crocparty/vendored/sdl/build-scripts/showrev.sh

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#!/bin/sh
#
# Print the current source revision, if available
SDL_ROOT=$(dirname $0)/..
cd $SDL_ROOT
if [ -e ./VERSION.txt ]; then
cat ./VERSION.txt
exit 0
fi
major=$(sed -ne 's/^#define SDL_MAJOR_VERSION *//p' include/SDL_version.h)
minor=$(sed -ne 's/^#define SDL_MINOR_VERSION *//p' include/SDL_version.h)
micro=$(sed -ne 's/^#define SDL_PATCHLEVEL *//p' include/SDL_version.h)
version="${major}.${minor}.${micro}"
if [ -x "$(command -v git)" ]; then
rev="$(git describe --tags --long 2>/dev/null)"
if [ -n "$rev" ]; then
# e.g. release-2.24.0-542-g96361fc47
# or release-2.24.1-5-g36b987dab
# or prerelease-2.23.2-0-gcb46e1b3f
echo "$rev"
exit 0
fi
rev="$(git describe --always --tags --long 2>/dev/null)"
if [ -n "$rev" ]; then
# Just a truncated sha1, e.g. 96361fc47.
# Turn it into e.g. 2.25.0-g96361fc47
echo "${version}-g${rev}"
exit 0
fi
fi
if [ -x "$(command -v p4)" ]; then
rev="$(p4 changes -m1 ./...\#have 2>/dev/null| awk '{print $2}')"
if [ $? = 0 ]; then
# e.g. 2.25.0-p7511446
echo "${version}-p${rev}"
exit 0
fi
fi
# best we can do
echo "${version}-no-vcs"
exit 0