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status-mobile/nix/deps/clojure
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Icaro Motta 563f1c588d
Improve test failure readability (#18049) 
Problem: failed equality checks as in "(is (= expected actual))" will give a
single, long line of output that for anything but the simplest data structures
is unreadable by humans, and the output doesn't give a useful diff.

Solution: use library https://github.com/nubank/matcher-combinators and its test
directive "match?" which will pinpoint where two data structures differ. Then,
instead of "(is (= ...", use "(is (match? expected actual)". It works
beautifully.

The library offers other nice matchers, but the majority of the time match? is
sufficient.

Can we use another test runner like Kaocha? kaocha-cljs2
(https://github.com/lambdaisland/kaocha-cljs2) would be able to print better
test errors out of the box, among other features, but I have no clue if it would
work well or at all in our stack (in theory yes, but it's a larger piece of
work).
 		2023-12-05 17:20:54 -03:00
..
README.md nix: stop downloading POMs for Clojure dependencies 2023-10-13 15:23:41 +02:00
default.nix nix: stop downloading POMs for Clojure dependencies 2023-10-13 15:23:41 +02:00
deps.json Improve test failure readability (#18049) 2023-12-05 17:20:54 -03:00
deps.list Improve test failure readability (#18049) 2023-12-05 17:20:54 -03:00
generate.sh nix: stop downloading POMs for Clojure dependencies 2023-10-13 15:23:41 +02:00

README.md

Description

This folder contains the scripts and Nix derivations necessary to generate Clojure dependencies for this project.

Usage

Running generate.sh in a shell that has available shadow-cljs and clojure should update the deps.list and deps.json files.

Details

By using the following command:

shadow-cljs classpath --force-spawn

We download the necessary JARs into ~/.m2 folder, but also get the classpath printed into standard output. We skip POM files since they are not necessary, and add edge cases we don't want to handle.

We then use the classpath in combination with contents of ~/.m2 folder to generate the following files:

  • deps.list - List of JARs relative to the ~/.m2 cache folder.
  • deps.json - Full list of JARs including their SHAs.

The deps.list file is just intermediate and for debugging purposes. The deps.json is loaded by the derivation in default.nix and used to produce a derivation that contains all the necessary dependencies:

 > grep cljfmt nix/deps/clojure/deps.list
cljfmt/cljfmt/0.6.7/cljfmt-0.6.7.jar

 > nix-build --no-out-link -A pkgs.deps.clojure
/nix/store/d7p8r9vhq6z2jmxwakxpcb262wgkc86s-status-mobile-clojure-deps

 > DEPS=$(nix-build --no-out-link -A pkgs.deps.clojure)                              

 > find $DEPS -iname 'cljfmt-0.6.7.*'
/nix/store/d7p...86s-status-mobile-clojure-deps/cljfmt/cljfmt/0.6.7/cljfmt-0.6.7.pom.sha1
/nix/store/d7p...86s-status-mobile-clojure-deps/cljfmt/cljfmt/0.6.7/cljfmt-0.6.7.pom
/nix/store/d7p...86s-status-mobile-clojure-deps/cljfmt/cljfmt/0.6.7/cljfmt-0.6.7.jar.sha1
/nix/store/d7p...86s-status-mobile-clojure-deps/cljfmt/cljfmt/0.6.7/cljfmt-0.6.7.jar