diff options
Diffstat (limited to 'scripts/nix-prefetch-url.in')
| -rw-r--r-- | scripts/nix-prefetch-url.in | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/scripts/nix-prefetch-url.in b/scripts/nix-prefetch-url.in index 8fc82c11b83a..32f40b5ae6ca 100644 --- a/scripts/nix-prefetch-url.in +++ b/scripts/nix-prefetch-url.in @@ -1,35 +1,41 @@ #! @shell@ -e url=$1 +hash=$2 if test -z "$url"; then echo "syntax: nix-prefetch-url URL" >&2 exit 1 fi -# !!! race -tmpPath1=@storedir@/nix-prefetch-url-$$ +# Determine the hash, unless it was given. +if test -z "$hash"; then -# Test whether we have write permission in the store. If not, fetch -# to /tmp and don't copy to the store. This is a hack to make this -# script at least work somewhat in setuid installations. -if ! touch $tmpPath1 2> /dev/null; then - echo "(cannot write to the store, result won't be cached)" >&2 - dummyMode=1 - tmpPath1=/tmp/nix-prefetch-url-$$ # !!! security? -fi + # !!! race + tmpPath1=@storedir@/nix-prefetch-url-$$ + + # Test whether we have write permission in the store. If not, + # fetch to /tmp and don't copy to the store. This is a hack to + # make this script at least work somewhat in setuid installations. + if ! touch $tmpPath1 2> /dev/null; then + echo "(cannot write to the store, result won't be cached)" >&2 + dummyMode=1 + tmpPath1=/tmp/nix-prefetch-url-$$ # !!! security? + fi + + # Perform the checkout. + @curl@ --fail --location --max-redirs 20 "$url" > $tmpPath1 -# Perform the checkout. -@curl@ --fail --location --max-redirs 20 "$url" > $tmpPath1 + # Compute the hash. + hash=$(@bindir@/nix-hash --flat $tmpPath1) + if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi -# Compute the hash. -hash=$(@bindir@/nix-hash --flat $tmpPath1) -echo "hash is $hash" >&2 + # Rename it so that the fetchurl builder can find it. + if test "$dummyMode" != 1; then + tmpPath2=@storedir@/nix-prefetch-url-$hash + test -e $tmpPath2 || mv $tmpPath1 $tmpPath2 # !!! race + fi -# Rename it so that the fetchurl builder can find it. -if test "$dummyMode" != 1; then - tmpPath2=@storedir@/nix-prefetch-url-$hash - test -e $tmpPath2 || mv $tmpPath1 $tmpPath2 # !!! race fi # Create a Nix expression that does a fetchurl. @@ -41,7 +47,7 @@ storeExpr=$( \ # Realise it. finalPath=$(@bindir@/nix-store -qnB --force-realise $storeExpr) -echo "path is $finalPath" >&2 +if ! test -n "$QUIET"; then echo "path is $finalPath" >&2; fi rm -rf $tmpPath1 $tmpPath2 || true |