56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
package tomo
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import "os"
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import "plugin"
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import "path/filepath"
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var pluginPaths []string
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func loadPlugins () {
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for _, dir := range pluginPaths {
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if dir != "" {
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loadPluginsFrom(dir)
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}
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}
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}
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func loadPluginsFrom (dir string) {
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entries, err := os.ReadDir(dir)
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// its no big deal if one of the dirs doesn't exist
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if err != nil { return }
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for _, entry := range entries {
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if entry.IsDir() { continue }
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if filepath.Ext(entry.Name()) != ".so" { continue }
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pluginPath := filepath.Join(dir, entry.Name())
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loadPlugin(pluginPath)
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}
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}
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func loadPlugin (path string) {
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die := func (reason string) {
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println("tomo: could not load plugin at", path + ":", reason)
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}
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plugin, err := plugin.Open(path)
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if err != nil {
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die(err.Error())
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return
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}
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// check for and obtain basic plugin functions
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name, ok := extract[func () string](plugin, "Name")
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if !ok { die("does not implement Name() string"); return }
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_, ok = extract[func () string](plugin, "Description")
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if !ok { die("does not implement Description() string"); return }
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println("tomo: loaded plugin", name())
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}
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func extract[T any] (plugin *plugin.Plugin, name string) (value T, ok bool) {
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symbol, err := plugin.Lookup(name)
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if err != nil { return }
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value, ok = symbol.(T)
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return
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}
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