Added show command

src/serl/constants.py

@@ -22,6 +22,7 @@
     install    install language to {SYSTEM_CONFIG_DIR} in home directory.
     uninstall  Uninstall language from {SYSTEM_CONFIG_DIR} in home directory.
     list       list installed languages.
+    show       Display language.
     run        Execute language.
     help       Show help for commands.
 
@@ -62,6 +63,16 @@
 
 {OPTIONS}"""
 
+CLI_SHOW = f"""{NAME} show
+
+Usage:
+    show [options] <language>
+
+Show Options:
+    -o, --output=FILE  Write language config to file.
+    
+{OPTIONS}"""
+
 RUN_OPTIONS = f"""Run Options:
     -r, --requirements            Install pip requirements.
     --debug-lexer                 Output tokens found line-by-line.
@@ -104,6 +115,7 @@
     'install': CLI_INSTALL,
     'uninstall': CLI_UNINSTALL,
     'list': CLI_LIST,
+    'show': CLI_SHOW,
     'run': CLI_RUN,
     'help': CLI_HELP
 }

src/serl/main.py

@@ -454,6 +454,13 @@ def command_line_list(args):
     else:
         print(*files, sep='\n')
 
+def command_line_show(args):
+    language = args['<language>']
+    config_text = get_config_text(language, get_link_filename())
+    filename = args['--output'] or 1
+    with open(filename, 'w') as file:
+      file.write(config_text)
+
 def get_symlink_args(filename, version) -> dict:
     # Stop initial args acting on the tool and not the language
     if not '--' in sys.argv: