On Jan 18, 2007, at 8:31 PM, Ezra Zygmuntowicz wrote:
Hi~
On Jan 18, 2007, at 11:46 AM, Jamis Buck wrote:
Hey Ezra,
I really appreciate the offer. I'm afraid my ideas are still in
the vague/proof-of-concept/experimenting state, but right now
these are the things I know that I want to happen for Capistrano
2.0:
* Decouple the core from the standard recipes. This should slim
the core stuff down quite a bit.
* Decouple the deployment method from the SCM, so you can use any
SCM you want with any supported deployment method (e.g.
"checkout", "export", "copy", "rsync", etc.)
* Get serious about the tests. Right now they're admittedly
weaksauce. My testing-fu is quite challenged by the ssh
requirement. It'd be lovely to have a "mock server" that ships
with Net::SSH, which could be used to do testing with Net::SSH,
but that's a tall order.
I've also been toying with the idea of having a minimal DSL for
writing shell scripts, primarily so that capistrano's default
recipes can work with non-POSIX shells (like csh and tcsh). This
would have the happy side-effect of making it easier to write
simple conditionals in scripts; currently it requires shell-
script- fu as well as a knowledge of how capistrano is going to
mangle the script when it runs it.
So this part sounds pretty fun to me ;) Can you perhaps show me a
few examples of some DSL syntax you would like to see and what
things should be supported?
I actually haven't spent a lot of time thinking about it, but the
little I've sketched out has turned out something like this:
run do |cmd|
cmd.ln_nsf "foo", "bar"
cmd.echo("some string") >> "/path/to/log.txt"
cmd.if(~cmd.directory?("some/dir")) do
cmd.mkdir_p "some/dir"
end
end
The idea is not to mimic every possible aspect of shell scripting--if
people need some esoteric feature, they are more than welcome to drop
down to raw shell script and do it themselves. Ultimately, what I'd
like is for the DSL to be able to do everything that the standard
recipes need to do, as well as the SCM modules, so that a translator
can be written to emit both POSIX shell script, as well as csh/tcsh
compatible scripts.
I'll leave it in your capable hands, Ezra. :) Thanks for the offer to
help!
- Jamis
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