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#! /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 "$url"; then
echo "syntax: nix-prefetch-svn URL [REVISION [EXPECTED-HASH]]" >&2
exit 1
fi
test -n "$rev" || rev="HEAD"
repoName=$(echo $url | sed '
s,.*/\([^/]\+\)/trunk/*$,\1,;t
s,.*/\([^/]\+\)/branches/\([^/]\+\)/*$,\1-\2,;t
s,.*/\([^/]\+\)/tags/\([^/]\+\)/*$,\1-\2,;t
s,.*/\([^/]\+\)/*$,\1,;t
')
dstFile=$repoName-r$rev
# If the hash was given, a file with that hash may already be in the
# store.
if test -n "$expHash"; then
finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" $dstFile)
if ! nix-store --check-validity "$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/svn-checkout-tmp-$$
tmpFile=$tmpPath/$dstFile
mkdir $tmpPath
trap "rm -rf $tmpPath" EXIT
# Perform the checkout.
if test "$NIX_PREFETCH_SVN_LEAVE_DOT_SVN" != 1
then
command="export"
else
command="checkout"
fi
echo p | svn "$command" --quiet -r "$rev" "$url" "$tmpFile" >&2
# Compute the hash.
hash=$(nix-hash --type $hashType $hashFormat $tmpFile)
if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
# Add the downloaded file to the Nix store.
finalPath=$(nix-store --add-fixed --recursive "$hashType" $tmpFile)
if test -n "$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
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