Add option to fail, if remote cmd fails

docs/ceres.1.md

@@ -381,6 +381,9 @@ The *instances* modules interacts with instances in the environment selected by
   --no-progress-bar
   : Do not show progress bar during command execution. This is useful for non-interactive sessions.
 
+  --fail-on-fail
+  : Exits with code != 1 if any remote command fails
+
   -p, --public-ip
   : Use public IP address of instance
 

docs/man1/ceres.1

@@ -493,6 +493,9 @@ Sets remote login name
 Do not show progress bar during command execution.
 This is useful for non-interactive sessions.
 .TP
+.B \[en]fail-on-fail
+Exits with code != 1 if any remote command fails
+.TP
 .B -p, \[en]public-ip
 Use public IP address of instance
 .TP

src/modules/instances/run.rs

@@ -42,6 +42,11 @@ impl Module for SubModule {
                     .long("no-progress-bar")
                     .help("Do not show progressbar during command execution"),
             )
+            .arg(
+                Arg::with_name("fail-on-fail")
+                    .long("fail-on-fail")
+                    .help("Exits with code != 1 if any remote command fails"),
+            )
             .arg(
                 Arg::with_name("public-ip")
                     .short("p")
@@ -106,6 +111,7 @@ fn do_call(args: &ArgMatches, run_config: &RunConfig, config: &Config) -> Result
     );
 
     let progress_bar = !args.is_present("no-progress-bar");
+    let fail_on_fail = args.is_present("fail-on-fail");
 
     let show_all = args.is_present("show-all");
     let output_type = args.value_of("output").unwrap() // Safe
@@ -127,6 +133,10 @@ fn do_call(args: &ArgMatches, run_config: &RunConfig, config: &Config) -> Result
     run::output_results(output_type, show_all, results.as_slice())
         .chain_err(|| ErrorKind::ModuleFailed(NAME.to_owned()))?;
 
+    if fail_on_fail && results.iter().any(|r| !r.exit_status.success()) {
+        return Err(Error::from_kind(ErrorKind::ModuleFailed(NAME.to_owned())));
+    }
+
     Ok(())
 }