gzr folder export fails when dashboard contains ">" character

[weineran]

Brief Description: On Windows powershell, the gzr folder export command fails when one of the dashboards contains the ">" character. Probably because that character is invalid for windows filenames?

Steps to reproduce:

• In Looker, create a folder
• In the folder, create a dashboard with the ">" character in the name
• In Windows powershell, run:

gzr folder export <folder-number> --port=443 --host=<hostname>

• Expected: Export command should succeed.
• Actual: Export command fails with error:

C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/lib/gzr/modules/filehelper.rb:66:in `initialize': Invalid argument @ rb_sysopen - C:/Users/.../Troubleshooting/Dashboard_37_Streams > 24 Hours.json (Errno::EINVAL)
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/lib/gzr/modules/filehelper.rb:66:in `open'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/lib/gzr/modules/filehelper.rb:66:in `write_file'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/lib/gzr/commands/folder/export.rb:110:in `block in process_folder'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/lib/gzr/commands/folder/export.rb:107:in `each'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/lib/gzr/commands/folder/export.rb:107:in `process_folder'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/lib/gzr/commands/folder/export.rb:83:in `block in execute'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/lib/gzr/modules/session.rb:306:in `with_session'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/lib/gzr/commands/folder/export.rb:51:in `execute'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/lib/gzr/commands/folder.rb:84:in `export'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/thor-1.4.0/lib/thor/command.rb:28:in `run'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/thor-1.4.0/lib/thor/invocation.rb:127:in `invoke_command'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/thor-1.4.0/lib/thor.rb:538:in `dispatch'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/thor-1.4.0/lib/thor/invocation.rb:116:in `invoke'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/thor-1.4.0/lib/thor.rb:338:in `block in subcommand'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/thor-1.4.0/lib/thor/command.rb:28:in `run'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/thor-1.4.0/lib/thor/invocation.rb:127:in `invoke_command'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/thor-1.4.0/lib/thor.rb:538:in `dispatch'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/thor-1.4.0/lib/thor/base.rb:584:in `start'
        from C:/Ruby32-x64/lib/ruby/gems/3.2.0/gems/gazer-0.3.18/exe/gzr:36:in `<top (required)>'
        from C:/Ruby32-x64/bin/gzr:32:in `load'
        from C:/Ruby32-x64/bin/gzr:32:in `<main>'

[drstrangelooker]

probably need to add a sanitizer function like

def sanitize_windows_filename(filename_string)
  # Replace invalid characters with an underscore
  sanitized = filename_string.gsub(/[\<\>\:\"\/\\\|\?\*]/, '_')

  # Remove control characters (including Unicode bidirectional marks)
  sanitized = sanitized.gsub(/[\u0000-\u001F\u0080-\u009F\u200E\u200F]/, '')

  # Remove trailing periods and spaces
  sanitized = sanitized.sub(/\.+\s*$/, '')

  # Replace multiple consecutive underscores with a single underscore
  sanitized = sanitized.gsub(/_+/, '_')

  # Ensure the filename is not empty after sanitization
  sanitized = "untitled" if sanitized.empty?

  sanitized
end