Add support for chromium

Author: coadler

README.md

@@ -9,7 +9,7 @@
 Chrome is recommended.
 
 ```bash
-go get go.coder.com/sshcode
+GO111MODULE=off go get go.coder.com/sshcode
 ```
 
 ## Usage

main.go

@@ -97,11 +97,19 @@ chmod +x ~/bin/code-server
 func openBrowser(url string) {
 	var openCmd *exec.Cmd
 	if commandExists("google-chrome") {
-		openCmd = exec.Command("google-chrome", "--app="+url, "--disable-extensions", "--disable-plugins")
+		openCmd = exec.Command("google-chrome", fmtChromeOptions(url)...)
+
+	} else if commandExists("chromium") {
+		openCmd = exec.Command("chromium", fmtChromeOptions(url)...)
+
+	} else if commandExists("chromium-browser") {
+		openCmd = exec.Command("chromium-browser", fmtChromeOptions(url)...)
+
 	} else if commandExists("firefox") {
 		openCmd = exec.Command("firefox", "--url="+url, "-safe-mode")
+
 	} else {
-		flog.Info("unable to find a browser to open: sshcode only supports firefox and chrome")
+		flog.Info("unable to find a browser to open: sshcode only supports firefox, chrome, and chromium")
 
 		return
 	}
@@ -112,6 +120,10 @@ func openBrowser(url string) {
 	}
 }
 
+func fmtChromeOptions(url string) []string {
+	return []string{"--app=" + url, "--disable-extensions", "--disable-plugins"}
+}
+
 // Checks if a command exists locally.
 func commandExists(name string) bool {
 	_, err := exec.LookPath(name)