CLI --debug option

src/TypeGraph.ts

@@ -121,6 +121,8 @@ export class TypeGraph {
 
     private _parents: Set<Type>[] | undefined = undefined;
 
+    private _printOnRewrite: boolean = false;
+
     constructor(typeBuilder: TypeBuilder, private readonly _haveProvenanceAttributes: boolean) {
         this._typeBuilder = typeBuilder;
     }
@@ -214,6 +216,10 @@ export class TypeGraph {
         }).reduce<Set<TypeRef>>((a, b) => a.union(b));
     }
 
+    setPrintOnRewrite(): void {
+        this._printOnRewrite = true;
+    }
+
     // Each array in `replacementGroups` is a bunch of types to be replaced by a
     // single new type.  `replacer` is a function that takes a group and a
     // TypeBuilder, and builds a new type with that builder that replaces the group.
@@ -250,8 +256,11 @@ export class TypeGraph {
             }
         }
 
-        // console.log(`\n# ${title}`);
-        // this.printGraph();
+        if (this._printOnRewrite) {
+            newGraph.setPrintOnRewrite();
+            console.log(`\n# ${title}`);
+            newGraph.printGraph();
+        }
 
         return newGraph;
     }

src/cli.ts

@@ -65,6 +65,7 @@ export interface CLIOptions {
     help: boolean;
     quiet: boolean;
     version: boolean;
+    debug?: string;
 }
 
 async function sourceFromFileOrUrlArray(name: string, filesOrUrls: string[]): Promise<JSONTypeSource> {
@@ -241,7 +242,8 @@ function inferOptions(opts: Partial<CLIOptions>): CLIOptions {
         graphqlIntrospect: opts.graphqlIntrospect,
         graphqlServerHeader: opts.graphqlServerHeader,
         addSchemaTopLevel: opts.addSchemaTopLevel,
-        template: opts.template
+        template: opts.template,
+        debug: opts.debug
     };
     /* tslint:enable */
 }
@@ -372,6 +374,12 @@ const optionDefinitions: OptionDefinition[] = [
         type: Boolean,
         description: "Don't show issues in the generated code."
     },
+    {
+        name: "debug",
+        type: String,
+        typeLabel: "OPTIONS",
+        description: "Comma separated debug options: print-graph"
+    },
     {
         name: "help",
         alias: "h",
@@ -644,6 +652,12 @@ export async function main(args: string[] | Partial<CLIOptions>) {
             handlebarsTemplate = fs.readFileSync(options.template, "utf8");
         }
 
+        let debugPrintGraph = false;
+        if (options.debug !== undefined) {
+            assert(options.debug === "print-graph", "The --debug option must be \"print-graph\"");
+            debugPrintGraph = true;
+        }
+        
         let run = new Run({
             lang: options.lang,
             sources,
@@ -660,7 +674,8 @@ export async function main(args: string[] | Partial<CLIOptions>) {
             handlebarsTemplate,
             findSimilarClassesSchemaURI: options.findSimilarClassesSchema,
             outputFilename: options.out !== undefined ? path.basename(options.out) : undefined,
-            schemaStore: new FetchingJSONSchemaStore()
+            schemaStore: new FetchingJSONSchemaStore(),
+            debugPrintGraph
         });
 
         const resultsByFilename = await run.run();

src/index.ts

@@ -97,6 +97,7 @@ export interface Options {
     indentation: string | undefined;
     outputFilename: string;
     schemaStore: JSONSchemaStore | undefined;
+    debugPrintGraph: boolean | undefined;
 }
 
 const defaultOptions: Options = {
@@ -116,7 +117,8 @@ const defaultOptions: Options = {
     rendererOptions: {},
     indentation: undefined,
     outputFilename: "stdout",
-    schemaStore: undefined
+    schemaStore: undefined,
+    debugPrintGraph: false
 };
 
 type InputData = {
@@ -224,7 +226,10 @@ export class Run {
         }
 
         let graph = typeBuilder.finish();
-        // graph.printGraph();
+        if (this._options.debugPrintGraph) {
+            graph.setPrintOnRewrite();
+            graph.printGraph();
+        }
 
         if (haveSchemas) {
             let intersectionsDone = false;
@@ -272,8 +277,10 @@ export class Run {
         graph = graph.garbageCollect(this._options.alphabetizeProperties);
 
         gatherNames(graph);
-
-        // graph.printGraph();
+        if (this._options.debugPrintGraph) {
+            console.log("\n# gather names");
+            graph.printGraph();
+        }
 
         return graph;
     }