feat(nim): add cli folder

nim/cli/constants.nim

@@ -0,0 +1,16 @@
+from types as types import Function
+
+const CLI_NAME*: string = "Line"
+const CLI_VERSION*: string = "1.0.0"
+const HELP_FUNCTION: string = "help"
+const SHORT_HELP_FUNCTION: string = "h"
+const VERSION_FUNCTION: string = "version"
+const SHORT_VERSION_FUNCTION: string = "v"
+const CLI_COPYRIGHT*: string = "Copyright (c) 2023 by Airscript"
+
+const CLI_FUNCTIONS*: Function = (
+  h: SHORT_HELP_FUNCTION,
+  v: SHORT_VERSION_FUNCTION,
+  help: HELP_FUNCTION,
+  version: VERSION_FUNCTION,
+)

nim/cli/descriptions.nim

@@ -0,0 +1,20 @@
+from std/strformat import fmt
+
+from constants as constants import CLI_NAME, CLI_VERSION, CLI_COPYRIGHT
+
+let usage: string = """
+Usage:
+  line [options]
+"""
+
+let options: string = """
+Options:
+  -h, --help          Show this help
+  -v, --version       Show the current version
+"""
+
+let help*: string = fmt"""
+{CLI_NAME} {CLI_VERSION}
+{CLI_COPYRIGHT}{'\n'}
+{usage}
+{options}"""

nim/cli/functions.nim

@@ -0,0 +1,12 @@
+from std/strformat import fmt
+
+from descriptions as descriptions import help
+from constants as constants import CLI_VERSION
+
+proc help*(): void =
+  echo descriptions.help
+  system.quit(errorcode=QuitSuccess)
+
+proc version*(): void =
+  echo fmt"{CLI_VERSION}{'\n'}"
+  system.quit(errorcode=QuitSuccess)

nim/cli/main.nim

@@ -0,0 +1,24 @@
+from std/parseopt import getopt, cmdLongOption, cmdShortOption
+
+from functions as functions import help, version
+
+from constants as constants import 
+  CLI_NAME,
+  CLI_VERSION,
+  CLI_COPYRIGHT,
+  CLI_FUNCTIONS
+
+proc options(option: string): void =
+  case option:
+    of CLI_FUNCTIONS.h, CLI_FUNCTIONS.help: help()
+    of CLI_FUNCTIONS.v, CLI_FUNCTIONS.version: version()
+    else: help()
+
+proc cli(): void =
+  for kind, key, val in getopt():
+    case kind
+      of cmdLongOption, cmdShortOption: options(key)
+      else: discard
+
+when isMainModule:
+  cli()

nim/cli/types.nim

@@ -0,0 +1,6 @@
+type
+  Function* = tuple
+    h: string
+    v: string
+    help: string
+    version: string