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Finish "Deferred Operation" section in manual.

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Adam Spiers 2011-11-17 15:22:58 +00:00
parent 85f1f8619c
commit cb86578b87
2 changed files with 12 additions and 8 deletions
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1
TODO
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@ -26,7 +26,6 @@
*** Add documentation about conflict resolution *** Add documentation about conflict resolution
* Make CPAN-friendly via Module::Build * Make CPAN-friendly via Module::Build
*** Include test-time dependencies on Test::More and Test::Output *** Include test-time dependencies on Test::More and Test::Output
* Finish 'Deferring' section of manual
* get account on fencepost.gnu.org (email accounts@gnu.org) * get account on fencepost.gnu.org (email accounts@gnu.org)
set up copyright papers? set up copyright papers?
'assign.future' and 'request-assign.future.manual' 'assign.future' and 'request-assign.future.manual'

19
stow.texi
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@ -554,17 +554,21 @@ un-populatable symlink.
For complex packages, scanning the stow and target trees in tandem, and For complex packages, scanning the stow and target trees in tandem, and
deciding whether to make directories or links, split-open or fold directories, deciding whether to make directories or links, split-open or fold directories,
can actually take a long time (a number of seconds). Moreover, an accurate can actually take a long time (a number of seconds). Moreover, an accurate
analysis of potential conflicts, requires us to take in to account all of analysis of potential conflicts requires us to take into account all of
these operations. these operations.
Accidentally stowing a package that will result in a conflict ... Since version 2.0, Stow now adopts a two-phase algorithm, first scanning
FIXME - doesn't look like this section was ever finished. for any potential conflicts before any stowing or unstowing operations
are performed. This means that there is much less risk of a package
being partially stowed or unstowed due to conflicts. Prior to version
2.0, if a conflict was discovered, the stow or unstow operation could be
aborted mid-flow, leaving the target tree in an inconsistent state.
@c =========================================================================== @c ===========================================================================
@node Mixing Operations, Multiple Stow Directories, Deferred Operation, Top @node Mixing Operations, Multiple Stow Directories, Deferred Operation, Top
@chapter Mixing Operations @chapter Mixing Operations
Since Version 2.0, multiple distinct actions can be specified in a single Since version 2.0, multiple distinct actions can be specified in a single
invocation of GNU Stow. For example, to update an installation of Emacs from invocation of GNU Stow. For example, to update an installation of Emacs from
version 21.3 to 21.4a you can now do the following: version 21.3 to 21.4a you can now do the following:
@ -576,9 +580,10 @@ stow -D emacs-21.3 -S emacs-21.4a
which will replace emacs-21.3 with emacs-21.4a using a single invocation. which will replace emacs-21.3 with emacs-21.4a using a single invocation.
This is much faster and cleaner than performing two separate invocations of This is much faster and cleaner than performing two separate invocations of
stow, because redundant folding/unfolding operations can be factored out. stow, because redundant folding/unfolding operations can be factored out. In
In addition, all the operations are calculated and merged before being executed addition, all the operations are calculated and merged before being executed
@pxref{Deferred Operation}, so the amount of of time in which GNU Emacs is unavailable is minimised. @pxref{Deferred Operation}, so the amount of of time in which GNU Emacs is
unavailable is minimised.
You can mix and match any number of actions, for example, You can mix and match any number of actions, for example,