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cmd/go: remove support for -buildmode=shared

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It never worked in module mode (or with a read-only GOROOT).
A proposal to drop it was filed (and approved) in
https://golang.org/issue/47788.

Fixes #47788

Change-Id: I0c12f38eb0c5dfe9384fbdb49ed202301fa4273d
Reviewed-on: https://go-review.googlesource.com/c/go/+/359096
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Bryan C. Mills 2021-10-27 14:29:29 -04:00
parent ffd2284db0
commit 68bd5121ee
44 changed files with 30 additions and 1786 deletions
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78
misc/cgo/testshared/overlaydir_test.go
View file

@ -1,78 +0,0 @@
// Copyright 2019 The Go 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 shared_test
import (
"io"
"os"
"path/filepath"
"strings"
)
// overlayDir makes a minimal-overhead copy of srcRoot in which new files may be added.
//
// TODO: Once we no longer need to support the misc module in GOPATH mode,
// factor this function out into a package to reduce duplication.
func overlayDir(dstRoot, srcRoot string) error {
dstRoot = filepath.Clean(dstRoot)
if err := os.MkdirAll(dstRoot, 0777); err != nil {
return err
}
srcRoot, err := filepath.Abs(srcRoot)
if err != nil {
return err
}
return filepath.Walk(srcRoot, func(srcPath string, info os.FileInfo, err error) error {
if err != nil || srcPath == srcRoot {
return err
}
suffix := strings.TrimPrefix(srcPath, srcRoot)
for len(suffix) > 0 && suffix[0] == filepath.Separator {
suffix = suffix[1:]
}
dstPath := filepath.Join(dstRoot, suffix)
perm := info.Mode() & os.ModePerm
if info.Mode()&os.ModeSymlink != 0 {
info, err = os.Stat(srcPath)
if err != nil {
return err
}
perm = info.Mode() & os.ModePerm
}
// Always copy directories (don't symlink them).
// If we add a file in the overlay, we don't want to add it in the original.
if info.IsDir() {
return os.MkdirAll(dstPath, perm|0200)
}
// If the OS supports symlinks, use them instead of copying bytes.
if err := os.Symlink(srcPath, dstPath); err == nil {
return nil
}
// Otherwise, copy the bytes.
src, err := os.Open(srcPath)
if err != nil {
return err
}
defer src.Close()
dst, err := os.OpenFile(dstPath, os.O_WRONLY|os.O_CREATE|os.O_EXCL, perm)
if err != nil {
return err
}
_, err = io.Copy(dst, src)
if closeErr := dst.Close(); err == nil {
err = closeErr
}
return err
})
}