crypto/x509: restore support for ios tag on darwin/amd64

Fixes #38710

Change-Id: I9b210e95fd997ff53ec704c5f61110045aaa94bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/239559
Run-TryBot: Filippo Valsorda <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: FiloSottile

src/cmd/dist/test.go

@@ -461,6 +461,18 @@ func (t *tester) registerTests() {
 		})
 	}
 
+	// Test the ios build tag on darwin/amd64 for the iOS simulator.
+	if goos == "darwin" && !t.iOS() {
+		t.tests = append(t.tests, distTest{
+			name:    "amd64ios",
+			heading: "ios tag on darwin/amd64",
+			fn: func(dt *distTest) error {
+				t.addCmd(dt, "src", t.goTest(), t.timeout(300), "-tags=ios", "-run=SystemRoots", "crypto/x509")
+				return nil
+			},
+		})
+	}
+
 	if t.race {
 		return
 	}

src/crypto/x509/root.go

@@ -4,7 +4,7 @@
 
 package x509
 
-//go:generate go run root_darwin_arm64_gen.go -version 55161.80.1
+//go:generate go run root_darwin_ios_gen.go -version 55161.80.1
 
 import "sync"
 

src/crypto/x509/root_cgo_darwin_amd64.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build !ios
+
 package x509
 
 // This cgo implementation exists only to support side-by-side testing by

src/crypto/x509/root_darwin_amd64.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build !ios
+
 package x509
 
 import (

src/crypto/x509/root_darwin_arm64.go renamed to src/crypto/x509/root_darwin_ios.go

@@ -4,7 +4,7 @@
 
 // +build ignore
 
-// Generates root_darwin_arm64.go.
+// Generates root_darwin_ios.go.
 //
 // As of iOS 13, there is no API for querying the system trusted X.509 root
 // certificates.
@@ -37,7 +37,7 @@ import (
 )
 
 func main() {
-	var output = flag.String("output", "root_darwin_arm64.go", "file name to write")
+	var output = flag.String("output", "root_darwin_ios.go", "file name to write")
 	var version = flag.String("version", "", "security_certificates version")
 	flag.Parse()
 	if *version == "" {
@@ -156,9 +156,10 @@ func main() {
 	}
 }
 
-const header = `// Code generated by root_darwin_arm64_gen.go -version %s; DO NOT EDIT.
+const header = `// Code generated by root_darwin_ios_gen.go -version %s; DO NOT EDIT.
 // Update the version in root.go and regenerate with "go generate".
 
+// +build darwin,arm64 darwin,amd64,ios
 // +build !x509omitbundledroots
 
 package x509

src/crypto/x509/root_darwin_arm64_gen.go renamed to src/crypto/x509/root_darwin_ios_gen.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin,arm64,x509omitbundledroots
+// +build darwin,arm64 darwin,amd64,ios
+// +build x509omitbundledroots
 
 // This file provides the loadSystemRoots func when the
 // "x509omitbundledroots" build tag has disabled bundling a copy,

src/crypto/x509/root_omit.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin,arm64,x509omitbundledroots
+// +build darwin,arm64 darwin,amd64,ios
+// +build x509omitbundledroots
 
 package x509