go get: Support for IBM DevOps Services (hub.jazz.net) git repos

LGTM=adg
R=golang-codereviews, adg, minux
CC=golang-codereviews
https://golang.org/cl/106740044

src/cmd/go/doc.go

@@ -681,6 +681,11 @@ A few common code hosting sites have special syntax:
 		import "launchpad.net/~user/project/branch"
 		import "launchpad.net/~user/project/branch/sub/directory"
 
+	IBM DevOps Services (Git)
+
+		import "hub.jazz.net/git/user/project"
+		import "hub.jazz.net/git/user/project/sub/directory"
+
 For code hosted on other servers, import paths may either be qualified
 with the version control type, or the go tool can dynamically fetch
 the import path over https/http and discover where the code resides

src/cmd/go/help.go

@@ -154,6 +154,11 @@ A few common code hosting sites have special syntax:
 		import "launchpad.net/~user/project/branch"
 		import "launchpad.net/~user/project/branch/sub/directory"
 
+	IBM DevOps Services (Git)
+
+		import "hub.jazz.net/git/user/project"
+		import "hub.jazz.net/git/user/project/sub/directory"
+
 For code hosted on other servers, import paths may either be qualified
 with the version control type, or the go tool can dynamically fetch
 the import path over https/http and discover where the code resides

src/cmd/go/vcs.go

@@ -613,6 +613,15 @@ var vcsPaths = []*vcsPath{
 		check:  launchpadVCS,
 	},
 
+	// IBM DevOps Services (JazzHub)
+	{
+		prefix: "hub.jazz.net/git",
+		re:     `^(?P<root>hub.jazz.net/git/[a-z0-9]+/[A-Za-z0-9_.\-]+)(/[A-Za-z0-9_.\-]+)*$`,
+		vcs:    "git",
+		repo:   "https://{root}",
+		check:  noVCSSuffix,
+	},
+
 	// General syntax for any server.
 	{
 		re:   `^(?P<root>(?P<repo>([a-z0-9.\-]+\.)+[a-z0-9.\-]+(:[0-9]+)?/[A-Za-z0-9_.\-/]*?)\.(?P<vcs>bzr|git|hg|svn))(/[A-Za-z0-9_.\-]+)*$`,

src/cmd/go/vcs_test.go

+// Copyright 2014 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"testing"
+)
+
+// Test that RepoRootForImportPath creates the correct RepoRoot for a given importPath.
+// TODO(cmang): Add tests for SVN and BZR.
+func TestRepoRootForImportPath(t *testing.T) {
+	tests := []struct {
+		path string
+		want *repoRoot
+	}{
+		{
+			"code.google.com/p/go",
+			&repoRoot{
+				vcs:  vcsHg,
+				repo: "https://code.google.com/p/go",
+			},
+		},
+		/*{
+		        "code.google.com/r/go",
+		        &repoRoot{
+		                vcs:  vcsHg,
+		                repo: "https://code.google.com/r/go",
+		        },
+		},*/
+		{
+			"github.com/golang/groupcache",
+			&repoRoot{
+				vcs:  vcsGit,
+				repo: "https://github.com/golang/groupcache",
+			},
+		},
+		// IBM DevOps Services tests
+		{
+			"hub.jazz.net/git/user1/pkgname",
+			&repoRoot{
+				vcs:  vcsGit,
+				repo: "https://hub.jazz.net/git/user1/pkgname",
+			},
+		},
+		{
+			"hub.jazz.net/git/user1/pkgname/submodule/submodule/submodule",
+			&repoRoot{
+				vcs:  vcsGit,
+				repo: "https://hub.jazz.net/git/user1/pkgname",
+			},
+		},
+		{
+			"hub.jazz.net",
+			nil,
+		},
+		{
+			"hub2.jazz.net",
+			nil,
+		},
+		{
+			"hub.jazz.net/someotherprefix",
+			nil,
+		},
+		{
+			"hub.jazz.net/someotherprefix/user1/pkgname",
+			nil,
+		},
+		// Spaces are not valid in user names or package names
+		{
+			"hub.jazz.net/git/User 1/pkgname",
+			nil,
+		},
+		{
+			"hub.jazz.net/git/user1/pkg name",
+			nil,
+		},
+		// Dots are not valid in user names
+		{
+			"hub.jazz.net/git/user.1/pkgname",
+			nil,
+		},
+		{
+			"hub.jazz.net/git/user/pkg.name",
+			&repoRoot{
+				vcs:  vcsGit,
+				repo: "https://hub.jazz.net/git/user/pkg.name",
+			},
+		},
+		// User names cannot have uppercase letters
+		{
+			"hub.jazz.net/git/USER/pkgname",
+			nil,
+		},
+	}
+
+	for _, test := range tests {
+		got, err := repoRootForImportPath(test.path)
+		want := test.want
+
+		if want == nil {
+			if err == nil {
+				t.Errorf("RepoRootForImport(%q): Error expected but not received")
+			}
+			continue
+		}
+		if err != nil {
+			t.Errorf("RepoRootForImport(%q): %v", test.path, err)
+			continue
+		}
+		if got.vcs.name != want.vcs.name || got.repo != want.repo {
+			t.Errorf("RepoRootForImport(%q) = VCS(%s) Repo(%s), want VCS(%s) Repo(%s)", test.path, got.vcs, got.repo, want.vcs, want.repo)
+		}
+	}
+}