aboutsummaryrefslogtreecommitdiffstats
path: root/bridge/gitlab/config.go
blob: a375bab2eea039a36aac56b48ff3632d1563908b (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
package gitlab

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

	"github.com/pkg/errors"
	"github.com/xanzy/go-gitlab"

	"github.com/MichaelMure/git-bug/bridge/core"
	"github.com/MichaelMure/git-bug/repository"
)

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

func (*Gitlab) Configure(repo repository.RepoCommon, 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
	var url string
	var token string

	// get project url
	if params.URL != "" {
		url = params.URL

	} else {
		// remote suggestions
		remotes, err := repo.GetRemotes()
		if err != nil {
			return nil, errors.Wrap(err, "getting remotes")
		}

		// terminal prompt
		url, err = promptURL(remotes)
		if err != nil {
			return nil, errors.Wrap(err, "url prompt")
		}
	}

	// get user token
	if params.Token != "" {
		token = params.Token
	} else {
		token, err = promptToken()
		if err != nil {
			return nil, errors.Wrap(err, "token prompt")
		}
	}

	var ok bool
	// validate project url and get it ID
	ok, id, err := validateProjectURL(url, token)
	if err != nil {
		return nil, errors.Wrap(err, "project validation")
	}
	if !ok {
		return nil, fmt.Errorf("invalid project id or wrong token scope")
	}

	conf[keyProjectID] = strconv.Itoa(id)
	conf[keyToken] = token
	conf[keyTarget] = target

	return conf, nil
}

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

	if _, ok := conf[keyToken]; !ok {
		return fmt.Errorf("missing %s key", keyToken)
	}

	if _, ok := conf[keyProjectID]; !ok {
		return fmt.Errorf("missing %s key", keyProjectID)
	}

	return 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.TrimRight(line, "\n")
		if re.MatchString(token) {
			return token, nil
		}

		fmt.Println("token is invalid")
	}
}

func promptURL(remotes map[string]string) (string, error) {
	validRemotes := getValidGitlabRemoteURLs(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.TrimRight(line, "\n")

			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.TrimRight(line, "\n")
		if line == "" {
			fmt.Println("URL is empty")
			continue
		}

		return url, nil
	}
}

func getProjectPath(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
	}

	return objectUrl.Path[1:], nil
}

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

		urls = append(urls, fmt.Sprintf("%s%s", "gitlab.com", path))
	}

	return urls
}

func validateProjectURL(url, token string) (bool, int, error) {
	client := buildClient(token)

	projectPath, err := getProjectPath(url)
	if err != nil {
		return false, 0, err
	}

	project, _, err := client.Projects.GetProject(projectPath, &gitlab.GetProjectOptions{})
	if err != nil {
		return false, 0, err
	}

	return true, project.ID, nil
}