[gentoo-portage-dev] [PATCH] repoman: filter out duplicate dependencies in error messages

[Mike Frysinger <vapier@gentoo.org>]

Some packages list the same atom multiple times (e.g. behind diff USE
flags).  If one of them throws an error, we end up listing it more than
once, and the output can get verbose/useless.
---
 pym/repoman/scanner.py | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/pym/repoman/scanner.py b/pym/repoman/scanner.py
index d1c10d7..94ada90 100644
--- a/pym/repoman/scanner.py
+++ b/pym/repoman/scanner.py
@@ -704,13 +704,22 @@ class Scanner(object):
 
 								# we have some unsolvable deps
 								# remove ! deps, which always show up as unsatisfiable
-								atoms = [
+								all_atoms = [
 									str(atom.unevaluated_atom)
 									for atom in atoms if not atom.blocker]
 
 								# if we emptied out our list, continue:
-								if not atoms:
+								if not all_atoms:
 									continue
+
+								# Filter out duplicates.  We do this by hand (rather
+								# than use a set) so the order is stable and better
+								# matches the order that's in the ebuild itself.
+								atoms = []
+								for atom in all_atoms:
+									if atom not in atoms:
+										atoms.append(atom)
+
 								if self.options.output_style in ['column']:
 									self.qatracker.add_error(mykey,
 										"%s: %s: %s(%s) %s"
-- 
2.6.2