ref-manual, mega-manual: Edits for expanded packaging description

Fixes [YOCTO #2808]

Applied review comments to the package splitting section in the
section that digs deeper into the build process.  This involved
updating the figure that resides in both "figures" directories
of the ref-manual and the mega-manual. Also updated supporting
text throughout the section per Paul's comments.

(From yocto-docs rev: 34e3610d0c6912530f678e9f1fa4587aaaf9fc70)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/technical-details.xml

@@ -1130,38 +1130,49 @@
             <title>Package Splitting</title>
 
             <para>
-                After source code configured and compiled, BitBake analyzes
-                the results and splits the output into package:
+                After source code is configured and compiled, the
+                OpenEmbedded build system analyzes
+                the results and splits the output into packages:
                 <imagedata fileref="figures/analysis-for-package-splitting.png" align="center" width="7in" depth="7in" />
             </para>
 
             <para>
                 The <filename>do_package</filename> and
                 <filename>do_packagedata</filename> tasks combine to analyze
-                the data found in the
+                the files found in the
                 <link linkend='var-D'><filename>D</filename></link> directory
-                and split it into subsets based on available packages and
+                and split them into subsets based on available packages and
                 files.
-                The analyzing process involves splitting out debugging symbols,
-                looking at shared library dependencies between packages, and
-                looking at package relationships.
-                The <filename>do_packagedata</filename> task puts package
-                metadata based on the analysis such that BitBake can generate
-                the final packages.
-                Intermediate results of the package analysis and splitting
-                end up in the
-                <link linkend='var-PKGDEST'><filename>PKGDEST</filename></link>
-                directory with the
-                <link linkend='var-FILES'><filename>FILES</filename></link>
-                variable defining the files that go into the packages.
-                If you want some details on how this is accomplished, you can
+                The analyzing process involves the following as well as other
+                items: splitting out debugging symbols,
+                looking at shared library dependencies between packages,
+                and looking at package relationships.
+                The <filename>do_packagedata</filename> task creates package
+                metadata based on the analysis such that the
+                OpenEmbedded build system can generate the final packages.
+                Working, staged, and intermediate results of the analysis
+                and package splitting process use these areas:
+                <itemizedlist>
+                    <listitem><para><link linkend='var-PKGD'><filename>PKGD</filename></link>
+                        </para></listitem>
+                    <listitem><para><link linkend='var-PKGDATA_DIR'><filename>PKGDATA_DIR</filename></link>
+                        </para></listitem>
+                    <listitem><para><link linkend='var-PKGDESTWORK'><filename>PKGDESTWORK</filename></link>
+                        </para></listitem>
+                    <listitem><para><link linkend='var-PKGDEST'><filename>PKGDEST</filename></link>
+                        </para></listitem>
+                </itemizedlist>
+                The <link linkend='var-FILES'><filename>FILES</filename></link>
+                variable defines the files that go into each package in
+                <link linkend='var-PACKAGES'><filename>PACKAGES</filename></link>.
+                If you want details on how this is accomplished, you can
                 look at
                 <link linkend='ref-classes-package'><filename>package.bbclass</filename></link>.
             </para>
 
             <para>
                 Depending on the type of packages being created (RPM, DEB, or
-                IPK), the <filename>do_packagewrite_*</filename> task
+                IPK), the <filename>do_package_write_*</filename> task
                 creates the actual packages and places them in the
                 Package Feed area, which is
                 <filename>${TMPDIR}/deploy</filename>.
@@ -1173,9 +1184,10 @@
                     <filename>deploy/*</filename> directories does not exist.
                     Creating such feeds usually requires some kind of feed
                     maintenance mechanism that would upload the new packages
-                    into an official package feed (e.g. angstrom).
-                    Providing such a piece for the user is not feasible since
-                    it is very distribution-specific.
+                    into an official package feed (e.g. the
+                    Ångström distribution).
+                    This functionality is highly distribution-specific
+                    and thus is not provided out of the box.
                 </note>
             </para>
         </section>