Add debug facilities.

4 files changed, 32 insertions, 5 deletions

diff --git a/README.org b/README.org
index 0b7a9bd..13b173f 100644
--- a/README.org
+++ b/README.org
@@ -8,5 +8,7 @@
 - =FERTI_ENVIRONMENT= :: Can be either =development= or =production=.
   Default value is =production=, which is more secure (password
   required everywhere, no debug traces).
+- =FERTI_DEBUG= :: Can be either =true= or =false=.  Default value is
+  =false=.
 - =FERTI_USER= :: User used to log into the web app.
 - =FERTI_PASS= :: Password used to log into the web app.
diff --git a/db/conn.rkt b/db/conn.rkt
index 42a75c0..11abc19 100644
--- a/db/conn.rkt
+++ b/db/conn.rkt
@@ -1,22 +1,27 @@
 #lang racket
 
-(require db)
-
 (provide current-conn
          connect!
          disconnect!
          with-db
          with-tx)
 
+(require db
+         "../debug.rkt")
+
 (define current-conn (make-parameter #f))
 
 (define (connect! #:path [path 'memory])
-  (unless (connection? (current-conn))
-    (current-conn (sqlite3-connect #:database path #:mode 'create))))
+  (if (connection? (current-conn))
+      (debug-log (format "Connection already instantiated: ~a" (current-conn)))
+      (begin
+        (current-conn (sqlite3-connect #:database path #:mode 'create))
+        (debug-log (format "Connection instantiated: ~a" (current-conn))))))
 
 (define (disconnect!)
   (disconnect (current-conn))
-  (current-conn #f))
+  (current-conn #f)
+  (debug-log "Connection disconnected."))
 
 (define-syntax-rule (with-db body ...)
   (begin
diff --git a/debug.rkt b/debug.rkt
new file mode 100644
index 0000000..0d93557
--- /dev/null
+++ b/debug.rkt
@@ -0,0 +1,11 @@
+#lang racket
+
+(provide debug-enabled?
+         debug-log)
+
+(define debug-enabled?
+  (make-parameter (let ([env (getenv "FERTI_DEBUG")]) (and env (equal? env "true")))))
+
+(define (debug-log message)
+  (when (debug-enabled?)
+    (displayln message)))
diff --git a/run_development.sh b/run_development.sh
new file mode 100755
index 0000000..ee49082
--- /dev/null
+++ b/run_development.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+export FERTI_ENV=development
+export FERTI_DEBUG=true
+
+export FERTI_USER=admin
+export FERTI_PASS=admin
+
+racket main.rkt