Record sha256sum of other distro source files

If a source points to a local file, get the sha256sum of it and save it
into the field we just added.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

layerindex/tools/import_otherdistro.py

@@ -292,6 +292,12 @@ def update_recipe_file(path, recipe, repodir, raiseexceptions=False):
         existing_ids = list(recipe.source_set.values_list('id', flat=True))
         for src in sources:
             srcobj, _ = Source.objects.get_or_create(recipe=recipe, url=src)
+            if not '://' in src:
+                sourcepath = os.path.join(os.path.dirname(path), src)
+                if os.path.exists(sourcepath):
+                    srcobj.sha256sum = utils.sha256_file(sourcepath)
+                else:
+                    srcobj.sha256sum = ''
             srcobj.save()
             if srcobj.id in existing_ids:
                 existing_ids.remove(srcobj.id)

layerindex/utils.py

@@ -469,6 +469,14 @@ def sanitise_html(html):
 def squashspaces(string):
     return re.sub("\s+", " ", string).strip()
 
+def sha256_file(ifn):
+    import hashlib
+    shash = hashlib.sha256()
+    with open(ifn, 'rb') as f:
+        for line in f:
+            shash.update(line)
+    return shash.hexdigest()
+
 def timesince2(date, date2=None):
     # Based on http://www.didfinishlaunchingwithoptions.com/a-better-timesince-template-filter-for-django/
     if date2 is None: