Get NeonVM version from go.mod in scripts (#62)

#52 (comment)

scripts-common.sh

@@ -41,6 +41,13 @@ git_info () {
         sed -e "s:':\":g"
 }
 
+# Usage: NEONVM_VERSION="$(neonvm_version)"
+#
+# Fetches the version of NeonVM we're using as a dependency, directly from go.mod.
+neonvm_version () {
+    go list -m -f '{{ .Version }}' github.com/neondatabase/neonvm
+}
+
 # Usage: VAR_NAME="$(get_var VAR_NAME DEFAULT_VALUE)"
 #
 # Helper function that

scripts/download-deployments.sh

@@ -8,6 +8,8 @@ set -eu -o pipefail
 cd -P -- "$(dirname -- "$0")"
 cd .. # but all of the references are to things in the upper directory
 
+source './scripts-common.sh'
+
 echo "downloading 'deploy/flannel.yaml'..."
 curl -sS https://raw.githubusercontent.com/flannel-io/flannel/v0.19.2/Documentation/kube-flannel.yml \
     -o deploy/flannel.yaml
@@ -18,5 +20,5 @@ echo "downloading 'multus-daemonset.yaml'..."
 curl -sS https://raw.githubusercontent.com/k8snetworkplumbingwg/multus-cni/master/deployments/multus-daemonset.yml \
     -o deploy/multus-daemonset.yaml
 echo "downloading 'neonvm.yaml'..."
-curl -sSL https://github.com/neondatabase/neonvm/releases/download/v0.4.6/neonvm.yaml \
+curl -sSL https://github.com/neondatabase/neonvm/releases/download/$(neonvm_version)/neonvm.yaml \
     -o deploy/neonvm.yaml

vm_image/build.sh

@@ -17,7 +17,7 @@ source '../scripts-common.sh'
 
 NEONVM_BUILDER_PATH='neonvm-builder'
 NEONVM_REPO='https://github.com/neondatabase/neonvm'
-NEONVM_VERSION='v0.4.6'
+NEONVM_VERSION="$(neonvm_version)"
 
 if [ -e "$NEONVM_BUILDER_PATH" ]; then
     echo "Skipping downloading NeonVM vm-builder because '$NEONVM_BUILDER_PATH' already exists"