From: Meng Zhuo <mengzhuo1203@gmail.com>
Date: Tue, 27 Oct 2015 07:36:38 +0000 (+0800)
Subject: cmd/go: use shallow clones for new git checkouts
X-Git-Tag: go1.6beta1~558
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=bc1f9d20b40998b87c9a5f56f2b22595de65c2d4;p=gostls13.git

cmd/go: use shallow clones for new git checkouts

Currently go get will clone the full history of git repos.
We can improve the download waiting time/size by passing depth argument.

The docs about shallow clones and the --depth argument are here:
https://git-scm.com/docs/git-clone
https://git-scm.com/docs/git-pull

Fixes #13078

Change-Id: Ie891d905d9c77f6ecadf7dcd5b44b477f4e079e0
Reviewed-on: https://go-review.googlesource.com/16360
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
---

diff --git a/src/cmd/go/vcs.go b/src/cmd/go/vcs.go
index a1100960bf..6305175fd1 100644
--- a/src/cmd/go/vcs.go
+++ b/src/cmd/go/vcs.go
@@ -122,8 +122,8 @@ var vcsGit = &vcsCmd{
 	name: "Git",
 	cmd:  "git",
 
-	createCmd:   []string{"clone {repo} {dir}", "--git-dir={dir}/.git submodule update --init --recursive"},
-	downloadCmd: []string{"pull --ff-only", "submodule update --init --recursive"},
+	createCmd:   []string{"clone --depth=1 {repo} {dir}", "--git-dir={dir}/.git submodule update --init --recursive"},
+	downloadCmd: []string{"pull --depth=1 --ff-only", "submodule update --init --recursive"},
 
 	tagCmd: []tagCmd{
 		// tags/xxx matches a git tag named xxx