#!/bin/sh
+# Copyright (c) The Exim Maintainers 1995 - 2018
+
+set -e
+LC_ALL=C
+export LC_ALL
# Update Exim's version header file.
# Read version information that was generated by a previous run of
# this script, or during the release process.
-if [ -f ./version.sh ]
-then . ./version.sh
-elif [ -f ../src/version.sh ]
-then . ../src/version.sh
-fi
-
-# If this tree is a git working directory, use that to get version information.
-
-if [ -d ../../.git ] || [ "$1" = "release" ]
-then
- # Modify the output of git describe into separate parts for
- # the name "exim" and the release and variant versions.
- # Put a dot in the version number and remove a spurious g.
- set $(git describe --dirty=-XX --match 'exim-4*' |
- sed 's|-| |;s|_|.|;s|[-_]| _|;s|-g|-|')
- # Only update if we need to
- if [ "$2 $3" != "$EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION" ]
- then
- EXIM_RELEASE_VERSION="$2"
- EXIM_VARIANT_VERSION="$3"
- rm -f version.h
- fi
+if [ -f ./version.sh ]; then
+ . ./version.sh
+elif [ -f ../src/version.sh ]; then
+ . ../src/version.sh
+elif [ -d ../../.git ] || [ -f ../../.git ] || [ "$1" = release ]; then
+ # Modify the output of git describe into separate parts for
+ # the name "exim" and the release and variant versions.
+ # Put a dot in the version number and remove a spurious g.
+ if [ "$2" ]
+ then
+ description=$(git describe "$2")
+ else
+ description=$(git describe --dirty=-XX --match 'exim-4*')
+ fi
+ set $(echo "$description" | sed 's/-/ /; s/-g/-/')
+ # Only update if we need to
+ if [ "$2 $3" != "$EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION" ]
+ then
+ EXIM_RELEASE_VERSION="$2"
+ EXIM_VARIANT_VERSION="$3"
+ rm -f version.h
+ fi
+else
+ echo "Cannot determine the release number" >&2
+ exit
fi
# If you are maintaining a patched version of Exim, you can either
# create your own version.sh as part of your release process, or you
# can modify EXIM_VARIANT_VERSION at this point in this script.
-case $EXIM_RELEASE_VERSION in
-'') echo "*** Your copy of Exim lacks any version information."
- exit 1
-esac
+if test -z "$EXIM_RELEASE_VERSION"; then
+ echo "$0: Your copy of Exim lacks any version information." >&2
+ exit 1
+fi
EXIM_COMPILE_NUMBER=$(expr "${EXIM_COMPILE_NUMBER:-0}" + 1)
echo "$EXIM_COMPILE_NUMBER" >cnumber.h
+# Reproducible builds, accept a build timestamp override from environ per
+# <https://reproducible-builds.org/specs/source-date-epoch/>.
+# 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 ]
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
-echo ">>> version $EXIM_RELEASE_VERSION$EXIM_VARIANT_VERSION #$EXIM_COMPILE_NUMBER"
+echo ">>> version $EXIM_RELEASE_VERSION $EXIM_VARIANT_VERSION #$EXIM_COMPILE_NUMBER"
echo
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