Connect -n option to linenoise noninteractive mode.

* parser.c (repl): Set noninteractive mode from noninteractive
option.

* txr.c (help): Mention effect of -n upon listener.

* txr.1: Documented effect of -n/--noninteractive on the
listener.

1 files changed, 16 insertions, 1 deletions

diff --git a/txr.1 b/txr.1
index 31f3d468..60f3bc5f 100644
--- a/txr.1
+++ b/txr.1
@@ -458,7 +458,10 @@ Invoke the interactive \*(TX debugger. See the DEBUGGER section.
 .coIP --noninteractive
 This option affects behavior related to \*(TX's
 .code *std-input*
-stream.  Normally, if this stream is connected to a terminal device, it is
+stream.  It also has a another, unrelated effect, on the
+behavior of the interactive listener; see below.
+
+Normally, if this stream is connected to a terminal device, it is
 automatically marked as having the real-time property when \*(TX starts up (see
 the functions .code stream-set-prop and
 .codn real-time-stream-p ).
@@ -478,6 +481,18 @@ returned by that function has behaviors that are better suited for scanning
 interactive input. A more detailed explanation is given under the description
 of this function.
 
+If the
+.code -n
+option is effect and \*(TX enters into the interactive listener,
+the listener operates in
+.IR "plain mode" .
+The listener reads buffered lines
+from the operating system without any character-based editing features
+or history navigation. In plain mode, no prompts appear and no
+terminal control escape sequences are generated. The only output is
+the results of evaluation, related diagnostic messages, and any output
+generated by the evaluated expressions themselves.
+
 .coIP -v
 Verbose operation. Detailed logging is enabled.