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#! /bin/sh -e
usage(){
echo >&2 "syntax: nix-prefetch-zip [OPTIONS] [URL [EXPECTED-HASH]]
Options:
--url url The url of the archive to fetch.
--name name The name to use for the store path (defaults to \`basename \$url\`).
--ext ext The file extension (.zip, .tar.gz, ...) to be REMOVED from name
--hash hash The hash of unpacked archive.
--hash-type type Use the specified cryptographic hash algorithm, which can be one of md5, sha1, and sha256.
--leave-root Keep the root directory of the archive.
--help Show this help text.
"
exit 1
}
name=""
ext=""
argi=0
argfun=""
for arg; do
if test -z "$argfun"; then
case $arg in
--url) argfun=set_url;;
--name) argfun=set_name;;
--ext) argfun=set_ext;;
--hash) argfun=set_expHash;;
--hash-type) argfun=set_hashType;;
--leave-root) leaveRoot=true;;
--help) usage;;
*) argi=$(($argi + 1))
case $argi in
1) url=$arg;;
2) rev=$arg;;
3) expHash=$arg;;
*) echo "Unexpected argument: $arg" >&2
usage
;;
esac
;;
esac
else
case $argfun in
set_*)
var=$(echo $argfun | sed 's,^set_,,')
eval "$var=\$arg"
;;
esac
argfun=""
fi
done
if [ -z "$url" ]; then
echo "Error: No --url flag given" >&2
usage
fi
if [ -z "$name" ]; then
name=$(basename "$url")
fi
if test -z "$hashType"; then
hashType=sha256
fi
hashFormat="--base32"
tmp=$(mktemp -d 2>/dev/null || mktemp -d -t "$$")
trap "rm -rf '$tmp'" EXIT
dirname=$(basename -s "$ext" "$name")
unpackDirTmp=$tmp/unpacked-tmp/$dirname
mkdir -p $unpackDirTmp
unpackDir=$tmp/unpacked/$dirname
mkdir -p $unpackDir
downloadedFile=$tmp/$(basename "$url")
unpackFile() {
local curSrc="$1"
case "$curSrc" in
*.tar.xz | *.tar.lzma)
# Don't rely on tar knowing about .xz.
xz -d < $curSrc | tar xf -
;;
*.tar | *.tar.* | *.tgz | *.tbz2)
# GNU tar can automatically select the decompression method
# (info "(tar) gzip").
tar xf $curSrc
;;
*.zip)
unzip -qq $curSrc
;;
*)
echo "source archive $curSrc has unknown type" >&2
exit 1
;;
esac
}
# If the hash was given, a file with that hash may already be in the
# store.
if test -n "$expHash"; then
finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" "$name")
if ! nix-store --check-validity "$finalPath" 2> /dev/null; then
finalPath=
fi
hash=$expHash
fi
# If we don't know the hash or a path with that hash doesn't exist,
# download the file and add it to the store.
if test -z "$finalPath"; then
curl="curl \
--location --max-redirs 20 \
--disable-epsv \
--insecure"
if ! $curl --fail "$url" --output "$downloadedFile"; then
echo "error: could not download $url" >&2
exit 1
fi
if [ -z "$leaveRoot" ]; then
shopt -s dotglob
cd "$unpackDirTmp"
unpackFile "$downloadedFile"
if [ $(ls "$unpackDirTmp" | wc -l) != 1 ]; then
echo "error: zip file must contain a single file or directory."
exit 1
fi
fn=$(cd "$unpackDirTmp" && echo *)
if [ -f "$unpackDirTmp/$fn" ]; then
mv "$unpackDirTmp/$fn" "$unpackDir"
else
mv "$unpackDirTmp/$fn/"* "$unpackDir/"
fi
else
cd $unpackDir
unpackFile "$downloadedFile"
fi
# Compute the hash.
hash=$(nix-hash --type $hashType $hashFormat $unpackDir)
if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
# Add the downloaded file to the Nix store.
finalPath=$(nix-store --add-fixed --recursive "$hashType" $unpackDir)
if test -n "$expHash" -a "$expHash" != "$hash"; then
echo "hash mismatch for URL \`$url'"
exit 1
fi
fi
if ! test -n "$QUIET"; then echo "path is $finalPath" >&2; fi
echo $hash
if test -n "$PRINT_PATH"; then
echo $finalPath
fi