\subsection{Image customizations}
\begin{frame}[fragile]
\frametitle{Adding a bootscript}
\begin{itemize}
\item Add 'systemd' to DISTRO\_FEATURES
\item Inherit from systemd.bbclass
\item Your package needs to set SYSTEMD\_SERVICE variable; e.g.
\begin{verbatim}
SYSTEMD_SERVICE_${PN} = "connman.service"
\end{verbatim}
\item To disable the service, set SYSTEMD\_AUTO\_ENABLE to 'disable'
\end{itemize}
\end{frame}

\begin{frame}[fragile]
\frametitle{User and group configuration}
Use this in an image recipe:
\begin{verbatim}
inherit extrausers
EXTRA_USERS_PARAMS = "\
    useradd -p '' tester; \
    groupadd developers; \
    userdel nobody; \
    groupdel -g video; \
    groupmod -g 1020 developers; \
    usermod -s /bin/sh tester; \
    "
\end{verbatim}
Or the useradd class for creating a user if a package is installed.
For an example see useradd-example.bb
\end{frame}

\begin{frame}[fragile]
\frametitle{External sources}
E.g. for a heavily customized kernel
\begin{itemize}
\item Kernel source directory on the development machine
\item Inherit externalsrc class
\item Set EXTERNALSRC variable to point to your external source code
\end{itemize}

This local.conf extension:
\begin{verbatim}
INHERIT += "externalsrc"
EXTERNALSRC_pn-myrecipe = "/some/path/to/your/source/tree"
\end{verbatim}
overrides the SOURCE\_URI of pn-myrecipe.bb
\end{frame}

\begin{frame}[fragile]
\frametitle{Blacklist packages}
To blacklist a package, inherit the blacklist.bbclass globally and set
PNBLACKLIST for each recipe you wish to blacklist.


Specify the PN value as a variable flag (varflag) and provide a reason,
which is reported, if the package is requested to be built as the value:
\begin{verbatim}
INHERIT += "blacklist"
PNBLACKLIST[exoticware] = "Not supported by our organization."
\end{verbatim}
\end{frame}

\begin{frame}[fragile]
\frametitle{Override oe-init-buildenv templates}
Default templates can be overridden by setting TEMPLATECONF
to e.g. meta-foo/conf during ./oe-init-buildenv.

Then meta-foo/conf bblayers.conf.sample and local.conf.sample will
be used.

The default location is specified in

\begin{verbatim}
% cat .templateconf
# Template settings
TEMPLATECONF=${TEMPLATECONF:-meta-yocto/conf}
\end{verbatim}
\end{frame}