chore: move limits to a separate file

internal/system/limits.go

@@ -0,0 +1,23 @@
+package system
+
+import "runtime"
+
+const (
+	// https://serverfault.com/questions/69430/what-is-the-maximum-length-of-a-command-line-in-mac-os-x
+	// https://support.microsoft.com/en-us/help/830473/command-prompt-cmd-exe-command-line-string-limitation
+	// https://unix.stackexchange.com/a/120652
+	maxCommandLengthDarwin  = 260000 // 262144
+	maxCommandLengthWindows = 7000   // 8191, but see issues#655
+	maxCommandLengthLinux   = 130000 // 131072
+)
+
+func MaxCmdLen() int {
+	switch runtime.GOOS {
+	case "windows":
+		return maxCommandLengthWindows
+	case "darwin":
+		return maxCommandLengthDarwin
+	default:
+		return maxCommandLengthLinux
+	}
+}

internal/system/system.go

@@ -4,20 +4,10 @@ package system
 import (
 	"os"
 	"os/exec"
-	"runtime"
 
 	"github.com/evilmartians/lefthook/internal/log"
 )
 
-const (
-	// https://serverfault.com/questions/69430/what-is-the-maximum-length-of-a-command-line-in-mac-os-x
-	// https://support.microsoft.com/en-us/help/830473/command-prompt-cmd-exe-command-line-string-limitation
-	// https://unix.stackexchange.com/a/120652
-	maxCommandLengthDarwin  = 260000 // 262144
-	maxCommandLengthWindows = 7000   // 8191, but see issues#655
-	maxCommandLengthLinux   = 130000 // 131072
-)
-
 type Executor struct{}
 
 // Execute executes git command with LEFTHOOK=0 in order
@@ -41,14 +31,3 @@ func (e Executor) Execute(args []string, root string) (string, error) {
 
 	return string(out), nil
 }
-
-func MaxCmdLen() int {
-	switch runtime.GOOS {
-	case "windows":
-		return maxCommandLengthWindows
-	case "darwin":
-		return maxCommandLengthDarwin
-	default:
-		return maxCommandLengthLinux
-	}
-}