16 "github.com/blang/semver"
17 "github.com/yosuke-furukawa/json5/encoding/json5"
18 "github.com/yuin/gopher-lua"
22 pluginChannels PluginChannels = PluginChannels{
23 PluginChannel("https://www.boombuler.de/channel.json"),
26 allPluginPackages PluginPackages = nil
29 // CorePluginName is a plugin dependency name for the micro core.
30 const CorePluginName = "micro"
32 // PluginChannel contains an url to a json list of PluginRepository
33 type PluginChannel string
35 // PluginChannels is a slice of PluginChannel
36 type PluginChannels []PluginChannel
38 // PluginRepository contains an url to json file containing PluginPackages
39 type PluginRepository string
41 // PluginPackage contains the meta-data of a plugin and all available versions
42 type PluginPackage struct {
47 Versions PluginVersions
50 // PluginPackages is a list of PluginPackage instances.
51 type PluginPackages []*PluginPackage
53 // PluginVersion descripes a version of a PluginPackage. Containing a version, download url and also dependencies.
54 type PluginVersion struct {
56 Version semver.Version
58 Require PluginDependencies
61 // PluginVersions is a slice of PluginVersion
62 type PluginVersions []*PluginVersion
64 // PluginDenendency descripes a dependency to another plugin or micro itself.
65 type PluginDependency struct {
70 // PluginDependencies is a slice of PluginDependency
71 type PluginDependencies []*PluginDependency
73 func (pp *PluginPackage) String() string {
74 buf := new(bytes.Buffer)
75 buf.WriteString("Plugin: ")
76 buf.WriteString(pp.Name)
79 buf.WriteString("Author: ")
80 buf.WriteString(pp.Author)
83 if pp.Description != "" {
85 buf.WriteString(pp.Description)
90 func fetchAllSources(count int, fetcher func(i int) PluginPackages) PluginPackages {
91 wgQuery := new(sync.WaitGroup)
94 results := make(chan PluginPackages)
96 wgDone := new(sync.WaitGroup)
98 var packages PluginPackages
99 for i := 0; i < count; i++ {
101 results <- fetcher(i)
106 packages = make(PluginPackages, 0)
107 for res := range results {
108 packages = append(packages, res...)
118 // Fetch retrieves all available PluginPackages from the given channels
119 func (pc PluginChannels) Fetch() PluginPackages {
120 return fetchAllSources(len(pc), func(i int) PluginPackages {
125 // Fetch retrieves all available PluginPackages from the given channel
126 func (pc PluginChannel) Fetch() PluginPackages {
127 messenger.AddLog(fmt.Sprintf("Fetching channel: %q", string(pc)))
128 resp, err := http.Get(string(pc))
130 TermMessage("Failed to query plugin channel:\n", err)
131 return PluginPackages{}
133 defer resp.Body.Close()
134 decoder := json5.NewDecoder(resp.Body)
136 var repositories []PluginRepository
137 if err := decoder.Decode(&repositories); err != nil {
138 TermMessage("Failed to decode channel data:\n", err)
139 return PluginPackages{}
141 return fetchAllSources(len(repositories), func(i int) PluginPackages {
142 return repositories[i].Fetch()
146 // Fetch retrieves all available PluginPackages from the given repository
147 func (pr PluginRepository) Fetch() PluginPackages {
148 messenger.AddLog(fmt.Sprintf("Fetching repository: %q", string(pr)))
149 resp, err := http.Get(string(pr))
151 TermMessage("Failed to query plugin repository:\n", err)
152 return PluginPackages{}
154 defer resp.Body.Close()
155 decoder := json5.NewDecoder(resp.Body)
157 var plugins PluginPackages
158 if err := decoder.Decode(&plugins); err != nil {
159 TermMessage("Failed to decode repository data:\n", err)
160 return PluginPackages{}
165 // UnmarshalJSON unmarshals raw json to a PluginVersion
166 func (pv *PluginVersion) UnmarshalJSON(data []byte) error {
168 Version semver.Version
170 Require map[string]string
173 if err := json5.Unmarshal(data, &values); err != nil {
176 pv.Version = values.Version
178 pv.Require = make(PluginDependencies, 0)
180 for k, v := range values.Require {
181 if vRange, err := semver.ParseRange(v); err == nil {
182 pv.Require = append(pv.Require, &PluginDependency{k, vRange})
188 // UnmarshalJSON unmarshals raw json to a PluginPackage
189 func (pp *PluginPackage) UnmarshalJSON(data []byte) error {
195 Versions PluginVersions
197 if err := json5.Unmarshal(data, &values); err != nil {
200 pp.Name = values.Name
201 pp.Description = values.Description
202 pp.Author = values.Author
203 pp.Tags = values.Tags
204 pp.Versions = values.Versions
205 for _, v := range pp.Versions {
211 // GetAllPluginPackages gets all PluginPackages which may be available.
