diff options
Diffstat (limited to 'dependencies.tex')
| -rw-r--r-- | dependencies.tex | 154 |
1 files changed, 132 insertions, 22 deletions
diff --git a/dependencies.tex b/dependencies.tex index de29703..bd62649 100644 --- a/dependencies.tex +++ b/dependencies.tex @@ -25,16 +25,10 @@ be surrounded on both sides by whitespace, except at the start and end of the st \item A package dependency specification. Permitted in \t{DEPEND}, \t{RDEPEND}, \t{PDEPEND}. \item A simple qualified package name. Permitted in \t{PROVIDE} (and inside \t{DEPEND} etc via the previous item). -\IFKDEBUILDELSE -{ - \item A URI, in the form \t{proto://host/path}. Permitted in \t{SRC\_URI} and \t{HOMEPAGE}. - In EAPIs listed in table~\ref{uri-arrows-table} as supporting \t{SRC\_URI} arrows, may - optionally be followed by whitespace, then \t{->}, then whitespace, then a simple filename - when in \t{SRC\_URI}. For \t{SRC\_URI} behaviour, see section~\ref{src-uri-behaviour}. -}{ - \item A URI, in the form \t{proto://host/path}. Permitted in \t{SRC\_URI} and \t{HOMEPAGE}. - For \t{SRC\_URI} behaviour, see section~\ref{src-uri-behaviour}. -} +\item A URI, in the form \t{proto://host/path}. Permitted in \t{SRC\_URI} and \t{HOMEPAGE}. +In EAPIs listed in table~\ref{uri-arrows-table} as supporting \t{SRC\_URI} arrows, may +optionally be followed by whitespace, then \t{->}, then whitespace, then a simple filename +when in \t{SRC\_URI}. For \t{SRC\_URI} behaviour, see section~\ref{src-uri-behaviour}. \item A flat filename. Permitted in \t{SRC\_URI}. \item A license name (e.g. \t{GPL-2}). Permitted in \t{LICENSE}. \item A simple string. Permitted in \t{RESTRICT}. @@ -66,9 +60,9 @@ be surrounded on both sides by whitespace, except at the start and end of the st In particular, note that whitespace is not optional. +\begin{centertable}{EAPIs supporting \t{SRC\_URI} arrows} \label{uri-arrows-table} \IFKDEBUILDELSE { - \begin{centertable}{EAPIs supporting \t{SRC\_URI} arrows} \label{uri-arrows-table} \begin{tabular}{ l l } \toprule \multicolumn{1}{c}{\textbf{EAPI}} & @@ -77,10 +71,25 @@ In particular, note that whitespace is not optional. \t{0} & No \\ \t{1} & No \\ \t{kdebuild-1} & Yes \\ + \t{2} & Yes \\ \bottomrule \end{tabular} - \end{centertable} +}{ + \begin{tabular}{ l l } + \toprule + \multicolumn{1}{c}{\textbf{EAPI}} & + \multicolumn{1}{c}{\textbf{Supports \t{SRC\_URI} arrows?}} \\ + \midrule + \t{0} & No \\ + \t{1} & No \\ + \t{2} & Yes \\ + \bottomrule + \end{tabular} +} +\end{centertable} +\IFKDEBUILDELSE +{ \begin{centertable}{EAPIs supporting \t{SRC\_URI} labels} \label{uri-labels-table} \begin{tabular}{ l l } \toprule @@ -90,6 +99,7 @@ In particular, note that whitespace is not optional. \t{0} & No \\ \t{1} & No \\ \t{kdebuild-1} & Yes \\ + \t{2} & No \\ \bottomrule \end{tabular} \end{centertable} @@ -103,6 +113,7 @@ In particular, note that whitespace is not optional. \t{0} & No \\ \t{1} & No \\ \t{kdebuild-1} & Yes \\ + \t{2} & No \\ \bottomrule \end{tabular} \end{centertable} @@ -166,15 +177,29 @@ EAPI not supporting \t{SLOT} dependencies. specification that does not use an operator at the start may additionally be suffixed by one \t{[range]} restriction, as described in section~\ref{range-dep}. A package manager must warn or error if this feature is used with an EAPI not supporting ranged dependencies. +}{ +} - In EAPIs shown in table~\ref{use-deps-table} as supporting \t{USE} dependencies, a specification - may additionally be suffixed by one or more \t{[use]} restrictions, as described in - section~\ref{use-dep}. A package manager must warn or error if this feature is used with an EAPI - not supporting use dependencies. +\IFKDEBUILDELSE +{ + In EAPIs shown in table~\ref{use-deps-table} as supporting kdebuild-style \t{USE} dependencies, + a specification may additionally be suffixed by one or more kdebuild-style \t{[use]} + restrictions, as described in section~\ref{kdebuild-use-dep}. A package manager must warn or + error if this feature is used with an EAPI not supporting use dependencies. +}{ +} +In EAPIs shown in table~\ref{use-deps-table} as supporting 2-style \t{USE} dependencies, a specification +may additionally be suffixed by at most one 2-style \t{[use]} restriction, as described in +section~\ref{use-dep}. A package manager must warn or error if this feature is used with an EAPI +not supporting use dependencies. + +\IFKDEBUILDELSE +{ \note Order is important. The slot restriction must come before the range restriction, which must come before use dependencies. }{ + \note Order is important. The slot restriction must come before use dependencies. } \begin{centertable}{EAPIs supporting \t{SLOT} dependencies} \label{slot-deps-table} @@ -188,6 +213,7 @@ EAPI not supporting \t{SLOT} dependencies. \t{0} & No \\ \t{1} & Named only \\ \t{kdebuild-1} & Named and operator \\ + \t{2} & Named only \\ \bottomrule \end{tabular} }{ @@ -198,6 +224,7 @@ EAPI not supporting \t{SLOT} dependencies. \midrule \t{0} & No \\ \t{1} & Yes \\ + \t{2} & Yes \\ \bottomrule \end{tabular} } @@ -214,10 +241,15 @@ EAPI not supporting \t{SLOT} dependencies. \t{0} & No \\ \t{1} & No \\ \t{kdebuild-1} & Yes \\ + \t{2} & No \\ \bottomrule \end{tabular} \end{centertable} +}{ +} +\IFKDEBUILDELSE +{ \begin{centertable}{EAPIs supporting \t{USE} dependencies} \label{use-deps-table} \begin{tabular}{ l l } \toprule @@ -226,11 +258,24 @@ EAPI not supporting \t{SLOT} dependencies. \midrule \t{0} & No \\ \t{1} & No \\ - \t{kdebuild-1} & Yes \\ + \t{kdebuild-1} & kdebuild-style \\ + \t{2} & 2-style \\ \bottomrule \end{tabular} \end{centertable} }{ + \begin{centertable}{EAPIs supporting \t{USE} dependencies} \label{use-deps-table} + \begin{tabular}{ l l } + \toprule + \multicolumn{1}{c}{\textbf{EAPI}} & + \multicolumn{1}{c}{\textbf{Supports \t{USE} dependencies?}} \\ + \midrule + \t{0} & No \\ + \t{1} & No \\ + \t{2} & 2-style \\ + \bottomrule + \end{tabular} + \end{centertable} } \subsubsection{Operators} @@ -254,8 +299,8 @@ The following operators are available: \subsubsection{Block Operator} -If the specification is prefixed with an exclamation mark, the named dependency is a block rather -than a requirement---that is to say, the specified package must not be installed, with the +If the specification is prefixed with one or two exclamation marks, the named dependency is a block +rather than a requirement---that is to say, the specified package must not be installed, with the following exceptions: \begin{compactitem} @@ -263,6 +308,41 @@ following exceptions: \item Blocks on the ebuild itself do not count. \end{compactitem} +There are two strengths of block: weak and strong. A weak block may be ignored by the package +manager, so long as any blocked package will be uninstalled later on. A strong block must not be +ignored. The mapping from one or two exclamation marks to strength is described in +table~\ref{bang-strength-table}. + +\begin{centertable}{Exclamation mark strengths for EAPIs} \label{bang-strength-table} +\IFKDEBUILDELSE +{ + \begin{tabular}{ l l l } + \toprule + \multicolumn{1}{c}{\textbf{EAPI}} & + \multicolumn{1}{c}{\textbf{\t{!}}} & + \multicolumn{1}{c}{\textbf{\t{!!}}} \\ + \midrule + \t{0} & Unspecified & Forbidden \\ + \t{1} & Unspecified & Forbidden \\ + \t{kdebuild-1} & Unspecified & Forbidden \\ + \t{2} & Weak & Strong \\ + \bottomrule + \end{tabular} +}{ + \begin{tabular}{ l l l } + \toprule + \multicolumn{1}{c}{\textbf{EAPI}} & + \multicolumn{1}{c}{\textbf{\t{!}}} & + \multicolumn{1}{c}{\textbf{\t{!!}}} \\ + \midrule + \t{0} & Unspecified & Forbidden \\ + \t{1} & Unspecified & Forbidden \\ + \t{2} & Weak & Strong \\ + \bottomrule + \end{tabular} +} +\end{centertable} + \subsubsection{Slot Dependencies} \label{slot-dep} @@ -314,10 +394,10 @@ the match is treated as unsuccessful. \IFKDEBUILDELSE { - \subsubsection{Use Dependencies} - \label{use-dep} + \subsubsection{kdebuild Style Use Dependencies} + \label{kdebuild-use-dep} - A use dependency consists of one of the following: + A kdebuild-style use dependency consists of one of the following: \begin{description} \item{[opt]} The flag must be enabled. @@ -337,9 +417,39 @@ the match is treated as unsuccessful. \end{description} When multiple use dependencies are specified, all must match for a successful match. + + It is an error for a use dependency to be applied to an ebuild which does not have the flag in + question in \t{IUSE}, or for an ebuild to use a conditional use dependency when that ebuild does + not have the flag in \t{IUSE}. }{ } +\subsubsection{2-Style Use Dependencies} +\label{use-dep} + +A 2-style use dependency consists of one of the following: + +\begin{description} +\item{[opt]} The flag must be enabled. +\item{[opt=]} The flag must be enabled if the flag is enabled for the package with the + dependency, or disabled otherwise. +\item{[!opt=]} The flag must be disabled if the flag is enabled for the package with the + dependency, or enabled otherwise. +\item{[opt?]} The flag must be enabled if the flag is enabled for the package with the + dependency. +\item{[!opt?]} The flag must be disabled if the use flag is disabled for the package with the + dependency. +\item{[-opt]} The flag must be disabled. +\end{description} + +Multiple requirements may be combined using commas, e.g. \t{[first,-second,third?]}. + +When multiple requirements are specified, all must match for a successful match. + +It is an error for a use dependency to be applied to an ebuild which does not have the flag in +question in \t{IUSE}, or for an ebuild to use a conditional use dependency when that ebuild does +not have the flag in \t{IUSE}. + \IFKDEBUILDELSE { \subsection{Package Dependency Labels} |