1package config
2
3import (
4 "bytes"
5 "errors"
6 "io/fs"
7 "log"
8 "path/filepath"
9 "strings"
10 "sync"
11 "text/template"
12 "time"
13
14 "golang.org/x/crypto/ssh"
15 "gopkg.in/yaml.v3"
16
17 "fmt"
18 "os"
19
20 "github.com/charmbracelet/soft-serve/server/config"
21 "github.com/go-git/go-billy/v5/memfs"
22 ggit "github.com/go-git/go-git/v5"
23 "github.com/go-git/go-git/v5/plumbing/object"
24 "github.com/go-git/go-git/v5/plumbing/transport"
25 "github.com/go-git/go-git/v5/storage/memory"
26)
27
28// Config is the Soft Serve configuration.
29type Config struct {
30 Name string `yaml:"name"`
31 Host string `yaml:"host"`
32 Port int `yaml:"port"`
33 AnonAccess string `yaml:"anon-access"`
34 AllowKeyless bool `yaml:"allow-keyless"`
35 Users []User `yaml:"users"`
36 Repos []MenuRepo `yaml:"repos"`
37 Source *RepoSource `yaml:"-"`
38 Cfg *config.Config `yaml:"-"`
39 mtx sync.Mutex
40}
41
42// User contains user-level configuration for a repository.
43type User struct {
44 Name string `yaml:"name"`
45 Admin bool `yaml:"admin"`
46 PublicKeys []string `yaml:"public-keys"`
47 CollabRepos []string `yaml:"collab-repos"`
48}
49
50// Repo contains repository configuration information.
51type MenuRepo struct {
52 Name string `yaml:"name"`
53 Repo string `yaml:"repo"`
54 Note string `yaml:"note"`
55 Private bool `yaml:"private"`
56 Readme string `yaml:"readme"`
57}
58
59// NewConfig creates a new internal Config struct.
60func NewConfig(cfg *config.Config) (*Config, error) {
61 var anonAccess string
62 var yamlUsers string
63 var displayHost string
64 host := cfg.Host
65 port := cfg.Port
66
67 pks := make([]string, 0)
68 for _, k := range cfg.InitialAdminKeys {
69 if bts, err := os.ReadFile(k); err == nil {
70 // pk is a file, set its contents as pk
71 k = string(bts)
72 }
73 var pk = strings.TrimSpace(k)
74 if pk == "" {
75 continue
76 }
77 // it is a valid ssh key, nothing to do
78 if _, _, _, _, err := ssh.ParseAuthorizedKey([]byte(pk)); err != nil {
79 return nil, fmt.Errorf("invalid initial admin key %q: %w", k, err)
80 }
81 pks = append(pks, pk)
82 }
83
84 rs := NewRepoSource(cfg.RepoPath)
85 c := &Config{
86 Cfg: cfg,
87 }
88 c.Host = cfg.Host
89 c.Port = port
90 c.Source = rs
91 if len(pks) == 0 {
92 anonAccess = "read-write"
93 } else {
94 anonAccess = "no-access"
95 }
96 if host == "" {
97 displayHost = "localhost"
98 } else {
99 displayHost = host
100 }
101 yamlConfig := fmt.Sprintf(defaultConfig,
102 displayHost,
103 port,
104 anonAccess,
105 len(pks) == 0,
106 )
107 if len(pks) == 0 {
108 yamlUsers = defaultUserConfig
109 } else {
110 var result string
111 for _, pk := range pks {
112 result += fmt.Sprintf(" - %s\n", pk)
113 }
114 yamlUsers = fmt.Sprintf(hasKeyUserConfig, result)
115 }
116 yaml := fmt.Sprintf("%s%s%s", yamlConfig, yamlUsers, exampleUserConfig)
117 err := c.createDefaultConfigRepo(yaml)
118 if err != nil {
119 return nil, err
120 }
121 return c, nil
122}
123
124// Reload reloads the configuration.
