From c355ea30383486e74635cd0248d3b53ed9759c39 Mon Sep 17 00:00:00 2001
From: David Kalnischkies <david@kalnischkies.de>
Date: Wed, 5 Nov 2014 18:04:29 +0100
Subject: reenable patchsize limit option for pdiffs

One word: "doh!" Commit f6d4ab9ad8a2cfe52737ab620dd252cf8ceec43d
disabled the check to prevent apt from downloading bigger patches
than the index it tries to patch. Happens rarly of course, but still.
Detected by scan-build complaining about a dead assignment.
To make up for the mistake a test is included as well.
---
 apt-pkg/acquire-item.cc           |  2 +-
 test/integration/test-pdiff-usage | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/apt-pkg/acquire-item.cc b/apt-pkg/acquire-item.cc
index 605ca7ae4..e0aef5874 100644
--- a/apt-pkg/acquire-item.cc
+++ b/apt-pkg/acquire-item.cc
@@ -619,7 +619,7 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)		/*{{{*/
 	 cur != available_patches.end(); ++cur)
       patchesSize += cur->patch_size;
    unsigned long long const sizeLimit = ServerSize * _config->FindI("Acquire::PDiffs::SizeLimit", 100);
-   if (false && sizeLimit > 0 && (sizeLimit/100) < patchesSize)
+   if (sizeLimit > 0 && (sizeLimit/100) < patchesSize)
    {
       if (Debug)
 	 std::clog << "Need " << patchesSize << " bytes (Limit is " << sizeLimit/100
diff --git a/test/integration/test-pdiff-usage b/test/integration/test-pdiff-usage
index 5bad90214..d773dcd66 100755
--- a/test/integration/test-pdiff-usage
+++ b/test/integration/test-pdiff-usage
@@ -180,6 +180,40 @@ SHA256-Patches:
 	testnopackage oldstuff
 	testequal "$(cat ${PKGFILE}-new)
 " aptcache show apt newstuff
+
+	msgmsg "Testcase: pdiff patch bigger than index itself: $*"
+	rm -rf rootdir/var/lib/apt/lists
+	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
+	cp ${PKGFILE}-new aptarchive/Packages
+	compressfile 'aptarchive/Packages'
+	mkdir -p aptarchive/Packages.diff
+	PATCHFILE="aptarchive/Packages.diff/$(date +%Y-%m-%d-%H%M.%S)"
+	diff -e ${PKGFILE} ${PKGFILE}-new > ${PATCHFILE} || true
+	cat $PATCHFILE | gzip > ${PATCHFILE}.gz
+	PATCHINDEX='aptarchive/Packages.diff/Index'
+	echo "SHA1-Current: $(sha1sum ${PKGFILE}-new | cut -d' ' -f 1) $(stat -c%s ${PKGFILE}-new)
+SHA1-History:
+ 9f4148e06d7faa37062994ff10d0c842d7017513 33053002 2010-08-18-2013.28
+ $(sha1sum $PKGFILE | cut -d' ' -f 1) $(stat -c%s $PKGFILE) $(basename $PATCHFILE)
+SHA1-Patches:
+ 7651fc0ac57cd83d41c63195a9342e2db5650257 19722 2010-08-18-2013.28
+ $(sha1sum $PATCHFILE | cut -d' ' -f 1) $(stat -c%s $PATCHFILE)000 $(basename $PATCHFILE)
+SHA256-Current: $(sha256sum ${PKGFILE}-new | cut -d' ' -f 1) $(stat -c%s ${PKGFILE}-new)
+SHA256-History:
+ 01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b 33053002 2010-08-18-2013.28
+ $(sha256sum $PKGFILE | cut -d' ' -f 1) $(stat -c%s $PKGFILE) $(basename $PATCHFILE)
+SHA256-Patches:
+ e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 19722 2010-08-18-2013.28
+ $(sha256sum $PATCHFILE | cut -d' ' -f 1) $(stat -c%s $PATCHFILE)000 $(basename $PATCHFILE)" > $PATCHINDEX
+	generatereleasefiles '+1hour'
+	signreleasefiles
+	#find aptarchive -name 'Packages*' -type f -delete
+	testsuccess aptget update -o Debug::pkgAcquire::Diffs=1 "$@"
+	cp -f rootdir/tmp/testsuccess.output rootdir/tmp/aptgetupdate.output
+	testsuccess grep 'bytes (Limit is' rootdir/tmp/aptgetupdate.output
+	testnopackage oldstuff
+	testequal "$(cat ${PKGFILE}-new)
+" aptcache show apt newstuff
 }
 echo 'Debug::pkgAcquire::Diffs "true";
 Debug::Acquire::Transaction "true";
-- 
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