setlocalversion: do not describe if there is nothing to describe
[safe/jmp/linux-2.6] / scripts / setlocalversion
1 #!/bin/sh
2 # Print additional version information for non-release trees.
3
4 usage() {
5         echo "Usage: $0 [srctree]" >&2
6         exit 1
7 }
8
9 cd "${1:-.}" || usage
10
11 # Check for git and a git repo.
12 if head=`git rev-parse --verify HEAD 2>/dev/null`; then
13         # Do we have an untagged version?
14         if git name-rev --tags HEAD | grep -E '^HEAD[[:space:]]+(.*~[0-9]*|undefined)$' > /dev/null; then
15                 if tag=`git describe 2>/dev/null`; then
16                         echo $tag | awk -F- '{printf("-%05d-%s", $(NF-1),$(NF))}'
17                 fi
18         fi
19
20         # Are there uncommitted changes?
21         git update-index --refresh --unmerged > /dev/null
22         if git diff-index --name-only HEAD | grep -v "^scripts/package" \
23             | read dummy; then
24                 printf '%s' -dirty
25         fi
26
27         # All done with git
28         exit
29 fi
30
31 # Check for mercurial and a mercurial repo.
32 if hgid=`hg id 2>/dev/null`; then
33         tag=`printf '%s' "$hgid" | cut -d' ' -f2`
34
35         # Do we have an untagged version?
36         if [ -z "$tag" -o "$tag" = tip ]; then
37                 id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`
38                 printf '%s%s' -hg "$id"
39         fi
40
41         # Are there uncommitted changes?
42         # These are represented by + after the changeset id.
43         case "$hgid" in
44                 *+|*+\ *) printf '%s' -dirty ;;
45         esac
46
47         # All done with mercurial
48         exit
49 fi
50
51 # Check for svn and a svn repo.
52 if rev=`svn info 2>/dev/null | grep '^Revision'`; then
53         rev=`echo $rev | awk '{print $NF}'`
54         changes=`svn status 2>/dev/null | grep '^[AMD]' | wc -l`
55
56         # Are there uncommitted changes?
57         if [ $changes != 0 ]; then
58                 printf -- '-svn%s%s%s' "$rev" -dirty "$changes"
59         else
60                 printf -- '-svn%s' "$rev"
61         fi
62
63         # All done with svn
64         exit
65 fi