.mk files: bulk aligment and whitespace cleanup of assignments

The Buildroot coding style defines one space around make assignments and
does not align the assignment symbols.

This patch does a bulk fix of offending packages. The package
infrastructures (or more in general assignments to calculated variable
names, like $(2)_FOO) are not touched.

Alignment of line continuation characters (\) is kept as-is.

The sed command used to do this replacement is:
find * -name "*.mk" | xargs sed -i \
    -e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\s*$#\1 \2#'
    -e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\s*\([^\\]\+\)$#\1 \2 \3#'
    -e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\s*\([^\\ \t]\+\s*\\\)\s*$#\1 \2 \3#'
    -e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\(\s*\\\)#\1 \2\3#'

Brief explanation of this command:
    ^\([A-Z0-9a-z_]\+\)     a regular variable at the beginning of the line
    \([?:+]\?=\)            any assignment character =, :=, ?=, +=
    \([^\\]\+\)             any string not containing a line continuation
    \([^\\ \t]\+\s*\\\)     string, optional whitespace, followed by a
                            line continuation character
    \(\s*\\\)               optional whitespace, followed by a line
                            continuation character

Hence, the first subexpression handles empty assignments, the second
handles regular assignments, the third handles regular assignments with
line continuation, and the fourth empty assignments with line
continuation.

This expression was tested on following test text: (initial tab not
included)

	FOO     = spaces before
	FOO     =   spaces before and after
	FOO	= tab before
	FOO	  = tab and spaces before
	FOO =	tab after
	FOO =	   tab and spaces after
	FOO =   	spaces and tab after
	FOO =    \
	FOO = bar \
	FOO = bar space    \
	FOO   =		   \
	GENIMAGE_DEPENDENCIES   = host-pkgconf libconfuse
	FOO     += spaces before
	FOO     ?=   spaces before and after
	FOO     :=
	FOO     =
	FOO	=
	FOO	  =
	FOO =
	   $(MAKE1) CROSS_COMPILE=$(TARGET_CROSS) -C
	AT91BOOTSTRAP3_DEFCONFIG = \
	AXEL_DISABLE_I18N=--i18n=0

After this bulk change, following manual fixups were done:
- fix line continuation alignment in cegui06 and spice (the sed
  expression leaves the number of whitespace between the value and line
  continuation character intact, but the whitespace before that could have
  changed, causing misalignment.
- qt5base was reverted, as this package uses extensive alignment which
  actually makes the code more readable.

Finally, the end result was manually reviewed.

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Cc: Yann E. Morin <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

boot/boot-wrapper-aarch64/boot-wrapper-aarch64.mk

@@ -4,11 +4,11 @@
 #
 ################################################################################
 
-BOOT_WRAPPER_AARCH64_VERSION        = 4266507a84f8c06452109d38e0350d4759740694
-BOOT_WRAPPER_AARCH64_SITE           = git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/boot-wrapper-aarch64.git
-BOOT_WRAPPER_AARCH64_LICENSE        = BSD3c
-BOOT_WRAPPER_AARCH64_LICENSE_FILES  = LICENSE.txt
-BOOT_WRAPPER_AARCH64_DEPENDENCIES   = linux
+BOOT_WRAPPER_AARCH64_VERSION = 4266507a84f8c06452109d38e0350d4759740694
+BOOT_WRAPPER_AARCH64_SITE = git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/boot-wrapper-aarch64.git
+BOOT_WRAPPER_AARCH64_LICENSE = BSD3c
+BOOT_WRAPPER_AARCH64_LICENSE_FILES = LICENSE.txt
+BOOT_WRAPPER_AARCH64_DEPENDENCIES = linux
 BOOT_WRAPPER_AARCH64_INSTALL_IMAGES = YES
 
 # The Git repository does not have the generated configure script and

boot/grub/grub.mk

@@ -6,8 +6,8 @@
 
 GRUB_VERSION = 0.97
 GRUB_SOURCE = grub_$(GRUB_VERSION).orig.tar.gz
-GRUB_PATCH  = grub_$(GRUB_VERSION)-67.diff.gz
-GRUB_SITE   = http://snapshot.debian.org/archive/debian/20130129T225227Z/pool/main/g/grub
+GRUB_PATCH = grub_$(GRUB_VERSION)-67.diff.gz
+GRUB_SITE = http://snapshot.debian.org/archive/debian/20130129T225227Z/pool/main/g/grub
 
 GRUB_LICENSE = GPLv2+
 GRUB_LICENSE_FILES = COPYING

boot/syslinux/syslinux.mk

@@ -5,8 +5,8 @@
 ################################################################################
 
 SYSLINUX_VERSION = 6.02
-SYSLINUX_SOURCE  = syslinux-$(SYSLINUX_VERSION).tar.xz
-SYSLINUX_SITE    = $(BR2_KERNEL_MIRROR)/linux/utils/boot/syslinux
+SYSLINUX_SOURCE = syslinux-$(SYSLINUX_VERSION).tar.xz
+SYSLINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/utils/boot/syslinux
 
 SYSLINUX_LICENSE = GPLv2+
 SYSLINUX_LICENSE_FILES = COPYING

boot/uboot/uboot.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-UBOOT_VERSION    = $(call qstrip,$(BR2_TARGET_UBOOT_VERSION))
+UBOOT_VERSION = $(call qstrip,$(BR2_TARGET_UBOOT_VERSION))
 UBOOT_BOARD_NAME = $(call qstrip,$(BR2_TARGET_UBOOT_BOARDNAME))
 
