add template for script that only runs if the file exists

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

core/__cdist_run_if_exists

@@ -0,0 +1,69 @@
+#!/bin/sh
+#
+# 2010-2011 Nico Schottelius (nico-cdist at schottelius.org)
+# 2011 Steven Armstrong (steven-cdist at armstrong.cc)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+# Exec the code for the given object locally and remote
+#
+
+__cdist_object_code_run()
+{
+   set -x
+   __cdist_object_code_run_object="$1"; shift
+
+   # Code local
+   export __cdist_out_object_dir="$__cdist_out_object_dir"
+   __cdist_code_run "$__cdist_object_code_run_object" "${__cdist_name_gencode_local}"
+
+   # Code remote
+   #__cdist_run_remote "__cdist_code_run" \
+   #   "$__cdist_object_code_run_object" "${__cdist_name_gencode_remote}"
+   __cdist_run_remote "echo" "__cdist_code_run" \
+      "$__cdist_object_code_run_object" "${__cdist_name_gencode_remote}; exit 1"
+
+
+   # [ $# -eq 2 ] || __cdist_usage "<object> <type>"
+
+   __cdist_object_code_run_object="$1"; shift
+   __cdist_code_type="$1"; shift
+
+   if [ ! -d "$(__cdist_object_dir "$__cdist_object_code_run_object")" ]; then
+      __cdist_exit_err "Object undefined"
+   fi  
+
+   __cdist_code="$(__cdist_object_code "$__cdist_object_code_run_object" "${__cdist_code_type}")"
+
+   __cdist_echo info "Checking code-${__cdist_code_type}"
+
+   if [ -e "$__cdist_code" ]; then
+      if [ -f "$__cdist_code" ]; then
+         if [ -x "$__cdist_code" ]; then
+            __cdist_echo info "Executing code-${__cdist_code_type}"
+            __cdist_run_shell "$__cdist_code"
+         else
+            __cdist_exit_err "$__cdist_code exists, but is not executable."
+         fi
+      else
+         __cdist_exit_err "$__cdist_code exists, but is not a file."
+      fi
+   fi
+
+   # Exit gracefully if nothing is todo
+   true
+}