Merge branch 'master' into structured-attrs-shell

Conflicts:
        src/nix/develop.cc
        src/nix/get-env.sh
        tests/shell.nix

tests/add.sh

@@ -9,7 +9,7 @@ echo $path2
 if test "$path1" != "$path2"; then
     echo "nix-store --add and --add-fixed mismatch"
     exit 1
-fi    
+fi
 
 path3=$(nix-store --add-fixed sha256 ./dummy)
 echo $path3

tests/build-remote-content-addressed-floating.sh

@@ -4,4 +4,6 @@ file=build-hook-ca-floating.nix
 
 sed -i 's/experimental-features .*/& ca-derivations/' "$NIX_CONF_DIR"/nix.conf
 
+CONTENT_ADDRESSED=true
+
 source build-remote.sh

tests/build-remote.sh

@@ -6,12 +6,17 @@ unset NIX_STATE_DIR
 
 function join_by { local d=$1; shift; echo -n "$1"; shift; printf "%s" "${@/#/$d}"; }
 
+EXTRA_SYSTEM_FEATURES=()
+if [[ -n "$CONTENT_ADDRESSED" ]]; then
+    EXTRA_SYSTEM_FEATURES=("ca-derivations")
+fi
+
 builders=(
   # system-features will automatically be added to the outer URL, but not inner
   # remote-store URL.
-  "ssh://localhost?remote-store=$TEST_ROOT/machine1?system-features=foo - - 1 1 foo"
-  "$TEST_ROOT/machine2 - - 1 1 bar"
-  "ssh-ng://localhost?remote-store=$TEST_ROOT/machine3?system-features=baz - - 1 1 baz"
+  "ssh://localhost?remote-store=$TEST_ROOT/machine1?system-features=$(join_by "%20" foo ${EXTRA_SYSTEM_FEATURES[@]}) - - 1 1 $(join_by "," foo ${EXTRA_SYSTEM_FEATURES[@]})"
+  "$TEST_ROOT/machine2 - - 1 1 $(join_by "," bar ${EXTRA_SYSTEM_FEATURES[@]})"
+  "ssh-ng://localhost?remote-store=$TEST_ROOT/machine3?system-features=$(join_by "%20" baz ${EXTRA_SYSTEM_FEATURES[@]}) - - 1 1 $(join_by "," baz ${EXTRA_SYSTEM_FEATURES[@]})"
 )
 
 chmod -R +w $TEST_ROOT/machine* || true

tests/build.sh

@@ -1,7 +1,7 @@
 source common.sh
 
 expectedJSONRegex='\[\{"drvPath":".*multiple-outputs-a.drv","outputs":\{"first":".*multiple-outputs-a-first","second":".*multiple-outputs-a-second"}},\{"drvPath":".*multiple-outputs-b.drv","outputs":\{"out":".*multiple-outputs-b"}}]'
-nix build -f multiple-outputs.nix --json a.all b.all | jq --exit-status '
+nix build -f multiple-outputs.nix --json a.all b.all --no-link | jq --exit-status '
   (.[0] |
     (.drvPath | match(".*multiple-outputs-a.drv")) and
     (.outputs.first | match(".*multiple-outputs-a-first")) and
@@ -10,10 +10,10 @@ nix build -f multiple-outputs.nix --json a.all b.all | jq --exit-status '
     (.drvPath | match(".*multiple-outputs-b.drv")) and
     (.outputs.out | match(".*multiple-outputs-b")))
 '
-
 testNormalization () {
     clearStore
-    outPath=$(nix-build ./simple.nix)
+    outPath=$(nix-build ./simple.nix --no-out-link)
     test "$(stat -c %Y $outPath)" -eq 1
 }
+
 testNormalization

