This app demos calling native code from Clojure, using the excellent Coffi library found at https://github.com/IGJoshua/coffi
Download from https://github.com/danielmartincraig/coffi-demo-deps
This application uses the native strlen function from the standard c library to count the strlen of a user-provided string.
Run the project directly, via :exec-fn:
$ clojure -X:run-x
The length of the input string "Clojure" is: 7
Run the project, overriding the string to be strlen'd:
$ clojure -X:run-x :user-input '"Hello World"'
The length of the input string "Hello World" is: 11
Run the project directly, via :main-opts (-m danielmartincraig.coffi-demo-deps):
$ clojure -M:run-m "Hello World"
The length of the input string "Hello World" is: 11
Run the project's tests:
$ clojure -T:build test
Run the project's CI pipeline and build an uberjar:
$ clojure -T:build ci
This will produce an updated pom.xml file with synchronized dependencies inside the META-INF
directory inside target/classes and the uberjar in target. You can update the version (and SCM tag)
information in generated pom.xml by updating build.clj.
If you don't want the pom.xml file in your project, you can remove it. The ci task will
still generate a minimal pom.xml as part of the uber task, unless you remove version
from build.clj.
Run that uberjar:
$ java -jar --add-modules=jdk.incubator.foreign --enable-native-access=ALL-UNNAMED target/coffi-demo-deps-0.1.0-SNAPSHOT.jar "Hello World"
If you remove version from build.clj, the uberjar will become target/coffi-demo-deps-standalone.jar.
Copyright © 2022 Daniel Craig
Distributed under the Eclipse Public License version 1.0.