[RFC] New feature: --batch to accept command sequences from stdin (or file)

[Aaron Bentley]

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Jari Aalto+mail.perl wrote:
> bzr startup time, as for all interpreted languages (Perl, Python ...)
> is quite constly. Especially under Win32/Cygwin it takes 3-5 seconds
> before simple "bzr ci" is run under old hardware.

We're working on reducing the startup time so that it's comparable with
Hg's.  That's what the recent discussion of "demandload" and "profiling
imports" was about.  One of the reasons for the new "dirstate" format is
to avoid having to import ElementTree.

> It would be nice if bzr somehow accepted commands to run from 
> stdin, from file or command line. Something like:

There is already the "bzr serve" plugin.  See also the "bzr shell"
command in bzrtools, for interactive use.

Aaron
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