acrn-kernel/scripts/setlocalversion

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#!/bin/sh
#
# This scripts adds local version information from the version
# control systems git, mercurial (hg) and subversion (svn).
#
# If something goes wrong, send a mail the kernel build mailinglist
# (see MAINTAINERS) and CC Nico Schottelius
# <nico-linuxsetlocalversion -at- schottelius.org>.
#
#
usage() {
echo "Usage: $0 [srctree]" >&2
exit 1
}
cd "${1:-.}" || usage
# Check for git and a git repo.
if head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
# If we are at a tagged commit (like "v2.6.30-rc6"), we ignore it,
# because this version is defined in the top level Makefile.
if [ -z "`git describe --exact-match 2>/dev/null`" ]; then
# If we are past a tagged commit (like "v2.6.30-rc5-302-g72357d5"),
# we pretty print it.
if atag="`git describe 2>/dev/null`"; then
echo "$atag" | awk -F- '{printf("-%05d-%s", $(NF-1),$(NF))}'
# If we don't have a tag at all we print -g{commitish}.
else
printf '%s%s' -g $head
fi
fi
# Is this git on svn?
if git config --get svn-remote.svn.url >/dev/null; then
printf -- '-svn%s' "`git svn find-rev $head`"
fi
# Update index only on r/w media
[ -w . ] && git update-index --refresh --unmerged > /dev/null
# Check for uncommitted changes
if git diff-index --name-only HEAD | grep -v "^scripts/package" \
| read dummy; then
printf '%s' -dirty
fi
# All done with git
exit
fi
# Check for mercurial and a mercurial repo.
if hgid=`hg id 2>/dev/null`; then
tag=`printf '%s' "$hgid" | cut -d' ' -f2`
# Do we have an untagged version?
if [ -z "$tag" -o "$tag" = tip ]; then
id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`
printf '%s%s' -hg "$id"
fi
# Are there uncommitted changes?
# These are represented by + after the changeset id.
case "$hgid" in
*+|*+\ *) printf '%s' -dirty ;;
esac
# All done with mercurial
exit
fi
# Check for svn and a svn repo.
if rev=`svn info 2>/dev/null | grep '^Last Changed Rev'`; then
rev=`echo $rev | awk '{print $NF}'`
printf -- '-svn%s' "$rev"
# All done with svn
exit
fi