From a6fc3b46fc9d282e78c873f947416479257af364 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Fri, 12 Dec 2008 00:04:21 +0000
Subject: [PATCH] Fix --getbinpkgonly behavior so that binaries from the remote
 server are preferred over local packages if they are not identical. Thanks to
 Lance Albertson <ramereth@g.o> for reporting.

svn path=/main/trunk/; revision=12207
---
 man/emerge.1                 |  6 ++----
 pym/_emerge/__init__.py      | 17 ++++++++++++-----
 pym/portage/dbapi/bintree.py | 37 +++++++++++++++++++++++++++++++++++-
 3 files changed, 50 insertions(+), 10 deletions(-)

diff --git a/man/emerge.1 b/man/emerge.1
index f113ebd3b..4dc8f587b 100644
--- a/man/emerge.1
+++ b/man/emerge.1
@@ -320,10 +320,8 @@ list.  This option implies \fB\-k\fR.  (Use \fB\-gK\fR for binary\-only
 merging.)
 .TP
 .BR "\-\-getbinpkgonly " (\fB\-G\fR)
-This option is identical to \fB\-g\fR, as above, except it will not use ANY 
-information from the local machine.  All binaries will be downloaded from the 
-remote server without consulting packages existing in the local packages 
-directory.
+This option is identical to \fB\-g\fR, as above, except binaries from the
+remote server are preferred over local packages if they are not identical.
 .TP
 .BR "\-\-ignore-default-opts"
 Causes \fIEMERGE_DEFAULT_OPTS\fR (see \fBmake.conf\fR(5)) to be ignored.
diff --git a/pym/_emerge/__init__.py b/pym/_emerge/__init__.py
index 81f0f3667..d416bb6b3 100644
--- a/pym/_emerge/__init__.py
+++ b/pym/_emerge/__init__.py
@@ -3409,7 +3409,18 @@ class BinpkgFetcher(SpawnProcess):
 		settings = bintree.settings
 		use_locks = "distlocks" in settings.features
 		pkg_path = self.pkg_path
-		resume = os.path.exists(pkg_path)
+
+		portage.util.ensure_dirs(os.path.dirname(pkg_path))
+		if use_locks:
+			self.lock()
+		exists = os.path.exists(pkg_path)
+		resume = exists and os.path.basename(pkg_path) in bintree.invalids
+		if not resume:
+			# Remove existing file or broken symlink.
+			try:
+				os.unlink(pkg_path)
+			except OSError:
+				pass
 
 		# urljoin doesn't work correctly with
 		# unrecognized protocols like sftp
@@ -3441,10 +3452,6 @@ class BinpkgFetcher(SpawnProcess):
 		fetch_args = [portage.util.varexpand(x, mydict=fcmd_vars) \
 			for x in shlex.split(fcmd)]
 
-		portage.util.ensure_dirs(os.path.dirname(pkg_path))
-		if use_locks:
-			self.lock()
-
 		if self.fd_pipes is None:
 			self.fd_pipes = {}
 		fd_pipes = self.fd_pipes
diff --git a/pym/portage/dbapi/bintree.py b/pym/portage/dbapi/bintree.py
index 2b0ebd6f4..0fa2db06a 100644
--- a/pym/portage/dbapi/bintree.py
+++ b/pym/portage/dbapi/bintree.py
@@ -407,7 +407,7 @@ class binarytree(object):
 		if (not os.path.isdir(self.pkgdir) and not getbinpkgs):
 			return 0
 
-		if not getbinpkgsonly:
+		if True:
 			pkg_paths = {}
 			self._pkg_paths = pkg_paths
 			dirs = listdir(self.pkgdir, dirsonly=True, EmptyOnError=True)
@@ -689,6 +689,32 @@ class binarytree(object):
 				for cpv in self._remotepkgs:
 					self.dbapi.cpv_inject(cpv)
 				self.populated = 1
+				if getbinpkgsonly:
+					# Remote package instances override local package
+					# if they are not identical.
+					hash_names = ["SIZE"] + self._pkgindex_hashes
+					for cpv, local_metadata in metadata.iteritems():
+						remote_metadata = self._remotepkgs.get(cpv)
+						if remote_metadata is None:
+							continue
+						# Use digests to compare identity.
+						identical = True
+						for hash_name in hash_names:
+							local_value = local_metadata.get(hash_name)
+							if local_value is None:
+								continue
+							remote_value = remote_metadata.get(hash_name)
+							if remote_value is None:
+								continue
+							if local_value != remote_value:
+								identical = False
+								break
+						if identical:
+							del self._remotepkgs[cpv]
+				else:
+					# Local package instances override remote instances.
+					for cpv in metadata:
+						self._remotepkgs.pop(cpv, None)
 				return
 			self._remotepkgs = {}
 			try:
@@ -835,6 +861,11 @@ class binarytree(object):
 			if pkgindex_lock:
 				unlockfile(pkgindex_lock)
 
+		if self._remotepkgs is not None:
+			# When a remote package is downloaded and injected,
+			# update state so self.isremote() returns False.
+			self._remotepkgs.pop(cpv, None)
+
 	def _pkgindex_entry(self, cpv):
 		"""
 		Performs checksums and evaluates USE flag conditionals.
@@ -975,6 +1006,10 @@ class binarytree(object):
 		downloaded (or it is only partially downloaded)."""
 		if self._remotepkgs is None or pkgname not in self._remotepkgs:
 			return False
+		if self._remote_has_index:
+			# Presence in self._remotepkgs implies that it's remote. When a
+			# package is downloaded, state is updated by self.inject().
+			return True
 		pkg_path = self.getname(pkgname)
 		if os.path.exists(pkg_path) and \
 			os.path.basename(pkg_path) not in self.invalids:
-- 
2.26.2