This avoids hacking around the short options of these command line
arguments that have been introduced by clap. Additionally, we test and
correctly handle the combination of both version and help. The GNU
binary will ignore both arguments in this case while clap would perform
the first one. A test for this edge case was added.
Now treats recognized command line options and ignores unrecognized
command line options instead of returning a special exit status for
them.
There is one point of interest, which is related to an implementation
detail in GNU `true`. It may return a non-true exit status (in
particular EXIT_FAIL) if writing the diagnostics of a GNU specific
option fails. For example `true --version > /dev/full` would fail and
have exit status 1.
This behavior was acknowledged in gnu in commit
<9a6a486e6503520fd2581f2d3356b7149f1b225d>. No further
justification provided for keeping this quirk.
POSIX knows no such options, and requires an exit status of 0 in all
cases. We replicate GNU here which is a consistency improvement over the
prior implementation. Adds documentation to clarify the intended
behavior more properly.
Exit with status code 1 for argument parsing errors in `truncate`. When
`clap` encounters an error during argument parsing, it exits with status
code 2. This causes some GNU tests to fail since they expect status code
1.
This allows for `-t` to take invalid unicode (but still single-byte) values
on unix-like platforms. Other platforms, which as of the time of this commit
do not support `OsStr::as_bytes()`, could possibly be supported in the future,
but would require design decisions as to what that means.
Replace the `FilenameFactory` with `FilenameIterator` and calls to
`FilenameFactory::make()` with calls to `FilenameIterator::next()`. We
did not need the fully generality of being able to produce the
filename for an arbitrary chunk index. Instead we need only iterate
over filenames one after another. This allows for a less
mathematically dense algorithm that is easier to understand and
maintain. Furthermore, it can be connected to some familiar concepts
from the representation of numbers as a sequence of digits.
This does not change the behavior of the `split` program, just the
implementation of how filenames are produced.
Co-authored-by: Terts Diepraam <terts.diepraam@gmail.com>
