chrome - change back to --headless as default.

And keep option to set it to old for QUARTO_CHROMIUM specified version

Author: cderv

news/changelog-1.7.md

@@ -66,3 +66,4 @@ All changes included in 1.7:
 - ([#11441](https://github.com/quarto-dev/quarto-cli/issues/11441)): Don't add newlines around shortcodes during processing.
 - ([#11643](https://github.com/quarto-dev/quarto-cli/issues/11643)): Improve highlighting of nested code block inside markdown code block, i.e. using ` ```{{python}} ` or ` ```python ` inside ` ````markdown` fenced code block.
 - ([fb38eb5](https://github.com/quarto-dev/quarto-cli/commit/fb38eb56c11e09f44cef58fd3b697ff24bb5a3f3)) Use the `latest` parser for Acorn when analyzing JS code imported from OJS blocks.
+- ([#10532](https://github.com/quarto-dev/quarto-cli/issues/10532)): Quarto changed default of `--headless=old` to `--headless` as [Chrome 132 has removed old headless mode](https://developer.chrome.com/blog/removing-headless-old-from-chrome) and only support new mode. For using old mode, `QUARTO_CHROMIUM` could be set to a [new `chrome-headless-shell` binary](https://developer.chrome.com/blog/chrome-headless-shell) or too an older chrome version (between 128 and 132) and `QUARTO_CHROMIUM_HEADLESS_MODE` set to `old` for using old headless mode with that compatabitle version.

src/core/cri/cri.ts

@@ -85,7 +85,7 @@ export async function criClient(appPath?: string, port?: number) {
   const app: string = appPath || await getBrowserExecutablePath();
 
   // Allow to adapt the headless mode depending on the Chrome version
-  const headlessMode = getenv("QUARTO_CHROMIUM_HEADLESS_MODE", "old");
+  const headlessMode = getenv("QUARTO_CHROMIUM_HEADLESS_MODE", "none");
 
   const cmd = [
     app,
@@ -97,6 +97,9 @@ export async function criClient(appPath?: string, port?: number) {
     // move to the new mode. We'll use `--headless=old` as the default for now
     // until the new mode is more stable, or until we really pin a version as default to be used.
     // This is also impacting in chromote and pagedown R packages and we could keep syncing with them.
+    // EDIT: 17/01/2025 - old mode is gone in Chrome 132. Let's default to new mode to unbreak things.
+    // Best course of action is to pin a version of Chrome and use the chrome-headless-shell more adapted to our need.
+    // ref: https://developer.chrome.com/blog/chrome-headless-shell
     `--headless${headlessMode == "none" ? "" : "=" + headlessMode}`,
     "--no-sandbox",
     "--disable-gpu",