derive structure which avoids multiple execution

[cgilite] / debug.sh

diff --git a/debug.sh b/debug.sh
new file mode 100755 (executable)
index 0000000..259407b
--- /dev/null
+++ b/debug.sh
@@ -0,0 +1,39 @@
+#!/bin/zsh
+
+# Copyright 2014, 2015 Paul Hänsch
+#
+# This file is part of shcgi.
+# 
+# shcgi is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# shcgi is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with shcgi.  If not, see <http://www.gnu.org/licenses/>. 
+
+# put debug options in the local.opts file
+DBG_ENABLED=false
+DBG_FILE=/dev/stderr
+
+# basic functions
+debug() { #change to false to disable debugging
+  if [ "$DBG_ENABLED" = true -a -n "$*" ]; then
+    printf '%s\n' "$*" >>"$DBG_FILE"
+  elif [ "$DBG_ENABLED" = true -a -z "$*" ]; then
+    tee -a "$DBG_FILE"
+  elif [ -z "$*" ]; then
+    cat
+  fi
+}
+
+die() {
+  debug FATAL: "$*"
+  printf '%s\n' "$*" >&2
+  exit 1
+}