aboutsummaryrefslogtreecommitdiffstats
path: root/plumbing/format/packfile/parser_test.go
blob: 6e7c84b14ca588107bca63887d28043c5cd0f071 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
package packfile_test

import (
	"io"
	"testing"

	git "gopkg.in/src-d/go-git.v4"
	"gopkg.in/src-d/go-git.v4/plumbing"
	"gopkg.in/src-d/go-git.v4/plumbing/format/packfile"
	"gopkg.in/src-d/go-git.v4/plumbing/storer"

	. "gopkg.in/check.v1"
	"gopkg.in/src-d/go-git-fixtures.v3"
)

type ParserSuite struct {
	fixtures.Suite
}

var _ = Suite(&ParserSuite{})

func (s *ParserSuite) TestParserHashes(c *C) {
	f := fixtures.Basic().One()
	scanner := packfile.NewScanner(f.Packfile())

	obs := new(testObserver)
	parser, err := packfile.NewParser(scanner, obs)
	c.Assert(err, IsNil)

	ch, err := parser.Parse()
	c.Assert(err, IsNil)

	checksum := "a3fed42da1e8189a077c0e6846c040dcf73fc9dd"
	c.Assert(ch.String(), Equals, checksum)

	c.Assert(obs.checksum, Equals, checksum)
	c.Assert(int(obs.count), Equals, int(31))

	commit := plumbing.CommitObject
	blob := plumbing.BlobObject
	tree := plumbing.TreeObject

	objs := []observerObject{
		{"e8d3ffab552895c19b9fcf7aa264d277cde33881", commit, 254, 12, 0xaa07ba4b},
		{"6ecf0ef2c2dffb796033e5a02219af86ec6584e5", commit, 245, 186, 0xf706df58},
		{"918c48b83bd081e863dbe1b80f8998f058cd8294", commit, 242, 286, 0x12438846},
		{"af2d6a6954d532f8ffb47615169c8fdf9d383a1a", commit, 242, 449, 0x2905a38c},
		{"1669dce138d9b841a518c64b10914d88f5e488ea", commit, 333, 615, 0xd9429436},
		{"a5b8b09e2f8fcb0bb99d3ccb0958157b40890d69", commit, 332, 838, 0xbecfde4e},
		{"35e85108805c84807bc66a02d91535e1e24b38b9", commit, 244, 1063, 0x780e4b3e},
		{"b8e471f58bcbca63b07bda20e428190409c2db47", commit, 243, 1230, 0xdc18344f},
		{"b029517f6300c2da0f4b651b8642506cd6aaf45d", commit, 187, 1392, 0xcf4e4280},
		{"32858aad3c383ed1ff0a0f9bdf231d54a00c9e88", blob, 189, 1524, 0x1f08118a},
		{"d3ff53e0564a9f87d8e84b6e28e5060e517008aa", blob, 18, 1685, 0xafded7b8},
		{"c192bd6a24ea1ab01d78686e417c8bdc7c3d197f", blob, 1072, 1713, 0xcc1428ed},
		{"d5c0f4ab811897cadf03aec358ae60d21f91c50d", blob, 76110, 2351, 0x1631d22f},
		{"880cd14280f4b9b6ed3986d6671f907d7cc2a198", blob, 2780, 78050, 0xbfff5850},
		{"49c6bb89b17060d7b4deacb7b338fcc6ea2352a9", blob, 217848, 78882, 0xd108e1d8},
		{"c8f1d8c61f9da76f4cb49fd86322b6e685dba956", blob, 706, 80725, 0x8e97ba25},
		{"9a48f23120e880dfbe41f7c9b7b708e9ee62a492", blob, 11488, 80998, 0x7316ff70},
		{"9dea2395f5403188298c1dabe8bdafe562c491e3", blob, 78, 84032, 0xdb4fce56},
		{"dbd3641b371024f44d0e469a9c8f5457b0660de1", tree, 272, 84115, 0x901cce2c},
		{"a8d315b2b1c615d43042c3a62402b8a54288cf5c", tree, 271, 84375, 0xec4552b0},
		{"a39771a7651f97faf5c72e08224d857fc35133db", tree, 38, 84430, 0x847905bf},
		{"5a877e6a906a2743ad6e45d99c1793642aaf8eda", tree, 75, 84479, 0x3689459a},
		{"586af567d0bb5e771e49bdd9434f5e0fb76d25fa", tree, 38, 84559, 0xe67af94a},
		{"cf4aa3b38974fb7d81f367c0830f7d78d65ab86b", tree, 34, 84608, 0xc2314a2e},
		{"7e59600739c96546163833214c36459e324bad0a", blob, 9, 84653, 0xcd987848},
		{"fb72698cab7617ac416264415f13224dfd7a165e", tree, 238, 84671, 0x8a853a6d},
		{"4d081c50e250fa32ea8b1313cf8bb7c2ad7627fd", tree, 179, 84688, 0x70c6518},
		{"eba74343e2f15d62adedfd8c883ee0262b5c8021", tree, 148, 84708, 0x4f4108e2},
		{"c2d30fa8ef288618f65f6eed6e168e0d514886f4", tree, 110, 84725, 0xd6fe09e9},
		{"8dcef98b1d52143e1e2dbc458ffe38f925786bf2", tree, 111, 84741, 0xf07a2804},
		{"aa9b383c260e1d05fbbf6b30a02914555e20c725", tree, 73, 84760, 0x1d75d6be},
	}

	c.Assert(obs.objects, DeepEquals, objs)
}

func (s *ParserSuite) TestThinPack(c *C) {

	// Initialize an empty repository
	fs, err := git.PlainInit(c.MkDir(), true)
	c.Assert(err, IsNil)

