aboutsummaryrefslogtreecommitdiffstats
path: root/bridge/gitlab/config.go
blob: 1f542d39a6be4e438ace5d4771329043aa96a301 (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
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
package gitlab

import (
	"bufio"
	"fmt"
	"net/url"
	"os"
	"regexp"
	"sort"
	"strconv"
	"strings"
	"time"

	text "github.com/MichaelMure/go-term-text"
	"github.com/pkg/errors"
	"github.com/xanzy/go-gitlab"

	"github.com/MichaelMure/git-bug/bridge/core"
	"github.com/MichaelMure/git-bug/bridge/core/auth"
	"github.com/MichaelMure/git-bug/cache"
	"github.com/MichaelMure/git-bug/entity"
	"github.com/MichaelMure/git-bug/identity"
	"github.com/MichaelMure/git-bug/repository"
	"github.com/MichaelMure/git-bug/util/colors"
)

var (
	ErrBadProjectURL = errors.New("bad project url")
)

func (g *Gitlab) Configure(repo *cache.RepoCache, params core.BridgeParams) (core.Configuration, error) {
	if params.Project != "" {
		fmt.Println("warning: --project is ineffective for a gitlab bridge")
	}
	if params.Owner != "" {
		fmt.Println("warning: --owner is ineffective for a gitlab bridge")
	}

	conf := make(core.Configuration)
	var err error

	if (params.CredPrefix != "" || params.TokenRaw != "") && params.URL == "" {
		return nil, fmt.Errorf("you must provide a project URL to configure this bridge with a token")
	}

	var baseUrl string

	switch {
	case params.BaseURL != "":
		baseUrl = params.BaseURL
	default:
		baseUrl, err = promptBaseUrlOptions()
		if err != nil {
			return nil, errors.Wrap(err, "base url prompt")
		}
	}

	var url string

	// get project url
	switch {
	case params.URL != "":
		url = params.URL
	default:
		// terminal prompt
		url, err = promptURL(repo, baseUrl)
		if err != nil {
			return nil, errors.Wrap(err, "url prompt")
		}
	}

	if !strings.HasPrefix(url, params.BaseURL) {
		return nil, fmt.Errorf("base URL (%s) doesn't match the project URL (%s)", params.BaseURL, url)
	}

	user, err := repo.GetUserIdentity()
	if err != nil && err != identity.ErrNoIdentitySet {
		return nil, err
	}

	// default to a "to be filled" user Id if we don't have a valid one yet
	userId := auth.DefaultUserId
	if user != nil {
		userId = user.Id()
	}

	var cred auth.Credential

	switch {
	case params.CredPrefix != "":
		cred, err = auth.LoadWithPrefix(repo, params.CredPrefix)
		if err != nil {
			return nil, err
		}
		if user != nil && cred.UserId() != user.Id() {
			return nil, fmt.Errorf("selected credential don't match the user")
		}
	case params.TokenRaw != "":
		cred = auth.NewToken(userId, params.TokenRaw, target)
	default:
		cred, err = promptTokenOptions(repo, userId)
		if err != nil {
			return nil, err
		}
	}

	token, ok := cred.(*auth.Token)
	if !ok {
		return nil, fmt.Errorf("the Gitlab bridge only handle token credentials")
	}

	// validate project url and get its ID
	id, err := validateProjectURL(baseUrl, url, token)
	if err != nil {
		return nil, errors.Wrap(err, "project validation")
	}

	conf[core.ConfigKeyTarget] = target
	conf[keyProjectID] = strconv.Itoa(id)
	conf[keyGitlabBaseUrl] = baseUrl

	err = g.ValidateConfig(conf)
	if err != nil {
		return nil, err
	}

	// don't forget to store the now known valid token
	if !auth.IdExist(repo, cred.ID()) {
		err = auth.Store(repo, cred)
		if err != nil {
			return nil, err
		}
	}

	return conf, nil
}

func (g *Gitlab) ValidateConfig(conf core.Configuration) error {
	if v, ok := conf[core.ConfigKeyTarget]; !ok {
		return fmt.Errorf("missing %s key", core.ConfigKeyTarget)
	} else if v != target {
		return fmt.Errorf("unexpected target name: %v", v)
	}
	if _, ok := conf[keyGitlabBaseUrl]; !ok {
		return fmt.Errorf("missing %s key", keyGitlabBaseUrl)
	}
	if _, ok := conf[keyProjectID]; !ok {
		return fmt.Errorf("missing %s key", keyProjectID)
	}

	return nil
}

func promptBaseUrlOptions() (string, error) {
	for {
		fmt.Printf("Gitlab base url:\n")
		fmt.Printf("[0]: https://gitlab.com\n")
		fmt.Printf("[1]: enter your own base url\n")
		fmt.Printf("Select option: ")

		line, err := bufio.NewReader(os.Stdin).ReadString('\n')
		if err != nil {
			return "", err
		}

		line = strings.TrimSpace(line)

		index, err := strconv.Atoi(line)
		if err != nil || index < 0 || index > 1 {
			fmt.Println("invalid input")
			continue
		}

		switch index {
		case 0:
			return defaultBaseURL, nil
		case 1:
			return promptBaseUrl()
		}
	}
}

func promptBaseUrl() (string, error) {
	for {
		fmt.Print("Base url: ")

		line, err := bufio.NewReader(os.Stdin).ReadString('\n')
		if err != nil {
			return "", err
		}

		line = strings.TrimSpace(line)

		ok, err := validateBaseUrl(line)
		if err != nil {
			return "", err
		}
		if ok {
			return line, nil
		}
	}
}

func validateBaseUrl(baseUrl string) (bool, error) {
	u, err := url.Parse(baseUrl)
	if err != nil {
		return false, err
	}
	return u.Scheme != "" && u.Host != "", nil
}

func promptTokenOptions(repo repository.RepoConfig, userId entity.Id) (auth.Credential, error) {
	for {
		creds, err := auth.List(repo, auth.WithUserId(userId), auth.WithTarget(target), auth.WithKind(auth.KindToken))
		if err != nil {
			return nil, err
		}

