kumquat-buildroot/fs/tar/tar.mk

################################################################################
#
# tar to archive target filesystem
#
################################################################################

TAR_OPTS = $(call qstrip,$(BR2_TARGET_ROOTFS_TAR_OPTIONS))

ROOTFS_TAR_DEPENDENCIES = $(BR2_TAR_HOST_DEPENDENCY)

# do not store atime/ctime in PaxHeaders to ensure reproducbility
TAR_OPTS += --pax-option=exthdr.name=%d/PaxHeaders/%f,atime:=0,ctime:=0

define ROOTFS_TAR_CMD
	(cd $(TARGET_DIR); find -print0 | LC_ALL=C sort -z | \
		tar $(TAR_OPTS) -cf $@ --null --xattrs-include='*' --no-recursion -T - --numeric-owner)
endef

$(eval $(rootfs))
Normalize separator size to 80 Signed-off-by: Jerzy Grzegorek <jerzy.grzegorek@trzebnica.net> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> 2013-06-06 23:54:13 +02:00			`################################################################################`
allow users to generate tarballs of the target filesystem 2005-02-09 17:06:06 +01:00			`#`
			`# tar to archive target filesystem`
			`#`
Normalize separator size to 80 Signed-off-by: Jerzy Grzegorek <jerzy.grzegorek@trzebnica.net> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> 2013-06-06 23:54:13 +02:00			`################################################################################`
allow users to generate tarballs of the target filesystem 2005-02-09 17:06:06 +01:00
fs: don't use := when not needed Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> 2019-10-26 10:45:59 +02:00			`TAR_OPTS = $(call qstrip,$(BR2_TARGET_ROOTFS_TAR_OPTIONS))`
rework fakeroot handling to avoid races during parallel make causing several fakeroot instances stomping eachother's temp files. 2006-04-07 22:30:43 +02:00
package/pkg-generic: handle host-tar as an extract dependency This moves the host-tar dependency handling from DEPENDENCY_HOST_PREREQ to an extract dependency. To achieve that, check-host-tar.mk fills in the BR2_TAR_HOST_DEPENDENCY variable with host-tar if building a host-tar is needed. The name BR2_TAR_HOST_DEPENDENCY has been chosen because it matches the name BR2_CMAKE_HOST_DEPENDENCY already used in check-host-cmake.mk. The BR2_TAR_HOST_DEPENDENCY is added to all packages, except host-tar itself (obviously) and host-skeleton, because we depend on host-skeleton to install host-tar properly in HOST_DIR. In addition, we modify tar.mk to explicitly build host-tar without ccache: since ccache source code is available as a tarball, ccache will obviously depend on host-tar if the system tar is insufficient. Finally, to make things really clean, we also add $(BR2_TAR_HOST_DEPENDENCY) to the dependencies of the tar filesystem format, since it requires tar, so we'd better make sure we have a suitable tar. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Tested-by: Matt Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com> 2018-03-24 15:20:03 +01:00			`ROOTFS_TAR_DEPENDENCIES = $(BR2_TAR_HOST_DEPENDENCY)`

fs/tar: explicitly set extended header values to ensure binary reproducibility Since we use --xattrs-include='*' to include all extended attributes, tar creates a PAX formatted archive. The archive metadata captures atime and ctime of files. To fix this, GNU recommends that we pass this added argument to tar to create binary reproducible packages. Setting of mtime is handled in fs/common.mk using touch on all files. Diffoscope output pre-change: https://gitlab.com/snippets/1871111 Diffoscope output after change is blank i.e. binary reproducibile rootfs is created. GNU Recommendation: https://www.gnu.org/software/tar/manual/tar.html#SEC147 Signed-off-by: Atharva Lele <itsatharva@gmail.com> Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com> 2019-07-06 08:55:01 +02:00			`# do not store atime/ctime in PaxHeaders to ensure reproducbility`
			`TAR_OPTS += --pax-option=exthdr.name=%d/PaxHeaders/%f,atime:=0,ctime:=0`

tar: convert to ROOTFS_TARGET infrastructure Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 2010-03-10 00:14:16 +01:00			`define ROOTFS_TAR_CMD`
fs/tar: make results reproducible In order to make tar images reproducible, force files order in tarball. This work was sponsored by `BA Robotic Systems'. Signed-off-by: Jérôme Pouiller <jezz@sysmic.org> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 2016-11-23 13:58:43 +01:00			`(cd $(TARGET_DIR); find -print0 \| LC_ALL=C sort -z \| \`
fs/tar: add support for xattrs (thus capabilties) By default, tar will not include any extended attribute (xattr) when creating archives, and thus will not store capabilties either (as they are stored in the xattr 'security.capability'). Using option --xattrs is enough to create a tarball with all the xattrs attached to a file. However, extracting all xattrs from a tarball requires that --xattrs-include='' be used. This is not symetric (but on purpose, as per the documentation), and so is confusing to some. So, we use --xattrs-include='' to create the archive, so as to be explicit that we want all xattrs to be stored. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Ricardo Martincoski <ricardo.martincoski@gmail.com> Cc: Peter Korsgaard <peter@korsgaard.com> Cc: Arnout Vandecappelle <arnout@mind.be> Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Signed-off-by: Peter Korsgaard <peter@korsgaard.com> 2018-11-12 18:33:12 +01:00			`tar $(TAR_OPTS) -cf $@ --null --xattrs-include='*' --no-recursion -T - --numeric-owner)`
tar: convert to ROOTFS_TARGET infrastructure Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 2010-03-10 00:14:16 +01:00			`endef`
- provide a choice to select the compressor to use for the final rootfs. Closes #1014 2006-11-29 20:16:48 +01:00
fs: make it behave a bit more like the package infra Currently, to register a filesystem, one has to call: $(eval $(call ROOTFS_TARGET,blabla)) This is very unlike the package infrastructure, where the name of the package is automatically guessed by the infra. It turns out that we can now do that for the filesystem infra too. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 2017-12-28 11:40:32 +01:00			`$(eval $(rootfs))`