[OE-core] [PATCH v4 3/4] standard: append md5 tag only if not already present

[leonardo.sandoval.gonzalez at linux.intel.com]

From: Leonardo Sandoval <leonardo.sandoval.gonzalez at linux.intel.com>

In case the proposed md5 tag to be appended is already present,
do not append it.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez at linux.intel.com>
---
 scripts/lib/devtool/standard.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/scripts/lib/devtool/standard.py b/scripts/lib/devtool/standard.py
index 7e342e7687..8b6ab9ff16 100644
--- a/scripts/lib/devtool/standard.py
+++ b/scripts/lib/devtool/standard.py
@@ -700,8 +700,11 @@ 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):
-- 
2.12.0