From c82eb02d6423a51852115bbda647fe12e86af673 Mon Sep 17 00:00:00 2001
From: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
Date: Wed, 14 Jul 2021 14:41:40 +0100
Subject: [PATCH] Set section for prerelease debs (#10391)

This is part of fixing #6116: we want to put RC debs into a different place than release debs, so reprepro has to be able to tell them apart.
---
 changelog.d/10391.misc |  1 +
 docker/build_debian.sh | 14 ++++++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 changelog.d/10391.misc

diff --git a/changelog.d/10391.misc b/changelog.d/10391.misc
new file mode 100644
index 0000000000..3f191b520a
--- /dev/null
+++ b/changelog.d/10391.misc
@@ -0,0 +1 @@
+When building Debian packages for prerelease versions, set the Section accordingly.
diff --git a/docker/build_debian.sh b/docker/build_debian.sh
index f426d2b77b..f572ed9aa0 100644
--- a/docker/build_debian.sh
+++ b/docker/build_debian.sh
@@ -15,6 +15,20 @@ cd /synapse/build
 dch -M -l "+$DIST" "build for $DIST"
 dch -M -r "" --force-distribution --distribution "$DIST"
 
+# if this is a prerelease, set the Section accordingly.
+#
+# When the package is later added to the package repo, reprepro will use the
+# Section to determine which "component" it should go into (see
+# https://manpages.debian.org/stretch/reprepro/reprepro.1.en.html#GUESSING)
+
+DEB_VERSION=`dpkg-parsechangelog -SVersion`
+case $DEB_VERSION in
+    *rc*|*a*|*b*|*c*)
+        sed -ie '/^Section:/c\Section: prerelease' debian/control
+        ;;
+esac
+
+
 dpkg-buildpackage -us -uc
 
 ls -l ..
-- 
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