	// Try to parse a thin pack without having the required objects in the repo to
	// see if the correct errors are returned
	thinpack := fixtures.ByTag("thinpack").One()
	scanner := packfile.NewScanner(thinpack.Packfile())
	parser, err := packfile.NewParserWithStorage(scanner, fs.Storer) // ParserWithStorage writes to the storer all parsed objects!
	c.Assert(err, IsNil)

	_, err = parser.Parse()
	c.Assert(err, Equals, plumbing.ErrObjectNotFound)

	// start over with a clean repo
	fs, err = git.PlainInit(c.MkDir(), true)
	c.Assert(err, IsNil)

	// Now unpack a base packfile into our empty repo:
	f := fixtures.ByURL("https://github.com/spinnaker/spinnaker.git").One()
	w, err := fs.Storer.(storer.PackfileWriter).PackfileWriter()
	c.Assert(err, IsNil)
	_, err = io.Copy(w, f.Packfile())
	c.Assert(err, IsNil)
	w.Close()

	// Check that the test object that will come with our thin pack is *not* in the repo
	_, err = fs.Storer.EncodedObject(plumbing.CommitObject, thinpack.Head)
	c.Assert(err, Equals, plumbing.ErrObjectNotFound)

	// Now unpack the thin pack:
	scanner = packfile.NewScanner(thinpack.Packfile())
	parser, err = packfile.NewParserWithStorage(scanner, fs.Storer) // ParserWithStorage writes to the storer all parsed objects!
	c.Assert(err, IsNil)

	h, err := parser.Parse()
	c.Assert(err, IsNil)
	c.Assert(h, Equals, plumbing.NewHash("1288734cbe0b95892e663221d94b95de1f5d7be8"))

	// Check that our test object is now accessible
	_, err = fs.Storer.EncodedObject(plumbing.CommitObject, thinpack.Head)
	c.Assert(err, IsNil)

}

type observerObject struct {
	hash   string
	otype  plumbing.ObjectType
	size   int64
	offset int64
	crc    uint32
}

type testObserver struct {
	count    uint32
	checksum string
	objects  []observerObject
	pos      map[int64]int
}

func (t *testObserver) OnHeader(count uint32) error {
	t.count = count
	t.pos = make(map[int64]int, count)
	return nil
}

func (t *testObserver) OnInflatedObjectHeader(otype plumbing.ObjectType, objSize int64, pos int64) error {
	o := t.get(pos)
	o.otype = otype
	o.size = objSize
	o.offset = pos

	t.put(pos, o)

	return nil
}

func (t *testObserver) OnInflatedObjectContent(h plumbing.Hash, pos int64, crc uint32, _ []byte) error {
	o := t.get(pos)
	o.hash = h.String()
	o.crc = crc

	t.put(pos, o)

	return nil
}

func (t *testObserver) OnFooter(h plumbing.Hash) error {
	t.checksum = h.String()
	return nil
}

func (t *testObserver) get(pos int64) observerObject {
	i, ok := t.pos[pos]
	if ok {
		return t.objects[i]
	}

	return observerObject{}
}

func (t *testObserver) put(pos int64, o observerObject) {
	i, ok := t.pos[pos]
	if ok {
		t.objects[i] = o
		return
	}

	t.pos[pos] = len(t.objects)
	t.objects = append(t.objects, o)
}

func BenchmarkParse(b *testing.B) {
	if err := fixtures.Init(); err != nil {
		b.Fatal(err)
	}

	defer func() {
		if err := fixtures.Clean(); err != nil {
			b.Fatal(err)
		}
	}()

	for _, f := range fixtures.ByTag("packfile") {
		b.Run(f.URL, func(b *testing.B) {
			for i := 0; i < b.N; i++ {
				parser, err := packfile.NewParser(packfile.NewScanner(f.Packfile()))
				if err != nil {
					b.Fatal(err)
				}

				_, err = parser.Parse()
				if err != nil {
					b.Fatal(err)
				}
			}
		})
	}
}

func BenchmarkParseBasic(b *testing.B) {
	if err := fixtures.Init(); err != nil {
		b.Fatal(err)
	}

	defer func() {
		if err := fixtures.Clean(); err != nil {
			b.Fatal(err)
		}
	}()

	f := fixtures.Basic().One()
	for i := 0; i < b.N; i++ {
		parser, err := packfile.NewParser(packfile.NewScanner(f.Packfile()))
		if err != nil {
			b.Fatal(err)
		}

		_, err = parser.Parse()
		if err != nil {
			b.Fatal(err)
		}
	}
}