Guile reconnected (but not debuggable (yet))

Or the importance of EOL. Switching to a transaction queue for
communication with the Scheme process means that i had to care about
sending eols in the queries... Guile was waiting for ever reading a
metacommand taking a variable number of arguments. Argh: this has
taken me a few hours -- i'm getting old.

2 files changed, 21 insertions, 20 deletions

diff --git a/scheme/guile/geiser/emacs.scm b/scheme/guile/geiser/emacs.scm
index 54e5d34..9e3d410 100644
--- a/scheme/guile/geiser/emacs.scm
+++ b/scheme/guile/geiser/emacs.scm
@@ -13,6 +13,7 @@
   #:use-module (ice-9 match)
   #:use-module (system repl command)
   #:use-module (system repl error-handling)
+  #:use-module (system repl server)
   #:use-module (geiser evaluation)
   #:use-module ((geiser modules) :renamer (symbol-prefix-proc 'ge:))
   #:use-module ((geiser completion) :renamer (symbol-prefix-proc 'ge:))
@@ -26,8 +27,13 @@
 No-op command used internally by Geiser."
   (values))
 
+(define-meta-command ((geiser-newline geiser) repl)
+  "geiser-newline
+Meta-command used by Geiser to emit a new line."
+  (newline))
+
 (define-meta-command ((geiser-eval geiser) repl (mod form args) . rest)
-  "geiser-eval
+  "geiser-eval module form args ()
 Meta-command used by Geiser to evaluate and compile code."
   (if (null? args)
       (call-with-error-handling
@@ -36,12 +42,17 @@ Meta-command used by Geiser to evaluate and compile code."
         (ge:eval `(,proc ,@args) mod))))
 
 (define-meta-command ((geiser-load-file geiser) repl file)
-  "geiser-load-file
+  "geiser-load-file file
 Meta-command used by Geiser to load and compile files."
   (call-with-error-handling
    (lambda () (ge:compile-file file))))
 
-(define-meta-command ((geiser-newline geiser) repl)
-  "geiser-newline
-Meta-command used by Geiser to emit a new line."
-  (newline))
+
+(define-meta-command ((geiser-start-server geiser) repl)
+  "geiser-start-server
+Meta-command used by Geiser to start a REPL server."
+  (let* ((sock (make-tcp-server-socket #:port 0))
+         (port (sockaddr:port (getsockname sock))))
+    (spawn-server sock)
+    (write (list 'port port))
+    (newline)))
diff --git a/scheme/guile/geiser/evaluation.scm b/scheme/guile/geiser/evaluation.scm
index ef082db..305ccfd 100644
--- a/scheme/guile/geiser/evaluation.scm
+++ b/scheme/guile/geiser/evaluation.scm
@@ -25,20 +25,6 @@
   #:use-module (system vm program)
   #:use-module (ice-9 pretty-print))
 
-(define (handle-error stack . args)
-  (pmatch args
-    ((,key ,subr ,msg ,args . ,rest)
-     (display "Backtrace:\n")
-     (if (stack? stack)
-         (display-backtrace stack (current-output-port)))
-     (newline)
-     (display-error stack (current-output-port) subr msg args rest))
-    (else (display (format "ERROR: ~a, args: ~a" (car args) (cdr args)))))
-  `(error (key . ,(car args))))
-
-(define (write-result result output)
-  (write (list (cons 'result result) (cons 'output output)))
-  (newline))
 
 (define compile-opts '())
 (define compile-file-opts '())
@@ -62,6 +48,10 @@
 
 (ge:set-warnings 'none)
 
+(define (write-result result output)
+  (write (list (cons 'result result) (cons 'output output)))
+  (newline))
+
 (define (call-with-result thunk)
   (letrec* ((result #f)
             (output