[gnome-continuous-yocto/gnomeostree-3.28-rocko: 8113/8267] ref-manual: Updated "Build Image" section for do_image<type>[depends]

[Emmanuele Bassi <ebassi src gnome org>]

commit e08129f909aa514405345a1b46e80aaa88b1f08e
Author: Scott Rifenbark <srifenbark gmail com>
Date:   Fri Oct 20 13:04:14 2017 -0700

    ref-manual: Updated "Build Image" section for do_image<type>[depends]
    
    Added information about how the build system dynamically creates
    do_image_* tasks (e.g. do_image_ext4[depends]) when creating the
    image.  This is functionality that replaced IMAGE_DEPENDS_type.
    
    (From yocto-docs rev: c977df506585aad1ade99c390bacc04b54eb0e48)
    
    Signed-off-by: Scott Rifenbark <srifenbark gmail com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 .../ref-manual/ref-development-environment.xml     |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/documentation/ref-manual/ref-development-environment.xml 
b/documentation/ref-manual/ref-development-environment.xml
index e590406..1339901 100644
--- a/documentation/ref-manual/ref-development-environment.xml
+++ b/documentation/ref-manual/ref-development-environment.xml
@@ -2255,6 +2255,22 @@
             </para>
 
             <para>
+                As an example, a dynamically created task when creating a
+                particular image <replaceable>type</replaceable> would take the
+                following form:
+                <literallayout class='monospaced'>
+     do_image_<replaceable>type</replaceable>[depends]
+                </literallayout>
+                So, if the <replaceable>type</replaceable> as specified by the
+                <link linkend='var-IMAGE_FSTYPES'><filename>IMAGE_FSTYPES</filename></link>
+                were <filename>ext4</filename>, the dynamically generated task
+                would be as follows:
+                <literallayout class='monospaced'>
+     do_image_ext4[depends]
+                </literallayout>
+            </para>
+
+            <para>
                 The final task involved in image creation is the
                 <link linkend='ref-tasks-image-complete'><filename>do_image_complete</filename></link>
                 task.