shfmt-format.sh

#!/usr/bin/env bash

set -euo pipefail

SHFMT="$(readlink "$shfmt_path")"
REPO_PATH="$(dirname "$(readlink "$WORKSPACE")")"
cd"$REPO_PATH"

SHFMT_CHECK="${SHFMT_CHECK:-}"

SHFMT_ARGS=(
 --indent 4 # Indent: 0 for tabs (default), >0 for number of spaces.
 --binary-next-line # Binary ops like && and | may start a line.
 --case-indent # Switch cases will be indented.
)

if [ "$SHFMT_CHECK"=="1" ];then
# When checking, error if formatting is needed and print diff
 SHFMT_ARGS+=(--diff)
else
 SHFMT_ARGS+=(--write)
fi

# List all tracked files ending in '.sh' and run formatter
# (note: we use comm to remove files still-tracked but staged for deletion)
if! comm -23 <(git ls-files | sort)<(git ls-files --deleted | sort) \
| grep '.sh$'| xargs "$SHFMT""${SHFMT_ARGS[@]}";then
if [ "$SHFMT_CHECK"=="1" ];then
 cat >&2<<EOF

[-] Linting Bash script failed
 Please run the following command to fix it:
 $ bazel run //:shfmt-format
EOF
fi
exit 1
fi