[2.3] Add flake for testing purposes

flake.nix

@@ -0,0 +1,56 @@
+{
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  # A very basic flake to conveniently `nix run nix/2.3` for testing.
+  # Note that this release has no built-in support for flakes,
+  # and this flake declaration is provided on a best-effort basis.
+  outputs = { self, nixpkgs, ... }:
+    let
+      inherit (nixpkgs) lib;
+      inherit (lib) flip genAttrs mapAttrs substring;
+      rev = self.sourceInfo.rev or self.sourceInfo.dirtyRev or "";
+      revCount = self.sourceInfo.revCount or 0;
+      shortRev = self.sourceInfo.shortRev or (substring 0 7 rev);
+      release = import ./release.nix {
+        nix = {
+          outPath = ./.;
+          inherit rev revCount shortRev;
+        };
+        nixpkgs = nixpkgs.outPath;
+        officialRelease = false;
+      };
+    in
+  {
+    # inherit release;
+    packages =
+      mapAttrs
+        (system: nix: {
+          default = nix;
+          nix = nix;
+        })
+        release.build;
+    apps =
+      mapAttrs
+        (system: packages:
+          let
+            appFor = mainProgram: {
+              type = "app";
+              program = lib.getExe' packages.nix mainProgram;
+            };
+          in flip genAttrs appFor [
+            "nix"
+            "nix-build"
+            "nix-channel"
+            "nix-collect-garbage"
+            "nix-copy-closure"
+            "nix-daemon"
+            "nix-env"
+            "nix-hash"
+            "nix-instantiate"
+            "nix-prefetch-url"
+            "nix-shell"
+            "nix-store"
+          ])
+        self.packages;
+  };
+}
+

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/check.nix

@@ -11,7 +11,7 @@ with import ./config.nix;
   };
 
   hashmismatch = import <nix/fetchurl.nix> {
-    url = "file://" + toString ./dummy;
+    url = "file://" + builtins.getEnv "TMPDIR" + "/dummy";
     sha256 = "0mdqa9w1p6cmli6976v4wi0sw9r4p5prkj7lzfd1877wk11c9c73";
   };
 

tests/check.sh

@@ -34,9 +34,9 @@ nix-build check.nix -A fetchurl --no-out-link --repair --hashed-mirrors ''
 nix-build check.nix -A hashmismatch --no-out-link --hashed-mirrors '' || status=$?
 [ "$status" = "102" ]
 
-echo -n > ./dummy
+echo -n > $TMPDIR/dummy
 nix-build check.nix -A hashmismatch --no-out-link --hashed-mirrors ''
-echo 'Hello World' > ./dummy
+echo 'Hello World' > $TMPDIR/dummy
 
 nix-build check.nix -A hashmismatch --no-out-link --check --hashed-mirrors '' || status=$?
 [ "$status" = "102" ]