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.
- Change the main! proc_macro to a bin! macro_rules macro.
- Reexport uucore_procs from uucore
- Make utils to not import uucore_procs directly
- Remove the `syn` dependency and don't parse proc_macro input (hopefully for faster compile times)
This makes clap wrap the help text according to the terminal width,
which improves readability for terminal widths < 120 chars,
because clap defaults to a width of 120 chars without this feature.
- refactor internal version specifications to be ">=M.m.p" (where M.m.p is *already published*)
## [why]
Loosening internal version dependencies decreases the coupling between packages such
that packages can be published in a looser order. It allows the packages to be version
updated and published in tandem (ie, by using `cargo workspace ...`). Once published,
the internal versions can then be updated (again, to an *already published* package
version), as needed.
