buildroot

# See utils/checkpackagelib/readme.txt before editing this file.

# There are already dependency checks during the build, so below check

# functions don't need to check for things already checked by exploring the

# menu options using "make menuconfig" and by running "make" with appropriate

# packages enabled.

​

import re

​

from base import _CheckFunction

# Notice: ignore 'imported but unused' from pyflakes for check functions.

from lib import ConsecutiveEmptyLines

from lib import EmptyLastLine

from lib import NewlineAtEof

from lib import TrailingSpace

​

​

class Indent(_CheckFunction):

    COMMENT = re.compile("^\s*#")

    CONDITIONAL = re.compile("^\s*(ifeq|ifneq|endif)\s")

    ENDS_WITH_BACKSLASH = re.compile(r"^[^#].*\\$")

    END_DEFINE = re.compile("^\s*endef\s")

    MAKEFILE_TARGET = re.compile("^[^# \t]+:\s")

    START_DEFINE = re.compile("^\s*define\s")

​

    def before(self):

        self.define = False

        self.backslash = False

        self.makefile_target = False

​

    def check_line(self, lineno, text):

        if self.START_DEFINE.search(text):

            self.define = True

            return

        if self.END_DEFINE.search(text):

            self.define = False

            return

​

        expect_tabs = False

        if self.define or self.backslash or self.makefile_target:

            expect_tabs = True

        if self.CONDITIONAL.search(text):

            expect_tabs = False

​

        # calculate for next line

        if self.ENDS_WITH_BACKSLASH.search(text):

            self.backslash = True

        else:

            self.backslash = False

​

        if self.MAKEFILE_TARGET.search(text):

            self.makefile_target = True

            return

        if text.strip() == "":

            self.makefile_target = False

            return

​

        # comment can be indented or not inside define ... endef, so ignore it

        if self.define and self.COMMENT.search(text):

            return

​

        if expect_tabs:

            if not text.startswith("\t"):

                return ["{}:{}: expected indent with tabs"