More work on execution

examples/uptime.scm

@@ -7,6 +7,9 @@
 (define uptime (task #:name "uptime" #:action (cut remote-cmd <> "uptime" #:return car)))
 
 (define flow (workflow
-              (step #:action uptime #:target "root@limiting-factor" #:continue-on-err? #t)))
+              (execute uptime "limiting-factor" '(#:sudo #t))))
 
 (define resolver (load-inventory "examples/inventory.scm"))
+
+;; IDEA: have load-inventory! set an *inventory* parameter and remove the execute methods
+;; that take a <host-resolver> argument, making this implicit.