82 lines
1.9 KiB
Bash
Executable file
82 lines
1.9 KiB
Bash
Executable file
#! /bin/sh -e
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cvsRoot=$1
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module=$2
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tag=$3
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expHash=$4
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hashType=$NIX_HASH_ALGO
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if test -z "$hashType"; then
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hashType=sha256
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fi
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if test -z "$cvsRoot"; then
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echo "syntax: nix-prefetch-cvs CVSROOT MODULE [TAG [HASH]]" >&2
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exit 1
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elif test -z "$module"; then
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echo "syntax: nix-prefetch-cvs CVSROOT MODULE [TAG [HASH]]" >&2
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exit 1
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fi
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mkTempDir() {
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tmpPath=$(mktemp -d -t nix-prefetch-cvs-XXXXXXXX)
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trap removeTempDir EXIT SIGINT SIGQUIT
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}
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removeTempDir() {
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if test -n "$tmpPath"; then
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rm -rf "$tmpPath" || true
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fi
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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" cvs-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 "$finalPath"; then
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mkTempDir
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tmpFile=$tmpPath/cvs-export
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#mkdir $tmpPath
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# Perform the checkout.
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if test -z "$tag"; then
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args=(-D "now")
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elif test "$USE_DATE" = "1"; then
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args=(-D "$tag")
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else
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args=(-r "$tag")
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fi
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(cd "$tmpPath" && cvs -f -z0 -d $cvsRoot export "${args[*]}" -d cvs-export $module >&2)
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# Compute the hash.
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hash=$(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" $tmpFile)
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if test -n "$expHash" -a "$expHash" != "$hash"; then
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echo "hash mismatch for CVS root \`$cvsRoot'"
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exit 1
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fi
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fi
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if ! test -n "$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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