IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 2 June 2019 (all times are UTC)
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| 18:53 | <alkisg> I'm thinking to promote all our conf files to "shell sourceable, that MAY have [sections]"
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| 18:53 | So for example /etc/ltsp/ltsp.conf may have just: BASE_DIR=/opt/ltsp
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| 18:53 | while /etc/ltsp/image.conf may have (with newlines inbetween): [buster-gnome] PARTITION=1 [bionic-mate] PARTITION=2 SQUASHFS_OPTIONS="no compression etc"
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| 18:53 | That would mean that the new lts.conf, now called /etc/ltsp/client.conf, should be case sensitive, and not allow spaces around =
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| 18:54 | Globs are supported in all sections, interpreted with shell's "case" command
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| 18:54 | <vagrantc> by shell-sourceable, you mean individual lines, as the [] will evaluate in shell
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| 18:55 | ?
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| 18:55 | <alkisg> The [sections] get translated to shell functions by an awk script
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| 18:55 | [name] ==> section_name() {
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| 18:55 | <vagrantc> ok, so the file itself isn't sourceable
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| 18:56 | <alkisg> No; it needs to be: eval "$(ini2sh.awk < file.conf)"
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| 18:57 | example conf: https://termbin.com/7p4x ==> converted to shell: https://termbin.com/v35r
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| 18:57 | <vagrantc> i could see end-users getting some really surprising and hard to debug syntax errors with a few small typos
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| 18:57 | <alkisg> I run `sh -n file.conf` on all files
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| 18:57 | <vagrantc> not that we're immune to that now
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| 18:57 | <alkisg> So they'll get the appropriate error messages
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| 18:58 | Note the generated section_call() { in that second link
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| 18:58 | <vagrantc> sh -n only catches so many things
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| 18:58 | <alkisg> True; but they're supposed to be simple anyway; it catches more than getltscfg
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| 18:58 | So, all sections support globs, as they're translated to shell's case
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| 18:59 | A deliberate side effect is that advanced users can embed code in configuration files, if and when it makes sense
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| 19:00 | <vagrantc> whoah, the functions self-destruct! :)
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| 19:00 | <alkisg> No it's to avoid infinite recursion
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| 19:00 | Like .c #define __file__ / #undef __file__ lines
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| 19:01 | So if LIKE=section1 then LIKEs=section2, it won't loop forever
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| 19:02 | <vagrantc> i kind of like the overall idea, but a little hesitant to give it a full tumbs-up ...
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| 19:02 | thumbs
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| 19:04 | <quinox> it's better than inventing your own dynamic configuration language :)
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| 19:05 | <vagrantc> alkisg: what's the "line directive ..." stuff?
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| 19:07 | <alkisg> just testing that = works as expected, i.e. not a directive there but a command
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| 19:09 | ah sorry, that's a multiline variable
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| 19:09 | e.g. a complete fstab_x= with 2 lines
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