ArchiveAndCompressFiles tars and gzip-compresses files into a temporary file, returning it along with the resulting size.

source: https://yourbasic.org/golang/formatting-byte-size-to-human-readable-format.

DecompressAndUnarchiveBytes gzip-decompresses and un-tars files into the current working directory and returns the names and decompressed size of the created files.

DisplayWidth calculates what the rendered width of a string may be.

Traverses files and directories (recursively) for total size in bytes.

GeneratePassword generates a random password prefixed with the supplied id.

Truncate shortens a string to fit the maximum display width.

TruncateColumn replaces the first new line character with an ellipsis and shortens a string to fit the maximum display width.

ValidateHostname returns an error if the domain name is not valid source: https://gist.github.com/chmike/d4126a3247a6d9a70922fc0e8b4f4013.

CancelError signals user-initiated cancellation.

SilentError is an error that triggers exit code 1 without any error messaging.

FlagError is the kind of error raised in flag processing.