Backtick is not working in Modules Release Tcl 1.578

[balaramr]

Backtick is not working in Modules Release Tcl 1.578

Modules version and configuration -- Modules Release Tcl 1.578

$ > module --version
Modules Release Tcl 1.578
$ >

To Reproduce Error and debugging information

Steps to reproduce the behavior:

$ > vi opensource 
Copyright (C) 2009-2018. All rights reserved.
#%Module

prepend-path	PATH	/opt/opensource/bin
prepend-path	LD_LIBRARY_PATH	/opt/opensource/lib64:
setenv		CURRENT_DIR	`pwd`

$ > module load opensource
$ > echo $CURRENT_DIR
`pwd`
$ > 

In direct shell

If we try this directly in shell backtick is working fine.

$ > setenv  CURRENT_DIR  `pwd`
$ > echo $CURRENT_DIR
/home/john
$ > 

Working -- Modules Release Tcl 3.1.6

Same thing is working in other module version

$ > module --version
Modules Release Tcl 3.1.6
$ >

Working in Module 3.1.6 version

$ > module load opensource
$ > echo $CURRENT_DIR
/home/john
$ > 

[xdelaruelle]

Backticks are now escaped to be used in environment variable values or in shell alias or shell function definition. This applies to Modules-Tcl but also to newer version of Modules, starting version 4.0.

To achieve the backtick shell mechanism when defining an environment variables, the exec Tcl command has to be used:

setenv		CURRENT_DIR	[exec pwd]

I will clarify this change in the diff v3 v4 document.