[PATCH v2] [PATCH] perf build: Specify that shellcheck should use the bash dialect.

[Collin Funk]

When someone has a global shellcheckrc file, for example at
~/.config/shellcheckrc, with the directive 'shell=sh', building perf
will fail with many shellcheck errors like:

    In tests/shell/base_probe/test_adding_kernel.sh line 294:
    (( TEST_RESULT += $? ))
    ^---------------------^ SC3006 (warning): In POSIX sh, standalone ((..)) is undefined.

    For more information:
      https://www.shellcheck.net/wiki/SC3006 -- In POSIX sh, standalone ((..)) is...
    make[5]: *** [tests/Build:91: tests/shell/base_probe/test_adding_kernel.sh.shellcheck_log] Error 1

Passing the '-s bash' option ensures that it runs correctly regardless
of a developers global configuration.

This patch adds '-s bash' to the SHELLCHECK variable in Makefile.perf
and makes use of the variable consistently.

Signed-off-by: Collin Funk <collin.funk1@xxxxxxxxx>
---
 tools/perf/Build                | 2 +-
 tools/perf/Makefile.perf        | 2 +-
 tools/perf/arch/x86/Build       | 2 +-
 tools/perf/arch/x86/tests/Build | 2 +-
 tools/perf/tests/Build          | 2 +-
 tools/perf/trace/beauty/Build   | 2 +-
 tools/perf/util/Build           | 2 +-
 7 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/perf/Build b/tools/perf/Build
index 06107f1e1d42..e69665bf9dce 100644
--- a/tools/perf/Build
+++ b/tools/perf/Build
@@ -73,7 +73,7 @@ endif
 
 $(OUTPUT)%.shellcheck_log: %
 	$(call rule_mkdir)
-	$(Q)$(call echo-cmd,test)shellcheck -s bash -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
+	$(Q)$(call echo-cmd,test)$(SHELLCHECK) -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-y += $(SHELL_TEST_LOGS)
 
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index d4c7031b01a7..6810d321ff73 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -252,7 +252,7 @@ endif
 ifeq ($(NO_SHELLCHECK),1)
   SHELLCHECK :=
 else
-  SHELLCHECK := $(shell which shellcheck 2> /dev/null)
+  SHELLCHECK := $(shell which shellcheck 2> /dev/null) -s bash
 endif
 
 # shellcheck is using in tools/perf/tests/Build with option -a/--check-sourced (
diff --git a/tools/perf/arch/x86/Build b/tools/perf/arch/x86/Build
index afae7b8f6bd6..71e2553e5af1 100644
--- a/tools/perf/arch/x86/Build
+++ b/tools/perf/arch/x86/Build
@@ -10,6 +10,6 @@ endif
 
 $(OUTPUT)%.shellcheck_log: %
 	$(call rule_mkdir)
-	$(Q)$(call echo-cmd,test)shellcheck -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
+	$(Q)$(call echo-cmd,test)$(SHELLCHECK) -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-test-y += $(SHELL_TEST_LOGS)
diff --git a/tools/perf/arch/x86/tests/Build b/tools/perf/arch/x86/tests/Build
index 5e00cbfd2d56..fd3af16f63bb 100644
--- a/tools/perf/arch/x86/tests/Build
+++ b/tools/perf/arch/x86/tests/Build
@@ -22,6 +22,6 @@ endif
 
 $(OUTPUT)%.shellcheck_log: %
 	$(call rule_mkdir)
-	$(Q)$(call echo-cmd,test)shellcheck -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
+	$(Q)$(call echo-cmd,test)$(SHELLCHECK) -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-test-y += $(SHELL_TEST_LOGS)
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index 2181f5a92148..4a27fde30eb6 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -89,7 +89,7 @@ endif
 
 $(OUTPUT)%.shellcheck_log: %
 	$(call rule_mkdir)
-	$(Q)$(call echo-cmd,test)shellcheck -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
+	$(Q)$(call echo-cmd,test)$(SHELLCHECK) -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-test-y += $(SHELL_TEST_LOGS)
 
diff --git a/tools/perf/trace/beauty/Build b/tools/perf/trace/beauty/Build
index f50ebdc445b8..727ce0a5c30a 100644
--- a/tools/perf/trace/beauty/Build
+++ b/tools/perf/trace/beauty/Build
@@ -31,6 +31,6 @@ endif
 
 $(OUTPUT)%.shellcheck_log: %
 	$(call rule_mkdir)
-	$(Q)$(call echo-cmd,test)shellcheck -s bash -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
+	$(Q)$(call echo-cmd,test)$(SHELLCHECK) -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-y += $(SHELL_TEST_LOGS)
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 7910d908c814..626a359fee1e 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -421,7 +421,7 @@ endif
 
 $(OUTPUT)%.shellcheck_log: %
 	$(call rule_mkdir)
-	$(Q)$(call echo-cmd,test)shellcheck -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
+	$(Q)$(call echo-cmd,test)$(SHELLCHECK) -a -S warning "$<" > $@ || (cat $@ && rm $@ && false)
 
 perf-util-y += $(SHELL_TEST_LOGS)
 
-- 
2.49.0