[RFC PATCH] scripts/checkpatch: roll diff tweaking into checkpatch itself

["Alex Bennée" <alex.bennee@linaro.org>]

Rather than relying on external tweaks lets just do it inside
checkpatch's direct commitish handling which is QEMU specific code
anyway.

Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 .gitlab-ci.d/static_checks.yml | 3 ---
 .patchew.yml                   | 3 ---
 scripts/checkpatch.pl          | 7 ++++++-
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/.gitlab-ci.d/static_checks.yml b/.gitlab-ci.d/static_checks.yml
index 7e685c6a65..c5fa4fce26 100644
--- a/.gitlab-ci.d/static_checks.yml
+++ b/.gitlab-ci.d/static_checks.yml
@@ -4,9 +4,6 @@ check-patch:
   needs:
     job: amd64-centos8-container
   script:
-    - git config --local diff.renamelimit 0
-    - git config --local diff.renames True
-    - git config --local diff.algorithm histogram
     - .gitlab-ci.d/check-patch.py
   variables:
     GIT_DEPTH: 1000
diff --git a/.patchew.yml b/.patchew.yml
index 2638b7f564..1b78262ce5 100644
--- a/.patchew.yml
+++ b/.patchew.yml
@@ -138,9 +138,6 @@ testing:
       script: |
         #!/bin/bash
         git rev-parse base > /dev/null || exit 0
-        git config --local diff.renamelimit 0
-        git config --local diff.renames True
-        git config --local diff.algorithm histogram
         ./scripts/checkpatch.pl --mailback base..
     docker-mingw@fedora:
       enabled: true
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index bbcd25ae05..cb8eff233e 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -399,7 +399,12 @@ if ($chk_branch) {
 	my $num_patches = @patches;
 	for my $hash (@patches) {
 		my $FILE;
-		open($FILE, '-|', "git", "show", "--patch-with-stat", $hash) ||
+		open($FILE, '-|', "git",
+                     "-c", "diff.renamelimit=0",
+                     "-c", "diff.renames=True",
+                     "-c", "diff.algorithm=histogram",
+                     "show",
+                     "--patch-with-stat", $hash) ||
 			die "$P: git show $hash - $!\n";
 		while (<$FILE>) {
 			chomp;
-- 
2.20.1