Mirror a directory of a static web site from one Windows machine to another, using a PowerShell Session instead of CIFS/SMB

mirror-directory.ps1

# Get a handle to the directory.  (This won't be a string, but a filesystem object, so you can do it however you need to.)
# ('gi' is Get-Item)
$dirToPush = gi work\Sunrise\DischargeDisposition\Defect\4960223-2nd-tab-bool-set-activity-not-completed

# Get the full path WITHOUT the drive specifier (i.e., rip off the "C:" part)
$dirToPushNoq = $dirToPush.FullName | split-path -noq

# Start a new PowerShell session (default idle timeout for these things is 2 hours, apparently)
# ('nsn' is New-PSSession)
$vm = nsn NedDevSrvJ6L

# ------------------------------------------  Push entire directory subtree  -------------------------------------------

# (Use if you created a new subdirectory, because the incremental approach below won't work for the new subdirectory.)

# Do the copy
cp $dirToPush (join-path "c:\inetpub\wwwroot" (split-path -parent $dirToPushNoq)) -ToSession $vm  -rec -for -excl "*~"

# OR (if you don't want to manage another variable)...

cp $dirToPush (join-path "c:\inetpub\wwwroot" $($dirToPush.FullName `
                                                | split-path -noq `
                                                | split-path -parent)) `
        -ToSession $vm  -rec -for -excl "*~"

<#
(Explanation of the above command line:
  'join-path' is pretty forgiving, so we don't have to worry about leading slashes.
  We use 'split-path -parent' to rip off the last directory name in the destination, since we're copying the source
    directory by name.
  '-rec -for' is -recursive -force, to overwrite whatever was already there (probably old versions of the files).
  '-excl' specifies a LIST (comma-delimited) of wildcard patterns to be excluded from the copy.  If you only have one
    pattern, you can probably use -filter instead, since that's supposed to be more efficient.  In the case of a
    smallish directory, it probably doesn't make any difference?
#>

# ------------------------------------------------  Incremental update  ------------------------------------------------

# See https://github.com/JohnL4/PowerShell/blob/master/Copy-UpdatedFilesToSessionWwwroot.ps1 before embarking on the below;
# it's an improvement.

# Update w/recent changes; use 'tee' to capture what got sent and display later (because -pass doesn't work on 'cp' cmd
# w/-tosession).  Only ship files, not entire recently-updated directories.

ls $dirToPush -rec `
  | ? {$_.GetType() -eq [IO.FileInfo]} `
  | ? {$_.LastWriteTime -ge (Get-Date).AddMinutes( -60)}  `
  | tee -var sentFiles `
  | cp -dest (join-path "c:\inetpub\wwwroot" $dirToPushNoq) -tosession $vm -rec -for -excl "*~" `
; $sentFiles

# OR (because the above doesn't properly recurse and mirror the entire tree to the destination, if you have a tree)
# (BUT NOTE: if you created a new subdirectory, this trick won't work, because it only works on files)...

pushd (Split-Path $dirToPush -qual)		  # -relative option on Resolve-Path affected by cwd, apparently.

ls $dirToPush -rec `
        | ? {$_.GetType() -eq [IO.FileInfo]} `
        | ? {-not ($_.FullName -match '/\.git/')} `
        | ? {-not ($_.Name -match '~$')} `
        | ? {-not ($_.Name -match '^#.*#$')} `
        | ? {-not ($_.Name -match '^\.#')} `
        | ? {$_.LastWriteTime -ge (Get-Date).AddMinutes( -15)}  `
        | Resolve-Path -relative `
        | tee -var sentFiles `
        | % { cp $_ (join-path "c:\inetpub\wwwroot" $_) -tosession $vm -for -pass}

echo $sentFiles

popd


# Clean up by closing/removing the remote session
# ('rsn' is Remove-PSSession)
# (You can also remove sessions by id)
rsn $vm

# Verify by listing current sessions.  List returned will include ids, so you can clean up by id if you don't have variables any more.
# ('gsn' is Get-PSSession)
gsn

# For a solution using powershell workflow to copy files in parallel, see also: https://stackoverflow.com/a/52139587/370611 

(Looks like it's about twice as fast as CIFS/SMB.)