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Invoke command line scripts via back-tick (DEPRECATED)

This pages describes features, codes or syntax whose use is now DEPRECATED, i.e. not advised either for new or continued pre-existing use.

Deprecated aspects of Tinderbox may be supported on a legacy basis but the latter support can't be presumed to be indefinite. Therefore you should update your active TBX documents to latest practice as soon as practical.

DEPRECATED - use the runCommand function - see runCommand(). Where is the working directory location assumed for executing scripts?

Actions may invoke command-line scripts. An alternate, and better way to access command lines is to use the runCommand() operator. The latter also benefits from not requiring a left side to the expression and allows more scope for control of whitespace and use of quotes. Where is the working directory location assumed for executing scripts?

The action

$MyString=`"perl -v" 

runs the command

perl -v 

and copies its standard output to the user string attribute $MyString.

The command is interpreted by /bin/sh.

The ` operator is not handled as a conventional unary operator, like negate (-). Tinderbox will do full variable interpolation, and the command may be assembled from other attributes and references:


So, the ` operator applies to everything up to the succeeding semicolon or the end of the command.

$MyString=`"ls -l;"$Color="red";$BorderColor="white"; 

The command may thus contain spaces. The command begins with the first non-white-space character following the `, and continues to the first semicolon. For example:

$MyString=`"perl -v;"$Color="red";$MyDir=`"pwd" 

Attribute interpolation is applied to the entire command line:

$Delivered=`myQuery $TrackingID $UserName(parent) 

If you need to include the $ character in a command, escape it with backslash.

Interpolated attribute names are terminated when Tinderbox reaches the end of the command, a character that can't be part of an attribute name (e.g. white space), or a second $. Thus, if $AccountNumber holds the string "3716",

$Delivered=`myDatebaseQuery $AccountNumber$x31 

would create the command:

myDatabaseQuery 3716x31 

From v5.8.0, the older method of evaluating $References within quoted strings has been discontinued.

Possible relevant notes (via "Similar Notes" feature):

A Tinderbox Reference File : Import/Export/Formatting : Invoke command line scripts via back-tick (DEPRECATED)