go-modernize-scanner.sh

#!/bin/bash

function go_modernize_interactive() {
    # Check if bat is installed
    if ! command -v bat &>/dev/null; then
        echo "bat is not installed. Please install it first (https://github.com/sharkdp/bat)"
        echo "You can install it with: "
        echo "  - Homebrew: brew install bat"
        echo "  - Ubuntu/Debian: apt install bat"
        echo "  - Fedora: dnf install bat"
        return 1
    fi

    # Find all Go files
    local go_files=$(find . -name "*.go" -not -path "*/vendor/*" | sort)
    if [[ -z "$go_files" ]]; then
        echo "No Go files found"
        return 1
    fi

    # Create a temporary directory for storing analysis results
    local tmp_dir=$(mktemp -d)
    trap "rm -rf $tmp_dir" EXIT

    # Analyze all files to find which ones can be modernized
    echo "Scanning for files that can be modernized..."
    local files_with_issues=()

    while IFS= read -r file; do
        echo -n "."
        local output_file="$tmp_dir/$(echo "$file" | tr '/' '_').txt"
        go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest "$file" >"$output_file" 2>&1

        # Check if there are any issues
        if [[ -s "$output_file" ]]; then
            files_with_issues+=("$file")
        fi
    done <<<"$go_files"
    echo "" # New line after progress dots

    if [[ ${#files_with_issues[@]} -eq 0 ]]; then
        echo "No modernization issues found in any files."
        return 0
    fi

    echo "Found ${#files_with_issues[@]} files that can be modernized."

    # Create a combined preview function
    preview_cmd="file={}; output_file=\"$tmp_dir/\$(echo \$file | tr '/' '_').txt\"; echo -e \"\033[1;33m=== Modernization Issues ===\033[0m\n\"; cat \"\$output_file\"; echo -e \"\n\033[1;33m=== File Content ===\033[0m\n\"; bat --style=numbers,changes --color=always \"\$file\""

    # Select files with issues to fix with full-screen preview
    local files_to_fix=$(printf "%s\n" "${files_with_issues[@]}" | fzf --multi --preview "$preview_cmd" --preview-window=right:70%:wrap)
    if [[ -z "$files_to_fix" ]]; then
        return 0
    fi

    # Ask if user wants to fix the selected files
    local action=$(echo -e "fix\ncancel" | fzf --height 20% --reverse --prompt="Apply fixes to selected files? ")
    if [[ "$action" != "fix" ]]; then
        echo "No changes made."
        return 0
    fi

    # Apply fixes to selected files
    echo "Applying modernization fixes to selected files..."
    echo "$files_to_fix" | xargs go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix

    echo "Modernization complete!"
}

go_modernize_interactive