garble/testdata/scripts/syntax.txt

env GOPRIVATE='test/main,rsc.io/*'

garble build -tags directives
exec ./main$exe
cmp stderr main.stderr

! binsubstr main$exe 'localName' 'globalConst' 'globalVar' 'globalType' 'valuable information' 'rsc.io' 'remoteIntReturn' 'intReturn'
binsubstr main$exe 'magicFunc'

[short] stop # no need to verify this with -short

go build -tags directives
exec ./main$exe
cmp stderr main.stderr

binsubstr main$exe 'globalVar' # 'globalType' only matches on go < 1.15
! binsubstr main$exe 'localName' 'globalConst' 'remoteIntReturn' 'intReturn'


-- go.mod --
module test/main
-- main.go --
package main

import (
	"encoding/json"
	"go/ast"

	"rsc.io/quote"
	"test/main/sub"
)

// This comment contains valuable information. Ensure it's not in the final binary.
var V interface{}

type T struct {
	ast.Node
	*ast.Ident
}

type EncodingT struct {
	Foo int
}

type Embedded int

type Embedding struct {
	Embedded
}

type embedded int

type embedding struct {
	embedded
}

// embedded fields whose type is in the universe scope used to crash garble
type EmbeddingUniverseScope struct {
	error
	int
	string
}

func main() {
	switch V := V.(type) {
	case int:
		var _ int = V
	case nil:
		println("nil case")
	}

	enc, _ := json.Marshal(EncodingT{Foo: 3})
	println(string(enc))
	scopesTest()
	println(quote.Go())
	sub.Test()
	sub.TestDirectives()
}

-- scopes.go --
package main

const globalConst = 1

type globalType int

var (
	globalVar                 = 1
	globalVarTyped globalType = 1
)

func scopesTest() {
	println(globalVar, globalConst, globalVarTyped)
	const localNameConst = 1

	localNameShort := 4

	type localNameType int

	var (
		localNameVar                   = 5
		localNameTypeVar localNameType = 1
	)

	println(localNameConst, localNameShort, localNameVar, localNameTypeVar, input("input"))
}

func input(localNameParam string) (localNameReturn string) { return localNameParam }

-- sub/names.go --
package sub

var someGlobalVar0 = "0"
var someGlobalVar1 = "1"
var someGlobalVar2 = "2"

func Test() {
    var A, B, C, D, E string
    noop(A, B, C, D, E)
    if someGlobalVar0 != "0" || someGlobalVar1 != "1" || someGlobalVar2 != "2"{
        panic("name collision detected")
    }
}

func noop(...interface{}) {}

-- sub/directives.go --
// +build directives

package sub

import (
    _ "unsafe"
    _ "test/main/sub/a"
)

//go:linkname remoteIntReturn a.magicFunc

func remoteIntReturn() int

//go:noinline
func TestDirectives() {
    if remoteIntReturn() != 42 {
        panic("invalid result")
    }
}
-- sub/a/directives.go --
// +build directives

package a

import _ "unsafe"

//go:linkname intReturn a.magicFunc

//go:noinline
func intReturn() int {
    return 42
}
-- main.stderr --
nil case
{"Foo":3}
1 1 1
1 4 5 1 input
Don't communicate by sharing memory, share memory by communicating.