Merge branch '25-add-gitfame-homework' into 'master'

Resolve "add gitfame homework" Closes #25 See merge request slon/shad-go-private!38
2021-03-01 14:17:25 +00:00 · 2021-03-01 14:17:25 +00:00 · a7e7f4ce52
commit a7e7f4ce52
parent bc6b144341 e074ac385c
67 changed files with 4301 additions and 2 deletions
--- a/gitfame/README.md
+++ b/gitfame/README.md
@ -0,0 +1,166 @@
+## gitfame
+
+В этом задании нужно реализовать консольную утилиту для подсчёта статистик авторов git репозитория.
+
+### Статистики
+
+* Количество строк
+* Количество коммитов
+* Количество файлов
+
+Все статистики считаются для состояния репозитория на момент конкретного коммита.
+
+#### Расчёт
+
+Каждой строке интересующего подмножества файлов репозитория сопоставляется последний коммит, модифицировавший эту строку.
+Пустым файлам сопоставляются последние менявшие их коммиты.
+
+После этого для каждого уникального автора, получившегося множества коммитов,
+считается количество строк, уникальных коммитов и файлов, которые затрагивали коммиты автора.
+
+Нужную информацию можно получить с помощью команды `git blame`:
+
+```
+✗ git blame utf8/README.md
+f4640df4 (Fedor Korotkiy 2020-02-26 20:28:52 +0000 1) # utf8*
+f4640df4 (Fedor Korotkiy 2020-02-26 20:28:52 +0000 2) 
+f4640df4 (Fedor Korotkiy 2020-02-26 20:28:52 +0000 3) Задача объединяет несколько задач на строки и unicode.
+f4640df4 (Fedor Korotkiy 2020-02-26 20:28:52 +0000 4) 
+f4640df4 (Fedor Korotkiy 2020-02-26 20:28:52 +0000 5) Задача считается решённой, если все подзадачи решены.
+```
+
+`git blame` с флагом `--porcelain` (см. `git blame --help`) возвращает информацию в машиночитаемом формате.
+Кроме того, этот формат схлопывает соседние строки относящиеся к одному коммиту,
+что может сильно сократить размер результата. Поэтому использовать нужно его.
+
+### Флаги
+
+Утилита должна поддерживать следующий набор флагов:
+
+**--repository** — путь до Git репозитория; по умолчанию текущая директория
+
+**--revision** — указатель на коммит; HEAD по умолчанию
+
+**--order-by** — ключ сортировки результатов, один из `lines` (дефолт), `commits`, `files`.
+
+По умолчанию результаты сортируются по убыванию ключа `(lines, commits, files)`.
+При равенстве ключей выше будет автор с лексикографически меньшим именем.
+При использовании флага соответствующей поле в ключе перемещается на первое место.
+
+**--use-committer** — булев флаг, заменяющий в расчётах автора (дефолт) на коммиттера
+
+**--format** — формат вывода; один из `tabular` (дефолт), `csv`, `json`, `json-lines`;
+
+`tabular`:
+```
+Name         Lines Commits Files
+Joe Tsai     64    3       2
+Ross Light   2     1       1
+ferhat elmas 1     1       1
+```
+Human-readable формат. Для паддинга используется пробел.
+см. [text/tabwriter](https://golang.org/pkg/text/tabwriter/).
+
+`csv`:
+```
+Name,Lines,Commits,Files
+Joe Tsai,64,3,2
+Ross Light,2,1,1
+ferhat elmas,1,1,1
+```
+
+`json`:
+```
+[{"name":"Joe Tsai","lines":64,"commits":3,"files":2},{"name":"Ross Light","lines":2,"commits":1,"files":1},{"name":"ferhat elmas","lines":1,"commits":1,"files":1}]
+```
+
+`json-lines`:
+```
+{"name":"Joe Tsai","lines":64,"commits":3,"files":2}
+{"name":"Ross Light","lines":2,"commits":1,"files":1}
+{"name":"ferhat elmas","lines":1,"commits":1,"files":1}
+```
+
+**--extensions** — список расширений, сужающий список файлов в расчёте; множество ограничений разделяется запятыми, например, `'.go,.md'`
+
+**--languages** — список языков (программирования, разметки и др.), сужающий список файлов в расчёте; множество ограничений разделяется запятыми например `'go,markdown'`
+
+Принадлежность файла к языку программирования определяется с помощью его расширения.
+В [configs/langauage_extensions.json](configs/language_extensions.json) лежит маппинг.
+Неизвестные языки никаких ограничений не накладывают. При их использовании можно написать warning в stderr.
+
+**--exclude** — набор [Glob](https://en.wikipedia.org/wiki/Glob_(programming)) паттернов, исключающих файлы из расчёта
+
+**--restrict-to** — набор Glob паттернов, исключающий все файлы, не удовлетворяющие ни одному из паттерну из набора
+
+### Тесты
+
+В [/tests/integration/testdata/bundles](test/integration/testdata/bundles) лежат запакованные git репозитории.
+Каждый интеграционный тест ссылается на какой-нибудь бандл.
+
+Как создать bundle? Находясь в git репозитории выполнить
+```
+git bundle create my.bundle --all
+```
+
+Как распаковать bundle? Находясь в пустой директории.
