[OE-core] [PATCH 1/3] Empty image: core-image-empty recipe, Rootfs fix

[Alex Franco]

Added a core-image-empty recipe, as well as a DpkgOpkgRootfs test
which skips the package post installs step, if PACKAGE_INSTALL is
empty.

[YOCTO #7664]

Signed-off-by: Alex Franco <alejandro.franco at linux.intel.com>
---
 meta/lib/oe/rootfs.py                        | 6 +++++-
 meta/recipes-core/images/core-image-empty.bb | 7 +++++++
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 meta/recipes-core/images/core-image-empty.bb

diff --git a/meta/lib/oe/rootfs.py b/meta/lib/oe/rootfs.py
index 8c8244c..f8cc6eb 100644
--- a/meta/lib/oe/rootfs.py
+++ b/meta/lib/oe/rootfs.py
@@ -585,7 +585,11 @@ class DpkgOpkgRootfs(Rootfs):
 
         pkg_list = []
 
-        pkgs = self._get_pkgs_postinsts(status_file)
+        pkgs = None
+        if not self.d.getVar('PACKAGE_INSTALL', True).strip():
+            bb.note("Building empty image")
+        else:
+            pkgs = self._get_pkgs_postinsts(status_file)
         if pkgs:
             root = "__packagegroup_postinst__"
             pkgs[root] = pkgs.keys()
diff --git a/meta/recipes-core/images/core-image-empty.bb b/meta/recipes-core/images/core-image-empty.bb
new file mode 100644
index 0000000..550567c
--- /dev/null
+++ b/meta/recipes-core/images/core-image-empty.bb
@@ -0,0 +1,7 @@
+SUMMARY = "An empty image."
+IMAGE_INSTALL = ""
+IMAGE_LINGUAS = ""
+PACKAGE_INSTALL = ""
+LICENSE = "MIT"
+
+inherit image
-- 
2.5.0