diff options
Diffstat (limited to 'README.dev')
| -rw-r--r-- | README.dev | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/README.dev b/README.dev deleted file mode 100644 index ddc3a88..0000000 --- a/README.dev +++ /dev/null @@ -1,79 +0,0 @@ -Extending BE -============ - -To write a plugin, you simply create a new file in the becommands -directory. Take a look at one of the simpler plugins (e.g. open.py) -for an example of how that looks, and to start getting a feel for the -libbe interface. - -To fit into the current framework, your extension module should -provide the following elements: - __desc__ - A short string describing the purpose of your plugin - execute(args) - The entry function for your plugin. args is everything from - sys.argv after the name of your plugin (e.g. for the command - `be open abc', args=['abc']). - - Note: be supports command-completion. To avoid raising errors you - need to deal with possible '--complete' options and arguments. - See the 'Command completion' section below for more information. - help() - Return the string to be output by `be help <yourplugin>', - `be <yourplugin> --help', etc. - -While that's all that's strictly necessary, many plugins (all the -current ones) use libbe.cmdutil.CmdOptionParser to provide a -consistent interface - get_parser() - Return an instance of CmdOptionParser("<usage string>"). You can - alter the parser (e.g. add some more options) before returning it. - -Again, you can just browse around in becommands to get a feel for things. - - -Testing -------- - -Run any doctests in your plugin with - be$ python test.py <yourplugin> -for example - be$ python test.py merge - - -Command completion ------------------- - -BE implements a general framework to make it easy to support command -completion for arbitrary plugins. In order to support this system, -all becommands should properly handle the '--complete' commandline -argument, returning a list of possible completions. For example - $ be --commands - lists options accepted by be and the names of all available becommands. - $ be list --commands - lists options accepted by becommand/list - $ be list --status --commands - lists arguments accepted by the becommand/list --status option - $ be show -- --commands - lists possible vals for the first positional argument of becommand/show -This is a lot of information, but command-line completion is really -convenient for the user. See becommand/list.py and becommand/show.py -for example implementations. The basic idea is to raise - cmdutil.GetCompletions(['list','of','possible','completions']) -once you've determined what that list should be. - -However, command completion is not critical. The first priority is to -implement the target functionality, with fancy shell sugar coming -later. In recognition of this, cmdutil provides the default_complete -function which ensures that if '--complete' is any one of the -arguments, options, or option-arguments, GetCompletions will be raised -with and empty list. - -Profiling -========= - -Find out which 20 calls take the most cumulative time (time of -execution + childrens' times). - - $ python -m cProfile -o profile be [command] [args] - $ python -c "import pstats; p=pstats.Stats('profile'); p.sort_stats('cumulative').print_stats(20)" |