Is there something like https://github.com/NoRedInk/rspec-retry for clojure.test?

how to get a hash of a data structure in Clojure?

(hash datastructure)

reminds me my question from yesterday: how to resolve a symbol in a macro? answer: (resolve s)

Hello! I'm new here, I posted this message in #beginners but I think it's not the best place... here it goes: We are working on a project were Datomic is being used. We want to analyze de data using ML alorightms (we are data analyst). The thing is we don't event know where to start from!! Could someone point me in any direction?

@aaguirre in addition to the official datomic docs, this might be helpful summary http://tonsky.me/blog/unofficial-guide-to-datomic-internals/

It's basically a stream of datoms, which you can just use like data however you want

thx John, I'll check it now 🙂 I'm sure I'll find interesting things there

Slice up history using as-of and since https://docs.datomic.com/on-prem/filters.html

There's more convo about it over in #datomic def ask around in there too

@aaguirre are you already familiar with datalog?

I've read the documentation about it, but I haven't use it. So I wouldnt say Iam "familiar"

anyway,my question was more related to arquitecture

for example, can I somehow connect Spark to Datomic?

defrecord can't catch closure?

(let [x 3] (defrecord Foo [] IFoo (foo [this] x)))

no

reify can be used to create instances of an interface that close over state

Is there a way to run a clojure -main from outside the project dir like?

cd ~/Projects
clj --dir ~/Projects/find-git-files -m find-git-files.cmdline ./

is there a native way to deploy an uberjar with lein ? I am trying to do this using a CI Server with lein installed on it.

I think I figured it out, I can use the -Sdeps flag pointing to the repo to include it in the classpath

clj -Sdeps "{:deps {find-git-remotes {:local/root \"./find-git-remotes\"}}}" -m find-git-remotes

Struggling with lein's uberjar feature, I'm confused why we're not making this not easier for people

Here's my summary: - most of the time AOT compilation is not desirable - ns-level forms are executed during AOT compilation, which is confusing - the only reason why most people use AOT is to set the entry point for the uberjar so that you can java -jar uberjar.jar instead of the - often superior - java -cp uberjar.jar -m foo.main

The whole situation confuses people: - people don't understand how gen-class works or why it's necessary - leiningen warns and unnecessarily suggests that you should set :aot :all - which doesn't seem like a good default to me - if you specify :aot [foo.main] explicitly, that works but due to a bug in lein it compiles the ns twice if you also set :main foo.main https://github.com/technomancy/leiningen/issues/2521

Really all you want is to generate a class that does the equivalent of these two lines: https://github.com/pesterhazy/lein-aot-example/blob/master/src/foo/main.clj#L7-L8

AIUI most projects will be better off doing that than AOT'ing everything

... given that the Clojure compiler is very fast, it doesn't blur the line between compile time and run time and other issues with AOT'ing

Is there something I'm missing here?

Can you deploy an uberjar with lein deploy ?

you shouldn’t, at least not in public repos

I think there's also a perception that AOT helps with startup time

@lilactown I mean it'll be faster because the compile step isn't needed but is there any advantage to aot'ing other than that?

¯\(ツ)/¯

if you’re deploying an application: AOT is fine. library: don’t AOT

yes, it helps with startup time significantly

https://clojure.org/reference/compilation is the bible on it, not whatever lein says

@ghadi that distinction between lib and app code is useful, thanks

lein uberjar generally does both tar and AOT

by default lein uberjar doesn't aot, unless you specify :main or :aot AFAIK

Wrote this tiny cli tool to update git remotes in all of my projects. However, since I need to write to the file I’m reading I have to read all the lines of each config file into a seq, process them, then write to the file, move to next file. Is there a way to make that more efficient so I don’t need to load an entire config into memory at once like in line #23?

@ghadi also thanks for providing the link to the justification for aot'ing. Part of the problem is that leiningen is undocumented, except for the sample project.clj

a better default for lein, I think, would be to do the moral equivalent of lein run in the uberjar

then users would be able to enable aot'ing as necessary, irrespective of whether they're building an uberjar or not

as it is, lein unnecessarily complects aot'ing and creating uberjars

that is not true

ugh

it is, that must have changed at some point

ugh, five years ago

I figured out how to deploy an uberjar lein do uberjar, deploy [release-repo] [identifer] [version] path/to/uberjar, deploy [release-repo]

@alcamech does the last step do anything?

is that if you want to deploy both a jar and an uberjar?

@noisesmith, Yeah I should have specified that. I wanted to deploy both a jar and an uberjar. I knew how to deploy a jar but not an uberjar.

hmm I noticed that pulling in git dependencies from a deps.edn is not possible when pulling over ssh with an ed25519 keypair. I know thats a limitation of the JGit library (https://bugs.eclipse.org/bugs/show_bug.cgi?id=520927), but shouldn’t that be something that is worth documenting in tools.gitlib’s readme?

Or is there some workaround I am missing

it’s annoying but make sure you use an ssh agent @lennart.buit

export SSH_AUTH_SOCK=…path to your agent socket

you also may have to modify entries within .ssh/config — specifically remove IdentityFile and let your ssh-agent be smart about it

Right, but only the ed25519 public key is known to GH right.

Hmm maybe I have multiple issues at the same time :’), eyeballing https://dev.clojure.org/jira/browse/TDEPS-91

yes, that’s a separate issue

I believe it’s probably something you can get around by editing your ~/.ssh/known_hosts, but certainly not the best

I’d like to make the switch to just using git but I need to strategize how to best do that without breaking lots of people

right, because that would need git to be explicitly installed right

as in the C binaries + all other git fluff

@alexmiller Maybe attempt to shell out to git and fallback to jgit if that fails?

well I’m thinking that we would maybe initially ship with support for both and have some way for user to override

but default logic would probably be git falling back to jgit (as I’d like to eventually remove jgit entirely)

Hey, all. I'm using deps.edn and building my project on Gitlab. It takes ages because it pulls the clojars deps everytime. How can I find out where on the filesystem those deps end up so that I can cache them?

I was expecting it to be ~/.m2, but that seems not to be the case...

are all your dependencies maven artifacts? those should all end up in m2

any git dependencies will be in ~/.gitlibs

but if you are downloading stuff from clojars, then it should end up in /.m2 then I would double check your build environment, you building in a container or something and getting a fresh /.m2 everytime, etc

Cheers, will dig more.

@phil it seems that .m2 is the location they use by default: https://gitlab.com/gitlab-org/gitlab-ce/blob/master/lib/gitlab/ci/templates/Maven.gitlab-ci.yml and caching the dir .m2/repository should work

@borkdude Thanks, I've actually seen that before, it didn't seem to work for me.

I'll just do a find and bruteforce my way to finding out where they are.

no need to brute force. write the output of find to a file. Then run find again after into a different file. then do: vim -d file1 file2 to see the difference between the two 🙂

Yea, well, that's really what I mean by bruteforce.

Is this a bug?

no

type returns a instance of java.lang.Class

clojure.lang.Keyword is a symbol (that evaluates to a java.lang.Class object) and case test-constants are not evaluated

case only works with compile time literals. Try condp = instead

https://puredanger.github.io/tech.puredanger.com/2010/05/30/learning-clojure-15-case/

thank you very much:)

@phil you can also run clojure -Spath

@borkdude perfect!

When writing websites, is it recommended to stick to standard HTML? Writing with a DSL such as Hiccup seems powerful, but I'm wondering about how I should handle CSS/Javascript then.