feat(coros-image): add some basics image for coreos

layers/meta-belden-coreos/classes/coreos-image.bbclass

@@ -0,0 +1,48 @@
+# Class used to generate image based on Belden CoreOS
+
+# We don't ihnerit from core-image, so not all core-image specific IMAGE_FEATURE
+# are available. Only theses one are supported:
+FEATURE_PACKAGES_tools-debug = "packagegroup-core-tools-debug"
+FEATURE_PACKAGES_tools-profile = "packagegroup-core-tools-profile"
+FEATURE_PACKAGES_hwcodecs = "${MACHINE_HWCODECS}"
+
+MACHINE_HWCODECS ??= ""
+
+# These image features are CoreOS specifics:
+#
+# ssh-server: provide a ssh server, on core-image, two ssh server are supported
+#             and the features ssh-server-dropbear and ssh-server-openssh are 
+#             available. For CoreOS, we only support dropbear
+FEATURE_PACKAGES_ssh-server = "packagegroup-core-ssh-dropbear"
+
+
+# We can handle feature that conflicts with either:
+
+# IMAGE_FEATURES_REPLACES_foo = 'bar1 bar2'
+# Including image feature foo would replace the image features bar1 and bar2
+
+# IMAGE_FEATURES_CONFLICTS_foo = 'bar1 bar2'
+# An error exception would be raised if both image features foo and bar1(or bar2) are included
+
+COREOS_IMAGE_BASE_INSTALL = '\
+    packagegroup-core-boot \
+    packagegroup-base-extended \
+    \
+    ${COREOS_IMAGE_EXTRA_INSTALL} \
+    '
+
+COREOS_IMAGE_EXTRA_INSTALL ?= ""
+
+IMAGE_INSTALL ?= "${COREOS_IMAGE_BASE_INSTALL} ${COREOS_IMAGE_EXTRA_INSTALL}"
+
+# IMAGE_LINGUAS default value is set in image.bbclass, so we need to change it
+# before ihneriting the image class, as we don't need to install custom locales
+IMAGE_LINGUAS ?= " "
+
+inherit image
+
+# Enable some feature by default
+IMAGE_FEATURES += "read-only-rootfs"
+
+# Add some extra space, as done in core-image-minimal
+IMAGE_ROOTFS_EXTRA_SPACE:append = "${@bb.utils.contains("DISTRO_FEATURES", "systemd", " + 4096", "", d)}"

layers/meta-belden-coreos/conf/distro/belden-coreos.conf

@@ -13,7 +13,7 @@ DISTRO_CODENAME = "kirkstone"
 PACKAGE_CLASSES = "package_ipk"
 INIT_MANAGER = "systemd"
 
-DISTRO_FEATURES_DEFAULT ?= "bluetooth usbhost pci ipv4 ipv6 wifi multiarch usrmerge"
+DISTRO_FEATURES_DEFAULT ?= "bluetooth usbhost pci ipv4 ipv6 wifi multiarch usrmerge ptest"
 DISTRO_FEATURES ?= "${DISTRO_FEATURES_DEFAULT}"
 DISTRO_FEATURES_BACKFILL_CONSIDERED = "pulseaudio gobject-introspection-data ldconfig"
 DISTRO_EXTRA_RDEPENDS += "packagegroup-core-boot"

layers/meta-belden-coreos/recipes-core/images/coreos-image-full-cmdline.bb

@@ -0,0 +1,7 @@
+DESCRIPTION = "A console-only image with more full-featured Linux system \
+functionality installed."
+
+inherit coreos-image
+
+IMAGE_FEATURES += "ssh-server"
+IMAGE_INSTALL:append = " packagegroup-core-full-cmdline"

layers/meta-belden-coreos/recipes-core/images/coreos-image-minimal-dev.bb

@@ -0,0 +1,6 @@
+require coreos-image-minimal.bb
+
+DESCRIPTION = "A small image just capable of allowing a device to boot and \
+is suitable for development work."
+
+IMAGE_FEATURES += "dev-pkgs"

layers/meta-belden-coreos/recipes-core/images/coreos-image-minimal.bb

@@ -0,0 +1,8 @@
+SUMMARY = "A small image just capable of allowing a device to boot."
+
+
+LICENSE = "MIT"
+
+inherit coreos-image
+
+IMAGE_ROOTFS_SIZE ?= "8192"

templates/conf-notes.txt

@@ -10,8 +10,8 @@
 You can now run 'bitbake <target>'
 
 Common targets are:
-    core-image-minimal
-    core-image-full-cmdline
+    coreos-image-minimal
+    coreos-image-full-cmdline
     meta-toolchain
     meta-ide-support