83 lines
1.4 KiB
Bash
Executable file
83 lines
1.4 KiB
Bash
Executable file
#!/usr/bin/env bash
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ssh_command=${SSH_COMMAND-ssh}
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root_prefix=/
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verbose=true
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while [[ $# -gt 0 ]]; do
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case $1 in
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-r|--root)
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root_prefix="$2"
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shift
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shift
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;;
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-q|--quiet)
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verbose=""
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shift
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;;
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-*|--*)
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echo "Unknown option $1"
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exit 1
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;;
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*)
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if test -z "$target_host"; then
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target_host="$1"
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else
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paths+=("$1") # save positional arg
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fi
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shift # past argument
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;;
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esac
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done
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progress() {
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test -n "$verbose" && echo $*
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}
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if [ -z "$target_host" ] ; then
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echo Usage: min-copy-closure [--root /mnt] target-host paths
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exit 1
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fi
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if [ -z "$IN_NIX_BUILD" ] ; then
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# can't run nix-store in a derivation, so we have to
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# skip the requisites when running tests in hydra
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paths=$(nix-store -q --requisites "$paths")
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fi
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needed=""
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coproc remote {
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${ssh_command} -C -T ${target_host}
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}
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exec 10>&${remote[1]}
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for p in $paths; do
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progress -n Checking $(basename $p) ...
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echo "test -e ${root_prefix}$p && echo skip || echo $p" >&10
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read n <&${remote[0]}
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case $n in
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skip)
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progress skip
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;;
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*)
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needed="${needed} $n"
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progress will copy
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;;
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esac
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done
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if test -z "$needed" ; then
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echo Nothing to copy
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exit 1
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fi
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echo "cd ${root_prefix} && cpio -d -i >/dev/console" >&10
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find $needed | cpio -H newc -o >&10
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# make sure the connection hasn't died
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echo "echo finished" >&10
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read n <&${remote[0]}
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echo $n
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