cac help: invoke $PAGER when stdin is a terminal

1 files changed, 12 insertions, 2 deletions

diff --git a/cac b/cac
index 08cc820..5762803 100755
--- a/cac
+++ b/cac
@@ -64,12 +64,22 @@ cac() {
 }
 
 #? cac help
-#?    Print this help message.
+#?    Show this help message.
 #?
 __cac_cli__help() {(
+  # test -t expects GNU coreutils
+  if test -t 0 >/dev/null 2>&1; then
+    filter() {
+      $PAGER "$@"
+    }
+  else
+    filter() {
+      cat "$@"
+    }
+  fi
   exec sed < "$0" -n '
     s/^#?\( \(.*\)\)\?/\2/p
-  '
+  ' | filter
 )}
 
 #? cac console SERVERSPEC