pantsbuild #general

If you want to, e.g., attach a debugger to a running tool, you can paste that full JVM command line into a terminal and replace the shaded jar with its unshaded equivalent (so it can match up sources)

witty-crayon-22786

06/22/2017, 5:28 PM

(and if you want to use a specific version, you can override any tool that pants is using.)

great-midnight-1044

06/22/2017, 6:10 PM

@witty-crayon-22786 FTR the incremental compilation that Jason is measuring does not come from Zinc 1.0, it's 0.13.x

great-midnight-1044

06/22/2017, 6:11 PM

and it seemed to be caused by inefficiencies in the new flat classpath search implementation: https://github.com/scala/scala/pull/5956

rough-minister-58256

06/22/2017, 8:14 PM

are we getting throttled by bintray or something? have been seeing an abnormal number of read timeouts in CI

witty-crayon-22786

06/22/2017, 10:05 PM

possibly. it's also possible that our travis caches are not as durable as they used to be? we really shouldn't be missing the

~/.cache/pants/**/*

cache very often.

rough-minister-58256

06/22/2017, 10:11 PM

mmhmm

rough-minister-58256

06/22/2017, 10:27 PM

fyi - looks like travis bumped forward their linux images which afaict appear to be causing some test failures related to locating a python2.6 interpreter for the interpreter selection tests. I just landed a tack-on travis.yml change to revert to the old image for now, which made my CI job go green. hopefully subsequent PRs/commits based off of that commit in master won’t be affected.

witty-crayon-22786

06/22/2017, 10:32 PM

thanks

gray-sugar-70433

06/23/2017, 2:32 AM

Hey guys, I want a go binary to depend on some files (templates for an html server), is this possible? I tried using the

resources

target to no avail. Neither could I find docs about it 😐

witty-crayon-22786

06/23/2017, 6:10 PM

@gray-sugar-70433 : go targets own all the files in their directory by default. so declaring a go target in a directory is the primary way currently.

gray-sugar-70433

06/23/2017, 8:51 PM

@witty-crayon-22786 do you know of an example somewhere? I’m doing something like this without success (running

./pants run backend/example

panics with

data.txt not available

)

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backend/example
├── BUILD
├── data.txt
└── main.go

Where backend is my go source root. Here’s the go file (just in case).

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// main.go
package main

import "io/ioutil"

func main() {
	_, err := ioutil.ReadFile("data.txt")
	if err != nil {
		panic("data.txt not available")
	}
}

And the BUILD file:

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go_binary()

enough-analyst-54434

06/23/2017, 8:58 PM

@gray-sugar-70433 & @witty-crayon-22786 IIRC there is no facility for bundling resources in a go binary - pants aside - today. IOW, if you tried to do this without pants you'd need to - for example, create a tarball of your go binary + data.txt, ship it, unpack it, now the go binary can expect data.txt. Is my understanding correct?

gray-sugar-70433

06/23/2017, 8:59 PM

yes

enough-analyst-54434

06/23/2017, 8:59 PM

OK - so pants provides no magic

enough-analyst-54434

06/23/2017, 8:59 PM

We could use a 3rd party golib to embed for you - unlikely

enough-analyst-54434

06/23/2017, 8:59 PM

We could support bundle better for go

gray-sugar-70433

06/23/2017, 8:59 PM

Looking for something like just getting my files copied to the dist directory or something along those lines

enough-analyst-54434

06/23/2017, 9:01 PM

OK that is - sort of - reasonable. Please file an issue detailing inputs -> output with the dist dir you expect. You might reference the idea of supporting

./pants bundle

for go, which would - in effect - respect the dist dir layout in a larger archive you could ship and unpack

gray-sugar-70433

06/23/2017, 9:01 PM

Ok. I’ll do that then, thanks 🙂

enough-analyst-54434

06/23/2017, 9:02 PM

Thank you!

purple-oil-45048

06/26/2017, 6:54 AM

@gray-sugar-70433 i think in the jvm-pants-world this is called a bundle .. not sure if the same exists in the go-pants-world

straight-waiter-86090

06/26/2017, 1:56 PM

hi - I have a question about cache configuration. We plan to have ci servers writing to cache, but developer machines only read from cache. For developers we currently have the following configuration:

straight-waiter-86090

06/26/2017, 1:56 PM

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[cache]
read_from: ['<http://pantscache01.ci.runwaynine.com:8000>']
read: True

straight-waiter-86090

06/26/2017, 1:57 PM

Should I disable writes on developer machines? Are developer builds needlessly writing to

.cache

? Or should I add .cache to the read_from list? Is there any benefit to this?

witty-crayon-22786

06/26/2017, 5:03 PM

writing to the local cache is a good idea

witty-crayon-22786

06/26/2017, 5:04 PM

writing to the remote cache from a user machine is riskier, and afaik, no one does it