tests/ca/duplicate-realisation-in-closure.sh

@@ -0,0 +1,26 @@
+source ./common.sh
+
+sed -i 's/experimental-features .*/& ca-derivations ca-references/' "$NIX_CONF_DIR"/nix.conf
+
+export REMOTE_STORE_DIR="$TEST_ROOT/remote_store"
+export REMOTE_STORE="file://$REMOTE_STORE_DIR"
+
+rm -rf $REMOTE_STORE_DIR
+clearStore
+
+# Build dep1 and push that to the binary cache.
+# This entails building (and pushing) current-time.
+nix copy --to "$REMOTE_STORE" -f nondeterministic.nix dep1
+clearStore
+sleep 2 # To make sure that `$(date)` will be different
+# Build dep2.
+# As we’ve cleared the cache, we’ll have to rebuild current-time. And because
+# the current time isn’t the same as before, this will yield a new (different)
+# realisation
+nix build -f nondeterministic.nix dep2 --no-link
+
+# Build something that depends both on dep1 and dep2.
+# If everything goes right, we should rebuild dep2 rather than fetch it from
+# the cache (because that would mean duplicating `current-time` in the closure),
+# and have `dep1 == dep2`.
+nix build --substituters "$REMOTE_STORE" -f nondeterministic.nix toplevel --no-require-sigs --no-link

tests/ca/gc.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+# Ensure that garbage collection works properly with ca derivations
+
+source common.sh
+
+sed -i 's/experimental-features .*/& ca-derivations ca-references/' "$NIX_CONF_DIR"/nix.conf
+
+export NIX_TESTS_CA_BY_DEFAULT=1
+
+cd ..
+source gc.sh

tests/ca/nix-shell.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+source common.sh
+
+sed -i 's/experimental-features .*/& ca-derivations ca-references nix-command flakes/' "$NIX_CONF_DIR"/nix.conf
+
+CONTENT_ADDRESSED=true
+cd ..
+source ./nix-shell.sh
+

tests/ca/nondeterministic.nix

@@ -0,0 +1,35 @@
+with import ./config.nix;
+
+let mkCADerivation = args: mkDerivation ({
+    __contentAddressed = true;
+    outputHashMode = "recursive";
+    outputHashAlgo = "sha256";
+} // args);
+in
+
+rec {
+  currentTime = mkCADerivation {
+    name = "current-time";
+    buildCommand = ''
+      mkdir $out
+      echo $(date) > $out/current-time
+    '';
+  };
+  dep = seed: mkCADerivation {
+    name = "dep";
+    inherit seed;
+    buildCommand = ''
+      echo ${currentTime} > $out
+    '';
+  };
+  dep1 = dep 1;
+  dep2 = dep 2;
+  toplevel = mkCADerivation {
+    name = "toplevel";
+    buildCommand = ''
+      test ${dep1} == ${dep2}
+      touch $out
+    '';
+  };
+}
+

tests/ca/post-hook.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+source common.sh
+
+sed -i 's/experimental-features .*/& ca-derivations ca-references nix-command flakes/' "$NIX_CONF_DIR"/nix.conf
+
+export NIX_TESTS_CA_BY_DEFAULT=1
+cd ..
+source ./post-hook.sh
+
+

tests/ca/recursive.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+source common.sh
+
+sed -i 's/experimental-features .*/& ca-derivations ca-references nix-command flakes/' "$NIX_CONF_DIR"/nix.conf
+
+export NIX_TESTS_CA_BY_DEFAULT=1
+cd ..
+source ./recursive.sh
+
+

tests/ca/substitute.sh

@@ -17,11 +17,15 @@ buildDrvs () {
 
 # Populate the remote cache
 clearStore
-buildDrvs --post-build-hook ../push-to-store.sh
+nix copy --to $REMOTE_STORE --file ./content-addressed.nix
 
 # Restart the build on an empty store, ensuring that we don't build
 clearStore
-buildDrvs --substitute --substituters $REMOTE_STORE --no-require-sigs -j0
+buildDrvs --substitute --substituters $REMOTE_STORE --no-require-sigs -j0 transitivelyDependentCA
+# Check that the thing we’ve just substituted has its realisation stored
+nix realisation info --file ./content-addressed.nix transitivelyDependentCA
+# Check that its dependencies have it too
+nix realisation info --file ./content-addressed.nix dependentCA rootCA
 
 # Same thing, but
 # 1. With non-ca derivations

tests/check.nix

@@ -44,7 +44,7 @@ with import ./config.nix;
   };
 
   hashmismatch = import <nix/fetchurl.nix> {
-    url = "file://" + toString ./dummy;
+    url = "file://" + builtins.getEnv "TMPDIR" + "/dummy";
     sha256 = "0mdqa9w1p6cmli6976v4wi0sw9r4p5prkj7lzfd1877wk11c9c73";
   };
 

tests/check.sh

@@ -74,12 +74,13 @@ nix-build check.nix -A fetchurl --no-out-link --check
 nix-build check.nix -A fetchurl --no-out-link --repair
 [[ $(cat $path) != foo ]]
 
