create file index manually using powershell, tab delimited - powershell

Question

Sorry in advance for the probably trivial question, I'm a powershell noob, please bear with me and give me advice on how to get better.
I want to achieve a file index index.txt that contains the list of all files in current dir and subdirs in this format:
./dir1/file1.txt 07.05.2020 16:16 1959281
where
dirs listed are relative (i.e. this will be run remotely and to save space, the relative path is good enough)
the delimiter is a tab \t
the date format is day.month.fullyear hours:minutes:seconds, last written (this is the case for me, but I'm guessing this would be different on system setting and should be enforced)
(the last number is the size in bytes)
I almost get there using this command in powershell (maybe that's useful to someone else as well):
get-childitem . -recurse | select fullname,LastWriteTime,Length | Out-File index.txt
with this result
FullName LastWriteTime Length
-------- ------------- ------
C:\Users\user1\Downloads\test\asdf.txt 07.05.2020 16:19:29 1490
C:\Users\user1\Downloads\test\dirtree.txt 07.05.2020 16:08:44 0
C:\Users\user1\Downloads\test\index.txt 07.05.2020 16:29:01 0
C:\Users\user1\Downloads\test\test.txt 07.05.2020 16:01:23 814
C:\Users\user1\Downloads\test\text2.txt 07.05.2020 15:55:45 1346
So the questions that remain are: How to...
get rid of the headers?
enforce this date format?
tab delimit everything?
get control of what newline character is used (\n or \r or both)?

Answer 1

Another approach could be this:
$StartDirectory = Get-Location
Get-ChildItem -Path $StartDirectory -recurse |
Select-Object -Property #{Name='RelPath';Expression={$_.FullName.toString() -replace [REGEX]::Escape($StartDirectory.ToString()),'.'}},
#{Name='LastWriteTime';Expression={$_.LastWriteTime.toString('dd.MM.yyyy HH:mm:ss')}},
Length |
Export-Csv -Path Result.csv -NoTypeInformation -Delimiter "`t"
I recommend to use proper CSV files if you have structured data like this. The resulting CSV file will be saved in the current working directory.

Answer 2

If the path you are running this from is NOT the current scrip path, do:
$path = 'D:\Downloads' # 'X:\SomeFolder\SomeWhere'
Set-Location $path
first.
Next, this ought to do it:
Get-ChildItem . -Recurse -File | ForEach-Object {
"{0}`t{1:dd.MM.yyyy HH:mm}`t{2}" -f ($_ | Resolve-Path -Relative), $_.LastWriteTime, $_.Length
} | Out-File 'index.txt'
On Windows the newline will be \r\n (CRLF)
If you want control over that, this should do:
$newline = "`n" # for example
# capture the lines as string array in variable $lines
$lines = Get-ChildItem . -Recurse -File | ForEach-Object {
"{0}`t{1:dd.MM.yyyy HH:mm}`t{2}" -f ($_ | Resolve-Path -Relative), $_.LastWriteTime, $_.Length
}
# join the array with the chosen newline and save to file
$lines -join $newline | Out-File 'index.txt' -NoNewline
Because your requirement is to NOT have column headers in the output file, I'm using Out-File here instead of Export-Csv