On Tue, Dec 11, 2012 at 11:14 AM, Patrick Donnelly <batr...@batbytes.com> wrote:
> Sorry I'm late to this party...
> I'm an Nmap developer that is casually interested in git development.
> I've been lurking for a while and thought I'd post my thoughts on this
> On Sun, Nov 25, 2012 at 6:25 AM, Nguyen Thai Ngoc Duy <pclo...@gmail.com>
>>> The most important issues to consider when imagining a future with a
>>> hybrid of code in C and some scripting language "X" are:
>>> * Portability: is "X" available on all platforms targeted by git, in
>>> usable and mutually-compatible versions?
>>> * Startup time: Is the time to start the "X" interpreter prohibitive?
>>> (On my computer, "python -c pass", which starts the Python
>>> interpreter and does nothing, takes about 24ms.) This overhead would
>>> be incurred by every command that is not pure C.
>>> * Should the scripting language access the C functionality only by
>>> calling pure-C executables or by dynamically or statically linking to
>>> a binary module interface? If the former, then the granularity of
>>> interactions between "X" and C is necessarily coarse, and "X" cannot
>>> be used to implement anything but the outermost layer of
>>> functionality. If the latter, then the way would be clear to
>>> implement much more of git in "X" (and lua would also be worth
>>> * Learning curve for developers: how difficult is it for a typical git
>>> developer to become conversant with "X", considering both (1) how
>>> likely is it that the typical git developer already knows "X" and
>>> (2) how straightforward and predictable is the language "X"?
>>> In this category I think that Python has a huge advantage over
>>> Perl, though certainly opinions will differ and Ruby would also be
>>> a contender.
>> * We might also need an embedded language variant, like Jeff's lua
>> experiment. I'd be nice if "X" can also take this role.
> Lua has been an incredible success for Nmap (and other projects).
> As an embedded scripting language, it's unrivaled in terms of ease of
> embedding, ease of use for users, and performance. I would strongly
> recommend the git developers to seriously consider it.
[snipping the rest; all valid points no doubt]
Does lua have os.putenv() yet? The inability to even *set* an env var
before calling something else was a killer for me when I last tried
That may make it fine as an embedded language (called *by* something
else) but it is a bit too "frugal" to use as a glue language (calls
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