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AR# 62015

Vivado - Can I source a Tcl script and also pass command line arguments to the script?

Description

I have a Tcl script I wish to use in Vivado.  

If I source the script and add command line arguments after it, I get an error message that I have too many positional options when calling the script.

For Example:

source example.tcl hello

ERROR: [Common 17-165] Too many positional options when parsing 'hello', please type 'source -help' for usage info.

Is it possible to provide command line arguments to a script, and how do I do it?

Solution

This error occurs because the source command to run the script only expects a single argument.  

It is not possible to add the options to the source call.

However, it is possible to get and set variables so that the script is compatible with the standard command line calls for Tcl scripts.

For example:

Start with a very simple script called example.tcl:

#example.tcl source code below

puts "The total number of arguments is $argc"
if {$argc > 0} {puts "The arguments in ARGV are: $argv" }

#end script example.tcl

You then need to populate the command line arguments yourself.

set argv [list Hello World]
set argc 2

This allows the script to be called as follows:

source example.tcl
The final result should look like the following:
set argv [list Hello World]
set argc 2
source example.tcl

The total number of arguments is 2"
The arguments in ARGV are: Hello World

 

 

 

AR# 62015
Date Created 09/11/2014
Last Updated 01/14/2015
Status Active
Type General Article
Tools
  • Vivado Design Suite