git forge of mine

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#!/bin/bash
(return 0 2>/dev/null) && SOURCED="true" || SOURCED="false"
export LC_ALL=C.UTF-8
export LANG=C.UTF-8
set -x
set -e

# Default locations if the var isn't already set
export TOOLS_DIR="${TOOLS_DIR:=/opt}"
export SOURCES_DIR="${SOURCES_DIR:=/sources}"
export BUILD_DIR="${BUILD_DIR:=$SOURCES_DIR/build}"
export OUTPUT_DIR="${OUTPUT_DIR:=$BUILD_DIR/output}"

export BUILD_TYPE=${BUILD_TYPE:=Release}
export GCC_ARM_VER=${GCC_ARM_VER:="gcc-arm-none-eabi-9-2020-q2-update"}
export NRF_SDK_VER=${NRF_SDK_VER:="nRF5_SDK_15.3.0_59ac345"}

MACHINE="$(uname -m)"
[[ "$MACHINE" == "arm64" ]] && MACHINE="aarch64"

main() {
  local target="$1"

  mkdir -p "$TOOLS_DIR"
  
  [[ ! -d "$TOOLS_DIR/$GCC_ARM_VER" ]] && GetGcc
  [[ ! -d "$TOOLS_DIR/$NRF_SDK_VER" ]] && GetNrfSdk
  [[ ! -d "$TOOLS_DIR/mcuboot" ]] && GetMcuBoot

  mkdir -p "$BUILD_DIR"

  CmakeGenerate
  CmakeBuild $target
  BUILD_RESULT=$? 
  if [ "$DISABLE_POSTBUILD" != "true" -a "$BUILD_RESULT" == 0 ]; then
    source "$BUILD_DIR/post_build.sh"
  fi
}

GetGcc() {
  GCC_SRC="$GCC_ARM_VER-$MACHINE-linux.tar.bz"
  wget -q https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2020q2/$GCC_SRC -O - | tar -xj -C $TOOLS_DIR/
}

GetMcuBoot() {
  git clone https://github.com/JuulLabs-OSS/mcuboot.git "$TOOLS_DIR/mcuboot"
  pip3 install -r "$TOOLS_DIR/mcuboot/scripts/requirements.txt"
}

GetNrfSdk() {
  wget -q "https://developer.nordicsemi.com/nRF5_SDK/nRF5_SDK_v15.x.x/$NRF_SDK_VER.zip" -O /tmp/$NRF_SDK_VER
  unzip -q /tmp/$NRF_SDK_VER -d "$TOOLS_DIR/"
  rm /tmp/$NRF_SDK_VER
}

CmakeGenerate() {
  # We can swap the CD and trailing SOURCES_DIR for -B and -S respectively
  # once we go to newer CMake (Ubuntu 18.10 gives us CMake 3.10)
  cd "$BUILD_DIR"

  cmake -G "Unix Makefiles" \
    -DCMAKE_BUILD_TYPE=$BUILD_TYPE \
    -DUSE_OPENOCD=1 \
    -DARM_NONE_EABI_TOOLCHAIN_PATH="$TOOLS_DIR/$GCC_ARM_VER" \
    -DNRF5_SDK_PATH="$TOOLS_DIR/$NRF_SDK_VER" \
    "$SOURCES_DIR"
  cmake -L -N .
}

CmakeBuild() {
  local target="$1"
  [[ -n "$target" ]] && target="--target $target"
  if cmake --build "$BUILD_DIR" --config $BUILD_TYPE $target -- -j$(nproc)
    then return 0; else return 1; 
  fi
}

[[ $SOURCED == "false" ]] && main "$@" || echo "Sourced!"
InfiniTime.git
