add generate patch script

Signed-off-by: renoseven <dev@renoseven.net>

generate_patches.sh

@@ -0,0 +1,55 @@
+#!/bin/bash -e
+readonly ROOT_DIR="$(dirname $(readlink -f ${BASH_SOURCE[0]}))"
+
+readonly SPEC_FILE="$(find . -name '*.spec' | head -n 1)"
+readonly REPO_NAME="$(basename ${SPEC_FILE} | sed 's/.spec//')"
+readonly REPO_VERSION="$(grep Version ${SPEC_FILE} | head -n 1 | awk -F ' ' '{print $NF}')"
+readonly REPO_REMOTE="origin"
+
+readonly PKG_NAME="${REPO_NAME}-${REPO_VERSION}"
+readonly PKG_DIR="${ROOT_DIR}/${PKG_NAME}"
+readonly PKG_BRANCH="$(git branch --show-current | sed 's/-LTS.*//')"
+
+echo "Preparing..."
+# clean old files
+rm -f ${ROOT_DIR}/*.patch
+rm -rf ${PKG_DIR}
+
+# extract package
+tar -xf ${PKG_NAME}.tar.gz
+
+# fetch baseline
+pushd ${PKG_DIR} > /dev/null
+readonly PKG_BASELINE=$(git rev-parse --short HEAD)
+popd > /dev/null
+
+echo "------------------------------"
+echo "Name:     ${PKG_NAME}"
+echo "Branch:   ${PKG_BRANCH}"
+echo "Baseline: ${PKG_BASELINE}"
+echo "------------------------------"
+
+echo "Syncing with remote..."
+pushd ${PKG_DIR} > /dev/null
+git fetch ${REPO_REMOTE}
+popd > /dev/null
+
+echo "Generating patches..."
+# format patches
+pushd ${PKG_DIR} > /dev/null
+git checkout -q ${REPO_REMOTE}/${PKG_BRANCH}
+git format-patch -qN -o ${ROOT_DIR} ${PKG_BASELINE}
+popd > /dev/null
+
+# print patch list
+patch_list="$(find ${ROOT_DIR} -maxdepth 1 -name "*.patch" | sort)"
+for patch_file in ${patch_list}; do
+    patch_name="$(basename ${patch_file})"
+    patch_id="$(echo ${patch_name} | awk -F '-' '{print $1}')"
+    echo "Patch${patch_id}: ${patch_name}"
+done
+
+echo "Cleaning up..."
+rm -rf ${PKG_DIR}
+
+echo "Done"