scripts/get-developers: correct type of patches argument

Current type for 'patches' argument is str. It supposed to only
contain names of files.

If we specify FileType as type, then we don't need to open file ourself
and it allows script to read patch from standard input as well.

e.g.
$ git show -1 | ./support/scripts/get-developers -

Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Rahul Bedarkar <rahul.bedarkar@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

support/scripts/get-developers

@@ -5,8 +5,8 @@ import getdeveloperlib
 
 def parse_args():
     parser = argparse.ArgumentParser()
-    parser.add_argument('patches', metavar='P', type=str, nargs='*',
-                        help='list of patches')
+    parser.add_argument('patches', metavar='P', type=argparse.FileType('r'), nargs='*',
+                        help='list of patches (use - to read patches from stdin)')
     parser.add_argument('-a', dest='architecture', action='store',
                         help='find developers in charge of this architecture')
     parser.add_argument('-p', dest='package', action='store',

support/scripts/getdeveloperlib.py

@@ -16,8 +16,7 @@ def analyze_patch(patch):
     removed by the patch."""
     files = set()
     infras = set()
-    with open(patch, "r") as f:
-        for line in f:
+    for line in patch:
         # If the patch is adding a package, find which infra it is
         m = FIND_INFRA_IN_PATCH.match(line)
         if m: