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Overview

A complex upgrade project will have many upgrade tasks (VBPs) and many rules.  The ScriptRules feature provides a means for organizing the script rules into files based on upgrade features and then applying the content of those files to the upgrade tasks conditionally. 

Script rules are placed in a ScriptRule.xml file which defines collections of script commands that may be conditionally merged with the translation script template to create different actual translation scripts. The ScriptRule syntax supports script parameters and conditional commands. This makes it possible, in one template, to describe a variety of common and task-specific upgrade commands.   

ScriptRule files are helpful for API-based upgrades tasks. These tasks use an EXE implemented using gmslAPI rather than a XML script template. The gmslAPI includes the ScriptRule class to assist with preparing a ScriptRule file content for use by the gmslAPI services.

Sample ScriptRules File

Most of the documentation for using ScriptRules is maintained in the sample ScriptRules file distributed with the product and listed below.  To you this file, add it to your user folder, modify it with the rules you need, and reference it from your main script template.

ScriptRule File Syntax

   A ScriptRule file is an XML document that may contain one or more ScriptRule 
   elements.  These elements and their attributes are described below.

<ScriptRule id="name" Condition="condition" > elements

   ScriptRule elements contain named script command collections
   
   The id attribute is the name of the ScriptRule and is also used 
   in your translation script to activate the rule.

   The Condition attribute is used to control which rules are merged into 
   to the actual translation script.

<Command Condition="condition"> elements

   Command elements are children of a ScriptRule that specify the content
   that should be merged into the translation script template.  The following 
   types of Command elements are currently supported:

   Option       Inserts commands that replace the <ScriptRule> tag in the 
                merged transcript, typically Select, Reference, and Registry commands.
             
   Compile      Inserts commands as children of the Compile block. Typically
                Select, Reference, Fix, and Refactor commands.
             
   Analyse      Inserts commands as children of the Analyse block
   PreAnalyse   Inserts commands before the Analyse block, typically refactor commands
   PostAnalyse  Inserts commands after the Analyse block, typically refactor commands
   
   Author       Inserts commands as children of the Author block, typically Fix commands

   PostAuthor   Inserts commands after the Author block, typically top level gmPL commands

   The Condition attribute is used to control which commands are merged into 
   to the actual translation script.

       
Condition attributes

   A Condition attribute may be applied to any other element. It specifies the 
   condition under which the element and its children will be merged with the 
   template script to create the actual script.

   Syntax                %variable_expression% op 'value_expression'
   
   where 
   
   variable_expression   all script variables and other characters  
   op                    == true if %variable_expression% == value_expression
                         != true if %variable_expression% != value_expression
                         =~ true if %variable_expression% matches regex value_expression
                         !~ true if %variable_expression% does not match regex value_expression
                         
   value_expression      a constant string or regex pattern
   
   Comparisons are case insensitive using trimmed strings.
                         
   Relational operators are not supported, but you can use
      Condition="var1.var2=='val1.val2'" to simulate locical AND
      Condition="var=~'val1|val2'"       to simulate logical OR

   For example  Condition="%SrcName%=='ScanToolUI'" indicates that the associated 
                element will only be merged for upgrade tasks having SrcName equal
                to the string "ScanToolUI".
               
<ForEach>, <Iterator>, and <Each> elements

   ForEach elements are children of the ScriptRule. They allow repeating 
   Command elements for each file in the source project folder that meet 
   certain criteria.  This element may also be used to copy files
   from the source project folder to the .NET project folder.
   
   The set of files to iterate over is defined by a <Iterator/FileInfo> element 
   according to its attributes:  
   
   The FileInfo Criteria attribute is a search pattern (e.g. *.wav) used to 
   get files from the source folder.  
   
   The FileInfo Files attribute may be "All" or "Top".  The default is "All".  
   If Files="All", the root of the source folder and all of its sub-folders are 
   searched; if Files="Top", only the root of the source folder is searched.
   
   The CopyFiles attribute may be "On" or "Off".  The default is "On". If 
   CopyFiles="on", the files found in the source project folder will be copied
   to the corresponding .NET project folder with directory structure preserved.
   The folders and files are copied prior to the translation process.
   
   Within the <Each> block, the notation %FileInfo.member% may be used to refer 
   to information about the files found in the source folder:

   %FileInfo.RelativeName%: path relative to the source project root
   %FileInfo.Name%: file name
   %FileInfo.FullName%: full path
   %FileInfo.DirectoryName%: parent folder name

Activating a ScriptRule

   Adding a <ScriptRule> tag to the script requests the merging of the named
   script collection.

   <ScriptRule id="name" attributeList /> 

   The id attribute specifies the command collection to add.

   The attributeList specifies variables that may be referenced elsewhere 
   in the ScriptRule. Variable references are case insensitive. 

   For example the following ScriptRule tag: 

   <ScriptRule id="IncludeResources" Criteria="*.wav" /> 

   requests loading the command collection named IncludeResouces and 
   creates a ScriptRule variable named %Criteria% with value = "*.wav"
   
Specifying the ScriptRule file

   By default, the ScriptRule XML is located in a file called ScriptRule.xml 
   and is typically kept in the workspace\usr folder.
   
   If desired, you may specify an alternate location using a FileName attribute
   
See Also:

   For more information, see the "Eval" VB6 Upgrade sample here 
   https://portal.greatmigrations.com/display/GMG/Samples
-->
<ScriptRules>
<!-- Here is a sample of the ScriptRule syntax -->
<ScriptRule id="BasicRules">
   <Option>
      <!-- directories for configuration files -->

      <select Target="%UserFolder%" />
      <Select Local="%IdfFromCodeFolder%" />
      <Select System="%IdfFromIdlFolder%" />

      <!-- translation options -->

      <Select Progress="1" />
      <Select DevEnv="%DevEnv%" />
      <Select Dialect="%Dialect%" />
      <Select BuildFile="local" />

      <!-- directories for deployment and external assemblies -->

      <select VirtualRoot="%VirtualRoot%" />
      <Select DeployLocation="%NetProjFolder%" />
      <Select Library="%RuntimeFolder%" />

      <!-- custom processing commands -->

   </Option>
   <Compile Condition="%SrcName%=~'Project1|Project2'" >
      <!-- pre-edits -->
      <!-- compile refactors commands-->
   </Compile>
   <PreAnalyse>
      <!-- pre-analyse refactor commands -->
   </PreAnalyse>
   <PostAnalyse>
      <!-- post-analyse refactors commands-->
   </PostAnalyse>
   <Author Condition="%SrcName%=~'Project1|Project2'" >
      <!-- post-edits -->          
   </Author>
</ScriptRule>
</ScriptRules>
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