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#!/bin/sh
set -eu
SOURCE_DIR=$1
MAJOR=$2
MINOR=$3
PATCH=$4
VER="$MAJOR.$MINOR.$PATCH"
update() {
file="$SOURCE_DIR/$1"
expr="$2"
sed -e "$expr" "$file" > "$file.updated-version"
if diff "$file" "$file.updated-version"; then
rm "$file.updated-version"
else
# use cat > and rm instead of move to keep file permissions
cat "$file.updated-version" > "$file"
rm "$file.updated-version"
fi
}
update 'configure.ac' 's/AC_INIT(\[tox\], \[.*\])/AC_INIT([tox], ['$VER'])/'
update 'toxcore/tox.api.h' 's/\(const VERSION_MAJOR *= \).*;/\1'$MAJOR';/'
update 'toxcore/tox.api.h' 's/\(const VERSION_MINOR *= \).*;/\1'$MINOR';/'
update 'toxcore/tox.api.h' 's/\(const VERSION_PATCH *= \).*;/\1'$PATCH';/'
update 'CMakeLists.txt' 's/\(PROJECT_VERSION_MAJOR "\).*"/\1'$MAJOR'"/'
update 'CMakeLists.txt' 's/\(PROJECT_VERSION_MINOR "\).*"/\1'$MINOR'"/'
update 'CMakeLists.txt' 's/\(PROJECT_VERSION_PATCH "\).*"/\1'$PATCH'"/'
#
# calculating the SO version
#
# The SO version reflects changes in the ABI compatibility of the library [1].
# The general convention on this is that the SO version is a monotonically
# increasing number. The major version reflects breaking changes and the minor
# number reflect non-breaking updates [2].
#
# The SO version for tox libraries consists of two parts: `A.B`.
# - incrementing A reflects an ABI breaking change.
# - incrementing B reflects a non-ABI-breaking update. B is set to 0 when A is incremented.
#
# As the tox versioning scheme directly reflects ABI compatibility, we can use it
# to construct the SO version.
#
# In the `0.y.z` release cycle, breaking changes are allowed in every increment of `y`,
# so we can build the SO version just by taking `y.z`.
# In the `x.y.z` release cycle with `x > 0` the SO version must be calculated by taking
# the major of the tox version and add a hardcoded number that is the last A of the 0.y.z
# release cycle.
#
# References:
#
# [1]: https://autotools.io/libtool/version.html
# [2]: http://www.ibm.com/developerworks/linux/library/l-shlibs/index.html#N1006E
#
# the last major version number from the 0.x release cycle
# this must be constant starting from the 1.0 release
LAST_SOMAJOR=2
if [ $MAJOR -eq 0 ]; then
SOMAJOR=$MINOR
SOMINOR=$PATCH
# update lastmajor above
update 'other/version-sync' 's/^\(LAST_SOMAJOR=\).*/\1'$SOMAJOR'/'
else
SOMAJOR=$(expr $MAJOR + $LAST_SOMAJOR)
SOMINOR=$MINOR
fi
#
# libtool has a quite cryptic implementation of the versioning system, which also
# changes between systems, see https://github.com/lxde/lxqt/issues/488#issuecomment-238084222
#
# .so library version, following the libtool scheme:
#
# current:revision:age
#
# current: increment if interfaces have been added, removed or changed
# revision: increment if source code has changed, set to zero if current is
# incremented
# age: increment if interfaces have been added, set to zero if
# interfaces have been removed or changed
#
# For a full reference see:
# https://www.gnu.org/software/libtool/manual/libtool.html#Updating-version-info
#
# Passing such a version string to libtool will generate the following version number
# on the library binary file on GNU/Linux:
#
# (current - age).(age).(revision)
#
# We do not want to use a separate version numbering for the library because the package versioning is equally good:
#
# Semver non-breaking: 0.y.(z+1) or x.(y+1).0:
#
# This would mean to increment current and age, which leave the major of SOVERSION the same.
# Revision is incremented.
#
# Semver breaking: 0.(y+1).0 or (x+1).0.0:
#
# This would mean to increment current, set age and revision to zero.
#
# Thus to make libtool use our version, we have to pass (major + minor):patch:minor as current:revision:age to get:
#
# (current - age).(age).(revision)
# <=> (major + minor - minor).minor.patch
# <=> major.minor.patch
#
if [ $MAJOR -eq 0 ]; then
LIBTOOL_CURRENT=$(expr $SOMAJOR + $SOMINOR)
LIBTOOL_AGE=$SOMINOR
LIBTOOL_REVISION=0
else
LIBTOOL_CURRENT=$(expr $SOMAJOR + $SOMINOR)
LIBTOOL_AGE=$SOMINOR
LIBTOOL_REVISION=$PATCH
fi
update 'so.version' 's/^\(CURRENT=\).*/\1'$LIBTOOL_CURRENT'/'
update 'so.version' 's/^\(AGE=\).*/\1'$LIBTOOL_AGE'/'
update 'so.version' 's/^\(REVISION=\).*/\1'$LIBTOOL_REVISION'/'
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