kbuild: deb-pkg: create source package without cleaning

If you run 'make deb-pkg', all objects are lost due to 'make clean',
which makes the incremental builds impossible.

Instead of cleaning, pass the exclude list to tar's --exclude-from
option.

Previously, *.diff.gz contained some check-in files such as
.clang-format, .cocciconfig.

With this commit, *.diff.gz will only contain the .config and debian/.
The other source files will go into the .orig tarball.

linux.tar.gz is rebuilt only when the source files that would go into
the tarball are changed.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>

1 files changed, 24 insertions, 0 deletions

diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian
index c3bbef7a6754..68b13ef590ba 100755
--- a/scripts/package/mkdebian
+++ b/scripts/package/mkdebian
@@ -84,6 +84,8 @@ set_debarch() {
 	fi
 }
 
+rm -rf debian
+
 # Some variables and settings used throughout the script
 version=$KERNELRELEASE
 if [ -n "$KDEB_PKGVERSION" ]; then
@@ -135,6 +137,28 @@ fi
 mkdir -p debian/source/
 echo "1.0" > debian/source/format
 
+# Ugly: ignore anything except .config or debian/
+cat<<'EOF' > debian/source/local-options
+diff-ignore
+
+extend-diff-ignore = ^[^.d]
+
+extend-diff-ignore = ^\.[^c]
+extend-diff-ignore = ^\.c($|[^o])
+extend-diff-ignore = ^\.co($|[^n])
+extend-diff-ignore = ^\.con($|[^f])
+extend-diff-ignore = ^\.conf($|[^i])
+extend-diff-ignore = ^\.confi($|[^g])
+extend-diff-ignore = ^\.config.
+
+extend-diff-ignore = ^d($|[^e])
+extend-diff-ignore = ^de($|[^b])
+extend-diff-ignore = ^deb($|[^i])
+extend-diff-ignore = ^debi($|[^a])
+extend-diff-ignore = ^debia($|[^n])
+extend-diff-ignore = ^debian[^/]
+EOF
+
 echo $debarch > debian/arch
 extra_build_depends=", $(if_enabled_echo CONFIG_UNWINDER_ORC libelf-dev:native)"
 extra_build_depends="$extra_build_depends, $(if_enabled_echo CONFIG_SYSTEM_TRUSTED_KEYRING libssl-dev:native)"