optimize tests for examples

examples/mattermost-webapp/flake.nix

@@ -19,6 +19,7 @@
       source = src;
     })
     // {
-      checks = self.packages;
+      # checks are too expensive
+      # checks = self.packages;
     };
 }

examples/ripgrep/flake.nix

@@ -25,6 +25,6 @@
       ];
     })
     // {
-      checks = self.packages;
+      checks.x86_64-linux.ripgrep = self.packages.x86_64-linux.ripgrep;
     };
 }

tests/examples/default.nix

@@ -1,6 +1,8 @@
 {
   self,
   lib,
+  async,
+  bash,
   coreutils,
   git,
   nix,
@@ -13,6 +15,8 @@
 in
   utils.writePureShellScript
   [
+    async
+    bash
     coreutils
     git
     nix
@@ -24,16 +28,27 @@ in
       examples=$1
     fi
 
+    S=$(mktemp)
+    async -s=$S server --start -j$(nproc)
+    sleep 1
+
     for dir in $examples; do
-      echo -e "\ntesting example for $dir"
-      mkdir tmp
-      cp ${examples}/$dir/* ./tmp/
-      chmod -R +w ./tmp
-      cd ./tmp
-      nix flake lock --override-input dream2nix ${../../.}
-      nix run .#resolveImpure
-      nix flake check
-      cd -
-      rm -r tmp
+      async -s=$S cmd -- bash -c "
+        echo -e \"\ntesting example for $dir\"
+        tmp=\$(mktemp -d)
+        echo \"tempdir: \$tmp\"
+        mkdir \$tmp
+        cp ${examples}/$dir/* \$tmp/
+        chmod -R +w \$tmp
+        cd \$tmp
+        nix flake lock --override-input dream2nix ${../../.}
+        nix run .#resolveImpure
+        nix flake check
+        cd -
+        rm -r \$tmp
+      "
     done
+
+    async -s=$S wait
+    rm $S
   ''