[powershell] How can I get the current PowerShell executing file?

Note: PowerShell 1.0
I'd like to get the current executing PowerShell file name. That is, if I start my session like this:

powershell.exe .\myfile.ps1

I'd like to get the string ".\myfile.ps1" (or something like that). EDIT: "myfile.ps1" is preferable.
Any ideas?

beware: Unlike the $PSScriptRoot and $PSCommandPath automatic variables, the PSScriptRoot and PSCommandPath properties of the $MyInvocation automatic variable contain information about the invoker or calling script, not the current script.

e.g.

PS C:\Users\S_ms\OneDrive\Documents> C:\Users\SP_ms\OneDrive\Documents\DPM ...
=!C:\Users\S_ms\OneDrive\Documents\DPM.ps1

...where DPM.ps1 contains

Write-Host ("="+($MyInvocation.PSCommandPath)+"!"+$PSCommandPath)

Did some testing with the following script, on both PS 2 and PS 4 and had the same result. I hope this helps people.

$PSVersionTable.PSVersion
function PSscript {
  $PSscript = Get-Item $MyInvocation.ScriptName
  Return $PSscript
}
""
$PSscript = PSscript
$PSscript.FullName
$PSscript.Name
$PSscript.BaseName
$PSscript.Extension
$PSscript.DirectoryName

""
$PSscript = Get-Item $MyInvocation.InvocationName
$PSscript.FullName
$PSscript.Name
$PSscript.BaseName
$PSscript.Extension
$PSscript.DirectoryName

Results -

Major  Minor  Build  Revision
-----  -----  -----  --------
4      0      -1     -1      

C:\PSscripts\Untitled1.ps1
Untitled1.ps1
Untitled1
.ps1
C:\PSscripts

C:\PSscripts\Untitled1.ps1
Untitled1.ps1
Untitled1
.ps1
C:\PSscripts

If you only want the filename (not the full path) use this:

$ScriptName = $MyInvocation.MyCommand.Name

I would argue that there is a better method, by setting the scope of the variable $MyInvocation.MyCommand.Path:

ex> $script:MyInvocation.MyCommand.Name

This method works in all circumstances of invocation:

EX: Somescript.ps1

function printme () {
    "In function:"
    ( "MyInvocation.ScriptName: " + [string]($MyInvocation.ScriptName) )
    ( "script:MyInvocation.MyCommand.Name: " + [string]($script:MyInvocation.MyCommand.Name) )
    ( "MyInvocation.MyCommand.Name: " + [string]($MyInvocation.MyCommand.Name) )
}
"Main:"
( "MyInvocation.ScriptName: " + [string]($MyInvocation.ScriptName) )
( "script:MyInvocation.MyCommand.Name: " + [string]($script:MyInvocation.MyCommand.Name) )
( "MyInvocation.MyCommand.Name: " + [string]($MyInvocation.MyCommand.Name) )
" "
printme
exit

OUTPUT:

PS> powershell C:\temp\test.ps1
Main:
MyInvocation.ScriptName:
script:MyInvocation.MyCommand.Name: test.ps1
MyInvocation.MyCommand.Name: test.ps1

In function:
MyInvocation.ScriptName: C:\temp\test.ps1
script:MyInvocation.MyCommand.Name: test.ps1
MyInvocation.MyCommand.Name: printme

Notice how the above accepted answer does NOT return a value when called from Main. Also, note that the above accepted answer returns the full path when the question requested the script name only. The scoped variable works in all places.

Also, if you did want the full path, then you would just call:

$script:MyInvocation.MyCommand.Path

If you are looking for the current directory in which the script is being executed, you can try this one:

$fullPathIncFileName = $MyInvocation.MyCommand.Definition
$currentScriptName = $MyInvocation.MyCommand.Name
$currentExecutingPath = $fullPathIncFileName.Replace($currentScriptName, "")

Write-Host $currentExecutingPath

Try the following

$path =  $MyInvocation.MyCommand.Definition 

This may not give you the actual path typed in but it will give you a valid path to the file.

While the current Answer is right in most cases, there are certain situations that it will not give you the correct answer. If you use inside your script functions then:

$MyInvocation.MyCommand.Name 

Returns the name of the function instead name of the name of the script.

function test {
    $MyInvocation.MyCommand.Name
}

Will give you "test" no matter how your script is named. The right command for getting the script name is always

$MyInvocation.ScriptName

this returns the full path of the script you are executing. If you need just the script filename than this code should help you:

split-path $MyInvocation.PSCommandPath -Leaf

This can works on most powershell versions:

(& { $MyInvocation.ScriptName; })

This can work for Scheduled Job

Get-ScheduledJob |? Name -Match 'JOBNAMETAG' |% Command

A short demonstration of @gregmac's (excellent and detailed) answer, which essentially recommends $PSCommandPath as the only reliable command to return the currently running script where Powershell 3.0 and above is used.

Here I show returning either the full path or just the file name.

Test.ps1:

'Direct:'
$PSCommandPath  # Full Path 
Split-Path -Path $PSCommandPath -Leaf  # File Name only

function main () {
  ''
  'Within a function:'
  $PSCommandPath
  Split-Path -Path $PSCommandPath -Leaf
}

main

Output:

PS> .\Test.ps1
Direct:
C:\Users\John\Documents\Sda\Code\Windows\PowerShell\Apps\xBankStatementRename\Test.ps1
Test.ps1

Within a function:
C:\Users\John\Documents\Sda\Code\Windows\PowerShell\Apps\xBankStatementRename\Test.ps1
Test.ps1

As noted in previous responses, using "$MyInvocation" is subject to scoping issues and doesn't necessarily provide consistent data (return value vs. direct access value). I've found that the "cleanest" (most consistent) method for getting script info like script path, name, parms, command line, etc. regardless of scope (in main or subsequent/nested function calls) is to use "Get-Variable" on "MyInvocation"...

# Get the MyInvocation variable at script level
# Can be done anywhere within a script
$ScriptInvocation = (Get-Variable MyInvocation -Scope Script).Value

# Get the full path to the script
$ScriptPath = $ScriptInvocation.MyCommand.Path

# Get the directory of the script
$ScriptDirectory = Split-Path $ScriptPath

# Get the script name
# Yes, could get via Split-Path, but this is "simpler" since this is the default return value
$ScriptName = $ScriptInvocation.MyCommand.Name

# Get the invocation path (relative to $PWD)
# @GregMac, this addresses your second point
$InvocationPath = ScriptInvocation.InvocationName

So, you can get the same info as $PSCommandPath, but a whole lot more in the deal. Not sure, but it looks like "Get-Variable" was not available until PS3 so not a lot of help for really old (not updated) systems.

There are also some interesting aspects when using "-Scope" as you can backtrack to get the names, etc. of the calling function(s). 0=current, 1=parent, etc.

Hope this is somewhat helpful.

Ref, https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/get-variable