[Buildroot] [PATCH] utils/checkpackagelib/lib_mk.py: handle 'else' and 'elif' statements

Thomas De Schampheleire patrickdepinguin at gmail.com
Wed Dec 9 15:32:18 UTC 2020

From: Thomas De Schampheleire <thomas.de_schampheleire at nokia.com>

An 'else' or 'elif' clause inside a make conditional should not be indented
in the same way as the if/endif clause. check-package did not recognize the
else statement and expected an indentation.

For example:

ifdef FOOBAR
	more interesting

would, according to check-package, need to become:

ifdef FOOBAR
	more interesting

Treat 'else' and 'elif' the same as if-like keywords in the Indent test, but
take into account that 'else' is also valid shell, so we need to correctly
handle line continuation to prevent complaining about the 'else' in:

ifdef FOOBAR
	if true; \
	    ... \
	else \
	    ... \

We don't add the 'else' and 'elif' statements to start_conditional, because
it would cause incorrect nesting counting in class OverriddenVariable.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire at nokia.com>
 utils/checkpackagelib/lib_mk.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/utils/checkpackagelib/lib_mk.py b/utils/checkpackagelib/lib_mk.py
index 45e37e4598..0278354434 100644
--- a/utils/checkpackagelib/lib_mk.py
+++ b/utils/checkpackagelib/lib_mk.py
@@ -16,12 +16,13 @@ from checkpackagelib.lib import Utf8Characters         # noqa: F401
 # used in more than one check
 start_conditional = ["ifdef", "ifeq", "ifndef", "ifneq"]
+continue_conditional = ["elif", "else"]
 end_conditional = ["endif"]
 class Indent(_CheckFunction):
     COMMENT = re.compile(r"^\s*#")
-    CONDITIONAL = re.compile(r"^\s*({})\s".format("|".join(start_conditional + end_conditional)))
+    CONDITIONAL = re.compile(r"^\s*({})\s".format("|".join(start_conditional + end_conditional + continue_conditional)))
     ENDS_WITH_BACKSLASH = re.compile(r"^[^#].*\\$")
     END_DEFINE = re.compile(r"^\s*endef\s")
     MAKEFILE_TARGET = re.compile(r"^[^# \t]+:\s")
@@ -43,7 +44,7 @@ class Indent(_CheckFunction):
         expect_tabs = False
         if self.define or self.backslash or self.makefile_target:
             expect_tabs = True
-        if self.CONDITIONAL.search(text):
+        if not self.backslash and self.CONDITIONAL.search(text):
             expect_tabs = False
         # calculate for next line

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