45 lines
1.3 KiB
Nix
45 lines
1.3 KiB
Nix
# 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:
|
|
|
|
fetchurl ({
|
|
# Remove the extension, because otherwise unpackPhase will get
|
|
# confused. FIXME: fix unpackPhase.
|
|
name = args.name or lib.removeSuffix ".zip" (lib.removeSuffix ".tar.gz" (baseNameOf url));
|
|
|
|
recursiveHash = true;
|
|
|
|
downloadToTemp = true;
|
|
|
|
postFetch =
|
|
''
|
|
export PATH=${unzip}/bin:$PATH
|
|
mkdir $out
|
|
cd $out
|
|
renamed="$TMPDIR/${baseNameOf url}"
|
|
mv "$downloadedFile" "$renamed"
|
|
unpackFile "$renamed"
|
|
''
|
|
# FIXME: handle zip files that contain a single regular file.
|
|
+ lib.optionalString stripRoot ''
|
|
shopt -s dotglob
|
|
if [ "$(ls -d $out/* | wc -l)" != 1 ]; then
|
|
echo "error: zip file must contain a single directory."
|
|
exit 1
|
|
fi
|
|
fn=$(cd "$out" && echo *)
|
|
mv $out/$fn/* "$out/"
|
|
rmdir "$out/$fn"
|
|
'';
|
|
} // args)
|