if [[ -z "${IGNORE_DIRTY_TREE}" ]] && [[ -n "$(git status --porcelain 2>/dev/null)" ]]; then
    BUILD_GIT_REVISION=${BUILD_GIT_REVISION}"-dirty"
  fi
else
  BUILD_GIT_REVISION=unknown
fi

# Check for local changes
tree_status="Clean"
if [[ -z "${IGNORE_DIRTY_TREE}" ]] && ! git diff-index --quiet HEAD --; then
  tree_status="Modified"
fi

GIT_DESCRIBE_TAG=$(git describe --tags --always)

# combination, leaving the resulting tree in ../../go-${GOOS}-${GOARCH}-bootstrap.
# That tree can be copied to a machine of the given target type
# and used as $GOROOT_BOOTSTRAP to bootstrap a local build.
#
# Only changes that have been committed to Git (at least locally,
# not necessary reviewed and submitted to master) are included in the tree.
#
# See also golang.org/x/build/cmd/genbootstrap, which is used