message: Add ability to choose a git commit of the wpantund during border router installation.
diff: @@ -39,10 +39,17 @@ wpantund_uninstall()
  wpantund_install()
  {
  + CLONE_ARGS=""
  +
  + if [ -z "$WPANTUND_COMMIT" ]; then
  + CLONE_ARGS="--depth 1"
  + fi
  +
  test -d $BUILD_DIR/wpantund || (cd $BUILD_DIR &&
  - git clone --depth 1 https://github.com/openthread/wpantund.git) || die 'Failed to download source code of wpantund!'
  + git clone $CLONE_ARGS https://github.com/openthread/wpantund.git) || die 'Failed to download source code of wpantund!'
  (cd $BUILD_DIR/wpantund &&
  + ((test -n "$WPANTUND_COMMIT" && git reset $WPANTUND_COMMIT --hard) || echo "WPANTUND_COMMIT value has not been set or something went wrong during switching to the set commit.") &&
  (test -f configure || ./bootstrap.sh) &&
  (test -f config.status || ./configure --prefix=/usr --sysconfdir=/etc \
  --disable-ncp-dummy --enable-static-link-ncp-plugin=spinel) &&
  