Store kernel locally to slim down the image, add script to run container

container.sh

+#!/bin/bash
+
+IMAGE_TAG="$(date +"%Y-%m-%d")_media_build"
+
+case "$1" in
+  run)
+    if [ ! "$2" ]; then
+      echo "Usage: $0 run IMAGE_TAG"
+      exit 1
+    fi
+    docker run -it \
+    --mount type=bind,source="$(pwd)"/custom_data/env.sh,destination=/build-scripts/env.sh,readonly \
+    --mount type=bind,source="$(pwd)"/kernel,destination=/build-scripts/media-git \
+    "$2" \
+    /bin/bash
+    ;;
+  build)
+    mkdir -p custom_data
+    cat > custom_data/env.sh << EOF
+myrepo=git://linuxtv.org/hverkuil/media_tree.git
+name="Example Name"
+email="example@mail.com"
+EOF
+    if [ ! -d kernel ]; then
+      ./prepare_kernel.sh
+    fi
+    docker build -t $IMAGE_TAG .
+    ;;
+  *)
+    echo "Usage: $0 {run IMAGE_TAG|build}"
+    exit 1
+esac
+

prepare_kernel.sh

+#!/bin/bash
+
+git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git kernel
+cd kernel
+git remote add media_tree git://linuxtv.org/media_tree.git
+git remote add media_stage git://linuxtv.org/media_stage.git