rocksdb/build_detect_version

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#!/bin/sh
#
# Record the version of the source that we are compiling.
# We keep a record of the git revision in util/version.cc. This source file
# is then built as a regular source file as part of the compilation process.
# One can run "strings executable_filename | grep _build_" to find the version of
# the source that we used to build the executable file.
#
# create git version file
VFILE=util/build_version.cc
# check to see if git is in the path
which git > /dev/null
if [ "$?" = 0 ]; then
git rev-parse HEAD | awk ' BEGIN {print "#include \"build_version.h\""} {print "const char * leveldb_build_git_sha = \"leveldb_build_git_sha:" $0"\";"} END {}' > ${VFILE}
else
echo "git not found"| awk ' BEGIN {print "#include \"build_version.h\""} {print "const char * leveldb_build_git_sha = \"leveldb_build_git_sha:git not found\";"} END {}' > ${VFILE}
fi
date | awk 'BEGIN {} {print "const char * leveldb_build_git_datetime = \"leveldb_build_git_datetime:"$0"\";"} END {} ' >> ${VFILE}
echo "const char * leveldb_build_compile_date = __DATE__;" >> ${VFILE}
echo "const char * leveldb_build_compile_time = __TIME__;" >> ${VFILE}