From a26eca502f195faceb8dbe35a82b1e2e86a0d00a Mon Sep 17 00:00:00 2001
From: Dmitri Shuralyov <shurcooL@gmail.com>
Date: Wed, 12 Nov 2014 12:45:17 -0800
Subject: [PATCH] go.tools/imports: use same logic as 'go' tool for pruning
 package search.

The previous logic would descend into "_"-prefixed names, "testdata" folders,
and skipped folders beginning with a digit.

Fixes golang/go#8958.

LGTM=bradfitz
R=golang-codereviews, dave, bradfitz
CC=golang-codereviews
https://golang.org/cl/167000043
---
 imports/fix.go | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/imports/fix.go b/imports/fix.go
index 11415cfc..6f441aaa 100644
--- a/imports/fix.go
+++ b/imports/fix.go
@@ -239,11 +239,9 @@ func loadPkg(wg *sync.WaitGroup, root, pkgrelpath string) {
 	// then the calls to importPathToName below can be expensive.
 	hasGo := false
 	for _, child := range children {
+		// Avoid .foo, _foo, and testdata directory trees.
 		name := child.Name()
-		if name == "" {
-			continue
-		}
-		if c := name[0]; c == '.' || ('0' <= c && c <= '9') {
+		if name == "" || name[0] == '.' || name[0] == '_' || name == "testdata" {
 			continue
 		}
 		if strings.HasSuffix(name, ".go") {