home-manager: check whether a command is passed

"set -u" treats unset variables as an error, and $1 is unbound when no command is passed.
2018-01-22 00:46:33 -05:00 · 2018-01-22 00:46:33 -05:00 · 21fefbc8f6
parent 38020d9068
commit 21fefbc8f6
1 changed files with 5 additions and 0 deletions
--- a/home-manager/home-manager
+++ b/home-manager/home-manager
@ -337,6 +337,11 @@ done
 # Get rid of the options.
 shift "$((OPTIND-1))"

+if [[ $# -eq 0 ]]; then
+    doHelp >&2
+    exit 1
+fi
+
 cmd="$1"
 shift 1