From e508676583bcc5c32ebdcd76317dc610d3051376 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Sat, 12 Dec 2009 01:10:41 +0000
Subject: [PATCH] Update for EAPI 3_pre2.

svn path=/main/trunk/; revision=15043
---
 doc/package/ebuild/eapi/3.docbook | 99 +++++++++++++++++++++++++++++--
 1 file changed, 93 insertions(+), 6 deletions(-)

diff --git a/doc/package/ebuild/eapi/3.docbook b/doc/package/ebuild/eapi/3.docbook
index 7be24f29c..7bab213bb 100644
--- a/doc/package/ebuild/eapi/3.docbook
+++ b/doc/package/ebuild/eapi/3.docbook
@@ -1,15 +1,102 @@
-<section id='package-ebuild-eapi-3_pre1'>
-<title>EAPI 3_pre1</title>
-<section id='package-ebuild-eapi-3_pre1-helpers'>
+<section id='package-ebuild-eapi-3_pre2'>
+<title>EAPI 3_pre2</title>
+<section id='package-ebuild-eapi-3_pre2-helpers'>
 <title>Helpers</title>
-<section id='package-ebuild-eapi-3_pre1-helpers-unpack'>
+<section id='package-ebuild-eapi-3_pre2-helpers-unpack'>
 <title>unpack</title>
-<section id='package-ebuild-eapi-3_pre1-helpers-unpack-xz'>
+<section id='package-ebuild-eapi-3_pre2-helpers-unpack-xz'>
 <title>Support for the xz file extension</title>
 <para>
-The xz file extension is now supported.
+The unpack helper now supports the xz file extension.
 </para>
 </section>
 </section>
 </section>
+<section id='package-ebuild-eapi-3_pre2-prefix'>
+<title>Support for installation prefix</title>
+<section id='package-ebuild-eapi-3_pre2-prefix-helpers'>
+<title>Helpers</title>
+<para>
+Beginning with EAPI 3, all helpers use ${ED} instead of ${D}
+when appropriate. For example, see econf and einstall below.
+</para>
+<section id='package-ebuild-eapi-3_pre2-prefix-helpers-econf'>
+<title>econf</title>
+<programlisting>
+${ECONF_SOURCE:-.}/configure \
+        --prefix="${EPREFIX}"/usr \
+        --host="${EPREFIX}${CHOST} \
+        --mandir="${EPREFIX}"/usr/share/man \
+        --infodir="${EPREFIX}"/usr/share/info \
+        --datadir="${EPREFIX}"/usr/share \
+        --sysconfdir="${EPREFIX}"/etc \
+        --localstatedir="${EPREFIX}"/var/lib \
+        ${EXTRA_ECONF} \
+        configure options || die "econf failed"
+</programlisting>
+</section>
+<section id='package-ebuild-eapi-3_pre2-prefix-helpers-einstall'>
+<title>einstall</title>
+<para>
+Note that, for make-based packages, 'emake install DESTDIR=${D}' (with
+DESTDIR=${D} rather than ${ED}) is still preferred over einstall.
+</para>
+<programlisting>
+make \
+        prefix=${ED}/usr \
+        datadir=${ED}/usr/share \
+        infodir=${ED}/usr/share/info \
+        localstatedir=${ED}/var/lib \
+        mandir=${ED}/usr/share/man \
+        sysconfdir=${ED}/etc \
+        ${EXTRA_EINSTALL} \
+        make options \
+        install
+</programlisting>
+</section>
+</section>
+<section id='package-ebuild-eapi-3_pre2-prefix-variables'>
+<title>Variables</title>
+<table><title>Installation Prefix Variables</title>
+	<tgroup cols='2' align='left' >
+	<colspec colname='name'/>
+	<colspec colname='description'/>
+	<thead>
+	<row>
+		<entry>Variable Name</entry>
+		<entry>Description</entry>
+	</row>
+	</thead>
+	<tbody>
+	<row>
+		<entry>ED</entry>
+		<entry>Contains the path
+		"${D%/}${EPREFIX}/" for convenience purposes.
+		For EAPI values prior to EAPI 3 which do not
+		support ${ED}, helpers use ${D} where they would
+		otherwise use ${ED}. Do not modify this variable.
+		</entry>
+	</row>
+	<row>
+		<entry>EPREFIX</entry>
+		<entry>Contains the offset
+		that this Portage was configured for during
+		installation. The offset is sometimes necessary
+		in an ebuild or eclass, and is available in such
+		cases as ${EPREFIX}. EPREFIX does not contain a
+		trailing slash, therefore an absent offset is
+		represented by the empty string. Do not modify
+		this variable. </entry>
+	</row>
+	<row>
+		<entry>EROOT</entry>
+		<entry>Contains
+		"${ROOT%/}${EPREFIX}/" for convenience purposes.
+		Do not modify this variable. </entry>
+	</row>
+	</tbody>
+	</tgroup>
+</table>
+</section>
+</section>
 </section>
-- 
2.26.2