tests(correctness): No longer use App::get_matches() in some places
Use `App::get_matches_from(vec![""])` instead not to fail when flags are passed to the test binary
Closes#676
feat(arg_aliases): Ability to alias arguments
There are some cases where you need to have an argument to have an
alias, an example could be when you deprecate one option in favor of
another one.
Now you are going to be able to alias arguments as follows:
```rust
Arg::with_name("opt")
.long("opt")
.short("o")
.takes_value(true)
.alias("invisible")
.visible_alias("visible")
```
Closes#669
Also you can alias flags as follow:
```rust
Arg::with_name("flg")
.long("flag")
.short("f")
.alias("not_visible_flag")
.visible_alias("awesome_v_flag")
```
The new version of rustc 1.14.0-nightly (144af3e97 2016-10-02) has new
linting warnings/errors. This commit fixes them.
Signed-off-by: Salim Afiune <afiune@chef.io>
Added same alias funtionality for flags, now you can do:
```
Arg::with_name("flg")
.long("flag")
.short("f")
.alias("not_visible_flag")
.visible_alias("awesome_v_flag")
```
Signed-off-by: Salim Afiune <afiune@chef.io>
There are some cases where you need to have an argument to have an
alias, an example could be when you depricate one option in favor of
another one.
Now you are going to be able to alias arguments as follows:
```
Arg::with_name("opt")
.long("opt")
.short("o")
.takes_value(true)
.alias("invisible")
.visible_alias("visible")
```
Closes#669
Handle non-ascii names / options in from_usage().
Closes#664 and should make it faster too.
Why aren't the stop_at functions written like `c != a && c != b`?
This should also speeds up the parser (except maybe for short options).
Multi-codepoint characters still can't be used as short options, but people shouldn't non-ASCII options nyway.
Closes#664
Now if one wishes to use value delimiters, they must explicitly set `Arg::use_delimiter(true)` or
`Arg::require_delimiter(true)`. No other methods implicitly set this value.
Closes#666
Previously one could only hide the possible values of an argument application or command wide, and
not on a per argument basis. Now one can use the `Arg::hide_possible_values(bool)` method to hide
only that arguments possible values.
Closes#640
