\chapter{Ebuild File Format}
\label{sec:ebuild-format}

\featurelabel{bash-version} The ebuild file format is in its basic form a subset of the format of
a bash script. The interpreter is assumed to be GNU bash, version as listed in
table~\ref{tab:bash-version}, or any later version. If possible, the package manager should set
the shell's compatibility level to the exact version specified. It must ensure that any such
compatibility settings (e.g. the \t{BASH\_COMPAT} variable) are not exported to external programs.

The file encoding must be UTF-8 with Unix-style newlines. When sourced, the ebuild must define
certain variables and functions (see sections~\ref{sec:ebuild-vars} and~\ref{sec:ebuild-functions}
for specific information), and must not call any external programs, write anything to standard
output or standard error, or modify the state of the system in any way.

\ChangeWhenAddingAnEAPI{6}
\begin{centertable}{Bash version}
    \label{tab:bash-version}
    \begin{tabular}{ll}
      \toprule
      \multicolumn{1}{c}{\textbf{EAPI}} &
      \multicolumn{1}{c}{\textbf{Bash version}} \\
      \midrule
      0, 1, 2, 3, 4, 5  & 3.2 \\
      6                 & 4.2 \\
      \bottomrule
    \end{tabular}
\end{centertable}

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