ref-manual: add documentation for rm_work.bbclass

I rewrote the class description to conform to the existing
manual style.  Mainly making voice active and breaking up
long sentenced.

(From yocto-docs rev: e715167e280eb647be52c142f733942dab3f4dfb)

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

1 files changed, 36 insertions, 1 deletions

diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index a03a68b6e9..acda0da063 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -538,6 +538,42 @@
     </para>
 </section>
 
+<section id='ref-classes-rm-work'>
+    <title>Removing work files during the build - <filename>rm_work.bbclass</filename></title>
+
+    <para>
+        The OpenEmbedded build system can use a substantial amount of disk 
+        space during the build process.
+        A portion of this space is the work files under the 
+        <filename>${TMPDIR}/work</filename> directory for each recipe. 
+        Once the build system generates the packages for a recipe, the work 
+        files for that recipe are no longer needed.
+        However, by default, the build system preserves these files
+        for inspection and possible debugging purposes.
+        If you would rather have these files deleted to save disk space 
+        as the build progresses, you can enable <filename>rm_work</filename>
+        by adding the following to your <filename>local.conf</filename> file,
+        which is found in the 
+        <ulink url='&YOCTO_DOCS_DEV_URL;#build-directory'>Build Directory</ulink>.
+        <literallayout class='monospaced'>
+    INHERIT += "rm_work"
+        </literallayout>
+        If you are modifying and building source code out of the work directory 
+        for a recipe, enabling <filename>rm_work</filename> will potentially 
+        result in your changes to the source being lost. 
+        To exclude some recipes from having their work directories deleted by
+        <filename>rm_work</filename>, you can add the names of the recipe or 
+        recipes you are working on to the <filename>RM_WORK_EXCLUDE</filename> 
+        variable, which is also found in your <filename>local.conf</filename>
+        file.
+        Here is an example:
+        <literallayout class='monospaced'>
+    RM_WORK_EXCLUDE += "busybox eglibc"
+        </literallayout>
+    </para>
+</section>
+
+
 <section id='ref-classes-siteinfo'>
     <title>Autotools Configuration Data Cache - <filename>siteinfo.bbclass</filename></title>
 
@@ -732,7 +768,6 @@
         qt4*.bbclass
         recipe_sanity.bbclass
         relocatable.bbclass
-        rm_work.bbclass
         scons.bbclass
         sdl.bbclass
         setuptools.bbclass