Re: Usability question

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On Thu, 2009-09-17 at 20:01 +1000, Rob Barrett wrote:
> When starting with git people almost always ask some variant of "how
> do I know whether this option should be prefixed with dashes or not?"
> i.e. git reset --hard vs. git stash save --patch, which coupled with
> other path, sha and treeish args make things a bit more confusing.
> 
> Not sure if this has been discussed before? If it has point me at the
> discussion and I'll go look at it -- no need to read further.
> 
> And people stop asking the question after they get used to git - but
> that's not the same as being usable.
> 
> Out of 60+ commands, most take the form
> git <subcommand> [--option]
> and a few take the form
> git <subcommand> subsubcommand [--option]
> 
> (a quick scan gives: bisect,bundle,reflog,remote,stash)
> 
> My questions:
> 1. What is the distinction that makes the 10% special enough to get
> non-prefixed options?
> 2. Is it worthwhile? Wouldn't it be better if to shoot for more
> consistency / less complexity?

I don't think anybody is going to say that it all makes perfect sense. 
One pattern is:

 git <verb>

vs.

 git <subsystem> <verb>  (gui, svn, ...)
 git <noun> <verb>       (bundle, remote, stash, submodule, ...)

Another pattern is that options don't change the verb, they just 
modify it. 

But it's easy to find exceptions:

 git tag -l
 git branch --contains <commit>
 git am --abort

I personally think it would help consistency to use the subsubcommand
pattern more and treat 'git tag <tag>' as an shorthand. If you really
want to to create a tag called 'list', you'd need to use
'git tag tag list', or maybe 'git tag -- list'.

Even with compat support for options and a general agreement that I
doubt exists, that's at best a 95% compatible change, so it's unlikely
to happen soon.

- Owen


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