+```
+git clone /path/to/my.bundle .
+```
+
+### Ненавязчивые предложения
+
+#### Project layout
+
+В go есть [набор рекомендаций](https://github.com/golang-standards/project-layout) по организации структуры проекта.
+И подпроект этого задания уже частично ему следует. Например, `main.go`, который вам нужно реализовать, лежит в [cmd/gitfame](./cmd/gitfame),
+интеграционные тесты в `/test`.
+
+В небольших проектах нет ничего плохого в том, чтобы весь код лежал плоско в корне.
+Здесь же, для ознакомления предлагаем изучить общепринятый подход.
+
+#### Cli
+
+Можно познакомиться с [spf13/cobra](https://github.com/spf13/cobra),
+популярной библиотекой для написания [cli](https://en.wikipedia.org/wiki/Command-line_interface).
+В этой задаче cobra поможет распарсить аргументы, написать подробный help message, сделать алиасы для флагов.
+
+### Git ликбез
+
+Вся информация взята из [книги](https://github.com/pluralsight/git-internals-pdf/releases/download/v2.0/peepcode-git.pdf).
+
+Смело советуем прочитать её всем, даже если в контексте задания вы знаете про Git достаточно.
+
+---------
+
+Объекты Git хранятся в специальной базе данных `Git Object Database` в директории .git.
+В базе в сжатом виде хранятся объекты разных типов.
+У каждого объекта есть SHA-1 хэш, а также небольшой header.
+
+Несколько основных типов объектов:
+* **blob** — соответствует файлу; хранит его данные (только содержимое)
+* **tree** — соответствует директории; хранит список блобов и деревьев, а также их описание (имена файлов, типы, права доступа)
+* **commit** — соответствует истории изменения дерева; хранит указатель на дерево, автора изменений, субъекта, добавившего изменения (committer), сообщение с описанием изменений, ссылку на предыдущие (родительские) коммиты
+
+**branch** (ветка) — это не объект `Git Object Database`, а всего лишь файл в директории `.git/refs/heads/` с хэшом последнего для этой ветки коммита.
+То есть ветка — это указатель на коммит.
+
+**head** — это ссылка на коммит. В каждом репозитории по умолчанию есть **head** именем **master**.
+
+**HEAD** — один выделенный **head**. Файл `.git/HEAD`. Родитель следующего коммита.
+
+**HEAD** может ссылаться на коммит напрямую (**detached HEAD**).
+Следующий коммит в таком случае не будет принадлежать никакой ветке.
+
+Гораздо чаще **HEAD** ссылается на ветку.
+В таком случае следующий коммит "попадёт" в ту же ветку и продвинет **HEAD**.
+**HEAD** определяет текущую активную ветку.
+
+**revision** (ревизия) — способ сослаться на Git объект.
+Например, SHA-1 коммита — это ревизия на коммит,
+`HEAD@{5 minutes ago}` — это ревизия на последний коммит на момент 5 минут назад,
+`HEAD:README` — это ревизия на блоб.
+
+### Критерии сдачи
+
+Решение должно проходить все тесты, так же как и в обычной задаче.
--- a/gitfame/cmd/gitfame/main.go
+++ b/gitfame/cmd/gitfame/main.go
@ -0,0 +1,7 @@
+// +build !solution
+
+package main
+
+func main() {
+
+}
--- a/gitfame/configs/language_extensions.json
+++ b/gitfame/configs/language_extensions.json
--- a/gitfame/test/integration/gitfame_test.go
+++ b/gitfame/test/integration/gitfame_test.go
@ -0,0 +1,176 @@
+package integration
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"gopkg.in/yaml.v2"
+
+	"gitlab.com/slon/shad-go/tools/testtool"
+)
+
+const importPath = "gitlab.com/slon/shad-go/gitfame/cmd/gitfame"
+
+var binCache testtool.BinCache
+
+func TestMain(m *testing.M) {
+	os.Exit(func() int {
+		var teardown testtool.CloseFunc
+		binCache, teardown = testtool.NewBinCache()
+		defer teardown()
+
+		return m.Run()
+	}())
+}
+
+func TestGitFame(t *testing.T) {
+	binary, err := binCache.GetBinary(importPath)
+	require.NoError(t, err)
+
+	bundlesDir := path.Join("./testdata", "bundles")
+	testsDir := path.Join("./testdata", "tests")
+	testDirs := ListTestDirs(t, testsDir)
+
+	for _, dir := range testDirs {
+		tc := ReadTestCase(t, filepath.Join(testsDir, dir))
+
+		t.Run(dir+"/"+tc.Name, func(t *testing.T) {
+			dir, err := ioutil.TempDir("", "gitfame-")
+			require.NoError(t, err)
+			defer func() { _ = os.RemoveAll(dir) }()
+
+			args := []string{"--repository", dir}
+			args = append(args, tc.Args...)
+
+			Unbundle(t, filepath.Join(bundlesDir, tc.Bundle), dir)
+
+			cmd := exec.Command(binary, args...)
