only restrict output dir for knitr

src/command/render/render-files.ts

@@ -66,7 +66,12 @@ import { error, info } from "log/mod.ts";
 import * as ld from "../../core/lodash.ts";
 import { basename, dirname, join, relative } from "path/mod.ts";
 import { Format } from "../../config/types.ts";
-import { figuresDir, inputFilesDir, isServerShiny } from "../../core/render.ts";
+import {
+  figuresDir,
+  inputFilesDir,
+  isServerShiny,
+  isServerShinyKnitr,
+} from "../../core/render.ts";
 import {
   normalizePath,
   removeIfEmptyDir,
@@ -495,10 +500,12 @@ async function renderFileInternal(
         );
         throw new Error();
       } else if (
-        projectOutputDir(context.project) !== normalizePath(context.project.dir)
+        (projectOutputDir(context.project) !==
+          normalizePath(context.project.dir)) &&
+        isServerShinyKnitr(context.format, context.engine.name)
       ) {
         error(
-          `${src} uses server: shiny so cannot be included in a project with an output-dir ` +
+          `${src} is a knitr engine document that uses server: shiny so cannot be included in a project with an output-dir ` +
             `(shiny document output must be rendered alongside its source document).`,
         );
         throw new Error();

src/core/render.ts

@@ -6,7 +6,7 @@
 
 import { kOutputExt, kOutputFile, kServer } from "../config/constants.ts";
 import { Format, Metadata } from "../config/types.ts";
-import { kJupyterEngine } from "../execute/types.ts";
+import { kJupyterEngine, kKnitrEngine } from "../execute/types.ts";
 import { dirAndStem } from "./path.ts";
 import { extname } from "path/mod.ts";
 
@@ -37,6 +37,13 @@ export function isServerShinyPython(
   return isServerShiny(format) && engine === kJupyterEngine;
 }
 
+export function isServerShinyKnitr(
+  format: Format,
+  engine: string | undefined,
+) {
+  return isServerShiny(format) && engine === kKnitrEngine;
+}
+
 export function formatOutputFile(format: Format) {
   let outputFile = format.pandoc[kOutputFile];
   if (outputFile) {