wasm: add test for disallowed JS/WASM dependencies

Ensures that binary size gains like the ones from #4802 and #4813
don't regress.

Updates #3517

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
pull/4822/head
Mihai Parparita 3 years ago committed by Mihai Parparita
parent c41837842b
commit 6246fa32f0

@ -0,0 +1,36 @@
// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package jsdeps is a just a list of the packages we import in the
// JavaScript/WASM build, to let us test that our transitive closure of
// dependencies on iOS doesn't accidentally grow too large, since binary size
// is more of a concern there.
package jsdeps
import (
_ "bytes"
_ "context"
_ "encoding/hex"
_ "encoding/json"
_ "fmt"
_ "log"
_ "math/rand"
_ "net"
_ "strings"
_ "time"
_ "golang.org/x/crypto/ssh"
_ "inet.af/netaddr"
_ "tailscale.com/control/controlclient"
_ "tailscale.com/ipn"
_ "tailscale.com/ipn/ipnserver"
_ "tailscale.com/net/netns"
_ "tailscale.com/net/tsdial"
_ "tailscale.com/safesocket"
_ "tailscale.com/tailcfg"
_ "tailscale.com/types/logger"
_ "tailscale.com/wgengine"
_ "tailscale.com/wgengine/netstack"
_ "tailscale.com/words"
)

@ -0,0 +1,42 @@
// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// No need to run this on Windows where CI's slow enough. Then we don't need to
// worry about "go.exe" etc.
//go:build !windows
// +build !windows
package jsdeps
import (
"encoding/json"
"os"
"os/exec"
"path/filepath"
"runtime"
"testing"
)
func TestDeps(t *testing.T) {
cmd := exec.Command(filepath.Join(runtime.GOROOT(), "bin", "go"), "list", "-json", ".")
cmd.Env = append(os.Environ(), "GOOS=js", "GOARCH=wasm")
out, err := cmd.Output()
if err != nil {
t.Fatal(err)
}
var res struct {
Deps []string
}
if err := json.Unmarshal(out, &res); err != nil {
t.Fatal(err)
}
for _, dep := range res.Deps {
switch dep {
case "runtime/pprof", "golang.org/x/net/http2/h2c", "net/http/pprof", "golang.org/x/net/proxy", "github.com/tailscale/goupnp":
t.Errorf("package %q is not allowed as a dependency on JS", dep)
}
}
t.Logf("got %d dependencies", len(res.Deps))
}
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