Keep error semantics intact

Signed-off-by: Markus Thömmes <markusthoemmes@me.com>

cmd/podman/validate/args.go

@@ -27,7 +27,8 @@ func SubCommandExists(cmd *cobra.Command, args []string) error {
 		}
 		return errors.Errorf("unrecognized command `%[1]s %[2]s`\n\nDid you mean this?\n\t%[3]s\n\nTry '%[1]s --help' for more information.", cmd.CommandPath(), args[0], strings.Join(suggestions, "\n\t"))
 	}
-	return cmd.Help()
+	cmd.Help()
+	return errors.Errorf("missing command '%[1]s COMMAND'", cmd.CommandPath())
 }
 
 // IDOrLatestArgs used to validate a nameOrId was provided or the "--latest" flag

test/system/001-basic.bats

@@ -100,7 +100,7 @@ function setup() {
         skip "only applicable on a local run since this requires no endpoint"
     fi
 
-    run_podman --remote
+    run_podman 125 --remote
     is "$output" ".*Usage:" "podman --remote show usage message without running endpoint"
 }
 

test/system/015-help.bats

@@ -143,16 +143,13 @@ function check_help() {
         count=$(expr $count + 1)
     done
 
-    # Any command that takes subcommands, prints its help if called
+    # Any command that takes subcommands, prints its help and errors if called
     # without one.
     dprint "podman $@"
-
-    # Store the output of the actual --help command
-    run_podman "$@" --help
-    local full_help="$output"
-
-    run_podman "$@"
-    is "$output" "$full_help" "'podman $*' without any subcommand - expected help message"
+    run_podman '?' "$@"
+    is "$status" 125 "'podman $*' without any subcommand - exit status"
+    is "$output" ".*Usage:.*Error: missing command '.*$@ COMMAND'" \
+       "'podman $*' without any subcommand - expected error message"
 
     # Assume that 'NoSuchCommand' is not a command
     dprint "podman $@ NoSuchCommand"