Simplify the clang example template.

main.c

@@ -4,6 +4,8 @@
 #include "config.h"
 #include "dyn_array.h"
 
+const char *ENV_SPEC_ROOT_DIR = "SPEC_ROOT_DIR";
+
 int main(int argc, char **argv) {
   int num = 0;
 
@@ -12,8 +14,10 @@ int main(int argc, char **argv) {
     exit(EXIT_FAILURE);
   }
 
+  const char *root_dir = getenv(ENV_SPEC_ROOT_DIR);
+
   struct Config config;
-  switch (load_config(argv[1], &config)) {
+  switch (load_config(root_dir, argv[1], &config)) {
   case ENV_SPEC_ROOT_DIR_MISSING:
     fprintf(stderr, "Must specify $SPEC_ROOT_DIR environment variable.");
     exit(EXIT_FAILURE);
@@ -23,9 +27,6 @@ int main(int argc, char **argv) {
   case INVALID_TARGET:
     fprintf(stderr, "Target spec `%s` is invalid.", argv[1]);
     exit(EXIT_FAILURE);
-  default:
-    // A return value of `0` indicates no issue.
-    break;
   }
 
   free_config(&config);

specs/clang/run.sh

@@ -1,7 +1,3 @@
 #!/usr/bin/env bash
 
-if [ -z "$VERSION" ]; then
-  VERSION="default"
-fi
-
-cp "$VERSION/flake.nix" "$OUT"
+cp -r "template/*" "$OUT"

specs/clang/spec.json

@@ -1,5 +0,0 @@
-{
-  "versions": [
-    "default"
-  ]
-}

specs/clang/template/.envrc

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+use flake

specs/clang/template/flake.nix

@@ -14,7 +14,6 @@
         pkgs = nixpkgs.legacyPackages.${system};
 
         codelldb = pkgs.writeShellScriptBin "codelldb" ''
-          #!/usr/bin/env bash
           exec ${pkgs.vscode-extensions.vadimcn.vscode-lldb}/share/vscode/extensions/vadimcn.vscode-lldb/adapter/codelldb "$@"
         '';
       in

specs/clang/template/main.c

@@ -0,0 +1,3 @@
+#include <stdlib.h>
+
+int main(int argc, char **argv) { return EXIT_SUCCESS; }