Only compile when needed.

Makefile

@@ -18,10 +18,15 @@ Q ?= @
 ####################
 
 DOMAIN ?= example.com
-zone-file:
-	crystal run ./tools/write-zone-file.cr -- $(DOMAIN)
-zone-basic-template-file:
-	crystal run ./tools/write-template-zone-file.cr -- $(DOMAIN)
+build-write-zone-file: tools/write-zone-file.cr
+	$(Q)-([ ! -f bin/write-zone-file ] || [ tools/write-zone-file.cr -nt bin/write-zone-file ]) && shards build write-zone-file
+zone-file: build-write-zone-file
+	$(Q)./bin/write-zone-file $(DOMAIN)
+
+build-write-template-zone-file: tools/write-template-zone-file.cr
+	$(Q)-([ ! -f bin/write-template-zone-file ] || [ tools/write-template-zone-file.cr -nt bin/write-template-zone-file ]) && shards build write-template-zone-file
+zone-basic-template-file: build-write-template-zone-file
+	$(Q)./bin/write-template-zone-file $(DOMAIN)
 
 VERBOSITY ?= 4
 run-client-verbosity:

shard.yml

@@ -26,5 +26,9 @@ targets:
     main: src/main.cr
   dnsmanager-client:
     main: src/client/main.cr
+  write-zone-file:
+    main: tools/write-zone-file.cr
+  write-template-zone-file:
+    main: tools/write-template-zone-file.cr
 
 license: ISC