1 files changed, 50 insertions, 0 deletions
diff --git a/gocomplete/pkgs.go b/gocomplete/pkgs.go
new file mode 100644
index 0000000..b223ea9
--- /dev/null
+++ b/gocomplete/pkgs.go
@@ -0,0 +1,50 @@
+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
+}