76 lines
1.6 KiB
Bash
Executable File
76 lines
1.6 KiB
Bash
Executable File
#! /bin/sh -e
|
|
|
|
url=$1
|
|
rev=$2
|
|
expHash=$3
|
|
|
|
hashType=$NIX_HASH_ALGO
|
|
if test -z "$hashType"; then
|
|
hashType=sha256
|
|
fi
|
|
if test -z "$hashFormat"; then
|
|
hashFormat=--base32
|
|
fi
|
|
|
|
if test -z "$url"; then
|
|
echo "syntax: nix-prefetch-hg URL [rev [EXPECTED-HASH]]" >&2
|
|
exit 1
|
|
fi
|
|
|
|
test -n "$rev" || rev="tip"
|
|
|
|
|
|
# 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" hg-archive)
|
|
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
|
|
|
|
tmpPath=/tmp/hg-checkout-tmp-$$
|
|
tmpArchive=$tmpPath/hg-archive
|
|
mkdir $tmpPath
|
|
|
|
trap "rm -rf $tmpPath" EXIT
|
|
|
|
# Perform the checkout.
|
|
if [[ $url != /* ]]; then
|
|
tmpClone=$tmpPath/hg-clone
|
|
hg clone -q -y -U "$url" $tmpClone >&2
|
|
else
|
|
tmpClone=$url
|
|
fi
|
|
hg archive -q -y -r "$rev" --cwd $tmpClone $tmpArchive
|
|
|
|
|
|
# Compute the hash.
|
|
hash=$(nix-hash --type $hashType $hashFormat $tmpArchive)
|
|
if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
|
|
|
|
# Add the downloaded file to the Nix store.
|
|
finalPath=$(nix-store --add-fixed --recursive "$hashType" $tmpArchive)
|
|
|
|
if test -n "$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
|