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| _ion | Sigh. | 10:48 |
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| _ion | keybuk: Btw, how about LUA for an alternative to sh in jobs? liblua* are so small that moving them to /lib shouldn't be a problem. | 12:22 |
| _ion | It's a quite nice language. | 12:23 |
| Keybuk | it's a nice syntax, but it's a pain since you have to code every single damned function primitive yourself <g> | 12:24 |
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| _ion | keybuk: Btw, are you familiar with the dovecot library? | 02:18 |
| _ion | keybuk: cvs -d :pserver:anonymous@dovecot.org:/home/cvs co dovecot, see dovecot/src/lib | 02:18 |
| Keybuk | no? | 02:23 |
| Keybuk | I'm familiar with dovecot, obviously | 02:23 |
| Keybuk | most C programs end up acquiring their own "standard library" | 02:25 |
| Keybuk | or they use another like glib wholesale | 02:25 |
| _ion | The library is somewhat similar to e.g. libnih and glib. The interesting thing is the data stack / mempool stuff. | 02:25 |
| _ion | (It's not dovecot-specific, although it has been developed with dovecot. At least icecapd+irssi2 use it in addition to dovecot.) | 02:26 |
| Keybuk | yeah, I do have a long-running nih todo about temporary memory | 02:27 |
| Keybuk | upstart does use it to a small degree (mostly in message processing) | 02:27 |
| Keybuk | I'd somewhat like it to be compatible with nih_alloc though, as being able to steal temporary data is useful | 02:27 |
| === Keybuk has also been a little concerned about the memory usage of nih_alloc | ||
| Keybuk | the overhead for a job definition is quite high | 02:28 |
| Keybuk | I have a vague thought about it though | 02:29 |
| Keybuk | allocations with no parents could have a certain minimum size, say one page | 02:29 |
| Keybuk | if child allocations to those could be fitted into that page, they would | 02:29 |
| Keybuk | I'm not sure how to structure that to reduce overhead though | 02:30 |
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| _ion | keybuk: Jobs need to be able to *programmatically* create new jobs. :-) | 06:13 |
| _ion | A pseudo-code example for the mount job: | 06:13 |
| _ion | start on startup | 06:13 |
| _ion | start ruby # Not that Ruby is ever going to be an Upstart scripting language | 06:13 |
| _ion | # ... | 06:13 |
| _ion | mountpoints.each do |mountpoint| | 06:14 |
| _ion | deps = mountpoint_deps mountpoint | 06:14 |
| _ion | job = Upstart::Job.new "mount-" + mountpoint.sanitize | 06:14 |
| _ion | job.on job.and(deps.map {|dep| "filesystem-mounted " + dep }) | 06:14 |
| _ion | job.start :script, 'mount $1; emit filesystem-mounted $1' | 06:14 |
| _ion | end | 06:14 |
| _ion | end lua | 06:14 |
| _ion | I didn't think about race conditions etc, though. It's just a quick example. | 06:16 |
| _ion | I also forgot to add 'and block-device-added ...' to the 'on' list. | 06:16 |
| Keybuk | start ruby, but end lua ? :p | 06:17 |
| Keybuk | err | 06:17 |
| Keybuk | how is that different from just emitting an event with the requisite details? | 06:17 |
| _ion | Hah. I first wrote 'start lua, end lua' but then thought i'd use ruby instead. Forgot to change the end line. :-) | 06:18 |
| Keybuk | the trouble with trying to define a job like that is ... what happens if the event happens before the job is registered? :p | 06:18 |
| _ion | Yes, filesystem-mounted events must not happen before that's processed. Perhaps make a special pre-startup event for metajobs, and process other job after they have done their thing. | 06:20 |
| _ion | It would seem cleanest if the mount job computed the prerequisite mountpoints instead of the fsck job that emits the event the mount jobs act on. | 06:22 |
| === Keybuk isn't convinced | ||
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| _ion | Another approach: http://soijabanaani.net/tmp/upstart-mount | 07:18 |
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| Lrrr_ | hello, how do I make upstart reread it config files? | 12:01 |
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| _ion | He was in a hurry. | 12:09 |
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