[gnome-continuous-yocto/gnomeostree-3.28-rocko: 2052/8267] image_types: use COMPRESSIONTYPES variable for backward compatibility

[Emmanuele Bassi <ebassi src gnome org>]

commit e1ab8392d1a683bb8860fbb20d7eff9c56827a14
Author: Ed Bartosh <ed bartosh linux intel com>
Date:   Fri Aug 19 17:35:53 2016 +0300

    image_types: use COMPRESSIONTYPES variable for backward compatibility
    
    Recent renaming of COMPRESSIONTYPES variable can break recipes that
    still use it. Including value of COMPRESSIONTYPES variable into
    CONVERSIONTYPES should prevent this.
    
    (From OE-Core rev: 5b00d9bf5ebf2350e4a4d09b436193efba80a85c)
    
    Signed-off-by: Ed Bartosh <ed bartosh linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/classes/image_types.bbclass |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass
index 4d92866..2e852af 100644
--- a/meta/classes/image_types.bbclass
+++ b/meta/classes/image_types.bbclass
@@ -316,7 +316,13 @@ IMAGE_TYPES = " \
     wic wic.gz wic.bz2 wic.lzma \
 "
 
-CONVERSIONTYPES = "gz bz2 lzma xz lz4 zip sum md5sum sha1sum sha224sum sha256sum sha384sum sha512sum bmap"
+# Compression is a special case of conversion. The old variable
+# names are still supported for backward-compatibility. When defining
+# new compression or conversion commands, use CONVERSIONTYPES and
+# CONVERSION_CMD/DEPENDS.
+COMPRESSIONTYPES ?= ""
+
+CONVERSIONTYPES = "gz bz2 lzma xz lz4 zip sum md5sum sha1sum sha224sum sha256sum sha384sum sha512sum bmap 
${COMPRESSIONTYPES}"
 CONVERSION_CMD_lzma = "lzma -k -f -7 ${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type}"
 CONVERSION_CMD_gz = "gzip -f -9 -c ${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type} > 
${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type}.gz"
 CONVERSION_CMD_bz2 = "pbzip2 -f -k ${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type}"