commit:     9f24a6cf60c7de22c6ab22ae18f3f01c7242a44d
Author:     Ulrich Müller <ulm <AT> gentoo <DOT> org>
AuthorDate: Sun May 16 18:22:15 2021 +0000
Commit:     Ulrich Müller <ulm <AT> gentoo <DOT> org>
CommitDate: Sun May 16 18:22:15 2021 +0000
URL:        https://gitweb.gentoo.org/proj/pms.git/commit/?id=9f24a6cf

EAPI 8 has dosym -r

Bug: https://bugs.gentoo.org/708360
Signed-off-by: Ulrich Müller <ulm <AT> gentoo.org>

 eapi-differences.tex |  4 ++++
 pkg-mgr-commands.tex | 38 +++++++++++++++++++++++++++++++++++---
 2 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/eapi-differences.tex b/eapi-differences.tex
index 5efe389..1e6e951 100644
--- a/eapi-differences.tex
+++ b/eapi-differences.tex
@@ -286,6 +286,9 @@ Output commands use stdout & 
\compactfeatureref{output-no-stdout} &
 \t{domo} destination path & \compactfeatureref{domo-path} &
     \t{\$\{DESTTREE\}} & \t{\$\{DESTTREE\}} & \t{\$\{DESTTREE\}} & \t{/usr} & 
\t{/usr} \\
 
+\t{dosym -r} \compactfeatureref{dosym-relative} &
+    No & No & No & No & Yes \\
+
 \t{new*} support stdin & \compactfeatureref{newfoo-stdin} &
     No & Yes & Yes & Yes & Yes \\
 
@@ -524,6 +527,7 @@ EAPI 8 is EAPI 7 with the following changes:
 \item \t{insopts} no longer affects \t{doconfd}, \t{doenvd} and \t{doheader}, 
\featureref{insopts}.
 \item \t{exeopts} no longer affects \t{doinitd}, \featureref{exeopts}.
 \item Less strict naming rules for files in \t{updates} directory, 
\featureref{updates-filenames}.
+\item \t{dosym} can create relative paths, \featureref{dosym-relative}.
 \end{compactitem}
 
 \ChangeWhenAddingAnEAPI{8}

diff --git a/pkg-mgr-commands.tex b/pkg-mgr-commands.tex
index 171a341..8d5c903 100644
--- a/pkg-mgr-commands.tex
+++ b/pkg-mgr-commands.tex
@@ -599,9 +599,27 @@ the current phase function has returned.
 
 \item[dosbin] As \t{dobin}, but installs to \t{DESTTREE/sbin}.
 
-\item[dosym] Creates a symbolic link named as for its second parameter, 
pointing to the first. If
-    the directory containing the new link does not exist, creates it. Failure 
behaviour is EAPI
-    dependent as per section~\ref{sec:failure-behaviour}.
+\item[dosym] Creates a symbolic link named as for its second parameter, 
pointing to the first.
+    If the directory containing the new link does not exist, creates it.
+
+    \featurelabel{dosym-relative} When called with option \t{-r} in EAPIs 
listed in
+    table~\ref{tab:dosym-r} as supporting creation of relative paths, expands 
the first parameter
+    relative to the apparent path of the directory containing the first 
parameter. The algorithm
+    must return a result identical to the one returned by the function in 
listing~\ref{lst:dosym-r},
+    with \t{realpath} and \t{dirname} from GNU coreutils version~8.32. 
Specifying option \t{-r}
+    together with a relative path as first (target) parameter is an error.
+
+    Failure behaviour is EAPI dependent as per 
section~\ref{sec:failure-behaviour}.
+
+\begin{listing}[h]
+\caption{Create a relative path for \t{dosym}} \label{lst:dosym-r}
+\begin{verbatim}
+dosym_relative_path() {
+    local link=$(realpath -m -s "/${2#/}")
+    realpath -m -s --relative-to="$(dirname "${link}")" "$1"
+}
+\end{verbatim}
+\end{listing}
 
 \item[fowners] Acts as for \t{chown}, but takes paths relative to the image 
directory. Failure
     behaviour is EAPI dependent as per section~\ref{sec:failure-behaviour}.
@@ -729,6 +747,20 @@ the current phase function has returned.
     \end{tabular}
 \end{centertable}
 
+\ChangeWhenAddingAnEAPI{8}
+\begin{centertable}{EAPIs supporting \t{dosym -r}}
+    \label{tab:dosym-r}
+    \begin{tabular}{ll}
+      \toprule
+      \multicolumn{1}{c}{\textbf{EAPI}} &
+      \multicolumn{1}{c}{\textbf{\t{dosym} supports creation of relative 
paths?}} \\
+      \midrule
+      0, 1, 2, 3, 4, 5, 6, 7  & No  \\
+      8                       & Yes \\
+      \bottomrule
+    \end{tabular}
+\end{centertable}
+
 \subsection{Commands affecting install destinations}
 The following commands are used to set the various destination trees and 
options used by the above
 installation commands. They must be shell functions or aliases, due to the 
need to set variables

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