ci: only setup git/gpg on master builds

ci/deploy.sh

@@ -5,12 +5,11 @@ set -eu -o pipefail # Exit with nonzero exit code if anything fails
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"
 
 source ${DIR}/lib/travis-functions.sh
-source ${DIR}/lib/setup-git.sh
 
 nix-build --quiet release.nix
 
 if ! is-automatic-update; then
-  bash $DIR/lint.sh
+  source $DIR/lint.sh
 fi
 
 set -x
@@ -18,8 +17,11 @@ set -x
 result/bin/nur update
 nix-build
 
+# Move everything below to a different job
 dont-continue-on-pull-requests
 
+source ${DIR}/lib/setup-git.sh
+
 git clone git@github.com:nix-community/nur-combined
 
 result/bin/nur combine \