nixpkgs/pkgs/development/tools/electron/print-hashes.sh

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#!/usr/bin/env bash
set -eu -o pipefail
if [[ $# -lt 1 ]]; then
echo "$0: version" >&2
exit 1
fi
VERSION=$1
declare -A SYSTEMS HASHES
SYSTEMS=(
[i686-linux]=linux-ia32
[x86_64-linux]=linux-x64
[armv7l-linux]=linux-armv7l
[aarch64-linux]=linux-arm64
[x86_64-darwin]=darwin-x64
[aarch64-darwin]=darwin-arm64
)
hashfile="$(nix-prefetch-url --print-path "https://github.com/electron/electron/releases/download/v${VERSION}/SHASUMS256.txt" 2>/dev/null | tail -n1)"
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headers="$(nix-prefetch-url "https://atom.io/download/electron/v${VERSION}/node-v${VERSION}-headers.tar.gz")"
# Entry similar to the following goes in default.nix:
echo " electron_${VERSION%%.*} = mkElectron \"${VERSION}\" {"
for S in "${!SYSTEMS[@]}"; do
hash="$(grep " *electron-v${VERSION}-${SYSTEMS[$S]}.zip$" "$hashfile"|cut -f1 -d' ' || :)"
if [[ -n $hash ]]; then
echo " $S = \"$hash\";"
fi
done
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echo " headers = \"$headers\";"
echo " };"