powershell - Variable reference is not valid. ':' was not followed by a valid variable name character

Question

what im trying do to, is get radarr to delete the movie requested from the web client after it moves it to the persons folder so if default path is D:\Movies\ then just log it, if it goes any where else other then D:\Movies\ then it will remove it from the Client.

looking for some guidance as i am completely new to powershell.

$movie_path = $env:radarr_moviefile_relativepath
$default_path = "D:\Movies\"

$RADARRIP="localhost"
$RADARRPORT="7878"
$RADARRAPIKEY="******"

$Logfile = "C:\Custom Scripts\Radarr.log"

Function LogWrite
{
   Param ([string]$logstring)

   Add-content $Logfile -value $logstring
}

if ($default_path == $movie_path)
{
LogWrite $movie_path $radarr_movie_id "added to server"
LogWrite " "
}
else
{
Invoke-WebRequest -Uri http://$RADARRIP:$RADARRPORT/api/movie/$radarr_movie_id" -X GET -H "X-Api-Key: $RADARRAPIKEY -k
LogWrite $movie_path $radarr_movie_id "added to server"
LogWrite $radarr_movie_id "selected movie from server"
Invoke-WebRequest -Uri http://$RADARRIP:$RADARRPORT/api/movie/$radarr_movie_id" -X DELETE -H "X-Api-Key: $RADARRAPIKEY -k
LogWrite $radarr_movie_id "movie removed from list"
LogWrite " "
}

Errors

+ Invoke-WebRequest -Uri http://$RADARRIP:$RADARRPORT/api/movie/$radarr ...
+                               ~~~~~~~~~~
Variable reference is not valid. ':' was not followed by a valid variable name character. Consider using ${} to delimit the name.
At \\WIN-TQS12RTGKSQ\Custom Scripts\radarr.ps1:29 char:31
+ Invoke-WebRequest -Uri http://$RADARRIP:$RADARRPORT/api/movie/$radarr ...
+                               ~~~~~~~~~~
Variable reference is not valid. ':' was not followed by a valid variable name character. Consider using ${} to delimit the name.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : InvalidVariableReferenceWithDrive

Answer 1

tl;dr

• Replace $RADARRIP:$RADARRPORT with ${RADARRIP}:$RADARRPORT (or ${RADARRIP}:${RADARRPORT}

• Placing {...} around a variable name disambiguates it from surrounding characters, which is necessary here because : would be considered part of the name.

---

When you use an unquoted compound string as a command argument, PowerShell implicitly treats it as an expandable string, i.e. as if it had been passed enclosed in double quotes ("...")

This answer provides a comprehensive overview of expandable strings (string interpolation) in PowerShell.

The relevant aspect is that a : following a variable reference such as $RADARRIP is considered part of that variable reference: the part between $ and : is considered the name of a (PowerShell) drive, and what follows the : is expected to be the name or path of an item in that drive; that is, the variable reference is interpreted as an instance of PowerShell's namespace variable notation.

Therefore, PowerShell must explicitly be told that the : following $RADARRIP is not part of the variable reference, for which you have several options:

• The most PowerShell-idiomatic option is to use {...} to delineate the variable name:

Invoke-WebRequest -Uri http://${RADARRIP}:$RADARRPORT/api/movie/$radarr_movie_id ...

• Alternatively, use `, PowerShell's escape character, to escape the : in order to treat it as a literal, but note that this approach can fail with certain characters other than :, e.g., a, because `-escaping them could accidentally turn them into an escape sequence :

Invoke-WebRequest -Uri http://$RADARRIP`:$RADARRPORT/api/movie/$radarr_movie_id ...

• Finally, quoting : selectively works too; however, note that such compound strings only work if the first component is unquoted (see this answer):

Invoke-WebRequest -Uri http://$RADARRIP':'$RADARRPORT/api/movie/$radarr_movie_id ...

---

Answer 2

If you are using anaconda, this worked for me:

conda install -c conda-forge cudatoolkit=11.2 cudnn=8.1.0 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$CONDA_PREFIX/lib/ python3 -m pip install tensorflow

Verify install:

python3 -c "import tensorflow as tf; print(tf.config.list_physical_devices('GPU'))"

Visit: https://www.tensorflow.org/install/pip#windows-wsl2

Answer 3

No errors, Completed had to simplify it

$movie_path = $env:radarr_movie_path
$movie_id = $env:radarr_movie_id
$movie_name = $env:radarr_movie_title

function Get-TimeStamp {

    return "[{0:MM/dd/yy} {0:HH:mm:ss}]" -f (Get-Date)

}

Function LogWrite
{
   Param ([string]$logstring)

   Add-content $Logfile -value $logstring
}

$Logfile = "C:\Custom Scripts\Radarr.log"


if ($movie_path.contains("D:\Movies\"))
{
LogWrite "$(Get-TimeStamp) | $movie_path | $movie_id | added to server"
}
else
{
Invoke-WebRequest -Uri http://127.0.0.1:7878/api/movie/"$movie_id"?apikey=YourAPIkey -Method Delete
LogWrite "$(Get-TimeStamp) | $movie_path | $movie_id | $movie_name | movie removed from list"
}