Re: gitpacker progress report and a question

From: Eric S. Raymond <esr@thyrsus.com>
Date: Nov 26, 2012, 23:43 UTC
Message-ID: <20121126234359.GA8042@thyrsus.com>
In-Reply-To: <CAMP44s2+NDyL2Vf=iKR09f-YUnp=G2BCiYj-+qKuP7JA-+YkmQ@mail.gmail.com>

Felipe Contreras <felipe.contreras@gmail.com>:

> Might be easier to just call 'git ls-files --with-three foo', but I
> don't see the point of those calls:

Ah, much is now explained. You were looking at an old version. I had in fact already fixed the subdirectories bug (I've updated my regression test to check) and have full support for branchy repos, preserving tags and branch heads.

Show 5 quoted lines

> > It doesn't issue delete ops.
> 
> What do you mean?
> 
>     out.puts 'deleteall' <- All current files are removed

Yours emits no D ops for files removed after a particular snapshot.

Show 7 quoted lines

> > Be aware, however, that I consider easy editability by human beings
> > much more important than squeezing the last microsecond out of the
> > processing time.  So, for example, I won't use data byte counts rather
> > than end delimiters, the way import streams do.
> 
> Well, if there's a line with a single dot in the commit message ('.'),
> things would go very bad.

Apparently you missed the part where I byte-stuffed the message content.
It's a technique used in a lot of old-school Internet protocols, notably
in SMTP.

> Personally I would prefer something like this:

There's a certain elegance to that, but it would be hard to generate by hand.

Remember that a major use case for this tool is making repositories from projects whose back history exists only as tarballs. So, let's say you have the following:

foo-1.1.tar.gz foo-1.2.tar.gz foo-1.3.tar.gz

What you're going to do before weaving is drop the untarred file trees in a 'foo' scratch directory, then hand-craft a log file that might look a bit like this:

----------------------------------- commit 1 directory foo-1.1

Release 1.1 of project foo . commit 2 directory foo-1.2

..This is an example of a byte-stuffed line.

Release 1.2 of project foo . commit 3 directory foo-1.3

Release 1.3 of project foo . -----------------------------------

The main objective of the logfile design is to make hand-crafting these easy.

-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>