kbuild: deb-pkg: introduce is_enabled and if_enabled_echo to builddeb

I think is_enabled() and if_enable_echo() in scripts/package/mkdebian
are useful.

builddeb also has many repetitive greps over the kernel config, so I
borrowed the idea to clean it up.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

1 files changed, 19 insertions, 13 deletions

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index 8ac25d10a6ad..e2cb43895e14 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -12,6 +12,18 @@
 
 set -e
 
+is_enabled() {
+        grep -q "^$1=y" $KCONFIG_CONFIG
+}
+
+if_enabled_echo() {
+        if is_enabled "$1"; then
+                echo -n "$2"
+        elif [ $# -ge 3 ]; then
+                echo -n "$3"
+        fi
+}
+
 create_package() {
         local pname="$1" pdir="$2"
 
@@ -62,7 +74,7 @@ parisc|mips|powerpc)
         installed_image_path="boot/vmlinuz-$version"
 esac
 
-BUILD_DEBUG="$(grep -s '^CONFIG_DEBUG_INFO=y' $KCONFIG_CONFIG || true)"
+BUILD_DEBUG=$(if_enabled_echo CONFIG_DEBUG_INFO Yes)
 
 # Setup the directory structure
 rm -rf "$tmpdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir" $objtree/debian/files
@@ -83,14 +95,14 @@ else
 fi
 cp "$($MAKE -s -f $srctree/Makefile image_name)" "$tmpdir/$installed_image_path"
 
-if grep -q "^CONFIG_OF_EARLY_FLATTREE=y" $KCONFIG_CONFIG ; then
+if is_enabled CONFIG_OF_EARLY_FLATTREE; then
         # Only some architectures with OF support have this target
         if [ -d "${srctree}/arch/$SRCARCH/boot/dts" ]; then
                 $MAKE -f $srctree/Makefile INSTALL_DTBS_PATH="$tmpdir/usr/lib/$packagename" dtbs_install
         fi
 fi
 
-if grep -q '^CONFIG_MODULES=y' $KCONFIG_CONFIG ; then
+if is_enabled CONFIG_MODULES; then
         INSTALL_MOD_PATH="$tmpdir" $MAKE -f $srctree/Makefile modules_install
         rm -f "$tmpdir/lib/modules/$version/build"
         rm -f "$tmpdir/lib/modules/$version/source"
@@ -111,8 +123,7 @@ if grep -q '^CONFIG_MODULES=y' $KCONFIG_CONFIG ; then
                 done
 
                 # resign stripped modules
-                MODULE_SIG_ALL="$(grep -s '^CONFIG_MODULE_SIG_ALL=y' $KCONFIG_CONFIG || true)"
-                if [ -n "$MODULE_SIG_ALL" ]; then
+                if is_enabled CONFIG_MODULE_SIG_ALL; then
                         INSTALL_MOD_PATH="$tmpdir" $MAKE -f $srctree/Makefile modules_sign
                 fi
         fi
@@ -129,11 +140,6 @@ fi
 # make-kpkg sets $INITRD to indicate whether an initramfs is wanted, and
 # so do we; recent versions of dracut and initramfs-tools will obey this.
 debhookdir=${KDEB_HOOKDIR:-/etc/kernel}
-if grep -q '^CONFIG_BLK_DEV_INITRD=y' $KCONFIG_CONFIG; then
-        want_initrd=Yes
-else
-        want_initrd=No
-fi
 for script in postinst postrm preinst prerm ; do
         mkdir -p "$tmpdir$debhookdir/$script.d"
         cat <<EOF > "$tmpdir/DEBIAN/$script"
@@ -145,7 +151,7 @@ set -e
 export DEB_MAINT_PARAMS="\$*"
 
 # Tell initramfs builder whether it's wanted
-export INITRD=$want_initrd
+export INITRD=$(if_enabled_echo CONFIG_BLK_DEV_INITRD Yes No)
 
 test -d $debhookdir/$script.d && run-parts --arg="$version" --arg="/$installed_image_path" $debhookdir/$script.d
 exit 0
@@ -158,11 +164,11 @@ done
 (cd $srctree; find arch/*/include include scripts -type f -o -type l) >> "$objtree/debian/hdrsrcfiles"
 (cd $srctree; find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform) >> "$objtree/debian/hdrsrcfiles"
 (cd $srctree; find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f) >> "$objtree/debian/hdrsrcfiles"
-if grep -q '^CONFIG_STACK_VALIDATION=y' $KCONFIG_CONFIG ; then
+if is_enabled CONFIG_STACK_VALIDATION; then
         (cd $objtree; find tools/objtool -type f -executable) >> "$objtree/debian/hdrobjfiles"
 fi
 (cd $objtree; find arch/$SRCARCH/include Module.symvers include scripts -type f) >> "$objtree/debian/hdrobjfiles"
-if grep -q '^CONFIG_GCC_PLUGINS=y' $KCONFIG_CONFIG ; then
+if is_enabled CONFIG_GCC_PLUGINS; then
         (cd $objtree; find scripts/gcc-plugins -name \*.so -o -name gcc-common.h) >> "$objtree/debian/hdrobjfiles"
 fi
 destdir=$kernel_headers_dir/usr/src/linux-headers-$version