Verified Solution[docker/cli] Wrong ANSI font representation
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### ROOT CAUSE
The issue arises because the ANSI escape codes used for font styling (e.g., bold, color) are either incorrect or not being applied properly. This could be due to improper escape sequence generation, incorrect terminal handling, or mismatched escape codes for the terminal's capabilities. The problem may stem from hard-coded escape sequences that don't account for variations in terminal emulators or incorrect use of ANSI code parameters.
### CODE FIX
Ensure ANSI escape codes are properly generated and applied. Here's a Go fix that uses a helper function to generate escape codes safely, with proper resetting:
```go
package main
import (
"fmt"
"os"
)
// Helper function to generate ANSI escape codes
func ansi(code string) string {
return "\033[" + code + "m"
}
func main() {
// Example usage with bold and reset
fmt.Println(ansi("1m") + "This text is bold" + ansi("0m"))
// Check if output is a terminal before printing styled text
if len(os.Getenv("TERM")) != 0 {
fmt.Println(ansi("31m") + "This text is red" + ansi("0m"))
} else {
fmt.Println("Plain text (no terminal)")
}
}
```
This solution:
1. Uses a helper function to generate ANSI codes safely
2. Includes proper reset codes (ANSI 0)
3. Checks if output is a terminal before applying styles
4. Follows standard ANSI codes (e.g., 1=bold, 31=red)
The fix ensures compatibility across terminals and avoids double-encoding issues.
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