Add -p option to cherry-pick a patchset

This patch adds the -p/--patchset option to cherry-pick
a patchset on the top of a coreboot tag or commit. The patchset
should be submitted for review (not necessarily merged) to
the gerrit owned by coreboot.org.

build.sh

@@ -25,6 +25,7 @@ usage()
   echo "  -c, --commit <commit>        Git commit hash"
   echo "  -h, --help                   Show this help"
   echo "  -i, --config                 Execute with interactive make config"
+  echo "  -p, --patchset <patchset>    Cherry-pick a patch set which is not merged yet"
   echo "  -t, --tag <tag>              Git tag/version"
   echo
   echo "If a tag, commit or bleeding-edge flag is not given, the latest Coreboot release will be built."
@@ -55,6 +56,9 @@ do
       -i | --config)
         COREBOOT_CONFIG=true
         shift 1;;
+      -p | --patchset)
+        COREBOOT_PATCHSET="$2"
+        shift 2;;
       -t | --tag)
         COREBOOT_TAG="$2"
         shift 2;;
@@ -93,6 +97,7 @@ docker run --rm -it \
     -v "$PWD/$MODEL:$DOCKER_SCRIPT_DIR" \
     -v "$PWD/common:$DOCKER_COMMON_SCRIPT_DIR" \
     -e COREBOOT_COMMIT="$COREBOOT_COMMIT" \
+    -e COREBOOT_PATCHSET="$COREBOOT_PATCHSET" \
     -e COREBOOT_TAG="$COREBOOT_TAG" \
     -e COREBOOT_CONFIG="$COREBOOT_CONFIG" \
     coreboot/coreboot-sdk:"$COREBOOT_SDK_VERSION" \

common/download_coreboot.sh

@@ -60,6 +60,20 @@ function checkoutCommit() {
 }
 ################################################################################
 
+################################################################################
+## Cherry-pick a patchset
+################################################################################
+function cherryPickPatchset() {
+  cd "$DOCKER_COREBOOT_DIR" || exit
+
+  # Workaround git complaining about unset email
+  git config --global user.email "dummys@docker.com" && git config --global user.name "skull.docker"
+
+  git fetch "https://review.coreboot.org/coreboot" "$COREBOOT_PATCHSET" || exit
+  git cherry-pick FETCH_HEAD  || exit
+
+  git submodule update --recursive --remote
+}
 
 ################################################################################
 ## Download the latest released version of Coreboot
@@ -100,5 +114,9 @@ function downloadOrUpdateCoreboot() {
     gitUpdate
     checkoutTag
   fi
+
+  if [ "$COREBOOT_PATCHSET" ]; then
+    cherryPickPatchset
+  fi
 }
 ################################################################################