refactor: decrease compile time for golang plugins

This change refactors the compiled golang plugins into 3 distinct binaries:

- commands: already existing
- subcommands/subcommands: entrypoint into all subcommands
- triggers: entrypoint into all triggers

It then further symlinks triggers and subcommands to the built binaries. This results in both a much faster build process as well as smaller package size.

plugins/network/src/subcommands/rebuild/rebuild.go

@@ -1,15 +0,0 @@
-package main
-
-import (
-	"flag"
-
-	"github.com/dokku/dokku/plugins/network"
-)
-
-// rebuilds network settings for an app
-func main() {
-	flag.Parse()
-	appName := flag.Arg(1)
-
-	network.BuildConfig(appName)
-}

plugins/network/src/subcommands/rebuildall/rebuildall.go

@@ -1,17 +0,0 @@
-package main
-
-import (
-	"github.com/dokku/dokku/plugins/common"
-	"github.com/dokku/dokku/plugins/network"
-)
-
-// rebuilds network settings for all apps
-func main() {
-	apps, err := common.DokkuApps()
-	if err != nil {
-		common.LogFail(err.Error())
-	}
-	for _, appName := range apps {
-		network.BuildConfig(appName)
-	}
-}

plugins/network/src/subcommands/report/report.go

@@ -1,34 +0,0 @@
-package main
-
-import (
-	"flag"
-	"strings"
-
-	"github.com/dokku/dokku/plugins/common"
-	"github.com/dokku/dokku/plugins/network"
-)
-
-// displays a network report for one or more apps
-func main() {
-	flag.Parse()
-	appName := flag.Arg(1)
-	infoFlag := flag.Arg(2)
-
-	if strings.HasPrefix(appName, "--") {
-		infoFlag = appName
-		appName = ""
-	}
-
-	if len(appName) == 0 {
-		apps, err := common.DokkuApps()
-		if err != nil {
-			return
-		}
-		for _, appName := range apps {
-			network.ReportSingleApp(appName, infoFlag)
-		}
-		return
-	}
-
-	network.ReportSingleApp(appName, infoFlag)
-}

plugins/network/src/subcommands/set/set.go

@@ -1,22 +0,0 @@
-package main
-
-import (
-	"flag"
-
-	"github.com/dokku/dokku/plugins/common"
-	"github.com/dokku/dokku/plugins/network"
-)
-
-// set or clear a network property for an app
-func main() {
-	flag.Parse()
-	appName := flag.Arg(1)
-	property := flag.Arg(2)
-	value := flag.Arg(3)
-
-	if property == "bind-all-interfaces" && value == "" {
-		value = "false"
-	}
-
-	common.CommandPropertySet("network", appName, property, value, network.DefaultProperties)
-}

plugins/network/src/subcommands/subcommands.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/dokku/dokku/plugins/common"
+	"github.com/dokku/dokku/plugins/network"
+)
+
+// main entrypoint to all subcommands
+func main() {
+	parts := strings.Split(os.Args[0], "/")
+	subcommand := parts[len(parts)-1]
+	flag.Parse()
+
+	switch subcommand {
+	case "rebuild":
+		appName := flag.Arg(1)
+		network.BuildConfig(appName)
+	case "rebuildall":
+		network.CommandRebuildall()
+	case "report":
+		appName := flag.Arg(1)
+		infoFlag := flag.Arg(2)
+		network.CommandReport(appName, infoFlag)
+	case "set":
+		appName := flag.Arg(1)
+		property := flag.Arg(2)
+		value := flag.Arg(3)
+		network.CommandSet(appName, property, value)
+	default:
+		common.LogFail(fmt.Sprintf("Invalid plugin subcommand call: %s", subcommand))
+	}
+}