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// Copyright 2020 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 mod
import (
"context"
"fmt"
"os"
"path/filepath"
"golang.org/x/mod/modfile"
"golang.org/x/tools/gopls/internal/lsp/command"
"golang.org/x/tools/gopls/internal/lsp/protocol"
"golang.org/x/tools/gopls/internal/lsp/source"
)
// LensFuncs returns the supported lensFuncs for go.mod files.
func LensFuncs() map[command.Command]source.LensFunc {
return map[command.Command]source.LensFunc{
command.UpgradeDependency: upgradeLenses,
command.Tidy: tidyLens,
command.Vendor: vendorLens,
command.RunGovulncheck: vulncheckLenses,
}
}
func upgradeLenses(ctx context.Context, snapshot source.Snapshot, fh source.FileHandle) ([]protocol.CodeLens, error) {
pm, err := snapshot.ParseMod(ctx, fh)
if err != nil || pm.File == nil {
return nil, err
}
uri := protocol.URIFromSpanURI(fh.URI())
reset, err := command.NewResetGoModDiagnosticsCommand("Reset go.mod diagnostics", command.ResetGoModDiagnosticsArgs{URIArg: command.URIArg{URI: uri}})
if err != nil {
return nil, err
}
// Put the `Reset go.mod diagnostics` codelens on the module statement.
modrng, err := moduleStmtRange(fh, pm)
if err != nil {
return nil, err
}
lenses := []protocol.CodeLens{{Range: modrng, Command: &reset}}
if len(pm.File.Require) == 0 {
// Nothing to upgrade.
return lenses, nil
}
var requires []string
for _, req := range pm.File.Require {
requires = append(requires, req.Mod.Path)
}
checkUpgrade, err := command.NewCheckUpgradesCommand("Check for upgrades", command.CheckUpgradesArgs{
URI: uri,
Modules: requires,
})
if err != nil {
return nil, err
}
upgradeTransitive, err := command.NewUpgradeDependencyCommand("Upgrade transitive dependencies", command.DependencyArgs{
URI: uri,
AddRequire: false,
GoCmdArgs: []string{"-d", "-u", "-t", "./..."},
})
if err != nil {
return nil, err
}
upgradeDirect, err := command.NewUpgradeDependencyCommand("Upgrade direct dependencies", command.DependencyArgs{
URI: uri,
AddRequire: false,
GoCmdArgs: append([]string{"-d"}, requires...),
})
if err != nil {
return nil, err
}
// Put the upgrade code lenses above the first require block or statement.
rng, err := firstRequireRange(fh, pm)
if err != nil {
return nil, err
}
return append(lenses, []protocol.CodeLens{
{Range: rng, Command: &checkUpgrade},
{Range: rng, Command: &upgradeTransitive},
{Range: rng, Command: &upgradeDirect},
}...), nil
}
func tidyLens(ctx context.Context, snapshot source.Snapshot, fh source.FileHandle) ([]protocol.CodeLens, error) {
pm, err := snapshot.ParseMod(ctx, fh)
if err != nil || pm.File == nil {
return nil, err
}
uri := protocol.URIFromSpanURI(fh.URI())
cmd, err := command.NewTidyCommand("Run go mod tidy", command.URIArgs{URIs: []protocol.DocumentURI{uri}})
if err != nil {
return nil, err
}
rng, err := moduleStmtRange(fh, pm)
if err != nil {
return nil, err
}
return []protocol.CodeLens{{
Range: rng,
Command: &cmd,
}}, nil
}
func vendorLens(ctx context.Context, snapshot source.Snapshot, fh source.FileHandle) ([]protocol.CodeLens, error) {
pm, err := snapshot.ParseMod(ctx, fh)
if err != nil || pm.File == nil {
return nil, err
}
if len(pm.File.Require) == 0 {
// Nothing to vendor.
return nil, nil
}
rng, err := moduleStmtRange(fh, pm)
if err != nil {
return nil, err
}
title := "Create vendor directory"
uri := protocol.URIFromSpanURI(fh.URI())
cmd, err := command.NewVendorCommand(title, command.URIArg{URI: uri})
if err != nil {
return nil, err
}
// Change the message depending on whether or not the module already has a
// vendor directory.
vendorDir := filepath.Join(filepath.Dir(fh.URI().Filename()), "vendor")
if info, _ := os.Stat(vendorDir); info != nil && info.IsDir() {
title = "Sync vendor directory"
}
return []protocol.CodeLens{{Range: rng, Command: &cmd}}, nil
}
func moduleStmtRange(fh source.FileHandle, pm *source.ParsedModule) (protocol.Range, error) {
if pm.File == nil || pm.File.Module == nil || pm.File.Module.Syntax == nil {
return protocol.Range{}, fmt.Errorf("no module statement in %s", fh.URI())
}
syntax := pm.File.Module.Syntax
return pm.Mapper.OffsetRange(syntax.Start.Byte, syntax.End.Byte)
}
// firstRequireRange returns the range for the first "require" in the given
// go.mod file. This is either a require block or an individual require line.
func firstRequireRange(fh source.FileHandle, pm *source.ParsedModule) (protocol.Range, error) {
if len(pm.File.Require) == 0 {
return protocol.Range{}, fmt.Errorf("no requires in the file %s", fh.URI())
}
var start, end modfile.Position
for _, stmt := range pm.File.Syntax.Stmt {
if b, ok := stmt.(*modfile.LineBlock); ok && len(b.Token) == 1 && b.Token[0] == "require" {
start, end = b.Span()
break
}
}
firstRequire := pm.File.Require[0].Syntax
if start.Byte == 0 || firstRequire.Start.Byte < start.Byte {
start, end = firstRequire.Start, firstRequire.End
}
return pm.Mapper.OffsetRange(start.Byte, end.Byte)
}
func vulncheckLenses(ctx context.Context, snapshot source.Snapshot, fh source.FileHandle) ([]protocol.CodeLens, error) {
pm, err := snapshot.ParseMod(ctx, fh)
if err != nil || pm.File == nil {
return nil, err
}
// Place the codelenses near the module statement.
// A module may not have the require block,
// but vulnerabilities can exist in standard libraries.
uri := protocol.URIFromSpanURI(fh.URI())
rng, err := moduleStmtRange(fh, pm)
if err != nil {
return nil, err
}
vulncheck, err := command.NewRunGovulncheckCommand("Run govulncheck", command.VulncheckArgs{
URI: uri,
Pattern: "./...",
})
if err != nil {
return nil, err
}
return []protocol.CodeLens{
{Range: rng, Command: &vulncheck},
}, nil
}
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