1 files changed, 51 insertions, 0 deletions
diff --git a/meta-linaro-integration/recipes-devtools/opkg/files/0003-opkg_download-Use-md5sum-of-src-URI-as-cache-file-na.patch b/meta-linaro-integration/recipes-devtools/opkg/files/0003-opkg_download-Use-md5sum-of-src-URI-as-cache-file-na.patch
new file mode 100644
index 00000000..c7e5cdb9
--- /dev/null
+++ b/meta-linaro-integration/recipes-devtools/opkg/files/0003-opkg_download-Use-md5sum-of-src-URI-as-cache-file-na.patch
@@ -0,0 +1,51 @@
+From 2ba39321c686547588745a8ff7d35c6e1965c734 Mon Sep 17 00:00:00 2001
+From: Paul Barker <pa...@paulbarker.me.uk>
+Date: Sat, 24 Oct 2015 20:15:19 +0100
+Subject: [PATCH 3/3] opkg_download: Use md5sum of src URI as cache file name
+
+Source URIs can be very long. The cache directory itself may already have a very
+long path, especially if we're installing packages into an offline rootfs.
+Therefore it's not a good idea to simply tag the source URI onto the cache
+directory path to create a cache file name.
+
+To create shorter cache file names which are deterministic and very likely to be
+unique, we use the md5sum of the source URI.
+
+Signed-off-by: Paul Barker <pa...@paulbarker.me.uk>
+---
+ libopkg/opkg_download.c | 11 ++++++-----
+ 1 file changed, 6 insertions(+), 5 deletions(-)
+
+diff --git a/libopkg/opkg_download.c b/libopkg/opkg_download.c
+index e9b86a5..d270074 100644
+--- a/libopkg/opkg_download.c
++++ b/libopkg/opkg_download.c
+@@ -29,6 +29,7 @@
+ #include "opkg_verify.h"
+ #include "opkg_utils.h"
+ 
++#include "md5.h"
+ #include "sprintf_alloc.h"
+ #include "file_util.h"
+ #include "xfuncs.h"
+@@ -135,12 +136,12 @@ int opkg_download_internal(const char *src, const char *dest,
+  */
+ char *get_cache_location(const char *src)
+ {
+-    char *cache_name = xstrdup(src);
+-    char *cache_location, *p;
++    unsigned char md5sum_bin[16];
++    char *cache_name;
++    char *cache_location;
+ 
+-    for (p = cache_name; *p; p++)
+-        if (*p == '/')
+-            *p = '_';
++    md5_buffer(src, strlen(src), md5sum_bin);
++    cache_name = md5_to_string(md5sum_bin);
+ 
+     sprintf_alloc(&cache_location, "%s/%s", opkg_config->cache_dir, cache_name);
+     free(cache_name);
+-- 
+2.6.1
+