Introduces kickstart.suppress_error function

docs/kickstart/suppress_error.md

@@ -0,0 +1,15 @@
+# kickstart.suppress_error command to run
+Run the command with stder outputing to /dev/null.
+Inform it is about to run.
+
+When debug flag is enable, does not redirect stderr to help debugging.
+Returns the command result.
+
+### Example
+
+```bash
+$ kickstart.suppress_error dpkg -s pkg-that-does-not-exist | grep 'Status:'
+Running "dpkg -s pkg-that-does-not-exist"
+```
+
+If there was an error executing `dpkg`, it will not show up on the console unless the debugg flag is enabled.

kickstart/recipes/kickstart.sh

@@ -22,6 +22,16 @@ kickstart.mute() {
   return $?
 }
 
+kickstart.suppress_error() {
+  kickstart.info "Running \"$*\""
+  if kickstart.debugging; then
+    "$@"
+  else
+    "$@" 2>/dev/null
+  fi
+  return $?
+}
+
 kickstart.command_exists() {
   kickstart.mute which "$1"
 }