From a8d4ffe20d7dec606761cccfc870320e0a235544 Mon Sep 17 00:00:00 2001
From: Justin Cormack <justin.cormack@docker.com>
Date: Wed, 6 Apr 2016 10:50:20 +0100
Subject: [PATCH] fallback to alpine distfiles if upstream source has gone
 missing, fix #70

Signed-off-by: Justin Cormack <justin.cormack@docker.com>
---
 licensing/license.sh | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/licensing/license.sh b/licensing/license.sh
index be4eea27e..a68dfd4f4 100755
--- a/licensing/license.sh
+++ b/licensing/license.sh
@@ -1,6 +1,15 @@
 #!/bin/bash
 
-fail() {
+fetch () {
+  wget $1
+  [ $? == 0 ] && exit 0
+  # try at archive if original source fails
+  BASE=$(basename $1)
+  # distfiles are split as v3.3, not v3.3.3
+  # edge is not available but should always be upstream
+  ALPINE=$(cat /hostetc/alpine-release | sed 's/^\([0-9][0-9]*\.[0-9][0-9]*\).*$/\1/')
+  wget http://distfiles.alpinelinux.org/distfiles/v${ALPINE}/$BASE
+  [ $? == 0 ] && exit 0
   printf "\e[31m$1 \e[0m\n"
   exit 1
 }
@@ -46,9 +55,8 @@ do
               then
                 cp -a $f "$srcdir"/$pkgname-$pkgver/
               else
-                cd "$srcdir"/$pkgname-$pkgver && \
-                wget $f || fail "Cannot retrieve $f"  && \
-                cd -
+                ( cd "$srcdir"/$pkgname-$pkgver && \
+                fetch $f )
               fi
 	  fi
         done