[Buildroot] [PATCH v2] support/scripts/apply-patches.sh: do not apply patches with renames

[Thomas Petazzoni]

Patches with renames apply properly with patch >= 2.7, but not with
older patch versions. Since "git format-patch" by default generates
patches with renames, Buildroot developers often don't realize that
their patches will not apply properly on build machines that have
patch < 2.7. In order to prevent such a situation from happening
again, this commit adds some logic in apply-patches.sh to refuse
applying patches that contain renames.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
---
Changes since v1:
 - Use "&&" for the "grep -q && grep -q" condition, as noticed by Yann
   E. Morin.
---
 support/scripts/apply-patches.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/support/scripts/apply-patches.sh b/support/scripts/apply-patches.sh
index 7ccb39d..0c24175 100755
--- a/support/scripts/apply-patches.sh
+++ b/support/scripts/apply-patches.sh
@@ -113,6 +113,11 @@ function apply_patch {
         echo "  to be applied  : ${path}/${patch}"
         exit 1
     fi
+    if grep -q "^rename from" ${path}/${patch} && \
+       grep -q "^rename to" ${path}/${patch} ; then
+	echo "Error: patch contains some renames, not supported by old patch versions"
+	exit 1
+    fi
     echo "${path}/${patch}" >> ${builddir}/.applied_patches_list
     ${uncomp} "${path}/$patch" | patch -g0 -p1 -E -d "${builddir}" -t -N $silent
     if [ $? != 0 ] ; then
-- 
2.9.4