support output-file without extension in project index

Author: jjallaire

src/command/render/output.ts

@@ -30,6 +30,7 @@ import {
   contextPdfOutputRecipe,
   useContextPdfOutputRecipe,
 } from "./output-tex.ts";
+import { formatOutputFile } from "../../core/render.ts";
 
 // render commands imply the --output argument for pandoc and the final
 // output file to create for the user, but we need a 'recipe' to go from
@@ -50,11 +51,8 @@ export function outputRecipe(
   // could be within metadata)
   let output = options.flags?.output;
   if (!output) {
-    let outputFile = format.pandoc[kOutputFile];
+    const outputFile = formatOutputFile(format);
     if (outputFile) {
-      if (!outputFile.match(/\..+$/) && format.render[kOutputExt]) {
-        outputFile = `${outputFile}.${format.render[kOutputExt]}`;
-      }
       if (isAbsolute(outputFile)) {
         output = outputFile;
       } else {

src/core/render.ts

@@ -5,6 +5,8 @@
 *
 */
 
+import { kOutputExt, kOutputFile } from "../config/constants.ts";
+import { Format } from "../config/types.ts";
 import { dirAndStem } from "./path.ts";
 
 export function inputFilesDir(input: string) {
@@ -21,3 +23,13 @@ export function figuresDir(pandocTo?: string) {
   pandocTo = (pandocTo || "html").replace(/[\+\-].*$/, "");
   return "figure-" + pandocTo;
 }
+
+export function formatOutputFile(format: Format) {
+  let outputFile = format.pandoc[kOutputFile];
+  if (outputFile) {
+    if (!outputFile.match(/\..+$/) && format.render[kOutputExt]) {
+      outputFile = `${outputFile}.${format.render[kOutputExt]}`;
+    }
+  }
+  return outputFile;
+}

src/project/project-index.ts

@@ -34,6 +34,7 @@ import {
   normalizeWebsiteFormat,
 } from "./types/website/website-config.ts";
 import { kDefaultProjectFileContents } from "./types/project-default.ts";
+import { formatOutputFile } from "../core/render.ts";
 
 export interface InputTargetIndex extends Metadata {
   title?: string;
@@ -167,7 +168,7 @@ export async function resolveInputTarget(
     const formats = formatsPreferHtml(index.formats) as Record<string, Format>;
     const format = Object.values(formats)[0];
     const [hrefDir, hrefStem] = dirAndStem(href);
-    const outputFile = format.pandoc[kOutputFile] || `${hrefStem}.html`;
+    const outputFile = formatOutputFile(format) || `${hrefStem}.html`;
     const outputHref = pathWithForwardSlashes(
       (absolute ? "/" : "") + join(hrefDir, outputFile),
     );