+			cmd.Stderr = ioutil.Discard
+
+			output, err := cmd.Output()
+			if !tc.Error {
+				require.NoError(t, err)
+				CompareResults(t, tc.Expected, output, tc.Format)
+			} else {
+				require.Error(t, err)
+				_, ok := err.(*exec.ExitError)
+				require.True(t, ok)
+			}
+		})
+	}
+}
+
+func ListTestDirs(t *testing.T, path string) []string {
+	t.Helper()
+
+	files, err := ioutil.ReadDir(path)
+	require.NoError(t, err)
+
+	var names []string
+	for _, f := range files {
+		if !f.IsDir() {
+			continue
+		}
+		names = append(names, f.Name())
+	}
+
+	toInt := func(name string) int {
+		i, err := strconv.Atoi(name)
+		require.NoError(t, err)
+		return i
+	}
+
+	sort.Slice(names, func(i, j int) bool {
+		return toInt(names[i]) < toInt(names[j])
+	})
+
+	return names
+}
+
+type TestCase struct {
+	*TestDescription
+	Expected []byte
+}
+
+func ReadTestCase(t *testing.T, path string) *TestCase {
+	t.Helper()
+
+	desc := ReadTestDescription(t, path)
+
+	expected, err := ioutil.ReadFile(filepath.Join(path, "expected.out"))
+	require.NoError(t, err)
+
+	return &TestCase{TestDescription: desc, Expected: expected}
+}
+
+type TestDescription struct {
+	Name   string   `yaml:"name"`
+	Args   []string `yaml:"args"`
+	Bundle string   `yaml:"bundle"`
+	Error  bool     `yaml:"error"`
+	Format string   `yaml:"format,omitempty"`
+}
+
+func ReadTestDescription(t *testing.T, path string) *TestDescription {
+	t.Helper()
+
+	data, err := ioutil.ReadFile(filepath.Join(path, "description.yaml"))
+	require.NoError(t, err)
+
+	var desc TestDescription
+	require.NoError(t, yaml.Unmarshal(data, &desc))
+
+	return &desc
+}
+
+func Unbundle(t *testing.T, src, dst string) {
+	t.Helper()
+
+	cmd := exec.Command("git", "clone", src, dst)
+	require.NoError(t, cmd.Run())
+}
+
+func CompareResults(t *testing.T, expected, actual []byte, format string) {
+	t.Helper()
+
+	switch format {
+	case "json":
+		if len(expected) == 0 {
+			require.Empty(t, string(actual))
+		} else {
+			require.JSONEq(t, string(expected), string(actual))
+		}
+	case "json-lines":
+		if len(expected) == 0 {
+			require.Empty(t, string(actual))
+		} else {
+			CompareJSONLines(t, expected, actual)
+		}
+	default:
+		require.Equal(t, string(expected), string(actual))
+	}
+}
+
+func CompareJSONLines(t *testing.T, expected, actual []byte) {
+	t.Helper()
+
+	expectedLines := ParseJSONLines(expected)
+	actualLines := ParseJSONLines(actual)
+	require.Equal(t, len(expectedLines), len(actualLines))
+
+	for i, l := range expectedLines {
+		require.JSONEq(t, string(l), string(actualLines[i]))
+	}
+}
+
+func ParseJSONLines(data []byte) [][]byte {
+	return bytes.Split(bytes.TrimSpace(data), []byte("\n"))
+}
--- a/gitfame/test/integration/testdata/bundles/breaker.bundle
+++ b/gitfame/test/integration/testdata/bundles/breaker.bundle
--- a/gitfame/test/integration/testdata/bundles/go-cmp.bundle
+++ b/gitfame/test/integration/testdata/bundles/go-cmp.bundle
--- a/gitfame/test/integration/testdata/bundles/simple.bundle
+++ b/gitfame/test/integration/testdata/bundles/simple.bundle
--- a/gitfame/test/integration/testdata/tests/1/description.yaml
+++ b/gitfame/test/integration/testdata/tests/1/description.yaml
@ -0,0 +1,5 @@
+# Empty .md file, old revision
+
+name: empty file, old revision
+args: [--format, csv, --revision, 49e9ed8b0c32adfa6b30ebe5d94d9d8811ba4d26]
+bundle: simple.bundle
--- a/gitfame/test/integration/testdata/tests/1/expected.out
+++ b/gitfame/test/integration/testdata/tests/1/expected.out
@ -0,0 +1,2 @@
+Name,Lines,Commits,Files
+Russ Cox,0,1,1
--- a/gitfame/test/integration/testdata/tests/10/description.yaml
+++ b/gitfame/test/integration/testdata/tests/10/description.yaml
@ -0,0 +1,5 @@
+# .md with space in name
+
+name: space in filename
+args: [--format, csv, --revision, d5e9958063725c54e82b2e77427bd0dcbaf43fef]
+bundle: breaker.bundle
--- a/gitfame/test/integration/testdata/tests/10/expected.out
+++ b/gitfame/test/integration/testdata/tests/10/expected.out
