function reuse Dabbler 5/16/2007 3:59:00 AM How do I reuse a function in one script file, say foo.ps1 from another script file say main.ps1? Confused about modular programming with PowerShell ! Thanks much.

Re: function reuse Jeffery Hicks <"jhicks[at]SAPIEN.com"> 5/16/2007 1:46:58 PM On Tue, 15 May 2007 20:59:00 -0700, Dabbler wrote: [Quoted Text] > How do I reuse a function in one script file, say foo.ps1 from another script > file say main.ps1? > > Confused about modular programming with PowerShell ! > > Thanks much. The quick and easy way is to put the functions in your profile. Otherwise you have scope issues where the functions from one script aren't available to the other script. You can certainly call one script from another. This works: #foo.ps1 Function alpha { Write-Host "This is function alpha in foo.ps1" } alpha #end foo.ps1 #bar.ps1 Write-Host "Running bar.ps1" ..\foo.ps1 #end bar.ps1 When I execute bar.ps1, the script foo.ps1 is executed and the function within it. Otherwise, you need to set the scope of the function in foo.ps1 to global: #foo.ps1 Function global:alpha { Write-Host "This is function alpha in foo.ps1" } #end foo.ps1 Now bar.ps1 can look like this: #bar.ps1 Write-Host "Running bar.ps1" ..\foo.ps1 alpha #end bar.ps1 When bar.ps1 is executed the alpha function is available. And it will be available in the shell because it now has a global scope. -- Jeffery Hicks SAPIEN Technologies - Scripting, Simplified. www.SAPIEN.com VBScript & Windows PowerShell Training - www.ScriptingTraining.com/classes.asp Windows PowerShell? - www.SAPIENPress.com/powershell.asp blog: http://blog.SAPIEN.com blog: http://jdhitsolutions.blogspot.com

Re: function reuse Dabbler 5/16/2007 2:12:01 PM Thanks Jeffery, that's what I was looking for. I think your latter solution of using global scope makes the most sense. The ./foo.ps1 then approximates "include" in other languages. "Jeffery Hicks" <"jhicks[at]SAPIEN.com" wrote: [Quoted Text] > On Tue, 15 May 2007 20:59:00 -0700, Dabbler wrote: > > > How do I reuse a function in one script file, say foo.ps1 from another script > > file say main.ps1? > > > > Confused about modular programming with PowerShell ! > > > > Thanks much. > > The quick and easy way is to put the functions in your profile. Otherwise > you have scope issues where the functions from one script aren't available > to the other script. You can certainly call one script from another. This > works: > > #foo.ps1 > Function alpha { > Write-Host "This is function alpha in foo.ps1" > } > > alpha > #end foo.ps1 > > #bar.ps1 > Write-Host "Running bar.ps1" > > ..\foo.ps1 > #end bar.ps1 > > When I execute bar.ps1, the script foo.ps1 is executed and the function > within it. > > Otherwise, you need to set the scope of the function in foo.ps1 to global: > #foo.ps1 > Function global:alpha { > Write-Host "This is function alpha in foo.ps1" > } > #end foo.ps1 > > Now bar.ps1 can look like this: > #bar.ps1 > Write-Host "Running bar.ps1" > ..\foo.ps1 > alpha > #end bar.ps1 > > When bar.ps1 is executed the alpha function is available. And it will be > available in the shell because it now has a global scope. > > > > -- > Jeffery Hicks > SAPIEN Technologies - Scripting, Simplified. www.SAPIEN.com > VBScript & Windows PowerShell Training - > www.ScriptingTraining.com/classes.asp > Windows PowerShell? - www.SAPIENPress.com/powershell.asp > > blog: http://blog.SAPIEN.com > blog: http://jdhitsolutions.blogspot.com >

