ui/hob: enable building an image with minimal contents

This patch enables a user to build a rootfs containing only the selected
packages without having to have first selected a 'Base image'.

Fixes [YOCTO #1239]

(Bitbake rev: 05c82da31a69c910e72b58b07afcd9fca8c55479)

Signed-off-by: Joshua Lock <josh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 30 insertions, 7 deletions

diff --git a/bitbake/lib/bb/ui/crumbs/tasklistmodel.py b/bitbake/lib/bb/ui/crumbs/tasklistmodel.py
index f4dffc6..36a5673 100644
--- a/bitbake/lib/bb/ui/crumbs/tasklistmodel.py
+++ b/bitbake/lib/bb/ui/crumbs/tasklistmodel.py
@@ -60,9 +60,19 @@ require %s
 
 IMAGE_INSTALL += "%s"
 """
-        meta_path = model.find_image_path(self.base_image)
 
-        recipe = template % (meta_path, self.userpkgs)
+        empty_template = """
+# Recipe generated by the HOB
+
+inherit core-image
+
+IMAGE_INSTALL = "%s"
+"""
+        if self.base_image and not self.base_image == "empty":
+            meta_path = model.find_image_path(self.base_image)
+            recipe = template % (meta_path, self.userpkgs)
+        else:
+            recipe = empty_template % self.allpkgs
 
         if os.path.exists(writepath):
             os.rename(writepath, "%s~" % writepath)
diff --git a/bitbake/lib/bb/ui/hob.py b/bitbake/lib/bb/ui/hob.py
index 865933c..d3442c5 100644
--- a/bitbake/lib/bb/ui/hob.py
+++ b/bitbake/lib/bb/ui/hob.py
@@ -369,20 +369,31 @@ class MainWindow (gtk.Window):
         self.dirty = False
 
     def bake_clicked_cb(self, button):
+        build_image = True
+
         rep = self.model.get_build_rep()
         if not rep.base_image:
-            lbl = "<b>Build only packages?</b>\n\nAn image has not been selected, so only the selected packages will be built."
+            lbl = "<b>Build empty image or only packages?</b>\nA base image"
+            lbl = lbl + " has not been selected.\n\'Empty image' will build"
+            lbl = lbl + " an image with only the selected packages as its"
+            lbl = lbl + " contents.\n'Packages Only' will build only the"
+            lbl = lbl + " selected packages, no image will be created"
             dialog = CrumbsDialog(self, lbl, gtk.STOCK_DIALOG_WARNING)
             dialog.add_button(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL)
-            dialog.add_button("Build", gtk.RESPONSE_YES)
+            dialog.add_button("Empty Image", gtk.RESPONSE_OK)
+            dialog.add_button("Packages Only", gtk.RESPONSE_YES)
             response = dialog.run()
             dialog.destroy()
             if response == gtk.RESPONSE_CANCEL:
                 return
-            else:
-                self.handler.build_packages(rep.allpkgs.split(" "))
-        else:
+            elif response == gtk.RESPONSE_YES:
+                build_image = False
+            elif response == gtk.RESPONSE_OK:
+                rep.base_image = "empty"
+
+        if build_image:
             import tempfile, datetime
+
             image_name = "hob-%s-variant-%s" % (rep.base_image, datetime.date.today().isoformat())
             image_file = "%s.bb" % (image_name)
             image_dir = os.path.join(tempfile.gettempdir(), 'hob-images')
@@ -397,6 +408,8 @@ class MainWindow (gtk.Window):
                 self.files_to_clean.append(recipepath)
 
             self.handler.build_image(image_name, image_dir, self.configurator)
+        else:
+            self.handler.build_packages(rep.allpkgs.split(" "))
 
         self.nb.set_current_page(1)