Add sudoers element

This element allows injecting sudoers configuration into an image.

Author: markgoddard

elements/sudoers/README.rst

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+=======
+sudoers
+=======
+
+This element allows for injecting sudoers configuration into an image.
+
+Environment Variables
+---------------------
+
+DIB_SUDOERS_FILENAME
+  :Required: No
+  :Default: dib
+  :Description: Name of the sudoers file in /etc/sudoers.d/
+
+DIB_SUDOERS_CONFIG
+  :Required: Yes
+  :Default: None
+  :Description: Sudoers configuration to inject

elements/sudoers/element-deps

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+package-installs

elements/sudoers/environment.d/sudoers

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+export DIB_SUDOERS_FILENAME=${DIB_SUDOERS_FILENAME:-dib}
+export DIB_SUDOERS_CONFIG=${DIB_SUDOERS_CONFIG:?Please set DIB_SUDOERS_CONFIG}

elements/sudoers/install.d/50-sudoers

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+#!/bin/bash
+
+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -eu
+set -o pipefail
+
+echo "${DIB_SUDOERS_CONFIG}" > /etc/sudoers.d/${DIB_SUDOERS_FILENAME}
+chmod 0440 /etc/sudoers.d/${DIB_SUDOERS_FILENAME}
+visudo -c || (rm /etc/sudoers.d/${DIB_SUDOERS_FILENAME} && false)

elements/sudoers/package-installs.yaml

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+sudo: