Use rbenv help infrastructure

README.md

@@ -11,12 +11,8 @@ $ git clone https://github.com/chriseppstein/rbenv-each.git
 
 ## Usage
 
-You can get help for the `each` command by passing the `-h` option.
-
 ```
-$ rbenv each -h
-Usage: rbenv each [-v] ...
-       -v Verbose mode. Prints a header for each ruby.
+$ rbenv help each
 ```
 
 Verbose mode will print a header for each ruby so you can distinguish

bin/rbenv-each

@@ -1,30 +1,35 @@
 #!/usr/bin/env bash
+#
+# Summary: Execute a command for each Ruby version
+#
+# Usage: rbenv each [-v] <command> [arg1 arg2...]
+#
+# Executes a command for each Ruby version by setting RBENV_VERSION.
+# Failures are collected and reported at the end.
+#
+#    -v  Verbose mode. Prints a header for each ruby.
+#
 set -e
+[ -n "$RBENV_DEBUG" ] && set -x
 
-verbose=""
-
-usage() {
-  echo "Usage: rbenv each [-v] <command>"
-  echo "       -v Verbose mode. Prints a header for each ruby."
-}
-
-while getopts ':vh' option; do
-  case "$option" in
-  'v') verbose=1 ;;
-  'h') usage; exit 0 ;;
-  '?')
-    usage >&2
-    exit 1
-    ;;
-  esac
-done
-shift $(($OPTIND-1))
+# Provide rbenv completions
+if [ "$1" = "--complete" ]; then
+  echo -v
+  exit
+fi
 
-if [ -z "$1" ]; then
-  usage >&2
-  exit 1
+if [ "$1" = "-v" ]; then
+  verbose=1
+  shift
 fi
 
+case "$1" in
+""  | -* )
+  rbenv-help --usage each >&2
+  exit 1
+  ;;
+esac
+
 GRAY=""
 RED=""
 YELLOW=""