1 files changed, 15 insertions, 0 deletions

diff --git a/documentation/ref-manual/closer-look.xml b/documentation/ref-manual/closer-look.xml
index 683fa42259..136f9389f7 100644
--- a/documentation/ref-manual/closer-look.xml
+++ b/documentation/ref-manual/closer-look.xml
@@ -971,6 +971,21 @@
             </para>
 
             <para>
+                Along with writing out the root filesystem image, the
+                <filename>do_rootfs</filename> task creates a manifest file
+                (<filename>.manifest</filename>) in the same directory as
+                the root filesystem image that lists out, line-by-line, the
+                installed packages.
+                This manifest file is useful for the
+                <link linkend='ref-classes-testimage'><filename>testimage</filename></link>
+                class, for example, to determine whether or not to run
+                specific tests.
+                See the
+                <link linkend='var-IMAGE_MANIFEST'><filename>IMAGE_MANIFEST</filename></link>
+                variable for additional information.
+            </para>
+
+            <para>
                 Part of the image generation process includes compressing the
                 root filesystem image.
                 Compression is accomplished through several optimization