From bbcf8935ce64ed6bdf0cbb883e84d03b43cde05c Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Thu, 30 Apr 2009 06:58:43 +0000
Subject: [PATCH] Add a --repo option, allowing cache to be generated for
 overlays. (trunk r13292)

svn path=/main/branches/2.1.6/; revision=13463
---
 bin/egencache   | 18 +++++++++++++++---
 man/egencache.1 | 10 +++++++---
 2 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/bin/egencache b/bin/egencache
index 487901cf0..47e4ea2c7 100755
--- a/bin/egencache
+++ b/bin/egencache
@@ -34,6 +34,9 @@ def parse_args(args):
 	parser.add_option("--update",
 		action="store_true",
 		help="update metadata/cache/ (generate as necessary)")
+	parser.add_option("--repo",
+		action="store",
+		help="name of repo to operate on (default repo is located at $PORTDIR)")
 	parser.add_option("--cache-dir",
 		help="location of the metadata cache",
 		dest="cache_dir")
@@ -126,7 +129,7 @@ class GenCache(object):
 			max_jobs=max_jobs, max_load=max_load)
 		self.returncode = os.EX_OK
 		metadbmodule = portdb.mysettings.load_best_module("portdbapi.metadbmodule")
-		self._trg_cache = metadbmodule(portdb.porttree_root,
+		self._trg_cache = metadbmodule(portdb.porttrees[0],
 			"metadata/cache", portage.auxdbkeys[:])
 		if rsync:
 			self._trg_cache.raise_stat_collision = True
@@ -259,8 +262,8 @@ def egencache_main(args):
 	# completely controlled by commandline arguments.
 	env = {}
 
-	# TODO: Implement --repo for choosing a repo.
-	env['PORTDIR_OVERLAY'] = ''
+	if options.repo is None:
+		env['PORTDIR_OVERLAY'] = ''
 
 	if options.cache_dir is not None:
 		env['PORTAGE_DEPCACHEDIR'] = options.cache_dir
@@ -300,6 +303,15 @@ def egencache_main(args):
 	settings.lock()
 
 	portdb = portage.portdbapi(settings["PORTDIR"], mysettings=settings)
+	if options.repo is not None:
+		repo_path = portdb.getRepositoryPath(options.repo)
+		if repo_path is None:
+			parser.error("Unable to locate repository named '%s'" % \
+				(options.repo,))
+			return 1
+
+		# Limit ebuilds to the specified repo.
+		portdb.porttrees = [repo_path]
 
 	cp_iter = None
 	if atoms:
diff --git a/man/egencache.1 b/man/egencache.1
index 67b166f9d..dbcc44e4b 100644
--- a/man/egencache.1
+++ b/man/egencache.1
@@ -7,9 +7,7 @@ egencache \- generate metadata cache for ebuild repositories
 .SH "DESCRIPTION"
 The egencache program generates metadata cache for ebuild repositories and
 stores it in the \fImetadata/cache/\fR directory within the repository itself,
-for distribution. Currenly, only the repository located at \fBPORTDIR\fR
-(configured in \fBmake.conf(5)\fR) can be updated by this program, but a
-future version will have the ability to select a different repository.
+for distribution.
 .SH ACTIONS
 .TP
 .BR "\-\-update [ATOM] ... "
@@ -40,6 +38,12 @@ Also see the related \fB\-\-load\-average\fR option.
 .BR \-\-load\-average=LOAD
 Specifies that maximum load allowed when spawning multiple jobs.
 .TP
+.BR "\-\-repo=REPO"
+Name of the repo to operate on (default repo is located at \fBPORTDIR\fR).
+The name should correspond the value of a \fBrepo_name\fR entry (see
+\fBportage\fR(5)) from one of the repositories that is configured via the
+\fBPORTDIR\fR or \fBPORTDIR_OVERLAY\fR variables (see \fBmake.conf\fR(5)).
+.TP
 .BR "\-\-rsync"
 When used together with the \fB\-\-update\fR action, this enables a workaround
 for cases in which the content of a cache entry changes and neither the file
-- 
2.26.2