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# This function downloads and unpacks an archive file, such as a zip
# or tar file. This is primarily useful for dynamically generated
# archives, such as GitHub's /archive URLs, where the unpacked content
# of the zip file doesn't change, but the zip file itself may
# (e.g. due to minor changes in the compression algorithm, or changes
# in timestamps).
{ lib, fetchurl, unzip }:
{ # Optionally move the contents of the unpacked tree up one level.
stripRoot ? true
, url
, ... } @ args:
lib.overrideDerivation (fetchurl ({
name = args.name or (baseNameOf url);
recursiveHash = true;
downloadToTemp = true;
postFetch =
''
export PATH=${unzip}/bin:$PATH
mkdir $out
unpackDir="$TMPDIR/unpack"
mkdir "$unpackDir"
cd "$unpackDir"
renamed="$TMPDIR/${baseNameOf url}"
mv "$downloadedFile" "$renamed"
unpackFile "$renamed"
shopt -s dotglob
''
+ (if stripRoot then ''
if [ $(ls "$unpackDir" | wc -l) != 1 ]; then
echo "error: zip file must contain a single file or directory."
exit 1
fi
fn=$(cd "$unpackDir" && echo *)
if [ -f "$unpackDir/$fn" ]; then
mv "$unpackDir/$fn" "$out"
else
mv "$unpackDir/$fn"/* "$out/"
fi
'' else ''
mv "$unpackDir"/* "$out/"
'');
} // removeAttrs args [ "stripRoot" ]))
# Hackety-hack: we actually need unzip hooks, too
(x: {nativeBuildInputs = x.nativeBuildInputs++ [unzip];})
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