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tsconnect: add flag to specify control server (#5294)

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To improve the local development experience, this change allows a
control url to be passed in with the `--dev-control=` flag.

If the flag is passed in when not specifying dev, an error is returned.

If no flag is passed, the default remains the Tailscale controlled
control server set by `ipn.DefaultControlURL`.

Co-authored-by: Maisem Ali <maisem@tailscale.com>
Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>
This commit is contained in:
Charlotte Brandhorst-Satzkorn 2022-08-04 13:37:19 -04:00 committed by GitHub
parent f371a1afd9
commit 5055e00cf1
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 10 additions and 1 deletions
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5
cmd/tsconnect/common.go
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@ -88,9 +88,14 @@ func buildWasm(dev bool) error {
log.Printf("Building wasm...\n")
args := []string{"build", "-tags", "tailscale_go,osusergo,netgo,nethttpomithttp2,omitidna,omitpemdecrypt"}
if !dev {
if *devControl != "" {
return fmt.Errorf("Development control URL can only be used in dev mode.")
}
// Omit long paths and debug symbols in release builds, to reduce the
// generated WASM binary size.
args = append(args, "-trimpath", "-ldflags", "-s -w")
} else if *devControl != "" {
args = append(args, "-ldflags", fmt.Sprintf("-X 'main.ControlURL=%v'", *devControl))
}
args = append(args, "-o", "src/main.wasm", "./wasm")
cmd := exec.Command(filepath.Join(runtime.GOROOT(), "bin", "go"), args...)

1
cmd/tsconnect/tsconnect.go
View File

@ -22,6 +22,7 @@
distDir = flag.String("distdir", "./dist", "path of directory to place build output in")
yarnPath = flag.String("yarnpath", "../../tool/yarn", "path yarn executable used to install JavaScript dependencies")
fastCompression = flag.Bool("fast-compression", false, "Use faster compression when building, to speed up build time. Meant to iterative/debugging use only.")
devControl = flag.String("dev-control", "", "URL of a development control server to be used with dev. If provided without specifying dev, an error will be returned.")
)
func main() {

5
cmd/tsconnect/wasm/wasm_js.go
View File

@ -42,6 +42,9 @@
"tailscale.com/words"
)
// ControlURL defines the URL to be used for connection to Control.
var ControlURL = ipn.DefaultControlURL
func main() {
js.Global().Set("newIPN", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
if len(args) != 1 {
@ -244,7 +247,7 @@ func (i *jsIPN) run(jsCallbacks js.Value) {
err := i.lb.Start(ipn.Options{
StateKey: "wasm",
UpdatePrefs: &ipn.Prefs{
ControlURL: ipn.DefaultControlURL,
ControlURL: ControlURL,
RouteAll: false,
AllowSingleHosts: true,
WantRunning: true,