rta: use callsites in AFor instead re-resolving stuff

[nit.git] / src / toolcontext.nit

diff --git a/src/toolcontext.nit b/src/toolcontext.nit
index b91fdad..85d7cd6 100644 (file)
--- a/src/toolcontext.nit
+++ b/src/toolcontext.nit
@@ -21,6 +21,7 @@ module toolcontext
 
 import opts
 import location
+import version
 
 class Message
        super Comparable
@@ -179,7 +180,15 @@ class ToolContext
        # eg. `"Usage: tool [OPTION]... [FILE]...\nDo some things."`
        var tooldescription: String writable = "Usage: [OPTION]... [ARG]..."
 
+       # Does `process_options` should accept an empty sequence of arguments.
+       # ie. nothing except options.
+       # Is `false` by default.
+       #
+       # If required, if should be set by the client before calling `process_options`
+       var accept_no_arguments writable = false
+
        # print the full usage of the tool.
+       # Is called by `process_option` on `--help`.
        # It also could be called by the client.
        fun usage
        do
@@ -188,13 +197,37 @@ class ToolContext
        end
 
        # Parse and process the options given on the command line
-       fun process_options
+       fun process_options(args: Sequence[String])
        do
                self.opt_warn.value = 1
 
                # init options
                option_context.parse(args)
 
+               if opt_help.value then
+                       usage
+                       exit 0
+               end
+
+               if opt_version.value then
+                       print nit_version
+                       exit 0
+               end
+
+               var errors = option_context.get_errors
+               if not errors.is_empty then
+                       for e in errors do print "Error: {e}"
+                       print tooldescription
+                       print "Use --help for help"
+                       exit 1
+               end
+
+               if option_context.rest.is_empty and not accept_no_arguments then
+                       print tooldescription
+                       print "Use --help for help"
+                       exit 1
+               end
+
                # Set verbose level
                verbose_level = opt_verbose.value