Hello, As part of a project, I write a tool in nim.
There is the following code.
import terminal
import strutils
import rdstdin
import linenoise
import cmd
import ../libalbinos/albinos
const help_cmd_msg = "\t\e[93mhelp\e[39m (show this message)\n\t"
const exit_cmd_msg = "\e[93mexit\e[39m (quitting the app)\n\t"
const clear_cmd_msg = "\e[93mclear\e[39m (clear the screen)\n\t"
const config_create_cmd_msg = "\e[93mconfig\e[39m \e[94mcreate\e[39m
<\e[95mname\e[39m> (create a config with the given name)"
const global_help = "Usage:\n" & help_cmd_msg & exit_cmd_msg &
clear_cmd_msg &
config_create_cmd_msg
proc yes(question: string): bool =
echo question, " (\e[93my\e[39m/\e[93mN\e[39m)"
while true:
var line: TaintedString
let res = readLineFromStdin("Answer: ", line)
if res == false:
styledEcho(fgMagenta, "Question Aborted, (assuming no).")
return false
case line:
of "y", "Y", "yes", "Yes": return true
of "n", "N", "no", "No": return false
else: echo "Please be clear: yes or no, you write ", line, "."
proc handleCreateConfigCmd(args: openArray[string]) =
styledEcho "Creating configuration ", fgMagenta, args[1], fgWhite, "..."
let (cfg, result) = createCfg(args[1])
case result:
of ReturnedValue.SUCCESS:
var regularKey: Key
var readOnlyKey: Key
discard getConfigKey(cfg, addr regularKey)
discard getReadOnlyConfigKey(cfg, addr readOnlyKey)
styledEcho "Successfuly created configuration ", fgMagenta,
args[
1], fgWhite
styledEcho "Regular key: ", fgGreen,
$cast[cstring](regularKey.data)
styledEcho "Read only key: ", fgGreen,
$cast[cstring](readOnlyKey.data)
else:
echo result
return
if yes("Do you want to load the configuration: " & "\e[35m" & args[
1] & "\e[39m" & " ?"):
echo "Loading configuration"
proc handleConfigCmd(configCmdArgs: openArray[string]) =
case len(configCmdArgs):
of 3:
case configCmdArgs[1]:
of "create":
handleCreateConfigCmd(configCmdArgs[1..2])
else:
echo global_help
else:
echo global_help
proc cliLoop() =
while true:
var line: TaintedString
let res = readLineFromStdin("> ", line)
if res == false:
styledEcho(fgMagenta, "Quitting CLI mode...")
break
let args = line.string.unindent.splitWhitespace
case args[0]:
of "exit": break
of "help":
echo global_help
continue
of "clear":
clearScreen()
continue
of "config":
handleConfigCmd(toOpenArray(args, 0, len(args) - 1))
else:
echo global_help
proc launchCLI*() =
discard historySetMaxLen(500)
cliLoop()
Run
As you can see, I use a lot of colors. I would like to have the option to
disable these colors in a simple way. I have tested for the moment with a
command-line option (--colors=false)
The problem is that I do not find my way to do very clever: detection of the
option, rewrite all strings without color code, and a condition to choose
between echo and styledEcho
I would also like to have some feedback on the code, this is my first program
in Nim, if there is more simple way than what I did, a more idiomatic one.
Thank's a lot for your help !