212 func GetAllPluginPackages() PluginPackages {
213 if allPluginPackages == nil {
214 allPluginPackages = pluginChannels.Fetch()
216 return allPluginPackages
219 func (pv PluginVersions) find(ppName string) *PluginVersion {
220 for _, v := range pv {
221 if v.pack.Name == ppName {
228 // Len returns the number of pluginversions in this slice
229 func (pv PluginVersions) Len() int {
233 // Swap two entries of the slice
234 func (pv PluginVersions) Swap(i, j int) {
235 pv[i], pv[j] = pv[j], pv[i]
238 // Less returns true if the version at position i is greater then the version at position j (used for sorting)
239 func (s PluginVersions) Less(i, j int) bool {
240 return s[i].Version.GT(s[j].Version)
243 // Match returns true if the package matches a given search text
244 func (pp PluginPackage) Match(text string) bool {
245 text = strings.ToLower(text)
246 for _, t := range pp.Tags {
247 if strings.ToLower(t) == text {
251 if strings.Contains(strings.ToLower(pp.Name), text) {
255 if strings.Contains(strings.ToLower(pp.Description), text) {
262 // IsInstallable returns true if the package can be installed.
263 func (pp PluginPackage) IsInstallable() bool {
264 _, err := GetAllPluginPackages().Resolve(GetInstalledVersions(), PluginDependencies{
267 Range: semver.Range(func(v semver.Version) bool { return true }),
272 // SearchPlugin retrieves a list of all PluginPackages which match the given search text and
273 // could be or are already installed
274 func SearchPlugin(texts []string) (plugins PluginPackages) {
275 plugins = make(PluginPackages, 0)
278 for _, pp := range GetAllPluginPackages() {
279 for _, text := range texts {
285 if pp.IsInstallable() {
286 plugins = append(plugins, pp)
292 func newStaticPluginVersion(name, version string) *PluginVersion {
293 vers, err := semver.ParseTolerant(version)
296 if vers, err = semver.ParseTolerant("0.0.0-" + version); err != nil {
297 vers = semver.MustParse("0.0.0-unknown")
300 pl := &PluginPackage{
303 pv := &PluginVersion{
307 pl.Versions = PluginVersions{pv}
311 // GetInstalledVersions returns a list of all currently installed plugins including an entry for
312 // micro itself. This can be used to resolve dependencies.
313 func GetInstalledVersions() PluginVersions {
314 result := PluginVersions{
315 newStaticPluginVersion(CorePluginName, Version),
318 for _, name := range loadedPlugins {
319 version := GetInstalledPluginVersion(name)
320 if pv := newStaticPluginVersion(name, version); pv != nil {
321 result = append(result, pv)
328 // GetInstalledPluginVersion returns the string of the exported VERSION variable of a loaded plugin
329 func GetInstalledPluginVersion(name string) string {
330 plugin := L.GetGlobal(name)
331 if plugin != lua.LNil {
332 version := L.GetField(plugin, "VERSION")
333 if str, ok := version.(lua.LString); ok {
341 func (pv *PluginVersion) DownloadAndInstall() error {
342 messenger.AddLog(fmt.Sprintf("Downloading %q (%s) from %q", pv.pack.Name, pv.Version, pv.Url))
343 resp, err := http.Get(pv.Url)
347 defer resp.Body.Close()
348 data, err := ioutil.ReadAll(resp.Body)
352 zipbuf := bytes.NewReader(data)
353 z, err := zip.NewReader(zipbuf, zipbuf.Size())
357 targetDir := filepath.Join(configDir, "plugins", pv.pack.Name)
358 dirPerm := os.FileMode(0755)
359 if err = os.MkdirAll(targetDir, dirPerm); err != nil {
362 for _, f := range z.File {
363 targetName := filepath.Join(targetDir, filepath.Join(strings.Split(f.Name, "/")...))
