move: format/packp -> protocol/packp (#141)

* move: format/packp -> protocol/packp

* format/packp -> protocol/packp
* format/packp/pktline -> format/pktline.

* move: protocol/packp/ulreq/* -> protocol/packp/*

* protocol/packp: rename UlReq types to make them unique.

* * protocol/packp: namespace UlReq encoder.

* protocol/packp: namespace UlReq decoder.

* protocol/packp: fix example names

* move: protocol/packp/advrefs/* -> protocol/packp/*

* further ulreq namespacing

* protocol/packp: namespace AdvRefs types.

1 files changed, 257 insertions, 0 deletions

diff --git a/plumbing/protocol/packp/ulreq_encoder_test.go b/plumbing/protocol/packp/ulreq_encoder_test.go
new file mode 100644
index 0000000..fb83653
--- /dev/null
+++ b/plumbing/protocol/packp/ulreq_encoder_test.go
@@ -0,0 +1,257 @@
+package packp
+
+import (
+	"bytes"
+	"time"
+
+	"gopkg.in/src-d/go-git.v4/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing/format/pktline"
+
+	. "gopkg.in/check.v1"
+)
+
+type UlReqEncodeSuite struct{}
+
+var _ = Suite(&UlReqEncodeSuite{})
+
+func testUlReqEncode(c *C, ur *UlReq, expectedPayloads []string) {
+	var buf bytes.Buffer
+	e := NewUlReqEncoder(&buf)
+
+	err := e.Encode(ur)
+	c.Assert(err, IsNil)
+	obtained := buf.Bytes()
+
+	expected := pktlines(c, expectedPayloads...)
+
+	comment := Commentf("\nobtained = %s\nexpected = %s\n", string(obtained), string(expected))
+
+	c.Assert(obtained, DeepEquals, expected, comment)
+}
+
+func testUlReqEncodeError(c *C, ur *UlReq, expectedErrorRegEx string) {
+	var buf bytes.Buffer
+	e := NewUlReqEncoder(&buf)
+
+	err := e.Encode(ur)
+	c.Assert(err, ErrorMatches, expectedErrorRegEx)
+}
+
+func (s *UlReqEncodeSuite) TestZeroValue(c *C) {
+	ur := NewUlReq()
+	expectedErrorRegEx := ".*empty wants.*"
+
+	testUlReqEncodeError(c, ur, expectedErrorRegEx)
+}
+
+func (s *UlReqEncodeSuite) TestOneWant(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}
+
+func (s *UlReqEncodeSuite) TestOneWantWithCapabilities(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+	ur.Capabilities.Add("sysref", "HEAD:/refs/heads/master")
+	ur.Capabilities.Add("multi_ack")
+	ur.Capabilities.Add("thin-pack")
+	ur.Capabilities.Add("side-band")
+	ur.Capabilities.Add("ofs-delta")
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111 multi_ack ofs-delta side-band sysref=HEAD:/refs/heads/master thin-pack\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}
+
+func (s *UlReqEncodeSuite) TestWants(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("4444444444444444444444444444444444444444"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("3333333333333333333333333333333333333333"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("2222222222222222222222222222222222222222"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("5555555555555555555555555555555555555555"))
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111\n",
+		"want 2222222222222222222222222222222222222222\n",
+		"want 3333333333333333333333333333333333333333\n",
+		"want 4444444444444444444444444444444444444444\n",
+		"want 5555555555555555555555555555555555555555\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}
+
+func (s *UlReqEncodeSuite) TestWantsWithCapabilities(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("4444444444444444444444444444444444444444"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("3333333333333333333333333333333333333333"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("2222222222222222222222222222222222222222"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("5555555555555555555555555555555555555555"))
+
+	ur.Capabilities.Add("sysref", "HEAD:/refs/heads/master")
+	ur.Capabilities.Add("multi_ack")
+	ur.Capabilities.Add("thin-pack")
+	ur.Capabilities.Add("side-band")
+	ur.Capabilities.Add("ofs-delta")
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111 multi_ack ofs-delta side-band sysref=HEAD:/refs/heads/master thin-pack\n",
+		"want 2222222222222222222222222222222222222222\n",
+		"want 3333333333333333333333333333333333333333\n",
+		"want 4444444444444444444444444444444444444444\n",
+		"want 5555555555555555555555555555555555555555\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}
+
+func (s *UlReqEncodeSuite) TestShallow(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+	ur.Capabilities.Add("multi_ack")
+	ur.Shallows = append(ur.Shallows, plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"))
