From 359b1467a29895747adb55d053d0785782547a89 Mon Sep 17 00:00:00 2001
From: Vidar Holen <spam@vidarholen.net>
Date: Wed, 24 Oct 2018 20:33:52 -0700
Subject: [PATCH] Work around snap's old cabal + new snapcraft proxy.

---
 .snapsquid.conf     | 14 ++++++++++++++
 snap/snapcraft.yaml |  9 ++++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 .snapsquid.conf

diff --git a/.snapsquid.conf b/.snapsquid.conf
new file mode 100644
index 0000000..205c1a6
--- /dev/null
+++ b/.snapsquid.conf
@@ -0,0 +1,14 @@
+# In 2015, cabal-install had a http bug triggered when proxies didn't keep
+# the connection open. This version made it into Ubuntu Xenial as used by
+# Snapcraft. In June 2018, Snapcraft's proxy started triggering this bug.
+#
+#     https://bugs.launchpad.net/launchpad-buildd/+bug/1797809
+#
+# Workaround: add more proxy
+
+visible_hostname localhost
+http_port 8888
+cache_peer 10.10.10.1 parent 8222 0 no-query default
+cache_peer_domain localhost !.internal
+http_access allow all
+
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
index b7f0e96..9c50293 100644
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -37,9 +37,16 @@ parts:
     source: ./
     build-packages:
       - cabal-install
+      - squid3
     build: |
+      # See comments in .snapsquid.conf
+      [ "$http_proxy" ] && {
+        squid3 -f .snapsquid.conf
+        export http_proxy="http://localhost:8888"
+        sleep 3
+      }
       cabal sandbox init
-      cabal update
+      cabal update || cat /var/log/squid/*
       cabal install -j
     install: |
       install -d $SNAPCRAFT_PART_INSTALL/usr/bin