IRC logs for #openttd on OFTC at 2022-06-13
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06:55:19 <andythenorth> hmm, how to pass a list as shell args?
06:55:38 <andythenorth> e.g. `my.sh foo=ham,eggs`
06:55:54 <andythenorth> just split on some delimiter?
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17:37:22 <andythenorth> so I need to generate 3 grfs from one compile
17:38:29 <TrueBrain> Who is stopping you? :)
17:38:59 <andythenorth> andythenorth is stopping me
17:49:26 <andythenorth> is there an established way to parse a list of items from a shell arg?
17:49:32 <andythenorth> google didn't find much
17:58:26 <andythenorth> to put it another way, I want to give make an arg
17:58:45 <andythenorth> which will compile any of grf 1, 2, 3, in any combination :P
17:59:28 <andythenorth> I did wonder if I should be using named targets for each grf
17:59:37 * andythenorth clueless about make
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20:41:54 * andythenorth reading about conditional makefiles
20:41:57 <andythenorth> are these wise? :P
20:46:42 * andythenorth found 'foreach' also
20:48:37 <andythenorth> or I could just do it all in python :|
20:48:56 <andythenorth> I have no idea how to set up conditional deps or targets
20:49:00 <LordAro> andythenorth: generally at the point you reach foreach you should write it in something else
20:49:21 <andythenorth> so it's more like noreach :P
20:55:56 * andythenorth piles in blindly to make something work :P
20:58:30 <andythenorth> I think it's going to be near impossible to conditionally generate 3 grfs from one compile
21:03:41 * andythenorth reading a makefile tutorial
21:04:39 <andythenorth> targets are filenames?
21:05:09 <LordAro> targets are filenames
21:05:15 <LordAro> targets depend on other targets
21:05:26 <andythenorth> but they're only actually filenames if the rule actually writes a file?
21:05:35 <andythenorth> otherwise they're a bit phony?
21:05:46 <andythenorth> mind blown, but also
21:05:51 <andythenorth> that might finally make sense
21:05:56 <andythenorth> I assumed make was just magic
21:06:06 <LordAro> well, make still treats them as filenames, just that the target never actually gets created, so it always runs
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21:06:34 <LordAro> (.PHONY changes the behaviour of such targets to ensure that it *always* treats the rule as if the file doesn't exist, iirc)
21:06:36 <andythenorth> only took me 14 years to understand
21:06:52 <LordAro> so even if a file named 'run' exists, `make run` will always run the rule
21:07:02 <LordAro> whereas normally it would decide that there's nothing to do
21:08:11 <andythenorth> I wonder if I can just chain makefiles
21:08:27 <LordAro> you can, but it makes the dependencies a bit weird
21:08:36 <andythenorth> annoyingly the existing makefile is already 99% parameterised
21:08:59 <andythenorth> so if I wanted to make iron-moose.grf I could just pass `make PROJECT_NAME=iron-moose`
21:09:19 <andythenorth> but I want to dispatch all grfs at once sometimes
21:09:40 <LordAro> iron-moose.grf: <something>\n\t$(MAKE) PROJECT_NAME=iron-moose
21:10:03 <LordAro> all_grf: iron-moose.grf iron-moose2.grf iron_moose3.grf
21:10:27 <andythenorth> can a makefile call itself? :P
21:10:45 <LordAro> it's a bit evil to do it *explicitly*
21:10:58 <LordAro> but it's essentially all it's doing when you define a rule with dependencies
21:11:13 <LordAro> useful for defining an explicit order too
21:11:16 <andythenorth> ok so a specific target for `all` might be what I need
21:11:27 <andythenorth> otherwise it has to be passed to be passed a project name for a single grf compile
21:11:41 <andythenorth> dunno, there's other targets like install
21:11:50 <andythenorth> this is what breaks my brain
21:11:59 <andythenorth> can't do `make all install`
21:12:16 <LordAro> i'd recommend something like `make grf PROJECT_NAME=iron-moose` for the actual grf-making rules
21:12:26 <LordAro> so that `make` actually does something useful
21:12:41 <LordAro> make all install can do something useful, if you've got the dependencies set up correctly
21:13:16 <andythenorth> if I could wrap all my current targets in 'foreach' it would ... probably work
21:13:20 <andythenorth> but I doubt that's a thing
21:13:40 <LordAro> you probably just need a list
21:16:01 <andythenorth> each target could redefine the value of all the vars
21:16:52 <LordAro> grf-%: ...\n\t$(MAKE) PROJECT_NAME=$* grf
21:17:18 <LordAro> then `make grf-iron-moose.grf`
21:17:45 <LordAro> other prefixes are available
21:18:20 <andythenorth> ok I kind of get it, I kind of don't :P
21:19:04 <andythenorth> some of the python stuff currently just runs everything for all rosters
21:19:08 <andythenorth> I'll need to adjust that
21:19:19 <andythenorth> many moving parts
21:21:57 <andythenorth> might be easier to reliably find deps if I encapsulate the graphics etc in separate dir for each grf
21:26:33 <andythenorth> ok I sleep on it :)
21:26:37 <andythenorth> thanks for the help
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23:37:27 <wallabra> Why are cities always uniformly spaced?
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