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111 multi_ack\n",
+		"shallow aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}
+
+func (s *UlReqEncodeSuite) TestManyShallows(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+	ur.Capabilities.Add("multi_ack")
+	ur.Shallows = append(ur.Shallows, plumbing.NewHash("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"))
+	ur.Shallows = append(ur.Shallows, plumbing.NewHash("dddddddddddddddddddddddddddddddddddddddd"))
+	ur.Shallows = append(ur.Shallows, plumbing.NewHash("cccccccccccccccccccccccccccccccccccccccc"))
+	ur.Shallows = append(ur.Shallows, plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"))
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111 multi_ack\n",
+		"shallow aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n",
+		"shallow bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n",
+		"shallow cccccccccccccccccccccccccccccccccccccccc\n",
+		"shallow dddddddddddddddddddddddddddddddddddddddd\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}
+
+func (s *UlReqEncodeSuite) TestDepthCommits(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+	ur.Depth = DepthCommits(1234)
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111\n",
+		"deepen 1234\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}
+
+func (s *UlReqEncodeSuite) TestDepthSinceUTC(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+	since := time.Date(2015, time.January, 2, 3, 4, 5, 0, time.UTC)
+	ur.Depth = DepthSince(since)
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111\n",
+		"deepen-since 1420167845\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}
+
+func (s *UlReqEncodeSuite) TestDepthSinceNonUTC(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+	berlin, err := time.LoadLocation("Europe/Berlin")
+	c.Assert(err, IsNil)
+	since := time.Date(2015, time.January, 2, 3, 4, 5, 0, berlin)
+	// since value is 2015-01-02 03:04:05 +0100 UTC (Europe/Berlin) or
+	// 2015-01-02 02:04:05 +0000 UTC, which is 1420164245 Unix seconds.
+	ur.Depth = DepthSince(since)
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111\n",
+		"deepen-since 1420164245\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}
+
+func (s *UlReqEncodeSuite) TestDepthReference(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+	ur.Depth = DepthReference("refs/heads/feature-foo")
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111\n",
+		"deepen-not refs/heads/feature-foo\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}
+
+func (s *UlReqEncodeSuite) TestAll(c *C) {
+	ur := NewUlReq()
+	ur.Wants = append(ur.Wants, plumbing.NewHash("4444444444444444444444444444444444444444"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("1111111111111111111111111111111111111111"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("3333333333333333333333333333333333333333"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("2222222222222222222222222222222222222222"))
+	ur.Wants = append(ur.Wants, plumbing.NewHash("5555555555555555555555555555555555555555"))
+
+	ur.Capabilities.Add("sysref", "HEAD:/refs/heads/master")
+	ur.Capabilities.Add("multi_ack")
+	ur.Capabilities.Add("thin-pack")
+	ur.Capabilities.Add("side-band")
+	ur.Capabilities.Add("ofs-delta")
+
+	ur.Shallows = append(ur.Shallows, plumbing.NewHash("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"))
+	ur.Shallows = append(ur.Shallows, plumbing.NewHash("dddddddddddddddddddddddddddddddddddddddd"))
+	ur.Shallows = append(ur.Shallows, plumbing.NewHash("cccccccccccccccccccccccccccccccccccccccc"))
+	ur.Shallows = append(ur.Shallows, plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"))
+
+	since := time.Date(2015, time.January, 2, 3, 4, 5, 0, time.UTC)
+	ur.Depth = DepthSince(since)
+
+	expected := []string{
+		"want 1111111111111111111111111111111111111111 multi_ack ofs-delta side-band sysref=HEAD:/refs/heads/master thin-pack\n",
+		"want 2222222222222222222222222222222222222222\n",
+		"want 3333333333333333333333333333333333333333\n",
+		"want 4444444444444444444444444444444444444444\n",
+		"want 5555555555555555555555555555555555555555\n",
+		"shallow aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n",
+		"shallow bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n",
+		"shallow cccccccccccccccccccccccccccccccccccccccc\n",
+		"shallow dddddddddddddddddddddddddddddddddddddddd\n",
+		"deepen-since 1420167845\n",
+		pktline.FlushString,
+	}
+
+	testUlReqEncode(c, ur, expected)
+}