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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, glibcLocalesUtf8 }:
{ name ? "source"
, url ? ""
, urls ? []
, nativeBuildInputs ? []
, postFetch ? ""
, extraPostFetch ? ""
# Optionally move the contents of the unpacked tree up one level.
, stripRoot ? true
# Allows to set the extension for the intermediate downloaded
# file. This can be used as a hint for the unpackCmdHooks to select
# an appropriate unpacking tool.
, extension ? null
# the rest are given to fetchurl as is
, ... } @ args:
assert (extraPostFetch != "") -> lib.warn "use 'postFetch' instead of 'extraPostFetch' with 'fetchzip' and 'fetchFromGitHub'." true;
let
tmpFilename =
if extension != null
then "download.${extension}"
else baseNameOf (if url != "" then url else builtins.head urls);
in
fetchurl ({
inherit name;
recursiveHash = true;
downloadToTemp = true;
# Have to pull in glibcLocalesUtf8 for unzip in setup-hook.sh to handle
# UTF-8 aware locale:
# https://github.com/NixOS/nixpkgs/issues/176225#issuecomment-1146617263
nativeBuildInputs = [ unzip glibcLocalesUtf8 ] ++ nativeBuildInputs;
postFetch =
''
unpackDir="$TMPDIR/unpack"
mkdir "$unpackDir"
cd "$unpackDir"
renamed="$TMPDIR/${tmpFilename}"
mv "$downloadedFile" "$renamed"
unpackFile "$renamed"
chmod -R +w "$unpackDir"
'' + (if stripRoot then ''
if [ $(ls -A "$unpackDir" | wc -l) != 1 ]; then
echo "error: zip file must contain a single file or directory."
echo "hint: Pass stripRoot=false; to fetchzip to assume flat list of files."
exit 1
fi
fn=$(cd "$unpackDir" && ls -A)
if [ -f "$unpackDir/$fn" ]; then
mkdir $out
fi
mv "$unpackDir/$fn" "$out"
'' else ''
mv "$unpackDir" "$out"
'') + ''
${postFetch}
${extraPostFetch}
chmod 755 "$out"
'';
# ^ Remove non-owner write permissions
# Fixes https://github.com/NixOS/nixpkgs/issues/38649
} // removeAttrs args [ "stripRoot" "extraPostFetch" "postFetch" "extension" "nativeBuildInputs" ])
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