--- /dev/null
+#!/bin/sh
+# Print additional version information for non-release trees.
+
+usage() {
+ echo "Usage: $0 [srctree]" >&2
+ exit 1
+}
+
+cd "${1:-.}" || usage
+
+# Check for git and a git repo.
+if head=`git rev-parse --verify HEAD 2>/dev/null`; then
+ # Do we have an untagged version?
+ if git name-rev --tags HEAD | grep -E '^HEAD[[:space:]]+(.*~[0-9]*|undefined)$' > /dev/null; then
+ if tag=`git describe 2>/dev/null`; then
+ echo $tag | awk -F- '{printf("-%05d-%s", $(NF-1),$(NF))}'
+ fi
+ fi
+
+ # Are there uncommitted changes?
+ git update-index --refresh --unmerged > /dev/null
+ 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 '^Revision'`; then
+ rev=`echo $rev | awk '{print $NF}'`
+ changes=`svn status 2>/dev/null | grep '^[AMD]' | wc -l`
+
+ # Are there uncommitted changes?
+ if [ $changes != 0 ]; then
+ printf -- '-svn%s%s%s' "$rev" -dirty "$changes"
+ else
+ printf -- '-svn%s' "$rev"
+ fi
+
+ # All done with svn
+ exit
+fi