@ -0,0 +1,2 @@
+Name,Lines,Commits,Files
+Brad Fitzpatrick,4,1,1
--- a/gitfame/test/integration/testdata/tests/11/description.yaml
+++ b/gitfame/test/integration/testdata/tests/11/description.yaml
@ -0,0 +1,5 @@
+# author with tabs in name
+
+name: tabs in author name
+args: [--format, csv, --revision, 400683875aad1234a51d9fe6e8b6137556702ae6, --restrict-to, main.go]
+bundle: breaker.bundle
--- a/gitfame/test/integration/testdata/tests/11/expected.out
+++ b/gitfame/test/integration/testdata/tests/11/expected.out
@ -0,0 +1,2 @@
+Name,Lines,Commits,Files
+My	name	is	Tabby,7,1,1
--- a/gitfame/test/integration/testdata/tests/12/description.yaml
+++ b/gitfame/test/integration/testdata/tests/12/description.yaml
@ -0,0 +1,5 @@
+# author with tabs in name, empty file
+
+name: tabs in author name, empty file
+args: [--format, csv, --revision, 17f8121d7a01af4dd79e2e9cba387f96edc64bd6, --restrict-to, empty.txt]
+bundle: breaker.bundle
--- a/gitfame/test/integration/testdata/tests/12/expected.out
+++ b/gitfame/test/integration/testdata/tests/12/expected.out
@ -0,0 +1,2 @@
+Name,Lines,Commits,Files
+My	name	is	Tabby,0,1,1
--- a/gitfame/test/integration/testdata/tests/13/description.yaml
+++ b/gitfame/test/integration/testdata/tests/13/description.yaml
@ -0,0 +1,5 @@
+# author with name consisting of printable characters, empty commit
+
+name: printable in author name, empty commit
+args: [--format, csv, --revision, 861af9ed3975a7e247547331c2d1e029a8415da0]
+bundle: breaker.bundle
--- a/gitfame/test/integration/testdata/tests/13/expected.out
+++ b/gitfame/test/integration/testdata/tests/13/expected.out
@ -0,0 +1,3 @@
+Name,Lines,Commits,Files
+My	name	is	Tabby,7,2,2
+Brad Fitzpatrick,4,1,1
--- a/gitfame/test/integration/testdata/tests/14/description.yaml
+++ b/gitfame/test/integration/testdata/tests/14/description.yaml
@ -0,0 +1,5 @@
+# author with name consisting of printable characters, empty commit
+
+name: printable in author name, empty commit
+args: [--format, csv, --revision, 68cc2ccd318dce0e86c86c0adc53a9d967e2192c]
+bundle: breaker.bundle
--- a/gitfame/test/integration/testdata/tests/14/expected.out
+++ b/gitfame/test/integration/testdata/tests/14/expected.out
@ -0,0 +1,4 @@
+Name,Lines,Commits,Files
+My	name	is	Tabby,7,2,2
+Brad Fitzpatrick,4,1,1
+"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUV	WXYZ!""#$%&'()*+,-./:;=?@[\]^_`{|}~",0,1,1
--- a/gitfame/test/integration/testdata/tests/15/description.yaml
+++ b/gitfame/test/integration/testdata/tests/15/description.yaml
@ -0,0 +1,5 @@
+# go-cmp, HEAD
+
+name: go-cmp HEAD
+args: [--format, csv]
+bundle: go-cmp.bundle
--- a/gitfame/test/integration/testdata/tests/15/expected.out
+++ b/gitfame/test/integration/testdata/tests/15/expected.out
@ -0,0 +1,17 @@
+Name,Lines,Commits,Files
+Joe Tsai,13818,94,54
+colinnewell,130,1,1
+A. Ishikawa,92,1,2
+Roger Peppe,59,1,2
+Tobias Klauser,35,2,3
+178inaba,27,2,5
+Kyle Lemons,11,1,1
+Dmitri Shuralyov,8,1,2
+ferhat elmas,7,1,4
+Christian Muehlhaeuser,6,3,4
+k.nakada,5,1,3
+LMMilewski,5,1,2
+Ernest Galbrun,3,1,1
+Ross Light,2,1,1
+Chris Morrow,1,1,1
+Fiisio,1,1,1
--- a/gitfame/test/integration/testdata/tests/16/description.yaml
+++ b/gitfame/test/integration/testdata/tests/16/description.yaml
@ -0,0 +1,5 @@
+# go-cmp, HEAD, committer
+
+name: go-cmp HEAD committer
+args: [--format, csv, --use-committer]
+bundle: go-cmp.bundle
--- a/gitfame/test/integration/testdata/tests/16/expected.out
+++ b/gitfame/test/integration/testdata/tests/16/expected.out
@ -0,0 +1,4 @@
+Name,Lines,Commits,Files
+GitHub,11199,100,55
+Joe Tsai,3009,12,29
+Ross Light,2,1,1
--- a/gitfame/test/integration/testdata/tests/17/description.yaml
+++ b/gitfame/test/integration/testdata/tests/17/description.yaml
@ -0,0 +1,5 @@
+# go-cmp, HEAD, order by commits
+
+name: go-cmp HEAD order-by commits
+args: [--format, csv, --order-by, commits]
+bundle: go-cmp.bundle
--- a/gitfame/test/integration/testdata/tests/17/expected.out
