nixpkgs/pkgs/build-support/fetchsvn/builder.sh
Eelco Dolstra 5c847a370a * fetchsvn' now requires the MD5 hash (as computed by nix-hash') of
the tree being fetched from a Subversion repository.  The revision
  number is now optional (and defaults to HEAD).

  This makes `fetchsvn' more pure.  First, a URL/revision tuple does
  not uniquely identify a file resource, since the repository itself
  might change.  Second, `svn:external' attributes can cause arbitrary
  resources to be exported.

  A script `nix-prefetch-svn' has been provided to determine the hash
  of a URL.

svn path=/nixpkgs/trunk/; revision=938
2004-04-14 10:55:33 +00:00

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. $stdenv/setup
header "exporting $url (r$rev) into $out"
prefetch=$(dirname $out)/svn-checkout-tmp-$md5
echo $prefetch
if test -e "$prefetch"; then
mv $prefetch $out
else
svn export -r "$rev" "$url" $out
fi
actual=$(nix-hash $out)
if test "$actual" != "$md5"; then
echo "hash is $actual, expected $md5" >&2
exit 1
fi
stopNest