require go 1.22, add ENV flag for 2.x breaking changes

Makefile

@@ -140,6 +140,7 @@ clean: ## Clean the project, set it up for a new build
  @mkdir -p packaging/output/upstart
  @mkdir -p packaging/output/systemd
  @mkdir -p tmp/linux
+ @go clean -testcache
 
 run: clean generate ## Run Faktory daemon locally
  FAKTORY_PASSWORD=${PASSWORD} go run cmd/faktory/daemon.go -l debug -e development

go.mod

@@ -1,6 +1,6 @@
 module github.com/contribsys/faktory
 
-go 1.21
+go 1.22
 
 require (
  github.com/BurntSushi/toml v0.4.1

util/json.go

@@ -5,12 +5,19 @@ import (
  "encoding/json"
 )
 
+func Must[T any](obj T, err error) T {
+ if err != nil {
+ panic(err)
+ }
+ return obj
+}
+
 var (
  // If true, activates encoding/json's Decoder and its UseNumber()
  // option to preserve number precision.
  // Defaults to false in Faktory 1.x.
  // Will default to true in Faktory 2.x
- JsonUseNumber bool = false
+ JsonUseNumber bool = Faktory2Preview
 )
 
 func JsonUnmarshal(data []byte, target any) error {

util/util.go

@@ -1,13 +1,15 @@
 package util
 
 import (
+ "cmp"
  "context"
  cryptorand "crypto/rand"
  "encoding/base64"
  "fmt"
  "math/big"
  "os"
  "runtime"
+ "strconv"
  "time"
 )
 
@@ -20,6 +22,11 @@ const (
  maxInt63 = int64(^uint64(0) >> 1)
 )
 
+var (
+ // Set FAKTORY2_PREVIEW=true to enable breaking changes coming in Faktory 2.0.
+ Faktory2Preview bool = Must(strconv.ParseBool(cmp.Or(os.Getenv("FAKTORY2_PREVIEW"), "false")))
+)
+
 func Retryable(ctx context.Context, name string, count int, fn func() error) error {
  var err error
  for i := 0; i < count; i++ {