tree c05014c2559044c37df5be381e8bbc84763bc9a1
parent 12a7c317e894c0a622b5ed27f0a102fcdd56d1ad
author Heschi Kreinick <heschi@google.com> 1537222066 -0400
committer Heschi Kreinick <heschi@google.com> 1539366836 +0000

imports: refactor directory walking

We plan to reuse goimports' directory walking logic in the
implementation of go/packages. To prepare for that, refactor it to have
fewer global variables and a simpler interface.

This CL makes no functional changes, but may change performance
slightly. It always scans both $GOPATH and $GOROOT, and does so
serially. I expect that fastwalk's internal parallelism is enough to
keep the disk busy, and I don't think it's worth optimizing for people
hacking on Go itself.

Change-Id: Id797e1b8e31d52e2eae07b42761ac136689cec32
Reviewed-on: https://go-review.googlesource.com/c/135678
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>