cmd/tailscaled, ipn/localapi, util/eventbus: don't link in regexp when debug is omitted

Saves 442 KB. Lock it with a new min test.

Updates #12614

Change-Id: Ia7bf6f797b6cbf08ea65419ade2f359d390f8e91
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

cmd/tailscaled/deps_test.go

@@ -4,9 +4,12 @@
 package main
 
 import (
+	"maps"
+	"slices"
 	"strings"
 	"testing"
 
+	"tailscale.com/feature/featuretags"
 	"tailscale.com/tstest/deptest"
 )
 
@@ -90,19 +93,6 @@ func TestOmitDrive(t *testing.T) {
 	}.Check(t)
 }
 
-func TestOmitTailnetLock(t *testing.T) {
-	deptest.DepChecker{
-		GOOS:   "linux",
-		GOARCH: "amd64",
-		Tags:   "ts_omit_tailnetlock,ts_include_cli",
-		OnDep: func(dep string) {
-			if strings.Contains(dep, "cbor") {
-				t.Errorf("unexpected dep with ts_omit_tailnetlock: %q", dep)
-			}
-		},
-	}.Check(t)
-}
-
 func TestOmitPortmapper(t *testing.T) {
 	deptest.DepChecker{
 		GOOS:   "linux",
@@ -235,3 +225,42 @@ func TestOmitUseProxy(t *testing.T) {
 		},
 	}.Check(t)
 }
+
+func minTags() string {
+	var tags []string
+	for _, f := range slices.Sorted(maps.Keys(featuretags.Features)) {
+		if f.IsOmittable() {
+			tags = append(tags, f.OmitTag())
+		}
+	}
+	return strings.Join(tags, ",")
+}
+
+func TestMinTailscaledNoCLI(t *testing.T) {
+	deptest.DepChecker{
+		GOOS:   "linux",
+		GOARCH: "amd64",
+		Tags:   minTags(),
+		OnDep: func(dep string) {
+			if strings.Contains(dep, "regexp") {
+				t.Errorf("unexpected dep: %q", dep)
+			}
+			if strings.Contains(dep, "cbor") {
+				t.Errorf("unexpected dep: %q", dep)
+			}
+		},
+	}.Check(t)
+}
+
+func TestMinTailscaledWithCLI(t *testing.T) {
+	deptest.DepChecker{
+		GOOS:   "linux",
+		GOARCH: "amd64",
+		Tags:   minTags() + ",ts_include_cli",
+		OnDep: func(dep string) {
+			if strings.Contains(dep, "cbor") {
+				t.Errorf("unexpected dep: %q", dep)
+			}
+		},
+	}.Check(t)
+}