Tidy up error handling

scripts/exec_on_targets.ab

@@ -1,9 +1,10 @@
-import { input, lines } from "std"
+import { input, lines, exit } from "std"
 
 let cmd = input("Enter the command to run: ")
 
 let x = $cat "./targets.yaml" | grep "ws://"$ failed {
     echo "[{status}] Failed to read file"
+    exit(1)
 }
 
 let attempted = 0
@@ -12,14 +13,14 @@ let succeeded = 0
 loop index, line in lines(x) {
     let ip = $echo {line} | cut -b 8- | rev | cut -b 6- | rev$ failed {
         echo "[{status}] failed to extract ip from {line}"
+        continue
     }
     echo "Running on target {index} at {ip}"
     attempted = attempted + 1
     let result = $ssh "-oPreferredAuthentications publickey" "root@{ip}" {cmd}$ failed {
-        succeeded = succeeded - 1
         echo "[{status}] failed to run command on {ip}"
+        continue
     }
-
     succeeded = succeeded + 1
     echo result
 }