+++ b/gitfame/test/integration/testdata/tests/17/expected.out
@ -0,0 +1,17 @@
+Name,Lines,Commits,Files
+Joe Tsai,13818,94,54
+Christian Muehlhaeuser,6,3,4
+Tobias Klauser,35,2,3
+178inaba,27,2,5
+colinnewell,130,1,1
+A. Ishikawa,92,1,2
+Roger Peppe,59,1,2
+Kyle Lemons,11,1,1
+Dmitri Shuralyov,8,1,2
+ferhat elmas,7,1,4
+k.nakada,5,1,3
+LMMilewski,5,1,2
+Ernest Galbrun,3,1,1
+Ross Light,2,1,1
+Chris Morrow,1,1,1
+Fiisio,1,1,1
--- a/gitfame/test/integration/testdata/tests/18/description.yaml
+++ b/gitfame/test/integration/testdata/tests/18/description.yaml
@ -0,0 +1,5 @@
+# go-cmp, HEAD, order by files
+
+name: go-cmp HEAD order-by files
+args: [--format, csv, --order-by, files]
+bundle: go-cmp.bundle
--- a/gitfame/test/integration/testdata/tests/18/expected.out
+++ b/gitfame/test/integration/testdata/tests/18/expected.out
@ -0,0 +1,17 @@
+Name,Lines,Commits,Files
+Joe Tsai,13818,94,54
+178inaba,27,2,5
+ferhat elmas,7,1,4
+Christian Muehlhaeuser,6,3,4
+Tobias Klauser,35,2,3
+k.nakada,5,1,3
+A. Ishikawa,92,1,2
+Roger Peppe,59,1,2
+Dmitri Shuralyov,8,1,2
+LMMilewski,5,1,2
+colinnewell,130,1,1
+Kyle Lemons,11,1,1
+Ernest Galbrun,3,1,1
+Ross Light,2,1,1
+Chris Morrow,1,1,1
+Fiisio,1,1,1
--- a/gitfame/test/integration/testdata/tests/19/description.yaml
+++ b/gitfame/test/integration/testdata/tests/19/description.yaml
@ -0,0 +1,5 @@
+# go-cmp, HEAD, extensions
+
+name: go-cmp HEAD extensions
+args: [--format, csv, --extensions, '.yml,.json,.md']
+bundle: go-cmp.bundle
--- a/gitfame/test/integration/testdata/tests/19/expected.out
+++ b/gitfame/test/integration/testdata/tests/19/expected.out
@ -0,0 +1,5 @@
+Name,Lines,Commits,Files
+Joe Tsai,92,4,3
+Ross Light,2,1,1
+Tobias Klauser,2,1,1
+ferhat elmas,1,1,1
--- a/gitfame/test/integration/testdata/tests/2/description.yaml
+++ b/gitfame/test/integration/testdata/tests/2/description.yaml
@ -0,0 +1,5 @@
+# Empty project
+
+name: empty project
+args: [--format, csv, --revision, dff562439f0406fb00229e3e95a8d2048f265683]
+bundle: simple.bundle
--- a/gitfame/test/integration/testdata/tests/2/expected.out
+++ b/gitfame/test/integration/testdata/tests/2/expected.out
@ -0,0 +1 @@
+Name,Lines,Commits,Files
--- a/gitfame/test/integration/testdata/tests/20/description.yaml
+++ b/gitfame/test/integration/testdata/tests/20/description.yaml
@ -0,0 +1,5 @@
+# go-cmp, HEAD, languages
+
+name: go-cmp HEAD languages
+args: [--format, csv, --languages, 'yaml,c++,markdown,gopher']
+bundle: go-cmp.bundle
--- a/gitfame/test/integration/testdata/tests/20/expected.out
+++ b/gitfame/test/integration/testdata/tests/20/expected.out
@ -0,0 +1,5 @@
+Name,Lines,Commits,Files
+Joe Tsai,92,4,3
+Ross Light,2,1,1
+Tobias Klauser,2,1,1
+ferhat elmas,1,1,1
--- a/gitfame/test/integration/testdata/tests/21/description.yaml
+++ b/gitfame/test/integration/testdata/tests/21/description.yaml
@ -0,0 +1,5 @@
+# go-cmp, HEAD, exclude
+
+name: go-cmp HEAD exclude
+args: [--format, csv, --exclude, 'cmp/cmpopts/*,cmp/internal/testprotos/*,cmp/testdata/*,gopher/*']
+bundle: go-cmp.bundle
--- a/gitfame/test/integration/testdata/tests/21/expected.out
+++ b/gitfame/test/integration/testdata/tests/21/expected.out
@ -0,0 +1,14 @@
+Name,Lines,Commits,Files
+Joe Tsai,10087,90,46
+A. Ishikawa,36,1,1
+178inaba,11,2,4
+Kyle Lemons,11,1,1
+Christian Muehlhaeuser,4,3,3
+Ernest Galbrun,3,1,1
+ferhat elmas,2,1,2
+Dmitri Shuralyov,2,1,1
+Ross Light,2,1,1
+Tobias Klauser,2,1,1
+Chris Morrow,1,1,1
+Fiisio,1,1,1
+LMMilewski,1,1,1
--- a/gitfame/test/integration/testdata/tests/22/description.yaml
+++ b/gitfame/test/integration/testdata/tests/22/description.yaml
@ -0,0 +1,5 @@
+# go-cmp, HEAD, restrict to
+
+name: go-cmp HEAD restrict-to
+args: [--format, csv, --restrict-to, 'cmp/cmpopts/*,cmp/internal/testprotos/*,cmp/testdata/*,gopher/*']
+bundle: go-cmp.bundle
--- a/gitfame/test/integration/testdata/tests/22/expected.out
+++ b/gitfame/test/integration/testdata/tests/22/expected.out
@ -0,0 +1,12 @@
