[short] skip

# Test building in overlays.
# TODO(#39958): add a test case where the destination file in the replace map
#   isn't a go file. Either completely exclude that case in fs.IsDirWithGoFiles
#   if the compiler doesn't allow it, or test that it works all the way.
# TODO(#39958): add a test that both gc and gccgo assembly files can include .h
#   files.

# The main package (m) is contained in an overlay. It imports m/dir2 which has one
# file in an overlay and one file outside the overlay, which in turn imports m/dir,
# which only has source files in the overlay.

cd m

! go build .
go build -overlay overlay.json -o main$GOEXE .
exec ./main$goexe
stdout '^hello$'

go build -overlay overlay.json -o print_abspath$GOEXE ./printpath
exec ./print_abspath$GOEXE
stdout $WORK[/\\]gopath[/\\]src[/\\]m[/\\]printpath[/\\]main.go

go vet -overlay overlay.json ./printpath

go build -overlay overlay.json -o print_trimpath$GOEXE -trimpath ./printpath
exec ./print_trimpath$GOEXE
stdout ^m[/\\]printpath[/\\]main.go

go build -overlay overlay.json -o print_trimpath_two_files$GOEXE printpath/main.go printpath/other.go
exec ./print_trimpath_two_files$GOEXE
stdout $WORK[/\\]gopath[/\\]src[/\\]m[/\\]printpath[/\\]main.go
stdout $WORK[/\\]gopath[/\\]src[/\\]m[/\\]printpath[/\\]other.go

go build -overlay overlay.json -o main_call_asm$GOEXE ./call_asm
exec ./main_call_asm$GOEXE
! stdout .

# Change the contents of a file in the overlay and ensure that makes the target stale
env OLD_GOCACHE=$GOCACHE
env GOCACHE=$WORK/cache  # use a fresh cache so that multiple runs of the test don't interfere
go build -x -overlay overlay.json ./test_cache
stderr '(compile|gccgo)( |\.exe).*test_cache.go'
go build -x -overlay overlay.json ./test_cache
! stderr '(compile|gccgo)( |\.exe).*test_cache.go'  # cached
cp overlay/test_cache_different.go overlay/test_cache.go
go build -x -overlay overlay.json ./test_cache
stderr '(compile|gccgo)( |\.exe).*test_cache.go'  # not cached
env CACHE=$OLD_GOCACHE

-- m/go.mod --
// TODO(matloob): how do overlays work with go.mod (especially if mod=readonly)
module m

go 1.16

-- m/dir2/h.go --
package dir2

func PrintMessage() {
	printMessage()
}
-- m/dir/foo.txt --
The build action code currently expects the package directory
to exist, so it can run the compiler in that directory.
TODO(matloob): Remove this requirement.
-- m/printpath/about.txt --
the actual code is in the overlay
-- m/overlay.json --
{
	"Replace": {
		"f.go": "overlay/f.go",
		"dir/g.go": "overlay/dir_g.go",
		"dir2/i.go": "overlay/dir2_i.go",
		"printpath/main.go": "overlay/printpath.go",
		"printpath/other.go": "overlay2/printpath2.go",
		"call_asm/asm_gc.s": "overlay/asm_gc.s",
		"call_asm/asm_gccgo.s": "overlay/asm_gccgo.s",
		"test_cache/main.go": "overlay/test_cache.go"
	}
}
-- m/overlay/f.go --
package main

import "m/dir2"

func main() {
	dir2.PrintMessage()
}
-- m/call_asm/main.go --
package main

func foo() // There will be a "missing function body" error if the assembly file isn't found.

func main() {
	foo()
}
-- m/overlay/dir_g.go --
package dir

import "fmt"

func PrintMessage() {
	fmt.Println("hello")
}
-- m/overlay/printpath.go --
package main

import (
	"fmt"
	"path/filepath"
	"runtime"
)

func main() {
	_, file, _, _ := runtime.Caller(0)

	// Since https://golang.org/cl/214286, the runtime's debug paths are
	// slash-separated regardless of platform, so normalize them to system file
	// paths.
	fmt.Println(filepath.FromSlash(file))
}
-- m/overlay2/printpath2.go --
package main

import (
	"fmt"
	"path/filepath"
	"runtime"
)

func init() {
	_, file, _, _ := runtime.Caller(0)
	fmt.Println(filepath.FromSlash(file))
}
-- m/overlay/dir2_i.go --
package dir2

import "m/dir"

func printMessage() {
	dir.PrintMessage()
}
-- m/overlay/asm_gc.s --
// +build gc

TEXT ·foo(SB),0,$0
	RET

-- m/overlay/asm_gccgo.s --
// +build gccgo

.globl main.foo
.text
main.foo:
	ret

-- m/overlay/test_cache.go --
package foo

import "fmt"

func bar() {
	fmt.Println("something")
}
-- m/overlay/test_cache_different.go --
package foo

import "fmt"

func bar() {
	fmt.Println("different")
}