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package main
import (
"bytes"
"encoding/json"
"os/exec"
"strings"
"github.com/posener/complete"
)
const goListFormat = `'{"name": "{{.Name}}", "dir": "{{.Dir}}"}'`
func predictPackages(packageName string) complete.Predictor {
return complete.PredictFunc(func(a complete.Args) (prediction []string) {
dir := a.Directory()
dir = strings.TrimRight(dir, "/.") + "/..."
pkgs := listPackages(dir)
files := make([]string, 0, len(pkgs))
for _, p := range pkgs {
if packageName != "" && p.Name != packageName {
continue
}
files = append(files, p.Path)
}
return complete.PredictFilesSet(files).Predict(a)
})
}
type pack struct {
Name string
Path string
}
func listPackages(dir string) (pkgs []pack) {
out, err := exec.Command("go", "list", "-f", goListFormat, dir).Output()
if err != nil {
return
}
lines := bytes.Split(out, []byte("\n"))
for _, line := range lines {
var p pack
if err := json.Unmarshal(line, &p); err == nil {
pkgs = append(pkgs, p)
}
}
return
}
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