powershell compress files within subfolder and over certain age - powershell

Question

I have been looking around for several hours on this issue. I am looking for some help to fix this script. The Script is to search the shared folder for files in sub-folders and zip the folder up in that sub folder. What I need to also do is add the last access time of the files or folder so I can set an age to it such as 1 year or 365 days. Then 7z would remove the file after compression saving space on the server for other things.
So c:\share
c:\share\folder1
c:\share\folder2
c:\share\folder3
etc...
the script in my testing is like this
<#
.SYNOPSIS
<A brief description of the script>
.DESCRIPTION
<A detailed description of the script>
.PARAMETER <paramName>
<Description of script parameter>
.EXAMPLE
<An example of using the script>
#>
#Compress all the files based on your folder structure
Set-Location -Path 'c:\shared'
Get-ChildItem -Path 'c:\shared' -Recurse | Where-Object {$_.PSIsContainer } | ForEach-Object {
$directoryFullName = $_.FullName
$directoryName = $_.Name
Invoke-Expression -Command 'C:\7-Zip\7z.exe a "-x!*.zip" -sdel $directoryFullName\$directoryName.zip $directoryFullName\*'
}
I am trying this below but getting an error I do not understand yet as to formatting property.
<#
.SYNOPSIS
<A brief description of the script>
.DESCRIPTION
<A detailed description of the script>
.PARAMETER <paramName>
<Description of script parameter>
.EXAMPLE
<An example of using the script>
#>
#Compress all the files based on your folder structure
Set-Location -Path 'c:\shared'
Get-ChildItem -Path 'c:\shared' -Recurse | Where-Object {$_.PSIsContainer $_.LastWriteTime -gt "01-01-1900" -and $_.LastWriteTime -lt (get-date).AddDays(-365) } | ForEach-Object {
$directoryFullName = $_.FullName
$directoryName = $_.Name
Invoke-Expression -Command 'C:\7-Zip\7z.exe a "-x!*.zip" -sdel $directoryFullName\$directoryName.zip $directoryFullName\*'
}
here is the error
At C:\Users\HarrelsonNetworks\Documents\windowspowershell\Scripts\testbackup3.ps1:14 char:75
+ ... Path 'c:\shared' -Recurse | Where-Object {$_.PSIsContainer $_.LastWri ...
+ ~~
Unexpected token '$_' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParseException
FullyQualifiedErrorId : UnexpectedToken
thanks
for your help
jharl

Answer 1

I would suggest the following: 1. Create a temp folder 2. MOVE (not copy) everything you want over to the temp folder 3. Zip the temp forder and save to desired location 3. delete the temp folder.
Breaking it out into steps like this will let you work through the problem better.
Here is something similar I wrote recently, it doesn't solve your problem but it should point you in the right direction:
function archiveLogs ( [string]$OriginalLocation, [string]$NewLocation ){
## Age of files to be archived
$DeleteOlderThan = 30
# Create temp folder to store files to be archived
New-Item c:\Temp\_tempfolder -type directory
# Get all children of specific directory older than 'X' days and of ".log" file type and move to temp folder
get-childitem -Path $OriginalLocation\*.log |
where-object {$_.LastWriteTime -lt (get-date).AddDays(-$DeleteOlderThan)} |
move-item -destination "C:\Temp\_tempfolder"
## Zip all .log files in temp folder and save to '$NewLocation\(DATE)_Archive'
& "C:\temp\7za.exe" a -tzip $NewLocation\$((Get-Date).ToString('yyyy-MM-dd HH-mm'))_Archive -r c:\Temp\_tempfolder\*.log
## Delete temp folder
Remove-Item c:\temp\_tempfolder -recurse -ErrorAction SilentlyContinue
Goodluck and let me know if you have any questions.

Answer 2

You're missing the logical operator -and. To resolve the error, change:
{$_.PSIsContainer $_.LastWriteTime -gt "01-01-1900" -and $_.LastWriteTime -lt (get-date).AddDays(-365) }
To:
{$_.PSIsContainer -and ($_.LastWriteTime -gt "01-01-1900") -and ($_.LastWriteTime -lt (get-date).AddDays(-365)) }