+echo 'Hello World' > $TMPDIR/dummy
 nix-build check.nix -A hashmismatch --no-out-link || status=$?
 [ "$status" = "102" ]
 
-echo -n > ./dummy
+echo -n > $TMPDIR/dummy
 nix-build check.nix -A hashmismatch --no-out-link
-echo 'Hello World' > ./dummy
+echo 'Hello World' > $TMPDIR/dummy
 
 nix-build check.nix -A hashmismatch --no-out-link --check || status=$?
 [ "$status" = "102" ]

tests/config.nix.in

@@ -1,3 +1,12 @@
+let
+  contentAddressedByDefault = builtins.getEnv "NIX_TESTS_CA_BY_DEFAULT" == "1";
+  caArgs = if contentAddressedByDefault then {
+    __contentAddressed = true;
+    outputHashMode = "recursive";
+    outputHashAlgo = "sha256";
+  } else {};
+in
+
 rec {
   shell = "@bash@";
 
@@ -13,6 +22,6 @@ rec {
       builder = shell;
       args = ["-e" args.builder or (builtins.toFile "builder-${args.name}.sh" "if [ -e .attrs.sh ]; then source .attrs.sh; fi; eval \"$buildCommand\"")];
       PATH = path;
-    } // removeAttrs args ["builder" "meta"])
+    } // caArgs // removeAttrs args ["builder" "meta"])
     // { meta = args.meta or {}; };
 }

tests/dummy

@@ -0,0 +1 @@
+Hello World

tests/fetchGit.sh

@@ -189,3 +189,7 @@ path8=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = \"file://$rep
 rev4=$(git -C $repo rev-parse HEAD)
 rev4_nix=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = \"file://$repo\"; ref = \"HEAD\"; }).rev")
 [[ $rev4 = $rev4_nix ]]
+
+# The name argument should be handled
+path9=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = \"file://$repo\"; ref = \"HEAD\"; name = \"foo\"; }).outPath")
+[[ $path9 =~ -foo$ ]]

tests/fetchMercurial.sh

@@ -94,3 +94,8 @@ hg commit --cwd $repo -m 'Bla3'
 
 path4=$(nix eval --impure --refresh --raw --expr "(builtins.fetchMercurial file://$repo).outPath")
 [[ $path2 = $path4 ]]
+
+echo paris > $repo/hello
+# Passing a `name` argument should be reflected in the output path
+path5=$(nix eval -vvvvv --impure --refresh --raw --expr "(builtins.fetchMercurial { url = \"file://$repo\"; name = \"foo\"; } ).outPath")
+[[ $path5 =~ -foo$ ]]

tests/flakes.sh

@@ -90,76 +90,14 @@ EOF
 git -C $nonFlakeDir add README.md
 git -C $nonFlakeDir commit -m 'Initial'
 
-cat > $registry <<EOF
-{
-  "version": 2,
-  "flakes": [
-    { "from": {
-        "type": "indirect",
-        "id": "flake1"
-      },
-      "to": {
-        "type": "git",
-        "url": "file://$flake1Dir"
-      }
-    },
-    { "from": {
-        "type": "indirect",
-        "id": "flake2"
-      },
-      "to": {
-        "type": "git",
-        "url": "file://$flake2Dir"
-      }
-    },
-    { "from": {
-        "type": "indirect",
-        "id": "flake3"
-      },
-      "to": {
-        "type": "git",
-        "url": "file://$flake3Dir"
-      }
-    },
-    { "from": {
-        "type": "indirect",
-        "id": "flake4"
-      },
-      "to": {
-        "type": "indirect",
-        "id": "flake3"
-      }
-    },
-    { "from": {
-        "type": "indirect",
-        "id": "flake5"
-      },
-      "to": {
-        "type": "hg",
-        "url": "file://$flake5Dir"
-      }
-    },
-    { "from": {
-        "type": "indirect",
-        "id": "nixpkgs"
-      },
-      "to": {
-        "type": "indirect",
-        "id": "flake1"
-      }
-    },
-    { "from": {
-        "type": "indirect",
-        "id": "templates"
-      },
-      "to": {
-        "type": "git",
-        "url": "file://$templatesDir"
-      }
-    }
-  ]
-}
-EOF
+# Construct a custom registry, additionally test the --registry flag
+nix registry add --registry $registry flake1 git+file://$flake1Dir
+nix registry add --registry $registry flake2 git+file://$flake2Dir
+nix registry add --registry $registry flake3 git+file://$flake3Dir
+nix registry add --registry $registry flake4 flake3
+nix registry add --registry $registry flake5 hg+file://$flake5Dir
+nix registry add --registry $registry nixpkgs flake1
+nix registry add --registry $registry templates git+file://$templatesDir
 
