Installing chromium which is already installed

[SunPodder]

Rod Version: v0.112.5

The code to demonstrate your question

func TestRod(t *testing.T) {
	g := setup(t)
	g.cancelTimeout() // Cancel timeout protection

	// You can use the pre-launched g.browser or g.page for testing
	browser, page := g.browser, g.page

	// You can also use the g.html to serve static html content
	page.MustNavigate(g.html(doc)).MustWaitLoad()

	g.Eq(browser.MustVersion().ProtocolVersion, "1.3")
	g.Has(page.MustElement("body").MustText(), "ok")
}

It's actually the default code of rod_test.go of this repo.

What you got

[launcher.Browser]2023/02/12 10:33:12 try to find the fastest host to download the browser binary
[launcher.Browser]2023/02/12 10:33:12 check https://storage.googleapis.com/chromium-browser-snapshots//1095419/
[launcher.Browser]2023/02/12 10:33:12 check https://registry.npmmirror.com/-/binary/chromium-browser-snapshots//1095419/
[launcher.Browser]2023/02/12 10:33:12 check https://playwright.azureedge.net/builds/chromium/1095419/chromium-linux-arm64.zip
panic: Can't find a browser binary for your OS, the doc might help https://go-rod.github.io/#/compatibility?id=os

What you expected to see

Rod is trying to install chromium though I already have chromium installed and it's available in the PATH. Shouldn't it use the existing one? Why would I need to install it again?

[ysmood]

Rod requires static browser version, or behavior will be different between different browser version, but there's no easy way to check the browser revision (not the version, or we need a version to binary download url map).

Such as if chromium team give us a cli option like:

chromium --revision

But there's no such cli option, if you can help us to find a way then we can make a PR to add this feature.

However, you can use example code like this to use your local binary:

rod/lib/launcher/example_test.go

Lines 13 to 18 in ab8740f

	func Example_use_system_browser() {
	if path, exists := launcher.LookPath(); exists {
	u := launcher.New().Bin(path).MustLaunch()
	rod.New().ControlURL(u).MustConnect()
	}
	}

[SunPodder]

This code will do my work. However, chromium really doesn't have a way to check browser version?

It works on my system though

$ chromium --version
Chromium 109.0.5414.74

[ysmood]

It's revision, not version. As I said, version is useless.

[SunPodder]

So you use hardcoded lookup paths instead of env path. Whatever, my issue has been resolved. #808