X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/be92b80c645837095fd47f1334502a7c4ec41c93..0d68983b8b7c2040e81090f1d5aa8d2c4043eab3:/src/scripts/reversion?ds=inline diff --git a/src/scripts/reversion b/src/scripts/reversion index 2cf3277fc..45755c084 100755 --- a/src/scripts/reversion +++ b/src/scripts/reversion @@ -1,4 +1,5 @@ #!/bin/sh +# Copyright (c) The Exim Maintainers 2016 set -e LC_ALL=C @@ -70,10 +71,41 @@ EXIM_COMPILE_NUMBER=$(expr "${EXIM_COMPILE_NUMBER:-0}" + 1) echo "$EXIM_COMPILE_NUMBER" >cnumber.h +# Reproducible builds, accept a build timestamp override from environ per +# . +# We require a fairly modern date(1) command here, which is not portable +# to some of the systems Exim is built on. That's okay, because the scenarios +# are: +# 1) Local postmaster building, not using $SOURCE_DATE_EPOCH, doesn't matter +# 2) Packaging folks who don't care about reproducible builds +# 3) Packaging folks who care but are using systems where date Just Works +# 3) Packaging folks who care and can put a modern date(1) in $PATH +# 4) Packaging folks who care and can supply us with a clean patch to support +# their requirements +# 5) Packaging folks who care but won't do any work to support their strange +# old systems and want us to do the work for them. We don't care either, +# they're SOL and have to live without reproducible builds. +# +exim_build_date_override='' +if [ ".${SOURCE_DATE_EPOCH:-}" != "." ]; then + fmt='+%d-%b-%Y %H:%M:%S' + # Non-reproducible, we use __DATE__ and __TIME__ in C, which respect timezone + # (think localtime, not gmtime); for reproduction between systems, UTC makes + # more sense and the examples available use UTC without explicitly mandating + # it. I think that we can switch behavior and use UTC for reproducible + # builds without it causing any problems: nothing really cares about timezone. + # GNU date: "date -d @TS" + # BSD date: "date -r TS" + exim_build_date_override="$(date -u -d "@${SOURCE_DATE_EPOCH}" "$fmt" 2>/dev/null | date -u -r "${SOURCE_DATE_EPOCH}" "$fmt" 2>/dev/null)" +fi + ( echo '# automatically generated file - see ../scripts/reversion' echo EXIM_RELEASE_VERSION='"'"$EXIM_RELEASE_VERSION"'"' echo EXIM_VARIANT_VERSION='"'"$EXIM_VARIANT_VERSION"'"' echo EXIM_COMPILE_NUMBER='"'"$EXIM_COMPILE_NUMBER"'"' + if [ ".${exim_build_date_override:-}" != "." ]; then + echo EXIM_BUILD_DATE_OVERRIDE='"'"${exim_build_date_override}"'"' + fi ) >version.sh if [ ! -f version.h ] @@ -82,6 +114,9 @@ then echo '#define EXIM_RELEASE_VERSION "'"$EXIM_RELEASE_VERSION"'"' echo '#define EXIM_VARIANT_VERSION "'"$EXIM_VARIANT_VERSION"'"' echo '#define EXIM_VERSION_STR EXIM_RELEASE_VERSION EXIM_VARIANT_VERSION' + if [ ".${exim_build_date_override:-}" != "." ]; then + echo '#define EXIM_BUILD_DATE_OVERRIDE "'"${exim_build_date_override}"'"' + fi ) >version.h fi