[gnome-continuous-yocto/gnomeostree-3.28-rocko: 7312/8267] devtool: append md5sum only if not already present

[Emmanuele Bassi <ebassi src gnome org>]

commit ee21e81cffa8b7bd976777a46ae51cb87599fed6
Author: Leonardo Sandoval <leonardo sandoval gonzalez linux intel com>
Date:   Mon Aug 21 17:39:46 2017 +1200

    devtool: append md5sum only if not already present
    
    In case the proposed md5sum to be appended to the .devtool_md5 file
    is already present, do not append it.
    
    (From OE-Core rev: f958c5cba3b0d24ca696b2b707857009c9a7b5b8)
    
    Signed-off-by: Leonardo Sandoval <leonardo sandoval gonzalez linux intel com>
    Signed-off-by: Paul Eggleton <paul eggleton linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 scripts/lib/devtool/standard.py |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/scripts/lib/devtool/standard.py b/scripts/lib/devtool/standard.py
index ec19223..fa9d347 100644
--- a/scripts/lib/devtool/standard.py
+++ b/scripts/lib/devtool/standard.py
@@ -674,8 +674,11 @@ def _add_md5(config, recipename, filename):
 
     def addfile(fn):
         md5 = bb.utils.md5_file(fn)
-        with open(os.path.join(config.workspace_path, '.devtool_md5'), 'a') as f:
-            f.write('%s|%s|%s\n' % (recipename, os.path.relpath(fn, config.workspace_path), md5))
+        with open(os.path.join(config.workspace_path, '.devtool_md5'), 'a+') as f:
+            md5_str = '%s|%s|%s\n' % (recipename, os.path.relpath(fn, config.workspace_path), md5)
+            f.seek(0, os.SEEK_SET)
+            if not md5_str in f.read():
+                f.write(md5_str)
 
     if os.path.isdir(filename):
         for root, _, files in os.walk(filename):