148 lines
3.5 KiB
Plaintext
148 lines
3.5 KiB
Plaintext
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#! /bin/sh -e
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usage(){
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echo >&2 "syntax: nix-prefetch-zip [options]
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Options:
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--url name The url of the archive to fetch.
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--name name The name to use for the store path (defaults to \`basename \$url\`).
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--hash name The hash of unpacked archive.
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--hash-type hash Use the specified cryptographic hash algorithm, which can be one of md5, sha1, and sha256.
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--base32 Print/accept the hash in a base-32 representation rather than hexadecimal.
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--leave-root Keep the root directory of the archive.
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--help Show this help text.
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"
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exit 1
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}
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argi=0
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argfun=""
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for arg; do
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if test -z "$argfun"; then
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case $arg in
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--url) argfun=set_url;;
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--name) argfun=set_name;;
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--hash) argfun=set_expHash;;
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--hash-type) argfun=set_hashType;;
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--base32) hashFormat="--base32";;
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--leave-root) leaveRoot=true;;
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--help) usage;;
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*)
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echo "Unexpected argument: $arg" >&2
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usage
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;;
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esac
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else
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case $argfun in
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set_*)
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var=$(echo $argfun | sed 's,^set_,,')
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eval "$var=\$arg"
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;;
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esac
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argfun=""
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fi
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done
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if [ -z "$url" ]; then
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echo "Error: No --url flag given" >&2
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usage
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fi
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if [ -z "$name" ]; then
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name=$(basename "$url")
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fi
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if test -z "$hashType"; then
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hashType=sha256
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fi
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tmp=$(mktemp -d 2>/dev/null || mktemp -d -t "$$")
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trap "rm -rf \"\$tmp\"" EXIT
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TMPDIR=$tmp/unpacked/$name
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mkdir -p $TMPDIR
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downloadedFile=$tmp/$name
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unpackFile() {
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local curSrc="$1"
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case "$curSrc" in
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*.tar.xz | *.tar.lzma)
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# Don't rely on tar knowing about .xz.
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xz -d < $curSrc | tar xf -
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;;
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*.tar | *.tar.* | *.tgz | *.tbz2)
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# GNU tar can automatically select the decompression method
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# (info "(tar) gzip").
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tar xf $curSrc
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;;
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*.zip)
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unzip -qq $curSrc
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;;
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*)
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echo "source archive $curSrc has unknown type" >&2
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exit 1
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;;
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esac
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}
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# If the hash was given, a file with that hash may already be in the
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# store.
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if test -n "$expHash"; then
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finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" "$name")
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if ! nix-store --check-validity "$finalPath" 2> /dev/null; then
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finalPath=
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fi
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hash=$expHash
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fi
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# If we don't know the hash or a path with that hash doesn't exist,
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# download the file and add it to the store.
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if test -z "$finalPath"; then
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curl="curl \
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--location --max-redirs 20 \
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--disable-epsv \
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--insecure"
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if ! $curl --fail "$url" --output "$downloadedFile"; then
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echo "error: could not download $url" >&2
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exit 1
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fi
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cd $TMPDIR
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unpackFile "$downloadedFile"
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# FIXME: handle zip files that contain a single regular file.
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if [ -z "$leaveRoot" ]; then
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shopt -s dotglob
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if [ $(ls -d $TMPDIR/* | wc -l) != 1 ]; then
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echo "error: zip file must contain a single directory."
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exit 1
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fi
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fn=$(cd "$TMPDIR" && echo *)
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mv $TMPDIR/$fn/* "$TMPDIR/"
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rmdir "$TMPDIR/$fn"
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fi
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# Compute the hash.
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hash=$(nix-hash --type $hashType $hashFormat $TMPDIR)
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if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
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# Add the downloaded file to the Nix store.
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finalPath=$(nix-store --add-fixed --recursive "$hashType" $TMPDIR)
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if test -n "$expHash" -a "$expHash" != "$hash"; then
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echo "hash mismatch for URL \`$url'"
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exit 1
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fi
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fi
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if ! test -n "$QUIET"; then echo "path is $finalPath" >&2; fi
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echo $hash
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if test -n "$PRINT_PATH"; then
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echo $finalPath
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fi
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