https://github.com/laurentdardenne/template

Code generation by using text templates
https://github.com/laurentdardenne/template

conditional parsing-engine powershell powershell-module preprocessing preprocessor regex template template-engine transformations

Last synced: about 1 month ago
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Code generation by using text templates

• Host: GitHub
• URL: https://github.com/laurentdardenne/template
• Owner: LaurentDardenne
• Created: 2016-10-20T11:35:05.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2017-08-01T10:32:13.000Z (over 7 years ago)
• Last Synced: 2024-05-22T22:35:45.107Z (7 months ago)
• Topics: conditional, parsing-engine, powershell, powershell-module, preprocessing, preprocessor, regex, template, template-engine, transformations
• Language: PowerShell
• Size: 170 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md

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README

        
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![Logo](https://raw.githubusercontent.com/LaurentDardenne/Template/master/Assets/Template.png)

# Template

Code generation by using text templates.

A template specifies a text template with placeholders for data to be extracted from models.

The 'Template' module offers these features:

 * [Text replacement](https://github.com/LaurentDardenne/Template/wiki/Text-replacement), simple or by regex or regex with [MatchEvaluator](https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.matchevaluator(v=vs.110).aspx) (Scriptblock)

 * [File inclusion](https://github.com/LaurentDardenne/Template/wiki/File-inclusion)

 * [Directive to run embedded scripts](https://github.com/LaurentDardenne/Template/wiki/Directive-to-run-embedded-scripts)

 * [Conditionnal directive](https://github.com/LaurentDardenne/Template/wiki/Conditionnal-directives) (#Define & #Undef)

 * [Removal and uncomment directive](https://github.com/LaurentDardenne/Template/wiki/Removal-and-uncomment-directive)

## Install

```powershell

$PSGalleryPublishUri = 'https://www.myget.org/F/ottomatt/api/v2/package'

$PSGallerySourceUri = 'https://www.myget.org/F/ottomatt/api/v2'

Register-PSRepository -Name OttoMatt -SourceLocation $PSGallerySourceUri -PublishLocation $PSGalleryPublishUri #-InstallationPolicy Trusted

Install-Module Template -Repository OttoMatt

```

## Principle

A template is a file that serves as a starting point for a new document.

The 'Template' module, allow to insert directives, as a comment, inside the source code.

For example :

```Powershell

    Write-Debug 'Test' #<%REMOVE%>

```

In this case, the presence of this directive does not require to transform the source code before to execute it.

For this example, the directives require a transformation :

```Powershell

Import-Module Template

 #Initialize-TemplateModule.ps1 create the hashtable $TemplateDefaultSettings

$File='C:\temp\Code.PS1'

@'

Write 'Text before the directive'

<#%ScriptBlock%

    #

        . .\Convert-ObjectToClass.ps1

        #Class PS >= v5

        Convert-ObjectToClass -InputObject (Get-Process|Select Name,VirtualMemorySize -First 1)

    #

    #

        . .\New-PSCustomObjectFunction.ps1

        #PSCustomObject >= v3

        New-PSCustomObjectFunction -Noun ProcessLight -Parameters Name,VirtualMemorySize -AsFunction

    #

#>

Write 'Text after the directive'

'@ > $File

```

The following script transform the content:

```Powershell

[string[]]$Lines=Get-Content -Path $File  -ReadCount 0 -Encoding UTF8

  #Edit-Template need an ARRAY of string

$Result=,$Lines|Edit-Template -ConditionnalsKeyWord  "V5"|

 Edit-Template -Clean

$Result

```

to :

```Powershell

Write 'Text before the directive'

<#%ScriptBlock%

        . .\New-PSCustomObjectFunction.ps1

        #PSCustomObject >= v3

        New-PSCustomObjectFunction -Noun ProcessLight -Parameters Name,VirtualMemorySize -File

#>

Write 'Text after the directive'

```

The text between the directive \#<DEFINE %V5%> and \#<UNDEF %V5%> is deleted.

The parameter _*-Clean*_ remove the remaining directives inside the text.

The second step, invoke the script to generate text :

```Powershell

 #Edit-String need a string

$ofs="`r`n"

"$Result"|

 Edit-String -Setting  $TemplateDefaultSettings

```

The final source code :

```Powershell

Write 'Text before the directive'

Function New-ProcessLight{

param(

         [Parameter(Mandatory=$True,position=0)]

        $Name,

         [Parameter(Mandatory=$True,position=1)]

        $VirtualMemorySize

)

  [pscustomobject]@{

    PSTypeName='ProcessLight';

    Name=$Name;

    VirtualMemorySize=$VirtualMemorySize;

   }

}# New-ProcessLight

Write 'Text after the directive'

```

With this script :

```Powershell

Get-Content -Path $File  -ReadCount 0 -Encoding UTF8|

 Edit-Template -ConditionnalsKeyWord  "V3"|

 Edit-Template -Clean|

 Out-string|

 Edit-String -Hashtable $TemplateDefaultSettings

```

The result text is :

```Powershell

Write 'Text before the directive'

class ProcessLight

{

        [string] $Name;

        [int] $VirtualMemorySize;

        ProcessLight([System.Diagnostics.Process] $Process) {

                $this.Name = $Process.Name

                $this.VirtualMemorySize = $Process.VirtualMemorySize

        }

} #ProcessLight

Write 'Text after the directive'

```