Racket: new option to specify network interface for REPL server

In geiser-racket.sh, there's the new option -n, which uses a new
hostname argument accepted by geiser/user's start-geiser function.

3 files changed, 13 insertions, 10 deletions

diff --git a/bin/geiser-racket.sh b/bin/geiser-racket.sh
index 5fdfffe..b3d96e9 100755
--- a/bin/geiser-racket.sh
+++ b/bin/geiser-racket.sh
@@ -9,11 +9,13 @@ exec racket -i -S "$top/racket" -l errortrace -cu "$0" ${1+"$@"}
 (require (lib "cmdline.rkt"))
 
 (define port (make-parameter 0))
+(define host (make-parameter #f (lambda (h) (and (string? h) h))))
 
 (command-line
  "run-racket.sh" (current-command-line-arguments)
  (once-each
+  (("-n" "--hostname") n "Network hostname, or #f for all interfaces" (host n))
   (("-p" "--port") p "Geiser server port" (port (string->number p)))))
 
 (printf "Geiser server running at port ~a~%"
-        ((dynamic-require 'geiser/server 'start-geiser) (port)))
+        ((dynamic-require 'geiser/server 'start-geiser) (port) (host)))
diff --git a/doc/repl.texi b/doc/repl.texi
index 560f3eb..dcc1bd0 100644
--- a/doc/repl.texi
+++ b/doc/repl.texi
@@ -75,11 +75,12 @@ In Racket, you have to use the REPL server that comes with Geiser.  To
 that end, put Geiser's Racket @file{scheme} directory in Racket's
 collection search path and invoke @code{start-geiser} (a procedure in
 the module @code{geiser/server}) somewhere in your program, passing it
-the desired port.  This procedure will start the REPL server in a
-separate thread.  For an example of how to do that, see the script
-@file{bin/geiser-racket.sh} in the source distribution, or, if you've
-compiled Geiser, @file{bin/geiser-racket-noinst} in the build directory,
-or, if you've installed Geiser, @file{geiser-racket} in
+the desired port and, if desired, network interface name.  This
+procedure will start the REPL server in a separate thread.  For an
+example of how to do that, see the script @file{bin/geiser-racket.sh} in
+the source distribution, or, if you've compiled Geiser,
+@file{bin/geiser-racket-noinst} in the build directory, or, if you've
+installed Geiser, @file{geiser-racket} in
 @file{<installation-prefix>/bin}.  These scripts start a new interactive
 Racket that is also running a REPL server (they also load the errortrace
 library to provide better diagnostics, but that's not strictly needed).
diff --git a/scheme/racket/geiser/user.rkt b/scheme/racket/geiser/user.rkt
index e9540b0..f383a46 100644
--- a/scheme/racket/geiser/user.rkt
+++ b/scheme/racket/geiser/user.rkt
@@ -110,18 +110,18 @@
 
 (define server-channel (make-channel))
 
-(define (run-geiser-server port enforce-module-constants)
+(define (run-geiser-server port enforce-module-constants (hostname #f))
   (run-server port
               (lambda (in out)
                 (run-geiser-repl in out enforce-module-constants))
               #f
               void
               (lambda (p _ __)
-                (let ([lsner (tcp-listen p)])
+                (let ([lsner (tcp-listen p 4 #f hostname)])
                   (let-values ([(_ p __ ___) (tcp-addresses lsner #t)])
                     (channel-put server-channel p)
                     lsner)))))
 
-(define (start-geiser (port 0) (enforce-module-constants #f))
-  (thread (lambda () (run-geiser-server port enforce-module-constants)))
+(define (start-geiser (port 0) (hostname #f) (enforce-module-constants #f))
+  (thread (lambda () (run-geiser-server port enforce-module-constants hostname)))
   (channel-get server-channel))