Refactor profiling and benchmarking tools from bash to Go

This major refactoring replaces all bash-based profiling and benchmarking
scripts with a unified Go tool (dtail-tools) that provides:

- Better cross-platform compatibility
- Improved error handling and reliability
- Structured data generation for test files
- Consistent command-line interface
- Easier maintenance and extensibility

Key changes:
- Created dtail-tools command with profile and benchmark subcommands
- Implemented common utilities for data generation and file operations
- Updated Makefile to use the new Go-based tools
- Maintained backward compatibility with existing make targets
- Fixed ParseSize to handle single-letter suffixes (10M, 1G, etc.)

The new tool supports all previous functionality:
- profile-quick, profile-all, profile-dmap
- benchmark creation, comparison, and management
- Test data generation with multiple formats
- Profile analysis and listing

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/cmd/dtail-tools/main.go b/cmd/dtail-tools/main.go
new file mode 100644
index 0000000..591ed4b
--- /dev/null
+++ b/cmd/dtail-tools/main.go
@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/mimecast/dtail/internal/tools/benchmark"
+	"github.com/mimecast/dtail/internal/tools/profile"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		printUsage()
+		os.Exit(1)
+	}
+
+	command := os.Args[1]
+	
+	// Remove command from args for subcommand parsing
+	os.Args = append([]string{os.Args[0]}, os.Args[2:]...)
+
+	switch command {
+	case "profile":
+		if err := profile.Run(); err != nil {
+			fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+			os.Exit(1)
+		}
+	case "benchmark":
+		if err := benchmark.Run(); err != nil {
+			fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+			os.Exit(1)
+		}
+	case "help", "-h", "--help":
+		printUsage()
+	default:
+		fmt.Fprintf(os.Stderr, "Unknown command: %s\n", command)
+		printUsage()
+		os.Exit(1)
+	}
+}
+
+func printUsage() {
+	fmt.Println("dtail-tools - DTail performance analysis toolkit")
+	fmt.Println()
+	fmt.Println("Usage: dtail-tools <command> [options]")
+	fmt.Println()
+	fmt.Println("Commands:")
+	fmt.Println("  profile    Run profiling on dtail commands")
+	fmt.Println("  benchmark  Run benchmarks and manage baselines")
+	fmt.Println("  help       Show this help message")
+	fmt.Println()
+	fmt.Println("Run 'dtail-tools <command> -h' for command-specific help")
+}
\ No newline at end of file