From d529cb259231d98635d0adacde7d05d04f545eba Mon Sep 17 00:00:00 2001
From: Pieter Lexis <pieter.lexis@powerdns.com>
Date: Tue, 15 Dec 2015 16:21:33 +0100
Subject: [PATCH] Set version numbers correctly on releases

---
 build-aux/gen-version | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/build-aux/gen-version b/build-aux/gen-version
index d761c566ab..cec0e70049 100755
--- a/build-aux/gen-version
+++ b/build-aux/gen-version
@@ -1,6 +1,25 @@
 #!/bin/sh
 VERSION="unknown"
 
+DIRTY=""
+git status | grep -q clean || DIRTY='.dirty'
+
+# Special environment variable to signal that we are building a release, as this
+# has condequenses for the version number.
+if [ "${IS_RELEASE}" = "YES" ]; then
+  TAG="$(git describe --tags --exact-match 2> /dev/null | cut -d- -f 2-)"
+  if [ -n "${TAG}" ]; then
+    # We're on a tag
+    echo "${TAG}${DIRTY}"
+    exit 0
+  fi
+  echo 'This is not a tag, either tag this commit or do not set $IS_RELEASE' >&2
+  exit 1
+fi
+
+#
+# Generate the version number based on the branch
+#
 if [ ! -z "$(git rev-parse --abbrev-ref HEAD 2> /dev/null)" ]; then
   if $(git rev-parse --abbrev-ref HEAD | grep -q 'rel/'); then
     REL_TYPE="$(git rev-parse --abbrev-ref HEAD | cut -d/ -f 2 | cut -d- -f 1)"
@@ -9,7 +28,6 @@ if [ ! -z "$(git rev-parse --abbrev-ref HEAD 2> /dev/null)" ]; then
     GIT_VERSION=$(git show --no-patch --format=format:%h HEAD)
     BRANCH=".$(git rev-parse --abbrev-ref HEAD | perl -p -e 's/-//g;')"
     [ "${BRANCH}" = ".master" ] && BRANCH=''
-    git status | grep -q clean || DIRTY='.dirty'
     VERSION="0.0${BRANCH}.${PDNS_BUILD_NUMBER}g${GIT_VERSION}${DIRTY}"
   fi
   echo "$VERSION" > .version
-- 
2.47.2