50 lines
1.6 KiB
Go
50 lines
1.6 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package packagesdriver fetches type sizes for go/packages and go/analysis.
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package packagesdriver
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import (
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"context"
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"fmt"
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"go/types"
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"strings"
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"golang.org/x/tools/internal/gocommand"
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)
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var debug = false
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func GetSizesGolist(ctx context.Context, inv gocommand.Invocation, gocmdRunner *gocommand.Runner) (types.Sizes, error) {
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inv.Verb = "list"
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inv.Args = []string{"-f", "{{context.GOARCH}} {{context.Compiler}}", "--", "unsafe"}
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stdout, stderr, friendlyErr, rawErr := gocmdRunner.RunRaw(ctx, inv)
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var goarch, compiler string
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if rawErr != nil {
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if rawErrMsg := rawErr.Error(); strings.Contains(rawErrMsg, "cannot find main module") || strings.Contains(rawErrMsg, "go.mod file not found") {
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// User's running outside of a module. All bets are off. Get GOARCH and guess compiler is gc.
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// TODO(matloob): Is this a problem in practice?
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inv.Verb = "env"
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inv.Args = []string{"GOARCH"}
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envout, enverr := gocmdRunner.Run(ctx, inv)
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if enverr != nil {
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return nil, enverr
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}
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goarch = strings.TrimSpace(envout.String())
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compiler = "gc"
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} else {
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return nil, friendlyErr
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}
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} else {
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fields := strings.Fields(stdout.String())
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if len(fields) < 2 {
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return nil, fmt.Errorf("could not parse GOARCH and Go compiler in format \"<GOARCH> <compiler>\":\nstdout: <<%s>>\nstderr: <<%s>>",
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stdout.String(), stderr.String())
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}
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goarch = fields[0]
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compiler = fields[1]
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}
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return types.SizesFor(compiler, goarch), nil
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}
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