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#!/usr/bin/env bash
#
# Generate module index header
#
set -euo pipefail
if [[ "$#" -lt 2 ]]; then
echo "Usage: genmoduleindex.sh ModuleBinaryFile IndexHeaderFile"
exit 1
fi
function printIdAsBinary() {
id="$1"
# Print length in bytes
bytesLength="${#id}"
printf "0x%02x, " "$((bytesLength/2))"
# Print each pair of hex digits with 0x prefix followed by a comma
while [[ "$id" ]]; do
printf '0x%s, ' "${id:0:2}"
id=${id:2}
done
}
case "$(uname -s)" in
Darwin)
cmd="dwarfdump -u $1"
pattern='^UUID: ([0-9A-Fa-f\-]+)';;
*)
cmd="readelf -n $1"
pattern='^[[:space:]]*Build ID: ([0-9A-Fa-f\-]+)';;
esac
while read -r line; do
if [[ "$line" =~ $pattern ]]; then
printIdAsBinary "${BASH_REMATCH[1]//-/}"
break
fi
done < <(eval "$cmd") > "$2"
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