 UBOOT_LICENSE = GPLv2+
@@ -15,48 +15,48 @@ UBOOT_INSTALL_IMAGES = YES
 ifeq ($(UBOOT_VERSION),custom)
 # Handle custom U-Boot tarballs as specified by the configuration
 UBOOT_TARBALL = $(call qstrip,$(BR2_TARGET_UBOOT_CUSTOM_TARBALL_LOCATION))
-UBOOT_SITE    = $(patsubst %/,%,$(dir $(UBOOT_TARBALL)))
-UBOOT_SOURCE  = $(notdir $(UBOOT_TARBALL))
+UBOOT_SITE = $(patsubst %/,%,$(dir $(UBOOT_TARBALL)))
+UBOOT_SOURCE = $(notdir $(UBOOT_TARBALL))
 else ifeq ($(BR2_TARGET_UBOOT_CUSTOM_GIT),y)
-UBOOT_SITE        = $(call qstrip,$(BR2_TARGET_UBOOT_CUSTOM_REPO_URL))
+UBOOT_SITE = $(call qstrip,$(BR2_TARGET_UBOOT_CUSTOM_REPO_URL))
 UBOOT_SITE_METHOD = git
 else ifeq ($(BR2_TARGET_UBOOT_CUSTOM_HG),y)
-UBOOT_SITE        = $(call qstrip,$(BR2_TARGET_UBOOT_CUSTOM_REPO_URL))
+UBOOT_SITE = $(call qstrip,$(BR2_TARGET_UBOOT_CUSTOM_REPO_URL))
 UBOOT_SITE_METHOD = hg
 else
 # Handle stable official U-Boot versions
-UBOOT_SITE    = ftp://ftp.denx.de/pub/u-boot
-UBOOT_SOURCE  = u-boot-$(UBOOT_VERSION).tar.bz2
+UBOOT_SITE = ftp://ftp.denx.de/pub/u-boot
+UBOOT_SOURCE = u-boot-$(UBOOT_VERSION).tar.bz2
 endif
 
 ifeq ($(BR2_TARGET_UBOOT_FORMAT_ELF),y)
-UBOOT_BIN          = u-boot
+UBOOT_BIN = u-boot
 else ifeq ($(BR2_TARGET_UBOOT_FORMAT_KWB),y)
-UBOOT_BIN          = u-boot.kwb
-UBOOT_MAKE_TARGET  = $(UBOOT_BIN)
+UBOOT_BIN = u-boot.kwb
+UBOOT_MAKE_TARGET = $(UBOOT_BIN)
 else ifeq ($(BR2_TARGET_UBOOT_FORMAT_AIS),y)
-UBOOT_BIN          = u-boot.ais
-UBOOT_MAKE_TARGET  = $(UBOOT_BIN)
+UBOOT_BIN = u-boot.ais
+UBOOT_MAKE_TARGET = $(UBOOT_BIN)
 else ifeq ($(BR2_TARGET_UBOOT_FORMAT_LDR),y)
-UBOOT_BIN          = u-boot.ldr
+UBOOT_BIN = u-boot.ldr
 else ifeq ($(BR2_TARGET_UBOOT_FORMAT_NAND_BIN),y)
-UBOOT_BIN          = u-boot-nand.bin
+UBOOT_BIN = u-boot-nand.bin
 else ifeq ($(BR2_TARGET_UBOOT_FORMAT_IMG),y)
-UBOOT_BIN          = u-boot.img
+UBOOT_BIN = u-boot.img
 else ifeq ($(BR2_TARGET_UBOOT_FORMAT_IMX),y)
-UBOOT_BIN          = u-boot.imx
+UBOOT_BIN = u-boot.imx
 else ifeq ($(BR2_TARGET_UBOOT_FORMAT_SB),y)
-UBOOT_BIN          = u-boot.sb
-UBOOT_MAKE_TARGET  = $(UBOOT_BIN)
+UBOOT_BIN = u-boot.sb
+UBOOT_MAKE_TARGET = $(UBOOT_BIN)
 UBOOT_DEPENDENCIES += host-elftosb
 else ifeq ($(BR2_TARGET_UBOOT_FORMAT_CUSTOM),y)
-UBOOT_BIN          = $(call qstrip,$(BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME))
+UBOOT_BIN = $(call qstrip,$(BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME))
 else
-UBOOT_BIN          = u-boot.bin
-UBOOT_BIN_IFT      = $(UBOOT_BIN).ift
+UBOOT_BIN = u-boot.bin
+UBOOT_BIN_IFT = $(UBOOT_BIN).ift
 endif
 
-UBOOT_ARCH=$(KERNEL_ARCH)
+UBOOT_ARCH = $(KERNEL_ARCH)
 
 UBOOT_CONFIGURE_OPTS += CONFIG_NOSOFTFLOAT=1
 UBOOT_MAKE_OPTS += \

boot/xloader/xloader.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-XLOADER_VERSION    = 6f3a26101303051e0f91b6213735b68ce804e94e
-XLOADER_SITE       = git://gitorious.org/x-loader/x-loader.git
+XLOADER_VERSION = 6f3a26101303051e0f91b6213735b68ce804e94e
+XLOADER_SITE = git://gitorious.org/x-loader/x-loader.git
 XLOADER_BOARD_NAME = $(call qstrip,$(BR2_TARGET_XLOADER_BOARDNAME))
 
 XLOADER_LICENSE = GPLv2+