43 lines
1.2 KiB
Nix
43 lines
1.2 KiB
Nix
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# This function downloads and unpacks a zip file. This is primarily
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# useful for dynamically generated zip files, such as GitHub's
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# /archive URLs, where the unpacked content of the zip file doesn't
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# change, but the zip file itself may (e.g. due to minor changes in
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# the compression algorithm, or changes in timestamps).
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{ lib, fetchurl, unzip }:
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{ # Optionally move the contents of the unpacked tree up one level.
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stripRoot ? true
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, ... } @ args:
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fetchurl (args // {
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# Apply a suffix to the name. Otherwise, unpackPhase will get
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# confused by the .zip extension.
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nameSuffix = "-unpacked";
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recursiveHash = true;
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downloadToTemp = true;
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postFetch =
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''
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export PATH=${unzip}/bin:$PATH
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mkdir $out
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cd $out
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renamed="$TMPDIR/''${name%-unpacked}"
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mv "$downloadedFile" "$renamed"
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unpackFile "$renamed"
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''
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# FIXME: handle zip files that contain a single regular file.
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+ lib.optionalString stripRoot ''
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shopt -s dotglob
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if [ "$(ls -d $out/* | wc -l)" != 1 ]; then
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echo "error: zip file must contain a single directory."
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exit 1
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fi
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fn=$(cd "$out" && echo *)
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mv $out/$fn/* "$out/"
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rmdir "$out/$fn"
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'';
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})
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