[OE-core] [PATCH 1/1] image_types.bbclass: remove the obsolete images

[Robert Yang]

Remove the obsolete image before the new one generated to save disk
space when RM_OBSOLETE_IMAGE is set to 1, this is an easy way to keep
the DEPLOY_DIR_IMAGE clean.

[YOCTO #4391]

Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
---
 meta/classes/image_types.bbclass     | 6 +++++-
 meta/conf/local.conf.sample.extended | 3 +++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass
index 94837ae..27f232e 100644
--- a/meta/classes/image_types.bbclass
+++ b/meta/classes/image_types.bbclass
@@ -51,7 +51,11 @@ def get_imagecmds(d):
         types.remove("live")
 
     if d.getVar('IMAGE_LINK_NAME', True):
-        cmds += "\trm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.*"
+        if d.getVar('RM_OBSOLETE_IMAGE', True) == "1":
+            # Remove the obsolete image
+            cmds += "\trm -f `find ${DEPLOY_DIR_IMAGE} -maxdepth 1 -type l -name ${IMAGE_LINK_NAME}'.*' -exec readlink -f {} \;`"
+        # Remove the symlink
+        cmds += "\n\trm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.*"
 
     for type in types:
         ccmd = []
diff --git a/meta/conf/local.conf.sample.extended b/meta/conf/local.conf.sample.extended
index 1d1a8ec..efe0804 100644
--- a/meta/conf/local.conf.sample.extended
+++ b/meta/conf/local.conf.sample.extended
@@ -207,3 +207,6 @@
 #ARCHIVER_MODE[filter] ?= "no"
 #ARCHIVER_CLASS = "${@'archive-${ARCHIVER_MODE}-source' if ARCHIVER_MODE != 'none' else ''}"
 #INHERIT += "${ARCHIVER_CLASS}"
+
+# Remove the obsolete image before the new one generated to save disk space
+#RM_OBSOLETE_IMAGE = "1"
-- 
1.8.1.2