From a1214525f5816475367be7823ce2454e256205af Mon Sep 17 00:00:00 2001
From: Lubomír Sedlář <lsedlar@redhat.com>
Date: Mar 13 2017 13:45:13 +0000
Subject: unified-iso: Log better error when linking fails


When linking files fails due to target path already existing, we should
print details about the conflict.

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

---

diff --git a/pungi_utils/unified_isos.py b/pungi_utils/unified_isos.py
index 4254ee1..2f47159 100644
--- a/pungi_utils/unified_isos.py
+++ b/pungi_utils/unified_isos.py
@@ -114,7 +114,12 @@ class UnifiedISO(object):
                     new_path = os.path.join(self.temp_dir, "trees", arch, old_relpath)
 
                 makedirs(os.path.dirname(new_path))
-                self.linker.link(old_path, new_path)
+                try:
+                    self.linker.link(old_path, new_path)
+                except OSError as exc:
+                    print("Failed to link %s to %s: %s" % (old_path, new_path, exc.strerror),
+                          file=sys.stderr)
+                    raise
 
     def link_to_temp(self):
         # copy files to new location; change RPM location to $variant_uid