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adrianmgg/valid_filename_regex.ps1

Created November 30, 2023 19:57
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valid_filename_regex.ps1
# powershell one-liner to generate a regex that rejects filenames containing invalid characters
# NOTE: currently this only handles invalid *characters* - reserved names e.g. COM1 won't be matched by this.
# TODO would be good to handle that too though - either just hardcode it or try one of these
# https://stackoverflow.com/a/70794363/8762161 https://stackoverflow.com/a/54643724/8762161
$valid_filename_pattern = [regex]::new(([System.IO.Path]::GetInvalidFileNameChars() | ForEach-Object {[regex]::Escape($_)} | Join-String -Separator '' -op '^[^' -os ']*$'), 'Compiled, CultureInvariant')
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