Merge pull request #190 from nathanchance/buildroot-build-all

buildroot: Make it easier to rebuild all of the images after an upgrade/change

Author: nathanchance

buildroot/.gitignore

@@ -1 +1 @@
-build/
+src/

buildroot/buildroot-2019.02.3.tar.gz.sha256

@@ -0,0 +1 @@
+31a0dd7f5df75d20f6b74f0684918b643e5bf08d87dd5f9f02525852eecccf95  buildroot-2019.02.3.tar.gz

buildroot/rebuild.sh

@@ -1,44 +1,79 @@
 #!/usr/bin/env bash
-# Takes the architecture as a parameter
-# Currently supported values: arm64
+# Takes a list of architectures to build images for as the parameter
+
+function download_br() {
+    mkdir -p src
+    TARBALL=buildroot-${BUILDROOT_VERSION}.tar.gz
+    rm -f "${TARBALL}"
+    curl -LO https://buildroot.org/downloads/"${TARBALL}"
+    if ! sha256sum --quiet -c "${TARBALL}".sha256; then
+        echo "Downloaded tarball's hash does not match known good one! Please try redownloading."
+        exit 1
+    fi
+    tar -xzf "${TARBALL}" -C src --strip-components=1
+    rm -f "${TARBALL}"
+}
 
 # Make sure we don't have any unset variables
 set -u
 
-# Clean up
-rm -rf build
-mkdir -p build
+# Move into the folder that contains this script
+cd "$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")" || exit 1
+
+# Generate list of configs to build
+CONFIGS=()
+while (( ${#} )); do
+    case ${1} in
+        all) for CONFIG in *.config; do CONFIGS+=( "../${CONFIG}" ); done ;;
+        arm64|arm|ppc32|ppc64le|x86_64) CONFIGS+=( "../${1}.config" ) ;;
+        *) echo "Unknown parameter '${1}', exiting!"; exit 1 ;;
+    esac
+    shift
+done
 
 # Download latest buildroot release
-curl https://buildroot.org/downloads/buildroot-2019.02.3.tar.gz | tar -xzf - -C build --strip-components=1
-cd build || exit 1
-
-# Use the config in the parent folder
-CONFIG=../${1}.config
-if [[ ! -f ${CONFIG} ]]; then
-    echo "${CONFIG} does not exist! Is your parameter correct?"
-    exit 1
-fi
-BR2_DEFCONFIG=${CONFIG} make defconfig
-if [[ -n ${EDITCONFIG:-} ]]; then
-    make menuconfig
-    make savedefconfig
+BUILDROOT_VERSION=2019.02.3
+if [[ -d src ]]; then
+    if [[ $(cd src && make print-version | cut -d - -f 1 2>/dev/null) != "${BUILDROOT_VERSION}" ]]; then
+        rm -rf src
+        download_br
+    fi
+else
+    download_br
 fi
+cd src || exit 1
 
-# Build images
-make -j"$(nproc)"
+# Build the images for the architectures requested
+for CONFIG in "${CONFIGS[@]}"; do
+    # Clean up artifacts from the last build
+    make clean
 
-# Make sure images folder exists
-IMAGES_FOLDER=../../images/${1}
-[[ ! -d ${IMAGES_FOLDER} ]] && mkdir -p "${IMAGES_FOLDER}"
-
-# Copy new images
-# Make sure images exist before moving them
-IMAGES=( "output/images/rootfs.cpio" "output/images/rootfs.ext4" )
-for IMAGE in "${IMAGES[@]}"; do
-    if [[ ! -f ${IMAGE} ]]; then
-        echo "${IMAGE} could not be found! Did the build error?"
-        exit 1
+    BR2_DEFCONFIG=${CONFIG} make defconfig
+    if [[ -n ${EDITCONFIG:-} ]]; then
+        make menuconfig
+        make savedefconfig
     fi
-    cp -v "${IMAGE}" "${IMAGES_FOLDER}"
+
+    # Build images
+    make -j"$(nproc)"
+
+    # Get the architecture from the name of the config: ../<arch>.config
+    # basename strips ../
+    # ${CONFIG//.config} strips .config
+    ARCH=$(basename "${CONFIG//.config}")
+
+    # Make sure images folder exists
+    IMAGES_FOLDER=../../images/${ARCH}
+    [[ ! -d ${IMAGES_FOLDER} ]] && mkdir -p "${IMAGES_FOLDER}"
+
+    # Copy new images
+    # Make sure images exist before moving them
+    IMAGES=( "output/images/rootfs.cpio" "output/images/rootfs.ext4" )
+    for IMAGE in "${IMAGES[@]}"; do
+        if [[ ! -f ${IMAGE} ]]; then
+            echo "${IMAGE} could not be found! Did the build error?"
+            exit 1
+        fi
+        cp -v "${IMAGE}" "${IMAGES_FOLDER}"
+    done
 done