364 if f.FileInfo().IsDir() {
365 if err := os.MkdirAll(targetName, dirPerm); err != nil {
369 content, err := f.Open()
373 defer content.Close()
374 if target, err := os.Create(targetName); err != nil {
378 if _, err = io.Copy(target, content); err != nil {
387 func (pl PluginPackages) Get(name string) *PluginPackage {
388 for _, p := range pl {
396 func (pl PluginPackages) GetAllVersions(name string) PluginVersions {
397 result := make(PluginVersions, 0)
400 for _, v := range p.Versions {
401 result = append(result, v)
407 func (req PluginDependencies) Join(other PluginDependencies) PluginDependencies {
408 m := make(map[string]*PluginDependency)
409 for _, r := range req {
412 for _, o := range other {
415 m[o.Name] = &PluginDependency{
417 o.Range.AND(cur.Range),
423 result := make(PluginDependencies, 0, len(m))
424 for _, v := range m {
425 result = append(result, v)
430 func (all PluginPackages) Resolve(selectedVersions PluginVersions, open PluginDependencies) (PluginVersions, error) {
432 return selectedVersions, nil
434 currentRequirement, stillOpen := open[0], open[1:]
435 if currentRequirement != nil {
436 if selVersion := selectedVersions.find(currentRequirement.Name); selVersion != nil {
437 if currentRequirement.Range(selVersion.Version) {
438 return all.Resolve(selectedVersions, stillOpen)
440 return nil, fmt.Errorf("unable to find a matching version for \"%s\"", currentRequirement.Name)
442 availableVersions := all.GetAllVersions(currentRequirement.Name)
443 sort.Sort(availableVersions)
445 for _, version := range availableVersions {
446 if currentRequirement.Range(version.Version) {
447 resolved, err := all.Resolve(append(selectedVersions, version), stillOpen.Join(version.Require))
454 return nil, fmt.Errorf("unable to find a matching version for \"%s\"", currentRequirement.Name)
457 return selectedVersions, nil
461 func (versions PluginVersions) install() {
462 anyInstalled := false
463 currentlyInstalled := GetInstalledVersions()
465 for _, sel := range versions {
466 if sel.pack.Name != CorePluginName {
467 shouldInstall := true
468 if pv := currentlyInstalled.find(sel.pack.Name); pv != nil {
469 if pv.Version.NE(sel.Version) {
470 messenger.AddLog(fmt.Sprint("Uninstalling %q", sel.pack.Name))
471 UninstallPlugin(sel.pack.Name)
473 shouldInstall = false
478 if err := sel.DownloadAndInstall(); err != nil {
487 messenger.Message("One or more plugins installed. Please restart micro.")
489 messenger.AddLog("Nothing to install / update")
493 // UninstallPlugin deletes the plugin folder of the given plugin
494 func UninstallPlugin(name string) {
495 if err := os.RemoveAll(filepath.Join(configDir, "plugins", name)); err != nil {
500 func (pl PluginPackage) Install() {
501 selected, err := GetAllPluginPackages().Resolve(GetInstalledVersions(), PluginDependencies{
504 Range: semver.Range(func(v semver.Version) bool { return true }),
513 func UpdatePlugins(plugins []string) {
514 // if no plugins are specified, update all installed plugins.
515 if len(plugins) == 0 {
516 plugins = loadedPlugins
519 messenger.AddLog("Checking for plugin updates")
520 microVersion := PluginVersions{
521 newStaticPluginVersion(CorePluginName, Version),
524 var updates = make(PluginDependencies, 0)
525 for _, name := range plugins {
526 pv := GetInstalledPluginVersion(name)
527 r, err := semver.ParseRange(">=" + pv) // Try to get newer versions.
529 updates = append(updates, &PluginDependency{
536 selected, err := GetAllPluginPackages().Resolve(microVersion, updates)