CODEWITHSUNDEEP
powershell
NeilD
NeilD

Reputation: 2298

How do I build a list of parameters for an executable in Powershell?

I have a snippet of Powershell where I need to call an external executable, with a list of switches. 

& $pathToExe 
        --project $project `
        --server $server `
        --apiKey $key `

Now I need to do something like "if $someVariable -eq $True then also add --optionalSwitch $someValue".

How can I do this without a load of repetition? For reference the real exe call is much bigger than this, and the list of optional switches is larger!

Upvotes: 1

Views: 43

Answers (1)

vonPryz
vonPryz

Reputation: 24081

How about a hashtable that contains parameters and their values? Like so,

$ht = @{}
$ht.Add('project', 'myProject') 
$ht.Add('apikey', $null) 
$ht.Add('server', 'myServer')

To build the parameter string, filter the collection by excluding keys without values:

$pop = $ht.getenumerator() | ? { $_.value -ne $null }

Build the command string by iterating the filtered collection

$cmdLine = "myExe"
$pop | % { $cmdLine += " --" + $_.name + " " + $_.value }
# Check the result
$cmdLine
myExe --server myServer --project myProject

Upvotes: 3

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