Migrate from oof to clap

[SpyrosRoum]

It's a single commit with many changes, sorry about that but I wasn't sure how to break it down.
Here are the help messages for reference:

$ ouch --help
ouch 0.2.0

Vinícius Rodrigues Miguel <vrmiguel99@gmail.com>:João M. Bezerra <marcospb19@hotmail.com>

A command-line utility for easily compressing and decompressing files and directories.

USAGE:
    ouch [OPTIONS] <SUBCOMMAND>

OPTIONS:
    -h, --help       Print help information
    -n, --no         Skip overwrite questions negatively
    -V, --version    Print version information
    -y, --yes        Skip overwrite questions positively

SUBCOMMANDS:
    compress      Compress files.    Alias: c
    decompress    Compress files.    Alias: d
    help          Print this message or the help of the given subcommand(s)

$ ouch c --help
ouch-compress 

Compress files.    Alias: c

USAGE:
    ouch compress <FILES>... <OUTPUT>

ARGS:
    <FILES>...    Files to be compressed
    <OUTPUT>      The resulting file. Its extensions specify how the files will be compressed
                  and they need to be supported

OPTIONS:
    -h, --help    Print help information

$ ouch d --help
ouch-decompress 

Compress files.    Alias: d

USAGE:
    ouch decompress [OPTIONS] <FILES>...

ARGS:
    <FILES>...    Files to be decompressed

OPTIONS:
    -h, --help               Print help information
    -o, --output <OUTPUT>    Decompress files in a directory other than the current

This closes #105

[SpyrosRoum]

Oh I forgot to update the tests..

[figsoda]

I can help adding completions and help2man man pages once this gets merged

[SpyrosRoum]

Clap also has clap_generate which can be used but I'm not really sure what the best practices are

[figsoda]

Yes that's what I meant to use, with a build.rs

[marcospb19]

Can't believe I just took a nap and this is already done.

It's a single commit with many changes, sorry about that but I wasn't sure how to break it down.

No problem! The small changes in src/cli.rs break everything anyway, so it's almost impossible to break it down during the process.

It's awesome, thanks for the effort, ouch has improved a ton since you guys started helping.

It's a +272 −855 change commit, and I did not found any errors, I'll pass the review to @vrmiguel, see if he has any comments about it.

[SpyrosRoum]

Remembering all the different commands to compress and decompress all the different formats can be a huge pain and ouch is the first project I've seen that address this issue on the cli so I really want to help make it as good as possible

[marcospb19]

I'm glad we feel the same about it :D.

[marcospb19]

Ok, I found a problem:

Vinícius Rodrigues Miguel <vrmiguel99@gmail.com>:João M. Bezerra <marcospb19@hotmail.com>

I hate seeing our names stand out in the --help message (it gives no "help") maybe we should instead have the link https://github.com/ouch-org/ouch at the end or beginning. It would be more useful.

Later we can consider adding it to the man pages, if necessary, @vrmiguel you agree on replacing it by the repository link?

[figsoda]

Also iirc required = true are not needed

[SpyrosRoum]

Also iirc required = true are not needed

I believe you are correct but I wonted to be explicit since it's only a couple of times anyway

[figsoda]

this also creates another problem: clap uses atty and termcolor for NO_COLOR detection, which could cause inconsistencies with the current implementation

[marcospb19]

@figsoda you mean like, if one is detected and the other is not? (like ouch detects it and clap does not?).

[figsoda]

yes

[marcospb19]

Status update, pending:

• Review from @vrmiguel.
• Check if clap implementation for NO_COLOR detection is roughly compatible with ours.

[vrmiguel]

Seems great! Thanks!

I like our current help message better than the one clap gives us but I believe we can improve it later on using some template