Add `read_gns_readme` function.

* gd_diff.py (read_gns_readme): New function.
* tests/test_gd_diff.py (test_read_gns_readme): Test for
`read_gns_readme` function.

1 files changed, 13 insertions, 0 deletions

diff --git a/gd_diff.py b/gd_diff.py
index 225b29e..4709d30 100644
--- a/gd_diff.py
+++ b/gd_diff.py
@@ -130,3 +130,16 @@ def slurp_all_gns_readmes(release, pkgs, local_dir):
             pkgs_noreadmes.append(pkg)
 
     return pkgs_noreadmes
+
+
+def read_gns_readme(release, pkg, local_dir):
+    """Returns content of README.gNewSense for `pkg`.
+
+    If `README.gNewSense` does not exists for `pkg`, None is returned.
+
+    """
+    readme_path = path.join(local_dir, release, pkg, 'debian',
+                            'README.gNewSense')
+    readme_content = read_file(readme_path)
+
+    return readme_content