version: force proper typing on version literals

resources/build-npm.js

@@ -35,16 +35,29 @@ if (require.main === module) {
     }
   }
 
-  const tsProgram = ts.createProgram(['src/index.ts'], {
-    ...ts.getDefaultCompilerOptions(),
+  // Based on https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#getting-the-dts-from-a-javascript-file
+  const tsConfig = JSON.parse(
+    fs.readFileSync(require.resolve('../tsconfig.json'), 'utf-8'),
+  );
+  assert(
+    tsConfig.compilerOptions,
+    '"tsconfig.json" should have `compilerOptions`',
+  );
+  const tsOptions = {
+    ...tsConfig.compilerOptions,
+    noEmit: false,
     declaration: true,
     declarationDir: './npmDist',
     emitDeclarationOnly: true,
-  });
+  };
 
-  const tsResult = tsProgram.emit(undefined, (filepath, body) => {
+  const tsHost = ts.createCompilerHost(tsOptions);
+  tsHost.writeFile = (filepath, body) => {
     writeGeneratedFile(filepath, body);
-  });
+  };
+
+  const tsProgram = ts.createProgram(['src/index.ts'], tsOptions, tsHost);
+  const tsResult = tsProgram.emit();
   assert(
     !tsResult.emitSkipped,
     'Fail to generate `*.d.ts` files, please run `npm run check`',

resources/gen-version.js

@@ -18,16 +18,18 @@ const body = `
 /**
  * A string containing the version of the GraphQL.js library
  */
-export const version = '${version}';
+export const version = '${version}' as string;
 
 /**
  * An object containing the components of the GraphQL.js version string
  */
 export const versionInfo = Object.freeze({
-  major: ${major},
-  minor: ${minor},
-  patch: ${patch},
-  preReleaseTag: ${preReleaseTag ? `'${preReleaseTag}'` : 'null'},
+  major: ${major} as number,
+  minor: ${minor} as number,
+  patch: ${patch} as number,
+  preReleaseTag: ${
+    preReleaseTag ? `'${preReleaseTag}'` : 'null'
+  } as string | null,
 });
 `;
 

src/version.ts

@@ -4,14 +4,14 @@
 /**
  * A string containing the version of the GraphQL.js library
  */
-export const version = '16.0.0-rc.7';
+export const version = '16.0.0-rc.7' as string;
 
 /**
  * An object containing the components of the GraphQL.js version string
  */
 export const versionInfo = Object.freeze({
-  major: 16,
-  minor: 0,
-  patch: 0,
-  preReleaseTag: 'rc.7',
+  major: 16 as number,
+  minor: 0 as number,
+  patch: 0 as number,
+  preReleaseTag: 'rc.7' as string | null,
 });