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load.go
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load.go
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package loader
import (
"fmt"
"os"
"github.com/ipfs/go-ipfs/plugin"
logging "gx/ipfs/QmSpJByNKFX1sCsHBEp3R73FL4NF6FnQTEGyNAXHm2GS52/go-log"
)
var log = logging.Logger("plugin/loader")
var loadPluginsFunc = func(string) ([]plugin.Plugin, error) {
return nil, nil
}
// LoadPlugins loads and initializes plugins.
func LoadPlugins(pluginDir string) ([]plugin.Plugin, error) {
plMap := make(map[string]plugin.Plugin)
for _, v := range preloadPlugins {
plMap[v.Name()] = v
}
newPls, err := loadDynamicPlugins(pluginDir)
if err != nil {
return nil, err
}
for _, pl := range newPls {
if ppl, ok := plMap[pl.Name()]; ok {
// plugin is already preloaded
return nil, fmt.Errorf(
"plugin: %s, is duplicated in version: %s, "+
"while trying to load dynamically: %s",
ppl.Name(), ppl.Version(), pl.Version())
}
plMap[pl.Name()] = pl
}
pls := make([]plugin.Plugin, 0, len(plMap))
for _, v := range plMap {
pls = append(pls, v)
}
err = initialize(pls)
if err != nil {
return nil, err
}
err = run(pls)
return nil, err
}
func loadDynamicPlugins(pluginDir string) ([]plugin.Plugin, error) {
_, err := os.Stat(pluginDir)
if os.IsNotExist(err) {
return nil, nil
}
if err != nil {
return nil, err
}
return loadPluginsFunc(pluginDir)
}