// doQuery poses query q to the guru and writes its response and
// error (if any) to out.
func doQuery(out io.Writer, q *query, useJson bool) {
fmt.Fprintf(out, "-------- @%s %s --------\n", q.verb, q.id)
var buildContext = build.Default
buildContext.GOPATH = "testdata"
query := guru.Query{
Mode: q.verb,
Pos: q.queryPos,
Build: &buildContext,
Scope: []string{q.filename},
Reflection: true,
}
if err := guru.Run(&query); err != nil {
fmt.Fprintf(out, "\nError: %s\n", err)
return
}
if useJson {
// JSON output
b, err := json.MarshalIndent(query.Serial(), "", "\t")
if err != nil {
fmt.Fprintf(out, "JSON error: %s\n", err.Error())
return
}
out.Write(b)
fmt.Fprintln(out)
} else {
// "plain" (compiler diagnostic format) output
WriteResult(out, &query)
}
}
// WriteResult writes res (-format=plain) to w, stripping file locations.
func WriteResult(w io.Writer, q *guru.Query) {
capture := new(bytes.Buffer) // capture standard output
q.WriteTo(capture)
for _, line := range strings.Split(capture.String(), "\n") {
// Remove a "file:line: " prefix.
if i := strings.Index(line, ": "); i >= 0 {
line = line[i+2:]
}
fmt.Fprintf(w, "%s\n", line)
}
}