* Make nix-prefetch-svn use nix-store --add-fixed (just like

nix-prefetch-url) 

svn path=/nixpkgs/trunk/; revision=5339
This commit is contained in:
Eelco Dolstra 2006-05-30 12:42:00 +00:00
parent 9ece10787e
commit c4c224e368

View file

@ -2,10 +2,15 @@
url=$1
rev=$2
hash=$3
expHash=$3
hashType=$NIX_HASH_ALGO
if test -z "$hashType"; then
hashType=md5
fi
if test -z "$url"; then
echo "syntax: nix-prefetch-svn URL [REVISION]" >&2
echo "syntax: nix-prefetch-svn URL [REVISION [EXPECTED-HASH]]" >&2
exit 1
fi
@ -15,58 +20,46 @@ test -n "$rev" || rev="HEAD"
# is not group- or world-writable. Nix 0.10 complains about this.
umask 0022
# Determine the hash, unless it was given.
if test -z "$hash"; then
# !!! hacky; we should have a way to query the location of the store.
if storeDir=$(which nix-store); then
storeDir=$(dirname $(dirname "$storeDir"))/store
else
storeDir=/nix/store
# 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" svn-export)
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
# !!! race? should be relatively safe, `svn export' barfs if $tmpPath exists.
tmpPath1=$storeDir/svn-checkout-tmp-$$
# Test whether we have write permission in the store. If not,
# fetch to /tmp and don't copy to the store. This is a hack to
# make this script at least work somewhat in setuid installations.
if ! touch $tmpPath1 2> /dev/null; then
echo "(cannot write to the store, result won't be cached)" >&2
dummyMode=1
tmpPath1=/tmp/nix-prefetch-svn-$$ # !!! security?
fi
rm -f $tmpPath1
tmpPath=/tmp/svn-checkout-tmp-$$
tmpFile=$tmpPath/svn-export
mkdir $tmpPath
# Perform the checkout.
svn export -r "$rev" "$url" $tmpPath1 >&2
svn export -r "$rev" "$url" $tmpFile >&2
# Compute the hash.
hash=$(nix-hash $tmpPath1)
echo "hash is $hash" >&2
hash=$(nix-hash --type $hashType $hashFormat $tmpFile)
if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
# Rename it so that the fetchsvn builder can find it.
if test "$dummyMode" != 1; then
tmpPath2=$storeDir/svn-checkout-tmp-$hash
test -e $tmpPath2 || mv $tmpPath1 $tmpPath2 # !!! race
# Add the downloaded file to the Nix store.
finalPath=$(nix-store --add-fixed --recursive "$hashType" $tmpFile)
if test -n "$tmpPath"; then rm -rf $tmpPath || true; fi
if test -n "$expHash" -a "$expHash" != "$hash"; then
echo "hash mismatch for URL \`$url'"
exit 1
fi
fi
# Create a Nix expression that does a fetchsvn.
scriptDir=$(dirname $(readlink -f $0 2> /dev/null || echo $0))
nixExpr=$scriptDir/../../top-level/all-packages.nix
storeExpr=$( \
echo "(import $nixExpr {}).fetchsvn {url=\"$url\"; rev=\"$rev\"; md5=\"$hash\";}" \
| nix-instantiate -)
# Realise it.
finalPath=$(nix-store -r $storeExpr)
echo "path is $finalPath" >&2
if test -n "$tmpPath1" -o -n "$tmpPath2"; then
rm -rf $tmpPath1 $tmpPath2 || true
fi
if ! test -n "$QUIET"; then echo "path is $finalPath" >&2; fi
echo $hash