lix/tests/fetchurl.sh
Eelco Dolstra 6024dc1d97
Support SRI hashes
SRI hashes (https://www.w3.org/TR/SRI/) combine the hash algorithm and
a base-64 hash. This allows more concise and standard hash
specifications. For example, instead of

  import <nix/fetchurl.nl> {
    url = https://nixos.org/releases/nix/nix-2.1.3/nix-2.1.3.tar.xz;
    sha256 = "5d22dad058d5c800d65a115f919da22938c50dd6ba98c5e3a183172d149840a4";
  };

you can write

  import <nix/fetchurl.nl> {
    url = https://nixos.org/releases/nix/nix-2.1.3/nix-2.1.3.tar.xz;
    hash = "sha256-XSLa0FjVyADWWhFfkZ2iKTjFDda6mMXjoYMXLRSYQKQ=";
  };

In fixed-output derivations, the outputHashAlgo is no longer mandatory
if outputHash specifies the hash (either as an SRI or in the old
"<type>:<hash>" format).

'nix hash-{file,path}' now print hashes in SRI format by default. I
also reverted them to use SHA-256 by default because that's what we're
using most of the time in Nixpkgs.

Suggested by @zimbatm.
2018-12-13 14:30:52 +01:00

75 lines
2.1 KiB
Bash

source common.sh
clearStore
# Test fetching a flat file.
hash=$(nix-hash --flat --type sha256 ./fetchurl.sh)
outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr sha256 $hash --no-out-link --hashed-mirrors '')
cmp $outPath fetchurl.sh
# Now using a base-64 hash.
clearStore
hash=$(nix hash-file --type sha512 --base64 ./fetchurl.sh)
outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr sha512 $hash --no-out-link --hashed-mirrors '')
cmp $outPath fetchurl.sh
# Now using an SRI hash.
clearStore
hash=$(nix hash-file ./fetchurl.sh)
[[ $hash =~ ^sha512- ]]
outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr hash $hash --no-out-link --hashed-mirrors '')
cmp $outPath fetchurl.sh
# Test the hashed mirror feature.
clearStore
hash=$(nix hash-file --type sha512 --base64 ./fetchurl.sh)
hash32=$(nix hash-file --type sha512 --base16 ./fetchurl.sh)
mirror=$TMPDIR/hashed-mirror
rm -rf $mirror
mkdir -p $mirror/sha512
ln -s $(pwd)/fetchurl.sh $mirror/sha512/$hash32
outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file:///no-such-dir/fetchurl.sh --argstr sha512 $hash --no-out-link --hashed-mirrors "file://$mirror")
# Test unpacking a NAR.
rm -rf $TEST_ROOT/archive
mkdir -p $TEST_ROOT/archive
cp ./fetchurl.sh $TEST_ROOT/archive
chmod +x $TEST_ROOT/archive/fetchurl.sh
ln -s foo $TEST_ROOT/archive/symlink
nar=$TEST_ROOT/archive.nar
nix-store --dump $TEST_ROOT/archive > $nar
hash=$(nix-hash --flat --type sha256 $nar)
outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$nar --argstr sha256 $hash \
--arg unpack true --argstr name xyzzy --no-out-link)
echo $outPath | grep -q 'xyzzy'
test -x $outPath/fetchurl.sh
test -L $outPath/symlink
nix-store --delete $outPath
# Test unpacking a compressed NAR.
narxz=$TEST_ROOT/archive.nar.xz
rm -f $narxz
xz --keep $nar
outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$narxz --argstr sha256 $hash \
--arg unpack true --argstr name xyzzy --no-out-link)
test -x $outPath/fetchurl.sh
test -L $outPath/symlink