Sync apply-version.sh: apply go.mod pins declared in .acap.json

ci/apply-version.sh

@@ -43,11 +43,20 @@ for ((i = 0; i < pin_count; i++)); do
 	arg=$(cfg ".pins[$i].arg")
 	prefix=$(cfg ".pins[$i].prefix // empty")
 	sha_url=$(cfg ".pins[$i].sha256Url // empty")
+	gomodule=$(cfg ".pins[$i].goModule // empty")
 	[ -f "$file" ] || {
 		echo "pin target missing: $file" >&2
 		continue
 	}
 
+	# A go.mod pin has no ARG to substitute, and go refuses a bare "0.77.1", so
+	# the declared prefix has to be applied here.
+	if [ -n "$gomodule" ]; then
+		(cd "$(dirname "$file")" && go get "${gomodule}@${prefix}${UPSTREAM:-$VERSION}" && go mod tidy)
+		echo "go module ${gomodule}@${prefix}${UPSTREAM:-$VERSION} -> $file"
+		continue
+	fi
+
 	if [ -n "$sha_url" ]; then
 		# Checksum pins track the version pin, so the tarball is fetched and
 		# hashed rather than substituted.