	$(Q)$(call echo-cmd,test)diff -u $^ 2> $@ || (cat $@ && false)
 
-$(PMU_EVENTS_C): $(JSON) $(JSON_TEST) $(JEVENTS_PY) $(METRIC_PY) $(METRIC_TEST_LOG) $(EMPTY_PMU_EVENTS_TEST_LOG)
+ifdef MYPY
+  PMU_EVENTS_PY_TESTS := $(wildcard *.py)
+  PMU_EVENTS_MYPY_TEST_LOGS := $(JEVENTS_PY_TESTS:%=%.mypy_log)
+else
+  PMU_EVENTS_MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+$(PMU_EVENTS_C): $(JSON) $(JSON_TEST) $(JEVENTS_PY) $(METRIC_PY) $(METRIC_TEST_LOG) \
+    $(EMPTY_PMU_EVENTS_TEST_LOG) $(PMU_EVENTS_MYPY_TEST_LOGS)
 	$(call rule_mkdir)
 	$(Q)$(call echo-cmd,gen)$(PYTHON) $(JEVENTS_PY) $(JEVENTS_ARCH) $(JEVENTS_MODEL) pmu-events/arch $@
 endif
diff --git a/tools/perf/scripts/Build b/tools/perf/scripts/Build
index 46f0c6f76dbf..a5350dc6ac50 100644
--- a/tools/perf/scripts/Build
+++ b/tools/perf/scripts/Build
@@ -2,3 +2,16 @@ ifeq ($(CONFIG_LIBTRACEEVENT),y)
   perf-util-$(CONFIG_LIBPERL)   += perl/Perf-Trace-Util/
 endif
 perf-util-$(CONFIG_LIBPYTHON) += python/Perf-Trace-Util/
+
+ifdef MYPY
+  PY_TESTS := $(shell find python -type f -name '*.py')
+  MYPY_TEST_LOGS := $(PY_TESTS:python/%=python/%.mypy_log)
+else
+  MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+perf-y += $(MYPY_TEST_LOGS)
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index 5b4b7a3825fd..0d4af485bf55 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -91,3 +91,16 @@ $(OUTPUT)%.shellcheck_log: %
 	$(Q)$(call echo-cmd,test)shellcheck -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-test-y += $(SHELL_TEST_LOGS)
+
+ifdef MYPY
+  PY_TESTS := $(shell find tests/shell -type f -name '*.py')
+  MYPY_TEST_LOGS := $(PY_TESTS:tests/shell/%=shell/%.mypy_log)
+else
+  MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+perf-test-y += $(MYPY_TEST_LOGS)
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index fd595454766e..583f425713eb 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -417,3 +417,16 @@ $(OUTPUT)%.shellcheck_log: %
 	$(Q)$(call echo-cmd,test)shellcheck -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-util-y += $(SHELL_TEST_LOGS)
+
+PY_TESTS := setup.py
+ifdef MYPY
+  MYPY_TEST_LOGS := $(PY_TESTS:%=%.mypy_log)
+else
+  MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+perf-util-y += $(MYPY_TEST_LOGS)
-- 
2.49.0.rc0.332.g42c0ae87b1-goog


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