125func (cfg *Config) Reload() error {
126 cfg.mtx.Lock()
127 defer cfg.mtx.Unlock()
128 err := cfg.Source.LoadRepos()
129 if err != nil {
130 return err
131 }
132 cr, err := cfg.Source.GetRepo("config")
133 if err != nil {
134 return err
135 }
136 cs, _, err := cr.LatestFile("config.yaml")
137 if err != nil {
138 return err
139 }
140 err = yaml.Unmarshal([]byte(cs), cfg)
141 if err != nil {
142 return fmt.Errorf("bad yaml in config.yaml: %s", err)
143 }
144 for _, r := range cfg.Source.AllRepos() {
145 name := r.Name()
146 err = r.UpdateServerInfo()
147 if err != nil {
148 log.Printf("error updating server info for %s: %s", name, err)
149 }
150 pat := "README*"
151 rp := ""
152 for _, rr := range cfg.Repos {
153 if name == rr.Repo {
154 rp = rr.Readme
155 r.name = rr.Name
156 r.description = rr.Note
157 break
158 }
159 }
160 if rp != "" {
161 pat = rp
162 }
163 rm := ""
164 fc, fp, _ := r.LatestFile(pat)
165 rm = fc
166 if name == "config" {
167 md, err := templatize(rm, cfg)
168 if err != nil {
169 return err
170 }
171 rm = md
172 }
173 r.SetReadme(rm, fp)
174 }
175 return nil
176}
177
178func createFile(path string, content string) error {
179 f, err := os.Create(path)
180 if err != nil {
181 return err
182 }
183 defer f.Close()
184 _, err = f.WriteString(content)
185 if err != nil {
186 return err
187 }
188 return f.Sync()
189}
190
191func (cfg *Config) createDefaultConfigRepo(yaml string) error {
192 cn := "config"
193 rp := filepath.Join(cfg.Cfg.RepoPath, cn)
194 rs := cfg.Source
195 err := rs.LoadRepo(cn)
196 if errors.Is(err, fs.ErrNotExist) {
197 repo, err := ggit.PlainInit(rp, true)
198 if err != nil {
199 return err
200 }
201 repo, err = ggit.Clone(memory.NewStorage(), memfs.New(), &ggit.CloneOptions{
202 URL: rp,
203 })
204 if err != nil && err != transport.ErrEmptyRemoteRepository {
205 return err
206 }
207 wt, err := repo.Worktree()
208 if err != nil {
209 return err
210 }
211 rm, err := wt.Filesystem.Create("README.md")
212 if err != nil {
213 return err
214 }
215 _, err = rm.Write([]byte(defaultReadme))
216 if err != nil {
217 return err
218 }
219 _, err = wt.Add("README.md")
220 if err != nil {
221 return err
222 }
223 cf, err := wt.Filesystem.Create("config.yaml")
224 if err != nil {
225 return err
226 }
227 _, err = cf.Write([]byte(yaml))
228 if err != nil {
229 return err
230 }
231 _, err = wt.Add("config.yaml")
232 if err != nil {
233 return err
234 }
235 author := &object.Signature{
236 Name: "Soft Serve Server",
237 Email: "vt100@charm.sh",
238 When: time.Now(),
239 }
240 _, err = wt.Commit("Default init", &ggit.CommitOptions{
241 All: true,
242 Author: author,
243 })
244 if err != nil {
245 return err
246 }
247 err = repo.Push(&ggit.PushOptions{})
248 if err != nil {
249 return err
250 }
251 } else if err != nil {
252 return err
253 }
254 return cfg.Reload()
255}
256
257func (cfg *Config) isPrivate(repo string) bool {
258 for _, r := range cfg.Repos {
259 if r.Repo == repo {
260 return r.Private
261 }
262 }
263 return false
264}
265
266func templatize(mdt string, tmpl interface{}) (string, error) {
267 t, err := template.New("readme").Parse(mdt)
268 if err != nil {
269 return "", err
270 }
271 buf := &bytes.Buffer{}
272 err = t.Execute(buf, tmpl)
273 if err != nil {
274 return "", err
275 }
276 return buf.String(), nil
277}