| 1 | #!/usr/bin/env bash
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| 2 |
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| 3 | # on NixOS: -U
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| 4 | # on macOS: -p
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| 5 | UNIV_OPT=$(if echo '' | shasum -U > /dev/null 2>&1; then echo '-U'; elif echo '' | shasum -p > /dev/null 2>&1; then echo '-p'; else echo ''; fi);
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| 6 |
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| 7 | check_file_in=$(echo "$@" | awk -v RS=' -' '/(c|-check) / {print $2}')
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| 8 | # TODO: right now, we are only accepting input on stdin.
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| 9 | # If we parse all the command line args, we could use something
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| 10 | # like the following, except the file wouldn't necessarily be $1.
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| 11 | #shasum "$UNIV_OPT" -a 1 -c "$check_file_out" < "${1:-/dev/stdin}"
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| 12 |
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| 13 | if [ -f "$check_file_in" ]; then
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| 14 | check_file_out=$(mktemp -q)
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| 15 | hash_value=$(awk '{print $1}' "$check_file_in")
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| 16 | if [[ "$UNIV_OPT" -eq "-U" ]]; then
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| 17 | echo "$hash_value U-" > "$check_file_out"
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| 18 | elif [[ "$UNIV_OPT" -eq "-p" ]]; then
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| 19 | echo "$hash_value ?-" > "$check_file_out"
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| 20 | else
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| 21 | echo "$hash_value -" > "$check_file_out"
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| 22 | fi
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| 23 |
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| 24 | shasum "$UNIV_OPT" -a 1 -c "$check_file_out" < /dev/stdin
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| 25 | else
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| 26 | shasum "$UNIV_OPT" -a 1 | sed 's/\ .-/ ?-/' < /dev/stdin
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| 27 | fi
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