 # Test 'nix flake list'.
 [[ $(nix registry list | wc -l) == 7 ]]
@@ -405,6 +343,8 @@ nix registry add flake1 flake3
 [[ $(nix registry list | wc -l) == 8 ]]
 nix registry pin flake1
 [[ $(nix registry list | wc -l) == 8 ]]
+nix registry pin flake1 flake3
+[[ $(nix registry list | wc -l) == 8 ]]
 nix registry remove flake1
 [[ $(nix registry list | wc -l) == 7 ]]
 

tests/gc.sh

@@ -12,7 +12,7 @@ ln -sf $outPath "$NIX_STATE_DIR"/gcroots/foo
 nix-store --gc --print-roots | grep $outPath
 nix-store --gc --print-live | grep $outPath
 nix-store --gc --print-dead | grep $drvPath
-if nix-store --gc --print-dead | grep $outPath; then false; fi
+if nix-store --gc --print-dead | grep -E $outPath$; then false; fi
 
 nix-store --gc --print-dead
 

tests/init.sh

@@ -35,5 +35,3 @@ nix-store --init
 
 # Did anything happen?
 test -e "$NIX_STATE_DIR"/db/db.sqlite
-
-echo 'Hello World' > ./dummy

tests/local.mk

@@ -2,6 +2,7 @@ nix_tests = \
   hash.sh lang.sh add.sh simple.sh dependencies.sh \
   config.sh \
   gc.sh \
+  ca/gc.sh \
   gc-concurrent.sh \
   gc-auto.sh \
   referrers.sh user-envs.sh logging.sh nix-build.sh misc.sh fixed.sh \
@@ -38,6 +39,7 @@ nix_tests = \
   search.sh \
   nix-copy-ssh.sh \
   post-hook.sh \
+  ca/post-hook.sh \
   function-trace.sh \
   recursive.sh \
   describe-stores.sh \
@@ -46,9 +48,12 @@ nix_tests = \
   compute-levels.sh \
   ca/build.sh \
   ca/build-with-garbage-path.sh \
+  ca/duplicate-realisation-in-closure.sh \
   ca/substitute.sh \
   ca/signatures.sh \
+  ca/nix-shell.sh \
   ca/nix-run.sh \
+  ca/recursive.sh \
   ca/nix-copy.sh
   # parallel.sh
 

tests/nix-shell.sh

@@ -2,6 +2,20 @@ source common.sh
 
 clearStore
 
+if [[ -n ${CONTENT_ADDRESSED:-} ]]; then
+    nix-shell () {
+        command nix-shell --arg contentAddressed true "$@"
+    }
+
+    nix_develop() {
+        nix develop --arg contentAddressed true "$@"
+    }
+else
+    nix_develop() {
+        nix develop "$@"
+    }
+fi
+
 # Test nix-shell -A
 export IMPURE_VAR=foo
 export SELECTED_IMPURE_VAR=baz
@@ -41,7 +55,7 @@ output=$(NIX_PATH=nixpkgs=shell.nix nix-shell --pure -p foo bar --run 'echo "$(f
 [ "$output" = "foo bar" ]
 
 # Test nix-shell shebang mode
-sed -e "s|@ENV_PROG@|$(type -p env)|" shell.shebang.sh > $TEST_ROOT/shell.shebang.sh
+sed -e "s|@ENV_PROG@|$(type -P env)|" shell.shebang.sh > $TEST_ROOT/shell.shebang.sh
 chmod a+rx $TEST_ROOT/shell.shebang.sh
 
 output=$($TEST_ROOT/shell.shebang.sh abc def)
@@ -49,7 +63,7 @@ output=$($TEST_ROOT/shell.shebang.sh abc def)
 
