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// Copyright 2022 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 cmd
import (
"context"
"encoding/json"
"flag"
"fmt"
"os"
"golang.org/x/tools/go/packages"
"golang.org/x/tools/internal/lsp/source"
"golang.org/x/tools/internal/tool"
)
// vulncheck implements the vulncheck command.
type vulncheck struct {
Config bool `flag:"config" help:"If true, the command reads a JSON-encoded package load configuration from stdin"`
app *Application
}
type pkgLoadConfig struct {
// BuildFlags is a list of command-line flags to be passed through to
// the build system's query tool.
BuildFlags []string
// If Tests is set, the loader includes related test packages.
Tests bool
}
// TODO(hyangah): document pkgLoadConfig
func (v *vulncheck) Name() string { return "vulncheck" }
func (v *vulncheck) Parent() string { return v.app.Name() }
func (v *vulncheck) Usage() string { return "" }
func (v *vulncheck) ShortHelp() string {
return "run experimental vulncheck analysis (experimental: under development)"
}
func (v *vulncheck) DetailedHelp(f *flag.FlagSet) {
fmt.Fprint(f.Output(), `
WARNING: this command is experimental.
By default, the command outputs a JSON-encoded
golang.org/x/tools/internal/lsp/command.VulncheckResult
message.
Example:
$ gopls vulncheck <packages>
`)
printFlagDefaults(f)
}
func (v *vulncheck) Run(ctx context.Context, args ...string) error {
if len(args) > 1 {
return tool.CommandLineErrorf("vulncheck accepts at most one package pattern")
}
pattern := "."
if len(args) == 1 {
pattern = args[0]
}
var cfg pkgLoadConfig
if v.Config {
if err := json.NewDecoder(os.Stdin).Decode(&cfg); err != nil {
return tool.CommandLineErrorf("failed to parse cfg: %v", err)
}
}
opts := source.DefaultOptions().Clone()
v.app.options(opts) // register hook
if opts == nil || opts.Hooks.Govulncheck == nil {
return tool.CommandLineErrorf("vulncheck feature is not available")
}
loadCfg := &packages.Config{
Context: ctx,
Tests: cfg.Tests,
BuildFlags: cfg.BuildFlags,
// inherit the current process's cwd and env.
}
res, err := opts.Hooks.Govulncheck(ctx, loadCfg, pattern)
if err != nil {
return tool.CommandLineErrorf("govulncheck failed: %v", err)
}
data, err := json.MarshalIndent(res, " ", " ")
if err != nil {
return tool.CommandLineErrorf("failed to decode results: %v", err)
}
fmt.Printf("%s", data)
return nil
}