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-rwxr-xr-xsrc/version.bash50
1 files changed, 50 insertions, 0 deletions
diff --git a/src/version.bash b/src/version.bash
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index 000000000..fc899e2e3
--- /dev/null
+++ b/src/version.bash
@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+# Copyright 2010 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+GOROOT=$(dirname $0)/..
+
+# If a version file created by -save is available, use it
+if [ -f "$GOROOT/VERSION" ]; then
+ cat $GOROOT/VERSION
+ exit 0
+fi
+
+# Otherwise, if hg doesn't work for whatever reason, fail
+if [ ! -d "$GOROOT/.hg" ] || ! hg version > /dev/null 2>&1; then
+ echo 'Unable to report version: hg and VERSION file missing' 1>&2
+ echo 'Generate VERSION with `src/version.bash -save` while hg is usable' 1>&2
+ exit 2
+fi
+
+# Get numerical revision
+VERSION=$(hg identify -n 2>/dev/null)
+if [ $? != 0 ]; then
+ OLD=$(hg identify | sed 1q)
+ VERSION=$(echo $OLD | awk '{print $1}')
+fi
+
+# Get branch type
+BRANCH=release
+if [ "$(hg identify -b 2>/dev/null)" == "default" ]; then
+ BRANCH=weekly
+fi
+
+# Find most recent known release or weekly tag.
+TAG=$(hg tags |
+ grep $BRANCH |
+ sed 's/:.*//' |
+ sort -rn -k2 |
+ awk -v ver=$VERSION '$2 <= ver && $1~/^(release|weekly)\./ {print $1}' |
+ sed -n 1p)
+
+if [ "$TAG" != "" ]; then
+ VERSION="$TAG $VERSION"
+fi
+
+if [ "$1" = "-save" ]; then
+ echo $VERSION > $GOROOT/VERSION
+else
+ echo $VERSION
+fi