Re: function reuse Jeffery Hicks <"jhicks[at]SAPIEN.com"> 5/16/2007 2:54:46 PM On Wed, 16 May 2007 07:12:01 -0700, Dabbler wrote: [Quoted Text] > Thanks Jeffery, that's what I was looking for. I think your latter solution > of using global scope makes the most sense. The ./foo.ps1 then approximates > "include" in other languages. > > "Jeffery Hicks" <"jhicks[at]SAPIEN.com" wrote: > >> On Tue, 15 May 2007 20:59:00 -0700, Dabbler wrote: >> >>> How do I reuse a function in one script file, say foo.ps1 from another script >>> file say main.ps1? >>> >>> Confused about modular programming with PowerShell ! >>> >>> Thanks much. >> >> The quick and easy way is to put the functions in your profile. Otherwise >> you have scope issues where the functions from one script aren't available >> to the other script. You can certainly call one script from another. This >> works: >> >> #foo.ps1 >> Function alpha { >> Write-Host "This is function alpha in foo.ps1" >> } >> >> alpha >> #end foo.ps1 >> >> #bar.ps1 >> Write-Host "Running bar.ps1" >> >> ..\foo.ps1 >> #end bar.ps1 >> >> When I execute bar.ps1, the script foo.ps1 is executed and the function >> within it. >> >> Otherwise, you need to set the scope of the function in foo.ps1 to global: >> #foo.ps1 >> Function global:alpha { >> Write-Host "This is function alpha in foo.ps1" >> } >> #end foo.ps1 >> >> Now bar.ps1 can look like this: >> #bar.ps1 >> Write-Host "Running bar.ps1" >> ..\foo.ps1 >> alpha >> #end bar.ps1 >> >> When bar.ps1 is executed the alpha function is available. And it will be >> available in the shell because it now has a global scope. >> >> >> >> -- >> Jeffery Hicks >> SAPIEN Technologies - Scripting, Simplified. www.SAPIEN.com >> VBScript & Windows PowerShell Training - >> www.ScriptingTraining.com/classes.asp >> Windows PowerShell? - www.SAPIENPress.com/powershell.asp >> >> blog: http://blog.SAPIEN.com >> blog: http://jdhitsolutions.blogspot.com >> I put alot of the functions I use in my profile so they are always available. -- Jeffery Hicks SAPIEN Technologies - Scripting, Simplified. www.SAPIEN.com VBScript & Windows PowerShell Training - www.ScriptingTraining.com/classes.asp Windows PowerShell? - www.SAPIENPress.com/powershell.asp blog: http://blog.SAPIEN.com blog: http://jdhitsolutions.blogspot.com

Re: function reuse Dabbler 5/17/2007 9:58:01 AM I'm still bothered by this. Having been raised on modular programming methodology it seems "unfair" that I can't create modular script files and call them without having to convert them to global functions and preload them. I found a case in point on PowerGadget website, a script called gpo.ps1. http://powergadgets.com/csPg/forums/permalink/413/284/ShowThread.aspx#284 It's purpose is to run an external command passed in as a parameter and execute it while hiding the command window flash. I can't figure out how they are able to call it, as I get the cmdlet not found error when I use it. The file doesn't contain a function so I can't pre-load the function into my workspace by using ./gpo.ps1. Any thoughts on this? "Jeffery Hicks" <"jhicks[at]SAPIEN.com" wrote: [Quoted Text] > On Wed, 16 May 2007 07:12:01 -0700, Dabbler wrote: > > > Thanks Jeffery, that's what I was looking for. I think your latter solution > > of using global scope makes the most sense. The ./foo.ps1 then approximates > > "include" in other languages. > > > > "Jeffery Hicks" <"jhicks[at]SAPIEN.com" wrote: > > > >> On Tue, 15 May 2007 20:59:00 -0700, Dabbler wrote: > >> > >>> How do I reuse a function in one script file, say foo.ps1 from another script > >>> file say main.ps1? > >>> > >>> Confused about modular programming with PowerShell ! > >>> > >>> Thanks much. > >> > >> The quick and easy way is to put the functions in your profile. Otherwise > >> you have scope issues where the functions from one script aren't available > >> to the other script. You can certainly call one script from another. This > >> works: > >> > >> #foo.ps1 > >> Function alpha { > >> Write-Host "This is function alpha in foo.ps1" > >> } > >> > >> alpha > >> #end foo.ps1 > >> > >> #bar.ps1 > >> Write-Host "Running bar.ps1" > >> > >> ..\foo.ps1 > >> #end bar.ps1 > >> > >> When I execute bar.ps1, the script foo.ps1 is executed and the function > >> within it. > >> > >> Otherwise, you need to set the scope of the function in foo.ps1 to global: > >> #foo.ps1 > >> Function global:alpha { > >> Write-Host "This is function alpha in foo.ps1" > >> } > >> #end foo.ps1 > >> > >> Now bar.ps1 can look like this: > >> #bar.ps1 > >> Write-Host "Running bar.ps1" > >> ..\foo.ps1 > >> alpha > >> #end bar.ps1 > >> > >> When bar.ps1 is executed the alpha function is available. And it will be > >> available in the shell because it now has a global scope. > >> > >> > >> > >> -- > >> Jeffery Hicks > >> SAPIEN Technologies - Scripting, Simplified. www.SAPIEN.com > >> VBScript & Windows PowerShell Training - > >> www.ScriptingTraining.com/classes.asp > >> Windows PowerShell? - www.SAPIENPress.com/powershell.asp > >> > >> blog: http://blog.SAPIEN.com > >> blog: http://jdhitsolutions.blogspot.com > >> > > I put alot of the functions I use in my profile so they are always > available. > > -- > Jeffery Hicks > SAPIEN Technologies - Scripting, Simplified. www.SAPIEN.com > VBScript & Windows PowerShell Training - > www.ScriptingTraining.com/classes.asp > Windows PowerShell? - www.SAPIENPress.com/powershell.asp > > blog: http://blog.SAPIEN.com > blog: http://jdhitsolutions.blogspot.com >