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{
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closureInfo, runCommand,
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e2fsprogs,
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pigeon-disc-size ? "1G",
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pigeon-toolchain,
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pigeon-init,
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pigeon-run
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}:
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let
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closure = closureInfo { rootPaths = [ pigeon-toolchain ]; };
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in
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runCommand "pigeon-rootfs" { nativeBuildInputs = [ e2fsprogs ]; } ''
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mkdir -p rootfs && cd rootfs
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mkdir -p dev proc sys tmp usr nix/store root/student root/grader root/results
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chmod 700 root
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for FILE in $(cat ${closure}/store-paths); do
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cp -a "$FILE" nix/store
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done
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ln -s ${pigeon-toolchain}/bin bin
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ln -s ${pigeon-toolchain}/bin usr/bin
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install -m 755 ${pigeon-init}/bin/pigeon-init init
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install -m 755 ${pigeon-run}/bin/pigeon-run run
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cd ..
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mkfs.ext4 -q -F -d rootfs $out ${pigeon-disc-size}
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''
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