 # Test nix-shell shebang mode again with metacharacters in the filename.
 # First word of filename is chosen to not match any file in the test root.
-sed -e "s|@ENV_PROG@|$(type -p env)|" shell.shebang.sh > $TEST_ROOT/spaced\ \\\'\"shell.shebang.sh
+sed -e "s|@ENV_PROG@|$(type -P env)|" shell.shebang.sh > $TEST_ROOT/spaced\ \\\'\"shell.shebang.sh
 chmod a+rx $TEST_ROOT/spaced\ \\\'\"shell.shebang.sh
 
 output=$($TEST_ROOT/spaced\ \\\'\"shell.shebang.sh abc def)
@@ -58,7 +72,7 @@ output=$($TEST_ROOT/spaced\ \\\'\"shell.shebang.sh abc def)
 # Test nix-shell shebang mode for ruby
 # This uses a fake interpreter that returns the arguments passed
 # This, in turn, verifies the `rc` script is valid and the `load()` script (given using `-e`) is as expected.
-sed -e "s|@SHELL_PROG@|$(type -p nix-shell)|" shell.shebang.rb > $TEST_ROOT/shell.shebang.rb
+sed -e "s|@SHELL_PROG@|$(type -P nix-shell)|" shell.shebang.rb > $TEST_ROOT/shell.shebang.rb
 chmod a+rx $TEST_ROOT/shell.shebang.rb
 
 output=$($TEST_ROOT/shell.shebang.rb abc ruby)
@@ -66,21 +80,27 @@ output=$($TEST_ROOT/shell.shebang.rb abc ruby)
 
 # Test nix-shell shebang mode for ruby again with metacharacters in the filename.
 # Note: fake interpreter only space-separates args without adding escapes to its output.
-sed -e "s|@SHELL_PROG@|$(type -p nix-shell)|" shell.shebang.rb > $TEST_ROOT/spaced\ \\\'\"shell.shebang.rb
+sed -e "s|@SHELL_PROG@|$(type -P nix-shell)|" shell.shebang.rb > $TEST_ROOT/spaced\ \\\'\"shell.shebang.rb
 chmod a+rx $TEST_ROOT/spaced\ \\\'\"shell.shebang.rb
 
 output=$($TEST_ROOT/spaced\ \\\'\"shell.shebang.rb abc ruby)
 [ "$output" = '-e load(ARGV.shift) -- '"$TEST_ROOT"'/spaced \'\''"shell.shebang.rb abc ruby' ]
 
 # Test 'nix develop'.
-nix develop -f shell.nix shellDrv -c bash -c '[[ -n $stdenv ]]'
+nix_develop -f shell.nix shellDrv -c bash -c '[[ -n $stdenv ]]'
 
 # Ensure `nix develop -c` preserves stdin
 echo foo | nix develop -f shell.nix shellDrv -c cat | grep -q foo
 
 # Ensure `nix develop -c` actually executes the command if stdout isn't a terminal
-nix develop -f shell.nix shellDrv -c echo foo |& grep -q foo
+nix_develop -f shell.nix shellDrv -c echo foo |& grep -q foo
 
 # Test 'nix print-dev-env'.
+[[ $(nix print-dev-env -f shell.nix shellDrv --json | jq -r .variables.arr1.value[2]) = '3 4' ]]
+
 source <(nix print-dev-env -f shell.nix shellDrv)
 [[ -n $stdenv ]]
+[[ ${arr1[2]} = "3 4" ]]
+[[ ${arr2[1]} = $'\n' ]]
+[[ ${arr2[2]} = $'x\ny' ]]
+[[ $(fun) = blabla ]]

tests/post-hook.sh

@@ -4,7 +4,7 @@ clearStore
 
 rm -f $TEST_ROOT/result
 
-export REMOTE_STORE=$TEST_ROOT/remote_store
+export REMOTE_STORE=file:$TEST_ROOT/remote_store
 
 # Build the dependencies and push them to the remote store
 nix-build -o $TEST_ROOT/result dependencies.nix --post-build-hook $PWD/push-to-store.sh

tests/recursive.sh

@@ -9,9 +9,9 @@ rm -f $TEST_ROOT/result
 
 export unreachable=$(nix store add-path ./recursive.sh)
 