+Name,Lines,Commits,Files
+Joe Tsai,3731,29,8
+colinnewell,130,1,1
+Roger Peppe,59,1,2
+A. Ishikawa,56,1,1
+Tobias Klauser,33,1,2
+178inaba,16,1,1
+Dmitri Shuralyov,6,1,1
+k.nakada,5,1,3
+ferhat elmas,5,1,2
+LMMilewski,4,1,1
+Christian Muehlhaeuser,2,1,1
--- a/gitfame/test/integration/testdata/tests/23/description.yaml
+++ b/gitfame/test/integration/testdata/tests/23/description.yaml
@ -0,0 +1,5 @@
+# go-cmp, HEAD, exclude and restrict to the same dir
+
+name: go-cmp HEAD exclude restrict-to
+args: [--format, csv, --restrict-to, 'cmp/cmpopts/*', --exclude, 'cmp/cmpopts/*']
+bundle: go-cmp.bundle
--- a/gitfame/test/integration/testdata/tests/23/expected.out
+++ b/gitfame/test/integration/testdata/tests/23/expected.out
@ -0,0 +1 @@
+Name,Lines,Commits,Files
--- a/gitfame/test/integration/testdata/tests/24/description.yaml
+++ b/gitfame/test/integration/testdata/tests/24/description.yaml
@ -0,0 +1,6 @@
+# bad format
+
+name: bad format
+args: [--format, yson, --revision, v1.0]
+bundle: simple.bundle
+error: true
--- a/gitfame/test/integration/testdata/tests/24/expected.out
+++ b/gitfame/test/integration/testdata/tests/24/expected.out
--- a/gitfame/test/integration/testdata/tests/25/description.yaml
+++ b/gitfame/test/integration/testdata/tests/25/description.yaml
@ -0,0 +1,6 @@
+# bad sort order
+
+name: bad sort oder
+args: [--order-by, time, --revision, v1.0]
+bundle: simple.bundle
+error: true
--- a/gitfame/test/integration/testdata/tests/25/expected.out
+++ b/gitfame/test/integration/testdata/tests/25/expected.out
--- a/gitfame/test/integration/testdata/tests/26/description.yaml
+++ b/gitfame/test/integration/testdata/tests/26/description.yaml
@ -0,0 +1,6 @@
+# bad revision
+
+name: bad revision
+args: [--revision, head]
+bundle: simple.bundle
+error: true
--- a/gitfame/test/integration/testdata/tests/26/expected.out
+++ b/gitfame/test/integration/testdata/tests/26/expected.out
--- a/gitfame/test/integration/testdata/tests/27/description.yaml
+++ b/gitfame/test/integration/testdata/tests/27/description.yaml
@ -0,0 +1,5 @@
+# go-cmp, HEAD, tabular
+
+name: go-cmp HEAD tabular
+args: []
+bundle: go-cmp.bundle
--- a/gitfame/test/integration/testdata/tests/27/expected.out
+++ b/gitfame/test/integration/testdata/tests/27/expected.out
@ -0,0 +1,17 @@
+Name                   Lines Commits Files
+Joe Tsai               13818 94      54
+colinnewell            130   1       1
+A. Ishikawa            92    1       2
+Roger Peppe            59    1       2
+Tobias Klauser         35    2       3
+178inaba               27    2       5
+Kyle Lemons            11    1       1
+Dmitri Shuralyov       8     1       2
+ferhat elmas           7     1       4
+Christian Muehlhaeuser 6     3       4
+k.nakada               5     1       3
+LMMilewski             5     1       2
+Ernest Galbrun         3     1       1
+Ross Light             2     1       1
+Chris Morrow           1     1       1
+Fiisio                 1     1       1
--- a/gitfame/test/integration/testdata/tests/28/description.yaml
+++ b/gitfame/test/integration/testdata/tests/28/description.yaml
@ -0,0 +1,6 @@
+# go-cmp, HEAD, json
+
+name: go-cmp HEAD json
+args: [--format, json]
+bundle: go-cmp.bundle
+format: json
--- a/gitfame/test/integration/testdata/tests/28/expected.out
+++ b/gitfame/test/integration/testdata/tests/28/expected.out
@ -0,0 +1 @@
+[{"name":"Joe Tsai","lines":13818,"commits":94,"files":54},{"name":"colinnewell","lines":130,"commits":1,"files":1},{"name":"A. Ishikawa","lines":92,"commits":1,"files":2},{"name":"Roger Peppe","lines":59,"commits":1,"files":2},{"name":"Tobias Klauser","lines":35,"commits":2,"files":3},{"name":"178inaba","lines":27,"commits":2,"files":5},{"name":"Kyle Lemons","lines":11,"commits":1,"files":1},{"name":"Dmitri Shuralyov","lines":8,"commits":1,"files":2},{"name":"ferhat elmas","lines":7,"commits":1,"files":4},{"name":"Christian Muehlhaeuser","lines":6,"commits":3,"files":4},{"name":"k.nakada","lines":5,"commits":1,"files":3},{"name":"LMMilewski","lines":5,"commits":1,"files":2},{"name":"Ernest Galbrun","lines":3,"commits":1,"files":1},{"name":"Ross Light","lines":2,"commits":1,"files":1},{"name":"Chris Morrow","lines":1,"commits":1,"files":1},{"name":"Fiisio","lines":1,"commits":1,"files":1}]
