dustingetz on Clojure builds as an amalgamation of orthogonal parts

Comment on Clojure builds as an amalgamation of orthogonal parts parent

i agree that it’s possible to have both, but you have to start with simple, and as he said in the talk which we just reread, easy is often relative to your local priors

also those custom hand rolled fns are … a library, which is way better than a build plugin

filoeleven 5y

Thanks. I didn’t even know that leinengen has plugins.

If tools.* is the language maintainers’ preferred method, I think there is value in having a single command to set up a “simple/default Clojure project” in a folder, even if that only cuts the commands down from four to one.

  $ mkdir hello-world
  $ cp deps.edn hello-world
  $ cd hello-world
  $ mkdir src

I don’t understand where that deps.edn comes from in a fresh project. It’d be great to have “clj create hello-world” build one for me in ./hello-world, use my running Clojure version as a dependency (if that’s how “clj” works), create the child src/ (and /test if that’s a best practice) folders, etc. The idea being to generate a local library on-demand with sane boilerplate defaults and almost no knowledge. I can learn later what Else I might need if I can get it up and running quickly first.

Leinengen looks easier to me for my admittedly trivial use cases, because I don’t need a library or plugins at all. And again, I might be in the minority. But if folks keep saying “lein handles 90% and is easier,” and if we can make tools.* handle those same 90% cases trivially, it seems worthwhile.

seancorfield 5y

If you're using the latest (prerelease) version of the Clojure CLI:

    # this is a one-off step to install the clj-new tool:
    (! 646)-> clojure -Ttools install com.github.seancorfield/clj-new '{:git/tag "v1.1.324"}' :as new
    Installed new
    # now you can run it anywhere to create new app or lib projects:
    (! 647)-> clojure -Tnew app :name myname/myapp
    Generating a project called myapp based on the 'app' template.
    (! 648)-> tree myapp
    myapp
    |____.gitignore
    |____.hgignore
    |____CHANGELOG.md
    |____deps.edn
    |____doc
    | |____intro.md
    |____LICENSE
    |____pom.xml
    |____README.md
    |____resources
    | |____.keep
    |____src
    | |____myname
    | | |____myapp.clj
    |____test
    | |____myname
    | | |____myapp_test.clj

This is already set up with testing and JAR building for you:

    (! 649)-> cd myapp
    (! 650)-> clojure -X:test
    
    Running tests in #{"test"}

    Testing myname.myapp-test

    FAIL in (a-test) (myapp_test.clj:7)
    FIXME, I fail.
    expected: (= 0 1)
      actual: (not (= 0 1))
    
    Ran 1 tests containing 1 assertions.
    1 failures, 0 errors.
    (! 651)-> clojure -X:uberjar
    [main] INFO hf.depstar.pom - Synchronizing pom.xml
    Skipping paths: resources
    [main] INFO hf.depstar.aot - Compiling myname.myapp ...
    [main] INFO hf.depstar.uberjar - Building uber jar: ./myapp.jar
    [main] INFO hf.depstar.uberjar - Processing pom.xml for {net.clojars.myname/myapp {:mvn/version "0.1.0-SNAPSHOT"}}
    (! 652)-> java -jar myapp.jar 
    Hello, World!

dustingetz 5y

{:paths ["src"] :deps {org.clojure/clojure {:mvn/version "1.10.0"}}}

that's it

seancorfield 5y

You don't even need that -- those are the defaults for the CLI.

    (! 639)-> mkdir fresh && cd fresh
    (! 640)-> mkdir -p src/myns
    (! 641)-> echo '(ns myns.myfile) (defn foo [{:keys [name]}] (println (str "Hello, " name "!")))' > src/myns/myfile.clj
    (! 642)-> clojure -X myns.myfile/foo :name "filoeleven"
    Hello, filoeleven!

No deps.edn file needed -- until you want to add extra dependencies etc.

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