Merge "kheaders: include only headers into kheaders_data.tar.xz"

# This script generates an archive consisting of kernel headers

# for CONFIG_IKHEADERS.

set -e

spath="$(dirname "$(readlink -f "$0")")"

kroot="$spath/.."

sfile="$(readlink -f "$0")"

outdir="$(pwd)"

tarfile=$1

cpio_dir=$outdir/$tarfile.tmp

# Script filename relative to the kernel source root

# We add it to the archive because it is small and any changes

# to this script will also cause a rebuild of the archive.

sfile="$(realpath --relative-to $kroot "$(readlink -f "$0")")"

src_file_list="

include/

arch/$SRCARCH/include/

$sfile

"

obj_file_list="

dir_list="

include/

arch/$SRCARCH/include/

"

# Uncomment it for debugging.

# if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter;

# else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi

# find $src_file_list -type f | xargs ls -lR > /tmp/src-ls-$iter

# find $obj_file_list -type f | xargs ls -lR > /tmp/obj-ls-$iter

# find $src_file_list -name "*.h" | xargs ls -l > /tmp/src-ls-$iter

# find $obj_file_list -name "*.h" | xargs ls -l > /tmp/obj-ls-$iter

# include/generated/compile.h is ignored because it is touched even when none

# of the source files changed. This causes pointless regeneration, so let us

# ignore them for md5 calculation.

pushd $kroot > /dev/null

src_files_md5="$(find $src_file_list -type f                       |

pushd $srctree > /dev/null

src_files_md5="$(find $dir_list -name "*.h"			   |

		grep -v "include/generated/compile.h"		   |

		grep -v "include/generated/autoconf.h"		   |

		grep -v "include/config/auto.conf"		   |

		grep -v "include/config/auto.conf.cmd"		   |

		grep -v "include/config/tristate.conf"		   |

		xargs ls -lR | md5sum | cut -d ' ' -f1)"

		xargs ls -l | md5sum | cut -d ' ' -f1)"

popd > /dev/null

obj_files_md5="$(find $obj_file_list -type f                       |

obj_files_md5="$(find $dir_list -name "*.h"			   |

		grep -v "include/generated/compile.h"		   |

		grep -v "include/generated/autoconf.h"		   |

		grep -v "include/config/auto.conf"                 |

		grep -v "include/config/auto.conf.cmd"		   |

		grep -v "include/config/tristate.conf"		   |

		xargs ls -lR | md5sum | cut -d ' ' -f1)"

		xargs ls -l | md5sum | cut -d ' ' -f1)"

# Any changes to this script will also cause a rebuild of the archive.

this_file_md5="$(ls -l $sfile | md5sum | cut -d ' ' -f1)"

if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi

if [ -f kernel/kheaders.md5 ] &&

	[ "$(cat kernel/kheaders.md5|head -1)" == "$src_files_md5" ] &&

	[ "$(cat kernel/kheaders.md5|head -2|tail -1)" == "$obj_files_md5" ] &&

	[ "$(cat kernel/kheaders.md5|head -3|tail -1)" == "$this_file_md5" ] &&

	[ "$(cat kernel/kheaders.md5|tail -1)" == "$tarfile_md5" ]; then

		exit

fi

rm -rf $cpio_dir

mkdir $cpio_dir

pushd $kroot > /dev/null

for f in $src_file_list;

	do find "$f" ! -name "*.cmd" ! -name ".*";

pushd $srctree > /dev/null

for f in $dir_list;

	do find "$f" -name "*.h";

done | cpio --quiet -pd $cpio_dir

popd > /dev/null

# The second CPIO can complain if files already exist which can

# happen with out of tree builds. Just silence CPIO for now.

for f in $obj_file_list;

	do find "$f" ! -name "*.cmd" ! -name ".*";

for f in $dir_list;

	do find "$f" -name "*.h";

done | cpio --quiet -pd $cpio_dir >/dev/null 2>&1

# Remove comments except SDPX lines

echo "$src_files_md5" >  kernel/kheaders.md5

echo "$obj_files_md5" >> kernel/kheaders.md5

echo "$this_file_md5" >> kernel/kheaders.md5

echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5

rm -rf $cpio_dir