TUN-528: Move cloudflared into a separate repo

vendor/github.com/mholt/caddy/onevent/hook/config.go

@@ -0,0 +1,20 @@
+package hook
+
+import (
+	"github.com/mholt/caddy"
+)
+
+// Config describes how Hook should be configured and used.
+type Config struct {
+	ID      string
+	Event   caddy.EventName
+	Command string
+	Args    []string
+}
+
+// SupportedEvents is a map of supported events.
+var SupportedEvents = map[string]caddy.EventName{
+	"startup":   caddy.InstanceStartupEvent,
+	"shutdown":  caddy.ShutdownEvent,
+	"certrenew": caddy.CertRenewEvent,
+}

vendor/github.com/mholt/caddy/onevent/hook/hook.go

@@ -0,0 +1,41 @@
+package hook
+
+import (
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/mholt/caddy"
+)
+
+// Hook executes a command.
+func (cfg *Config) Hook(event caddy.EventName, info interface{}) error {
+	if event != cfg.Event {
+		return nil
+	}
+
+	nonblock := false
+	if len(cfg.Args) >= 1 && cfg.Args[len(cfg.Args)-1] == "&" {
+		// Run command in background; non-blocking
+		nonblock = true
+		cfg.Args = cfg.Args[:len(cfg.Args)-1]
+	}
+
+	// Execute command.
+	cmd := exec.Command(cfg.Command, cfg.Args...)
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	if nonblock {
+		log.Printf("[INFO] Nonblocking Command \"%s %s\" with ID %s", cfg.Command, strings.Join(cfg.Args, " "), cfg.ID)
+		return cmd.Start()
+	}
+	log.Printf("[INFO] Blocking Command \"%s %s\" with ID %s", cfg.Command, strings.Join(cfg.Args, " "), cfg.ID)
+	err := cmd.Run()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

vendor/github.com/mholt/caddy/onevent/hook/hook_test.go

@@ -0,0 +1,61 @@
+package hook
+
+import (
+	"os"
+	"path/filepath"
+	"strconv"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/mholt/caddy"
+)
+
+func TestHook(t *testing.T) {
+	tempDirPath := os.TempDir()
+
+	testDir := filepath.Join(tempDirPath, "temp_dir_for_testing_command")
+	defer func() {
+		// clean up after non-blocking startup function quits
+		time.Sleep(500 * time.Millisecond)
+		os.RemoveAll(testDir)
+	}()
+	osSenitiveTestDir := filepath.FromSlash(testDir)
+	os.RemoveAll(osSenitiveTestDir) // start with a clean slate
+
+	tests := []struct {
+		name            string
+		event           caddy.EventName
+		command         string
+		args            []string
+		shouldErr       bool
+		shouldRemoveErr bool
+	}{
+		{name: "blocking", event: caddy.InstanceStartupEvent, command: "mkdir", args: []string{osSenitiveTestDir}, shouldErr: false, shouldRemoveErr: false},
+		{name: "nonBlocking", event: caddy.ShutdownEvent, command: "mkdir", args: []string{osSenitiveTestDir, "&"}, shouldErr: false, shouldRemoveErr: true},
+		{name: "nonBlocking2", event: caddy.ShutdownEvent, command: "echo", args: []string{"&"}, shouldErr: false, shouldRemoveErr: true},
+		{name: "nonExistent", event: caddy.CertRenewEvent, command: strconv.Itoa(int(time.Now().UnixNano())), shouldErr: true, shouldRemoveErr: true},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			cfg := new(Config)
+			cfg.ID = uuid.New().String()
+			cfg.Event = test.event
+			cfg.Command = test.command
+			cfg.Args = test.args
+
+			err := cfg.Hook(test.event, nil)
+			if err == nil && test.shouldErr {
+				t.Error("Test didn't error, but it should have")
+			} else if err != nil && !test.shouldErr {
+				t.Errorf("Test errored, but it shouldn't have; got '%v'", err)
+			}
+
+			err = os.Remove(osSenitiveTestDir)
+			if err != nil && !test.shouldRemoveErr {
+				t.Errorf("Test received an error of:\n%v", err)
+			}
+		})
+	}
+}