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45 lines
1.3 KiB
Nix
45 lines
1.3 KiB
Nix
# This function downloads and unpacks an archive file, such as a zip
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# or tar file. This is primarily useful for dynamically generated
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# archives, such as GitHub's /archive URLs, where the unpacked content
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# of the zip file doesn't change, but the zip file itself may
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# (e.g. due to minor changes in the compression algorithm, or changes
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# 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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, url
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, ... } @ args:
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fetchurl ({
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# Remove the extension, because otherwise unpackPhase will get
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# confused. FIXME: fix unpackPhase.
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name = args.name or lib.removeSuffix ".zip" (lib.removeSuffix ".tar.gz" (baseNameOf url));
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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/${baseNameOf url}"
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mv "$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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} // args)
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