3a6d53c9f0
2 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Vincent Fazio
|
b50eef1dfd |
support/download: drop sub-second precision in tarball creation
Some download backends, like svn, will provide timestamps with a
sub-second precision, e.g.
$ svn info --show-item last-changed-date [...]
2021-02-19T20:22:34.889717Z
However, the PAX headers do not accept sub-second precision, leading to
failure to download from subversion:
tar: Time stamp is out of allowed range
tar: Exiting with failure status due to previous errors
make[1]: *** [package/pkg-generic.mk:148: [...]/build/subversion-1886712/.stamp_downloaded] Error 1
Fix that by massaging the timestamp to drop the sub-second part. We
do that in the generic helper, rather than the svn backend, so that
all callers to the generic helper benefit from this, as this is more
an internal details of the tarball limitations, than of the backends
themselves.
Reported-by: Roosen Henri <Henri.Roosen@ginzinger.com>
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
[yann.morin.1998@free.fr:
- add Henri as reporter
- move it out of the svn backend, and to the generic helper
- reword the commit log accordingly
- use an explicit time format rather than -Iseconds
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
|
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Yann E. MORIN
|
cbe95b1a45 |
support/download: add helper to generate a reproducible archive
We currently need to generate reproducible archives in at least two
locations: the git and svn download backends. We also know of some
future potential use (e.g. the other download backends, like cvs, or
in the upcoming download post-processors for vendoring, like cargo
and go).
However, we are currently limited to a narrow range of tar versions
that we support, to create reproducible archives, because the gnu
format we use has changed with tar 1.30.
As a consequence, and as time advances, more and more distros are,
or will eventually start, shipping with tar 1.30 or later, and thus
we need to always build our on host-tar.
Now, thanks to some grunt work by Vincent, we have a set of options
that we can pass tar, to generate reproducible archives back from
tar-1.27 and up through tar-1.32, the latest released version.
However, those options are non-trivial, so we do not want to have
to repeat those (and maintain them) in multiple locations.
Introduce a helper that can generate a reproducible archive from
an input directory.
The --pax-option, to set specific PAX headers, does not accept
RFC2822 timestamps which value are too away from some fixed point
(set atcompile-time?):
tar: Time stamp is out of allowed range
However, the same timestamps passed as strict compliant ISO 8601 are
accepted, so that's what we expect as a date format.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Vincent Fazio <vfazio@xes-inc.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Reviewed-by: Vincent Fazio <vfazio@xes-inc.com>
---8<------8<------8<------8<---
# Here is a Makefile used to test all the versions of tar, with
# different output formats and different sets of options:
# Versions prior to 1.27 do not build on recent machines, because
# 'gets()' got removed (rightfully so), so don't count them as
# candidates.
VERSIONS = 1.27 1.27.1 1.28 1.29 1.30 1.31 1.32
DATE = Thu 21 May 2020 06:44:11 PM CEST
TARS = \
$(patsubst %,test_gnu_%.tar,$(VERSIONS)) \
$(patsubst %,test_posix_%.tar,$(VERSIONS)) \
$(patsubst %,test_posix_paxoption_%.tar,$(VERSIONS))
all: $(TARS)
sha1sum $(^)
.INTERMEDIATE: test_%.tar
test_gnu_%.tar: tar.% list
./$(<) cf - -C test \
--transform="s#^\./#test-version/#" \
--numeric-owner --owner=0 --group=0 \
--mtime="$(DATE)" \
--format=gnu \
-T list \
>$(@)
test_posix_%.tar: tar.% list
./$(<) cf - -C test \
--transform="s#^\./#test-version/#" \
--numeric-owner --owner=0 --group=0 \
--mtime="$(DATE)" \
--format=posix \
-T list \
>$(@)
test_posix_paxoption_%.tar: tar.% list
./$(<) cf - -C test \
--transform="s#^\./#test-version/#" \
--numeric-owner --owner=0 --group=0 \
--mtime="$(DATE)" \
--format=posix \
--pax-option='delete=atime,delete=ctime,delete=mtime' \
--pax-option='exthdr.name=%d/PaxHeaders/%f,exthdr.mtime={$(DATE)}' \
-T list \
>$(@)
list: .FORCE
list: test
(cd test && find . -not -type d ) |LC_ALL=C sort >$(@)
LONG = L$$(for i in $$(seq 1 200); do printf 'o'; done)ng
test: .FORCE
test:
rm -rf test
mkdir -p test/bar
echo foo >test/Foo
echo bar >test/bar/Bar
ln -s bar/Bar test/buz
echo long >test/Very-$(LONG)-filename
ln test/Very-$(LONG)-filename \
test/short
.PRECIOUS: tar.%
tar.%: tar-%
cd $(<) && ./configure
$(MAKE) -C $(<)
install -m 0755 $(<)/src/tar $(@)
.PRECIOUS: tar-%
tar-%: tar-%.tar.gz
tar xzf $(<)
.PRECIOUS: tar-%.tar.gz
tar-%.tar.gz:
wget "https://ftp.gnu.org/gnu/tar/$(@)"
.FORCE:
clean:
rm -rf tar-* tar.* test_* test list
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