--- a/gitfame/test/integration/testdata/tests/29/description.yaml
+++ b/gitfame/test/integration/testdata/tests/29/description.yaml
@ -0,0 +1,6 @@
+# go-cmp, HEAD, json-lines
+
+name: go-cmp HEAD json
+args: [--format, json-lines]
+bundle: go-cmp.bundle
+format: json-lines
--- a/gitfame/test/integration/testdata/tests/29/expected.out
+++ b/gitfame/test/integration/testdata/tests/29/expected.out
@ -0,0 +1,16 @@
+{"name":"Joe Tsai","lines":13818,"commits":94,"files":54}
+{"name":"colinnewell","lines":130,"commits":1,"files":1}
+{"name":"A. Ishikawa","lines":92,"commits":1,"files":2}
+{"name":"Roger Peppe","lines":59,"commits":1,"files":2}
+{"name":"Tobias Klauser","lines":35,"commits":2,"files":3}
+{"name":"178inaba","lines":27,"commits":2,"files":5}
+{"name":"Kyle Lemons","lines":11,"commits":1,"files":1}
+{"name":"Dmitri Shuralyov","lines":8,"commits":1,"files":2}
+{"name":"ferhat elmas","lines":7,"commits":1,"files":4}
+{"name":"Christian Muehlhaeuser","lines":6,"commits":3,"files":4}
+{"name":"k.nakada","lines":5,"commits":1,"files":3}
+{"name":"LMMilewski","lines":5,"commits":1,"files":2}
+{"name":"Ernest Galbrun","lines":3,"commits":1,"files":1}
+{"name":"Ross Light","lines":2,"commits":1,"files":1}
+{"name":"Chris Morrow","lines":1,"commits":1,"files":1}
+{"name":"Fiisio","lines":1,"commits":1,"files":1}
--- a/gitfame/test/integration/testdata/tests/3/description.yaml
+++ b/gitfame/test/integration/testdata/tests/3/description.yaml
@ -0,0 +1,5 @@
+# .md with single line
+
+name: single line
+args: [--format, csv, --revision, a7b4f155866102b0559392440f4217bc3c19bf62]
+bundle: simple.bundle
--- a/gitfame/test/integration/testdata/tests/3/expected.out
+++ b/gitfame/test/integration/testdata/tests/3/expected.out
@ -0,0 +1,2 @@
+Name,Lines,Commits,Files
+Rober Griesemer,1,1,1
--- a/gitfame/test/integration/testdata/tests/4/description.yaml
+++ b/gitfame/test/integration/testdata/tests/4/description.yaml
@ -0,0 +1,5 @@
+# .md with single line, filtered out with --extensions
+
+name: single file, extensions filter
+args: [--format, csv, --revision, a7b4f155866102b0559392440f4217bc3c19bf62, --extensions, .go]
+bundle: simple.bundle
--- a/gitfame/test/integration/testdata/tests/4/expected.out
+++ b/gitfame/test/integration/testdata/tests/4/expected.out
@ -0,0 +1 @@
+Name,Lines,Commits,Files
--- a/gitfame/test/integration/testdata/tests/5/description.yaml
+++ b/gitfame/test/integration/testdata/tests/5/description.yaml
@ -0,0 +1,5 @@
+# .md with single line, filtered out with --languages
+
+name: single file, languages filter
+args: [--format, csv, --revision, a7b4f155866102b0559392440f4217bc3c19bf62, --languages, c++]
+bundle: simple.bundle
--- a/gitfame/test/integration/testdata/tests/5/expected.out
+++ b/gitfame/test/integration/testdata/tests/5/expected.out
@ -0,0 +1 @@
+Name,Lines,Commits,Files
--- a/gitfame/test/integration/testdata/tests/6/description.yaml
+++ b/gitfame/test/integration/testdata/tests/6/description.yaml
@ -0,0 +1,5 @@
+# .md with single line, excluded
+
+name: single file excluded
+args: [--format, csv, --revision, a7b4f155866102b0559392440f4217bc3c19bf62, --exclude, read*]
+bundle: simple.bundle
--- a/gitfame/test/integration/testdata/tests/6/expected.out
+++ b/gitfame/test/integration/testdata/tests/6/expected.out
@ -0,0 +1 @@
+Name,Lines,Commits,Files
--- a/gitfame/test/integration/testdata/tests/7/description.yaml
+++ b/gitfame/test/integration/testdata/tests/7/description.yaml
@ -0,0 +1,5 @@
+# .md + .go x 2
+
+name: HEAD^1
+args: [--format, csv, --revision, HEAD^1]
+bundle: simple.bundle
--- a/gitfame/test/integration/testdata/tests/7/expected.out
