ci: Barf on unset umask

Since it's just not a sane thing to do and will cause various
failures in our test suite.

diff --git a/ci/build.sh b/ci/build.sh
index 4ff6eaa53817172a9938fa19cd3a6ae3b6538733..2afcd0188c8905a70eccf7be274644338c5b282d 100755 (executable)
--- a/ci/build.sh
+++ b/ci/build.sh
@@ -6,6 +6,11 @@ set -xeuo pipefail
 dn=$(dirname $0)
 . ${dn}/libbuild.sh
 
+if [ `umask` = 0000 ]; then
+  echo 'Your umask is broken, please use e.g. `umask 0022`' 1>&2
+  exit 1
+fi
+
 ${dn}/installdeps.sh
 
 # Default libcurl on by default in fedora unless libsoup is enabled