[enh] postinst : only respond to configure

debian/postinst

@@ -1,5 +1,10 @@
 #!/bin/bash
+#!/bin/sh
+# postinst script for yunohost-config-metronome
 
+set -e
+
+do_configure() {
   TMP=/usr/share/yunohost/yunohost-config/moulinette
 
   if [ ! -d /etc/yunohost ];
@@ -54,3 +59,27 @@ then
       fi
       yunohost app ssowatconf
   fi
+}
+
+# summary of how this script can be called:
+#        * <postinst> `configure' <most-recently-configured-version>
+#        * <old-postinst> `abort-upgrade' <new version>
+#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
+#          <new-version>
+#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
+#          <failed-install-package> <version> `removing'
+#          <conflicting-package> <version>
+# for details, see http://www.debian.org/doc/debian-policy/ or
+# the debian-policy package
+
+case "$1" in
+    configure)
+        do_configure
+    ;;
+    abort-upgrade|abort-remove|abort-deconfigure)
+    ;;
+    *)
+        echo "postinst called with unknown argument \`$1'" >&2
+        exit 1
+    ;;
+esac