From cf0c149eff981c58650b3961d20be87018d8d606 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Thu, 16 Apr 2009 22:12:39 +0000
Subject: Add support for repos.conf 'aliases' attribute which allows alias
 substitution in metadata/layout.conf repository references.

svn path=/main/trunk/; revision=13352
---
 man/portage.5                 |  9 ++++++---
 pym/portage/__init__.py       |  7 ++++++-
 pym/portage/dbapi/porttree.py | 16 ++++++++++++++++
 3 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/man/portage.5 b/man/portage.5
index 3a548c0f5..0ac8be92f 100644
--- a/man/portage.5
+++ b/man/portage.5
@@ -559,18 +559,21 @@ performance issues under some circumstances (see \fBbug #124041\fR).
 
 .I Example:
 .nf
+[DEFAULT]
 # make all repositories inherit eclasses from the java\-overlay and
 # java\-experimental repositories, with eclasses from java\-experimental
 # taking precedence over those from java\-overlay
-[DEFAULT]
 eclass\-overrides = java\-overlay java\-experimental
 
-# disable all eclass overrides for ebuilds from the gentoo repository
 [gentoo]
+# disable all eclass overrides for ebuilds from the gentoo repository
 eclass\-overrides =
+# when processing metadata/layout.conf from other repositories, substitute
+# 'gentoo' in place of references to repositories named 'foo' and 'bar'
+aliases = foo bar
 
-# override the metadata/layout.conf masters setting from the kde-testing repo
 [kde-testing]
+# override the metadata/layout.conf masters setting from the kde-testing repo
 masters = gentoo kde
 .fi
 .RE
diff --git a/pym/portage/__init__.py b/pym/portage/__init__.py
index 6fea2b82b..d92330613 100644
--- a/pym/portage/__init__.py
+++ b/pym/portage/__init__.py
@@ -1001,10 +1001,15 @@ def _lazy_iuse_regex(iuse_implicit):
 	return regex
 
 class _local_repo_config(object):
-	__slots__ = ('eclass_overrides', 'masters', 'name',)
+	__slots__ = ('aliases', 'eclass_overrides', 'masters', 'name',)
 	def __init__(self, name, repo_opts):
 		self.name = name
 
+		aliases = repo_opts.get('aliases')
+		if aliases is not None:
+			aliases = tuple(aliases.split())
+		self.aliases = aliases
+
 		eclass_overrides = repo_opts.get('eclass-overrides')
 		if eclass_overrides is not None:
 			eclass_overrides = tuple(eclass_overrides.split())
diff --git a/pym/portage/dbapi/porttree.py b/pym/portage/dbapi/porttree.py
index 246a0d6f1..c07cf4ff2 100644
--- a/pym/portage/dbapi/porttree.py
+++ b/pym/portage/dbapi/porttree.py
@@ -200,8 +200,23 @@ class portdbapi(dbapi):
 		eclass_dbs = {porttree_root : self.eclassdb}
 		local_repo_configs = self.mysettings._local_repo_configs
 		default_loc_repo_config = None
+		repo_aliases = {}
 		if local_repo_configs is not None:
 			default_loc_repo_config = local_repo_configs.get('DEFAULT')
+			for repo_name, loc_repo_conf in local_repo_configs.iteritems():
+				if loc_repo_conf.aliases is not None:
+					for alias in loc_repo_conf.aliases:
+						overridden_alias = repo_aliases.get(alias)
+						if overridden_alias is not None:
+							writemsg_level(("!!! Alias '%s' " + \
+								"created for '%s' overrides " + \
+								"'%s' alias in " + \
+								"'%s'\n") % (alias, repo_name,
+								overridden_alias,
+								self.mysettings._local_repo_conf_path),
+								level=logging.WARNING, noiselevel=-1)
+						repo_aliases[alias] = repo_name
+
 		for path in self.porttrees:
 			if path in self._repo_info:
 				continue
@@ -228,6 +243,7 @@ class portdbapi(dbapi):
 				masters = layout_data.get('masters', '').split()
 
 			for master_name in masters:
+				master_name = repo_aliases.get(master_name, master_name)
 				master_path = self.treemap.get(master_name)
 				if master_path is None:
 					writemsg_level(("Unavailable repository '%s' " + \
-- 
cgit v1.2.3-1-g7c22