+++ b/gitfame/test/integration/testdata/tests/7/expected.out
@ -0,0 +1,3 @@
+Name,Lines,Commits,Files
+Rob Pike,7,3,2
+Brad Fitzpatrick,1,1,1
--- a/gitfame/test/integration/testdata/tests/8/description.yaml
+++ b/gitfame/test/integration/testdata/tests/8/description.yaml
@ -0,0 +1,5 @@
+# .md + .go x 2, tag,
+
+name: tag
+args: [--format, csv, --revision, v1.0]
+bundle: simple.bundle
--- a/gitfame/test/integration/testdata/tests/8/expected.out
+++ b/gitfame/test/integration/testdata/tests/8/expected.out
@ -0,0 +1,3 @@
+Name,Lines,Commits,Files
+Rob Pike,12,4,3
+Brad Fitzpatrick,1,1,1
--- a/gitfame/test/integration/testdata/tests/9/description.yaml
+++ b/gitfame/test/integration/testdata/tests/9/description.yaml
@ -0,0 +1,5 @@
+# .md + .go x 2, tag, --use-committer
+
+name: tag committer
+args: [--format, csv, --revision, v1.0, --use-committer]
+bundle: simple.bundle
--- a/gitfame/test/integration/testdata/tests/9/expected.out
+++ b/gitfame/test/integration/testdata/tests/9/expected.out
@ -0,0 +1,4 @@
+Name,Lines,Commits,Files
+Rob Pike,7,3,2
+Randall77,5,1,1
+Brad Fitzpatrick,1,1,1
--- a/go.mod
+++ b/go.mod
@ -5,6 +5,9 @@ go 1.13
 require (
 	github.com/ClickHouse/clickhouse-go v1.4.0
 	github.com/DATA-DOG/go-sqlmock v1.4.1
+	github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6 // indirect
+	github.com/coreos/go-etcd v2.0.0+incompatible // indirect
+	github.com/cpuguy83/go-md2man v1.0.10 // indirect
 	github.com/go-redis/redis v6.15.7+incompatible
 	github.com/go-resty/resty/v2 v2.1.0
 	github.com/gofrs/uuid v3.2.0+incompatible
@ -16,8 +19,10 @@ require (
 	github.com/jackc/pgx/v4 v4.6.0
 	github.com/jmoiron/sqlx v1.2.0
 	github.com/jonboulle/clockwork v0.1.0
-	github.com/spf13/cobra v0.0.5
+	github.com/spf13/cobra v1.1.3
 	github.com/stretchr/testify v1.5.1
+	github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8 // indirect
+	github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77 // indirect
 	go.uber.org/goleak v1.0.0
 	go.uber.org/zap v1.14.0
 	golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7
@ -25,5 +30,6 @@ require (
 	golang.org/x/sync v0.0.0-20190423024810-112230192c58
 	golang.org/x/sys v0.0.0-20200409092240-59c9f1ba88fa
 	golang.org/x/tools v0.0.0-20200125223703-d33eef8e6825
-	gopkg.in/yaml.v2 v2.2.8
+	gopkg.in/src-d/go-git.v4 v4.13.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0
 )
--- a/go.sum
+++ b/go.sum
@ -1,29 +1,75 @@
 cloud.google.com/go v0.0.0-20170206221025-ce650573d812/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/ClickHouse/clickhouse-go v1.4.0 h1:cC1DEZ1TL74QviZY4svlwow84X5r7/BGd78kf18swhI=
 github.com/ClickHouse/clickhouse-go v1.4.0/go.mod h1:EaI/sW7Azgz9UATzd5ZdZHRUhHgv5+JMS9NSr2smCJI=
 github.com/DATA-DOG/go-sqlmock v1.4.1 h1:ThlnYciV1iM/V0OSF/dtkqWb6xo5qITT1TJBG1MRDJM=
 github.com/DATA-DOG/go-sqlmock v1.4.1/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
 github.com/GoogleCloudPlatform/cloudsql-proxy v0.0.0-20190129172621-c8b1d7a94ddf/go.mod h1:aJ4qN3TfrelA6NZ6AXsXRfmEVaYin3EDbSPJrKS8OXo=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/aclements/go-gg v0.0.0-20170118225347-6dbb4e4fefb0/go.mod h1:55qNq4vcpkIuHowELi5C8e+1yUHtoLoOUR9QU5j7Tes=
 github.com/aclements/go-moremath v0.0.0-20161014184102-0ff62e0875ff/go.mod h1:idZL3yvz4kzx1dsBOAC+oYv6L92P1oFEhUXUB1A/lwQ=
+github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7/go.mod h1:6zEj6s6u/ghQa61ZWa/C2Aw3RkjiTBOix7dkqa1VLIs=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
+github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
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@ -153,9 +299,17 @@ github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJy
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@ -173,59 +327,126 @@ go.uber.org/zap v1.9.1/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
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				`@ -0,0 +1 @@`
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