ENT-14061: Make the source and package tarballs reproducible#3166
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@cf-bottom Jenkins please :) |
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Two builds of the same source tree now produce byte-identical tarballs, following GNU tar's reproducibility guidance: * Select tar-pax in configure.ac so $(am__tar) emits --format=posix, giving stable, version-independent header encoding for both "make dist" and "make tar-package". * Expand the exported TAR_OPTIONS: --sort=name for stable member order, --numeric-owner / --owner=0 / --group=0 to drop buildslave identity, --mode=go+u,go-w for deterministic permissions, and the --pax-option flags to keep tar's PID out of header names and omit atime/ctime (leaving the archive in the ustar subset). * In dist-hook, normalize directory permissions to 755 and, when SOURCE_DATE_EPOCH is set, clamp every mtime to it. * In tar-package, clamp staged file mtimes to SOURCE_DATE_EPOCH and pass -n to gzip so the gzip header carries no timestamp. Ticket: ENT-14061 Signed-off-by: Lars Erik Wik <lars.erik.wik@northern.tech>
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Alright, I triggered a build: Jenkins: https://ci.cfengine.com/job/pr-pipeline/13895/ Packages: http://buildcache.cfengine.com/packages/testing-pr/jenkins-pr-pipeline-13895/ |
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This makes both the
make distsource tarball and themake tar-packagepackage tarball reproducible:--sort=nameto the exportedTAR_OPTIONSso$(am__tar)emits members in a stable order for both recipes.dist-hook, normalize directory permissions to 755 and, whenSOURCE_DATE_EPOCHis set, clamp every mtime to it.tar-package, clamp staged file mtimes toSOURCE_DATE_EPOCHand pass-nto gzip so the gzip header carries no timestamp.Ticket: ENT-14061
Together: cfengine/buildscripts#2271