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// 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 cmd
import (
"context"
"flag"
"fmt"
"golang.org/x/tools/gopls/internal/span"
)
// check implements the check verb for gopls.
type check struct {
app *Application
}
func (c *check) Name() string { return "check" }
func (c *check) Parent() string { return c.app.Name() }
func (c *check) Usage() string { return "<filename>" }
func (c *check) ShortHelp() string { return "show diagnostic results for the specified file" }
func (c *check) DetailedHelp(f *flag.FlagSet) {
fmt.Fprint(f.Output(), `
Example: show the diagnostic results of this file:
$ gopls check internal/lsp/cmd/check.go
`)
printFlagDefaults(f)
}
// Run performs the check on the files specified by args and prints the
// results to stdout.
func (c *check) Run(ctx context.Context, args ...string) error {
if len(args) == 0 {
// no files, so no results
return nil
}
checking := map[span.URI]*cmdFile{}
var uris []span.URI
// now we ready to kick things off
conn, err := c.app.connect(ctx)
if err != nil {
return err
}
defer conn.terminate(ctx)
for _, arg := range args {
uri := span.URIFromPath(arg)
uris = append(uris, uri)
file := conn.openFile(ctx, uri)
if file.err != nil {
return file.err
}
checking[uri] = file
}
if err := conn.diagnoseFiles(ctx, uris); err != nil {
return err
}
conn.Client.filesMu.Lock()
defer conn.Client.filesMu.Unlock()
for _, file := range checking {
for _, d := range file.diagnostics {
spn, err := file.mapper.RangeSpan(d.Range)
if err != nil {
return fmt.Errorf("Could not convert position %v for %q", d.Range, d.Message)
}
fmt.Printf("%v: %v\n", spn, d.Message)
}
}
return nil
}
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