		// if we don't have existing token, fast-track to the token prompt
		if len(creds) == 0 {
			value, err := promptToken()
			if err != nil {
				return nil, err
			}
			return auth.NewToken(userId, value, target), nil
		}

		fmt.Println()
		fmt.Println("[1]: enter my token")

		fmt.Println()
		fmt.Println("Existing tokens for Gitlab:")

		sort.Sort(auth.ById(creds))
		for i, cred := range creds {
			token := cred.(*auth.Token)
			fmt.Printf("[%d]: %s => %s (%s)\n",
				i+2,
				colors.Cyan(token.ID().Human()),
				colors.Red(text.TruncateMax(token.Value, 10)),
				token.CreateTime().Format(time.RFC822),
			)
		}

		fmt.Println()
		fmt.Print("Select option: ")

		line, err := bufio.NewReader(os.Stdin).ReadString('\n')
		fmt.Println()
		if err != nil {
			return nil, err
		}

		line = strings.TrimSpace(line)
		index, err := strconv.Atoi(line)
		if err != nil || index < 1 || index > len(creds)+1 {
			fmt.Println("invalid input")
			continue
		}

		switch index {
		case 1:
			value, err := promptToken()
			if err != nil {
				return nil, err
			}
			return auth.NewToken(userId, value, target), nil
		default:
			return creds[index-2], nil
		}
	}
}

func promptToken() (string, error) {
	fmt.Println("You can generate a new token by visiting https://gitlab.com/profile/personal_access_tokens.")
	fmt.Println("Choose 'Create personal access token' and set the necessary access scope for your repository.")
	fmt.Println()
	fmt.Println("'api' access scope: to be able to make api calls")
	fmt.Println()

	re, err := regexp.Compile(`^[a-zA-Z0-9\-\_]{20}`)
	if err != nil {
		panic("regexp compile:" + err.Error())
	}

	for {
		fmt.Print("Enter token: ")

		line, err := bufio.NewReader(os.Stdin).ReadString('\n')
		if err != nil {
			return "", err
		}

		token := strings.TrimSpace(line)
		if re.MatchString(token) {
			return token, nil
		}

		fmt.Println("token has incorrect format")
	}
}

func promptURL(repo repository.RepoCommon, baseUrl string) (string, error) {
	// remote suggestions
	remotes, err := repo.GetRemotes()
	if err != nil {
		return "", errors.Wrap(err, "getting remotes")
	}

	validRemotes := getValidGitlabRemoteURLs(baseUrl, remotes)
	if len(validRemotes) > 0 {
		for {
			fmt.Println("\nDetected projects:")

			// print valid remote gitlab urls
			for i, remote := range validRemotes {
				fmt.Printf("[%d]: %v\n", i+1, remote)
			}

			fmt.Printf("\n[0]: Another project\n\n")
			fmt.Printf("Select option: ")

			line, err := bufio.NewReader(os.Stdin).ReadString('\n')
			if err != nil {
				return "", err
			}

			line = strings.TrimSpace(line)

			index, err := strconv.Atoi(line)
			if err != nil || index < 0 || index > len(validRemotes) {
				fmt.Println("invalid input")
				continue
			}

			// if user want to enter another project url break this loop
			if index == 0 {
				break
			}

			return validRemotes[index-1], nil
		}
	}

	// manually enter gitlab url
	for {
		fmt.Print("Gitlab project URL: ")

		line, err := bufio.NewReader(os.Stdin).ReadString('\n')
		if err != nil {
			return "", err
		}

		url := strings.TrimSpace(line)
		if url == "" {
			fmt.Println("URL is empty")
			continue
		}

		return url, nil
	}
}

func getProjectPath(baseUrl, projectUrl string) (string, error) {
	cleanUrl := strings.TrimSuffix(projectUrl, ".git")
	cleanUrl = strings.Replace(cleanUrl, "git@", "https://", 1)
	objectUrl, err := url.Parse(cleanUrl)
	if err != nil {
		return "", ErrBadProjectURL
	}

	objectBaseUrl, err := url.Parse(baseUrl)
	if err != nil {
		return "", ErrBadProjectURL
	}

	if objectUrl.Hostname() != objectBaseUrl.Hostname() {
		return "", fmt.Errorf("base url and project url hostnames doesn't match")
	}
	return objectUrl.Path[1:], nil
}

func getValidGitlabRemoteURLs(baseUrl string, remotes map[string]string) []string {
	urls := make([]string, 0, len(remotes))
	for _, u := range remotes {
		path, err := getProjectPath(baseUrl, u)
		if err != nil {
			continue
		}

		urls = append(urls, fmt.Sprintf("%s/%s", baseUrl, path))
	}

	return urls
}

func validateProjectURL(baseUrl, url string, token *auth.Token) (int, error) {
	projectPath, err := getProjectPath(baseUrl, url)
	if err != nil {
		return 0, err
	}

	client, err := buildClient(baseUrl, token)
	if err != nil {
		return 0, err
	}

	project, _, err := client.Projects.GetProject(projectPath, &gitlab.GetProjectOptions{})
	if err != nil {
		return 0, errors.Wrap(err, "wrong token scope ou inexistent project")
	}

	return project.ID, nil
}