From 99db62631519918663f4754f93ebf6bba7ddd6a8 Mon Sep 17 00:00:00 2001
From: Masaya Tojo <masaya@tojo.tokyo>
Date: Fri, 10 Sep 2021 23:26:15 +0900
Subject: monitoring: Change heartbeat procedure to syntax.

---
 configure.ac              | 2 +-
 guix.scm                  | 2 +-
 tojo-tokyo/monitoring.scm | 8 ++++++--
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index 757ddaa..8dfe068 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([guile-tojo-tokyo-monitoring], [0.1.0])
+AC_INIT([guile-tojo-tokyo-monitoring], [0.1.1])
 AC_CONFIG_SRCDIR([tojo-tokyo/monitoring.scm])
 AC_CONFIG_AUX_DIR([build-aux])
 AM_INIT_AUTOMAKE([-Wall -Werror foreign])
diff --git a/guix.scm b/guix.scm
index d8c45aa..5f4d6d1 100644
--- a/guix.scm
+++ b/guix.scm
@@ -29,7 +29,7 @@
 (define guile-tojo-tokyo-monitoring
   (package
     (name "guile-tojo-tokyo-monitoring")
-    (version "0.1.0")
+    (version "0.1.1")
     (source (string-append (getcwd) "/guile-tojo-tokyo-monitoring-" version ".tar.gz"))
     (build-system gnu-build-system)
     (native-inputs
diff --git a/tojo-tokyo/monitoring.scm b/tojo-tokyo/monitoring.scm
index ad5d34e..7d55dda 100644
--- a/tojo-tokyo/monitoring.scm
+++ b/tojo-tokyo/monitoring.scm
@@ -55,5 +55,9 @@
                         (string=? (substring fs 0 5) "/dev/"))))
                (df))))
 
-(define-public (heartbeat)
-  (http-request (current-heartbeat-url)))
+(define-syntax-rule (heartbeat ((p? body ...) ...))
+  (let ((heartbeat-cancel? #f))
+    (when p? body ... (set! heartbeat-cancel? #t))) ...
+    (unless heartbeat-cancel?
+      (http-request (current-heartbeat-url))))
+(export-syntax heartbeat)
-- 
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