68 lines
1.7 KiB
Bash
Executable file
68 lines
1.7 KiB
Bash
Executable file
#! /bin/sh -e
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url=$1
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rev=$2
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expHash=$3
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hashType=$NIX_HASH_ALGO
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if test -z "$hashType"; then
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hashType=md5
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fi
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if test -z "$url"; then
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echo "syntax: nix-prefetch-svn URL [REVISION [EXPECTED-HASH]]" >&2
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exit 1
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fi
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test -n "$rev" || rev="HEAD"
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# Use a restrictive umask to ensure that the output in the Nix store
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# is not group- or world-writable. Nix 0.10 complains about this.
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umask 0022
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# If the hash was given, a file with that hash may already be in the
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# store.
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if test -n "$expHash"; then
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finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" svn-export)
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if ! nix-store --check-validity "$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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# !!! race? should be relatively safe, `svn export' barfs if $tmpPath exists.
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tmpPath=/tmp/svn-checkout-tmp-$$
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tmpFile=$tmpPath/svn-export
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mkdir $tmpPath
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# Perform the checkout.
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echo p | svn export -r "$rev" "$url" $tmpFile >&2
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# Compute the hash.
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hash=$(nix-hash --type $hashType $hashFormat $tmpFile)
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if ! test -n "$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" $tmpFile)
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if test -n "$tmpPath"; then rm -rf $tmpPath || true; fi
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if test -n "$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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