Plugins: Compose filesystem paths with filepath.Join (#28375)

* plugins: Fix filesystem path composition

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

* plugins: Use filepath.Join to join filesystem paths

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

pkg/plugins/datasource_plugin.go

@@ -2,7 +2,7 @@ package plugins
 
 import (
 	"encoding/json"
-	"path"
+	"path/filepath"
 
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/models"
@@ -45,7 +45,7 @@ func (p *DataSourcePlugin) Load(decoder *json.Decoder, base *PluginBase, backend
 
 	if p.Backend {
 		cmd := ComposePluginStartCommand(p.Executable)
-		fullpath := path.Join(p.PluginDir, cmd)
+		fullpath := filepath.Join(p.PluginDir, cmd)
 		factory := grpcplugin.NewBackendPlugin(p.Id, fullpath, grpcplugin.PluginStartFuncs{
 			OnLegacyStart: p.onLegacyPluginStart,
 			OnStart:       p.onPluginStart,

pkg/plugins/frontend_plugin.go

@@ -54,8 +54,8 @@ func (fp *FrontendPluginBase) setPathsBasedOnApp(app *AppPlugin) {
 
 func (fp *FrontendPluginBase) handleModuleDefaults() {
 	if isExternalPlugin(fp.PluginDir) {
-		fp.Module = path.Join("plugins", fp.Id, "module")
-		fp.BaseUrl = path.Join("public/plugins", fp.Id)
+		fp.Module = filepath.Join("plugins", fp.Id, "module")
+		fp.BaseUrl = filepath.Join("public/plugins", fp.Id)
 		return
 	}
 
@@ -66,8 +66,8 @@ func (fp *FrontendPluginBase) handleModuleDefaults() {
 	currentDir := filepath.Base(fp.PluginDir)
 	// use path package for the following statements
 	// because these are not file paths
-	fp.Module = path.Join("app/plugins", fp.Type, currentDir, "module")
-	fp.BaseUrl = path.Join("public/app/plugins", fp.Type, currentDir)
+	fp.Module = filepath.Join("app/plugins", fp.Type, currentDir, "module")
+	fp.BaseUrl = filepath.Join("public/app/plugins", fp.Type, currentDir)
 }
 
 func isExternalPlugin(pluginDir string) bool {

pkg/plugins/plugins.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"path"
 	"path/filepath"
 	"reflect"
 	"runtime"
@@ -79,7 +78,7 @@ func (pm *PluginManager) Init() error {
 
 	pm.log.Info("Starting plugin search")
 
-	plugDir := path.Join(setting.StaticRootPath, "app/plugins")
+	plugDir := filepath.Join(setting.StaticRootPath, "app/plugins")
 	pm.log.Debug("Scanning core plugin directory", "dir", plugDir)
 	if err := pm.scan(plugDir, false); err != nil {
 		return errutil.Wrapf(err, "failed to scan core plugin directory '%s'", plugDir)

pkg/plugins/renderer_plugin.go

@@ -3,7 +3,7 @@ package plugins
 import (
 	"context"
 	"encoding/json"
-	"path"
+	"path/filepath"
 
 	pluginModel "github.com/grafana/grafana-plugin-model/go/renderer"
 	"github.com/grafana/grafana/pkg/infra/log"
@@ -34,7 +34,7 @@ func (r *RendererPlugin) Load(decoder *json.Decoder, base *PluginBase, backendPl
 	r.backendPluginManager = backendPluginManager
 
 	cmd := ComposePluginStartCommand("plugin_start")
-	fullpath := path.Join(r.PluginDir, cmd)
+	fullpath := filepath.Join(r.PluginDir, cmd)
 	factory := grpcplugin.NewRendererPlugin(r.Id, fullpath, grpcplugin.PluginStartFuncs{
 		OnLegacyStart: r.onLegacyPluginStart,
 		OnStart:       r.onPluginStart,

pkg/plugins/transform_plugin.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"path"
+	"path/filepath"
 	"strconv"
 
 	sdkgrpcplugin "github.com/grafana/grafana-plugin-sdk-go/backend/grpcplugin"
@@ -38,7 +38,7 @@ func (p *TransformPlugin) Load(decoder *json.Decoder, base *PluginBase, backendP
 	}
 
 	cmd := ComposePluginStartCommand(p.Executable)
-	fullpath := path.Join(p.PluginDir, cmd)
+	fullpath := filepath.Join(p.PluginDir, cmd)
 	factory := grpcplugin.NewBackendPlugin(p.Id, fullpath, grpcplugin.PluginStartFuncs{
 		OnStart: p.onPluginStart,
 	})