-NIX_BIN_DIR=$(dirname $(type -p nix)) nix --experimental-features 'nix-command recursive-nix' build -o $TEST_ROOT/result -L --impure --expr '
+NIX_BIN_DIR=$(dirname $(type -p nix)) nix --extra-experimental-features 'nix-command recursive-nix' build -o $TEST_ROOT/result -L --impure --expr '
   with import ./config.nix;
-  mkDerivation {
+  mkDerivation rec {
     name = "recursive";
     dummy = builtins.toFile "dummy" "bla bla";
     SHELL = shell;
@@ -19,11 +19,13 @@ NIX_BIN_DIR=$(dirname $(type -p nix)) nix --experimental-features 'nix-command r
     # Note: this is a string without context.
     unreachable = builtins.getEnv "unreachable";
 
+    NIX_TESTS_CA_BY_DEFAULT = builtins.getEnv "NIX_TESTS_CA_BY_DEFAULT";
+
     requiredSystemFeatures = [ "recursive-nix" ];
 
     buildCommand = '\'\''
       mkdir $out
-      opts="--experimental-features nix-command"
+      opts="--experimental-features nix-command ${if (NIX_TESTS_CA_BY_DEFAULT == "1") then "--extra-experimental-features ca-derivations" else ""}"
 
       PATH=${builtins.getEnv "NIX_BIN_DIR"}:$PATH
 
@@ -46,16 +48,15 @@ NIX_BIN_DIR=$(dirname $(type -p nix)) nix --experimental-features 'nix-command r
       # Add it to our closure.
       ln -s $foobar $out/foobar
 
-      [[ $(nix $opts path-info --all | wc -l) -eq 3 ]]
+      [[ $(nix $opts path-info --all | wc -l) -eq 4 ]]
 
       # Build a derivation.
       nix $opts build -L --impure --expr '\''
-        derivation {
+        with import ${./config.nix};
+        mkDerivation {
           name = "inner1";
-          builder = builtins.getEnv "SHELL";
-          system = builtins.getEnv "system";
+          buildCommand = "echo $fnord blaat > $out";
           fnord = builtins.toFile "fnord" "fnord";
-          args = [ "-c" "echo $fnord blaat > $out" ];
         }
       '\''
 

tests/shell.nix

@@ -1,6 +1,18 @@
-{ inNixShell ? false }:
+{ inNixShell ? false, contentAddressed ? false }:
 
-with import ./config.nix;
+let cfg = import ./config.nix; in
+with cfg;
+
+let
+  mkDerivation =
+    if contentAddressed then
+      args: cfg.mkDerivation ({
+        __contentAddressed = true;
+        outputHashMode = "recursive";
+        outputHashAlgo = "sha256";
+      } // args)
+    else cfg.mkDerivation;
+in
 
 let pkgs = rec {
   setupSh = builtins.toFile "setup" ''
@@ -16,6 +28,12 @@ let pkgs = rec {
         export "''${o}"
       done
     fi
+
+    declare -a arr1=(1 2 "3 4" 5)
+    declare -a arr2=(x $'\n' $'x\ny')
+    fun() {
+      echo blabla
+    }
   '';
 
   stdenv = mkDerivation {
@@ -30,6 +48,8 @@ let pkgs = rec {
     name = "shellDrv";
     builder = "/does/not/exist";
     VAR_FROM_NIX = "bar";
+    ASCII_PERCENT = "%";
+    ASCII_AT = "@";
     TEST_inNixShell = if inNixShell then "true" else "false";
     inherit stdenv;
     outputs = ["dev" "out"];

tests/tarball.sh

@@ -40,6 +40,11 @@ test_tarball() {
     (! nix-instantiate --eval -E '<fnord/xyzzy> 1' -I fnord=file://no-such-tarball$ext)
 
     nix-instantiate --eval -E '<fnord/config.nix>' -I fnord=file://no-such-tarball$ext -I fnord=.
+
+    # Ensure that the `name` attribute isn’t accepted as that would mess
+    # with the content-addressing
+    (! nix-instantiate --eval -E "fetchTree { type = \"tarball\"; url = file://$tarball; narHash = \"$hash\"; name = \"foo\"; }")
+
 }
 
 test_tarball '' cat