1 #!/usr/bin/env bash
2 # Copyright 2010 The Go Authors. All rights reserved.
3 # Use of this source code is governed by a BSD-style
4 # license that can be found in the LICENSE file.
5
6 GOROOT=$(dirname $0)/..
7
8 # If a version file created by -save is available, use it
9 if [ -f "$GOROOT/VERSION" ]; then
10 cat $GOROOT/VERSION
11 exit 0
12 fi
13
14 # Otherwise, if hg doesn't work for whatever reason, fail
15 if [ ! -d "$GOROOT/.hg" ] || ! hg version > /dev/null 2>&1; then
16 echo 'Unable to report version: hg and VERSION file missing' 1>&2
17 echo 'Generate VERSION with `src/version.bash -save` while hg is usable' 1>&2
18 exit 2
19 fi
20
21 # Get numerical revision
22 VERSION=$(hg identify -n 2>/dev/null)
23 if [ $? != 0 ]; then
24 OLD=$(hg identify | sed 1q)
25 VERSION=$(echo $OLD | awk '{print $1}')
26 fi
27
28 # Get branch type
29 BRANCH=release
30 if [ "$(hg identify -b 2>/dev/null)" == "default" ]; then
31 BRANCH=weekly
32 fi
33
34 # Find most recent known release or weekly tag.
35 TAG=$(hg tags |
36 grep $BRANCH |
37 sed 's/:.*//' |
38 sort -rn -k2 |
39 awk -v ver=$VERSION '$2 <= ver && $1~/^(release|weekly)\./ {print $1}' |
40 sed -n 1p)
41
42 if [ "$TAG" != "" ]; then
43 VERSION="$TAG $VERSION"
44 fi
45
46 if [ "$1" = "-save" ]; then
47 echo $VERSION > $GOROOT/VERSION
48 else
49 echo $VERSION
50 fi