61 lines
2.3 KiB
Nix
61 lines
2.3 KiB
Nix
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{ lib, runCommand, transmission_noSystemd, rqbit, writeShellScript, formats, cacert, rsync }:
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let
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urlRegexp = ''.*xt=urn:bt[im]h:([^&]{64}|[^&]{40}).*'';
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in
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{ url
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, name ?
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if (builtins.match urlRegexp url) == null then
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"bittorrent"
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else
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"bittorrent-" + builtins.head (builtins.match urlRegexp url)
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, config ? if (backend == "transmission") then { } else throw "json config for configuring fetchFromBitorrent only works with the transmission backend"
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, hash
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, backend ? "transmission"
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, recursiveHash ? true
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, postFetch ? ""
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, postUnpack ? ""
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}:
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let
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afterSuccess = writeShellScript "fetch-bittorrent-done.sh" ''
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${postUnpack}
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# Flatten the directory, so that only the torrent contents are in $out, not
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# the folder name
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shopt -s dotglob
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mv -v $downloadedDirectory/*/* $out
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rm -v -rf $downloadedDirectory
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unset downloadedDirectory
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${postFetch}
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kill $PPID
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'';
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jsonConfig = (formats.json {}).generate "jsonConfig" config;
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in
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runCommand name {
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nativeBuildInputs = [ cacert ] ++ (if (backend == "transmission" ) then [ transmission_noSystemd ] else if (backend == "rqbit") then [ rqbit ] else throw "rqbit or transmission are the only available backends for fetchbittorrent");
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outputHashAlgo = if hash != "" then null else "sha256";
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outputHash = hash;
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outputHashMode = if recursiveHash then "recursive" else "flat";
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# url will be written to the derivation, meaning it can be parsed and utilized
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# by external tools, such as tools that may want to seed fetchBittorrent calls
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# in nixpkgs
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inherit url;
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}
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(if (backend == "transmission") then ''
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export HOME=$TMP
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export downloadedDirectory=$out/downloadedDirectory
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mkdir -p $downloadedDirectory
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mkdir -p $HOME/.config/transmission
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cp ${jsonConfig} $HOME/.config/transmission/settings.json
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function handleChild {
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# This detects failures and logs the contents of the transmission fetch
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find $out
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exit 0
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}
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trap handleChild CHLD
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transmission-cli --port $(shuf -n 1 -i 49152-65535) --portmap --finish ${afterSuccess} --download-dir $downloadedDirectory --config-dir "$HOME"/.config/transmission "$url"
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'' else
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''
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export HOME=$TMP
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rqbit --disable-dht-persistence --http-api-listen-addr "127.0.0.1:$(shuf -n 1 -i 49152-65535)" download -o $out --exit-on-finish "$url"
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'')
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