feat: add basic lambda function

Author: Akeboshiwind

.gitignore

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+.clj-kondo/
+.lsp/
+.cpcache/
+target/
+.DS_Store

README.md

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+# Basic JVM Clojure lambda setup
+
+## Build
+
+To build an uberjar:
+
+```bash
+$ clj -T:build uber
+```
+
+Then upload the `target/lambda-*.jar` to your [lambda function](https://docs.aws.amazon.com/lambda/latest/dg/java-package.html#java-package-console)
+and off you go!

build.clj

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+(ns build
+  (:require [clojure.tools.build.api :as b]))
+
+(def lib 'my/lambda)
+(def version (format "0.1.%s" (b/git-count-revs nil)))
+(def class-dir "target/classes")
+(def basis (delay (b/create-basis {:project "deps.edn"})))
+(def uber-file (format "target/%s-%s-standalone.jar" (name lib) version))
+
+(defn clean [_]
+  (b/delete {:path "target"}))
+
+(defn uber [_]
+  (b/copy-dir {:src-dirs ["src" "resources"]
+               :target-dir class-dir})
+  (b/compile-clj {:basis @basis
+                  :src-dirs ["src"]
+                  :class-dir class-dir})
+  (b/uber {:class-dir class-dir
+           :uber-file uber-file
+           :basis @basis}))

deps.edn

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+{:paths ["src"]
+ :deps {org.clojure/clojure {:mvn/version "1.11.1"}
+        com.amazonaws/aws-lambda-java-core {:mvn/version "1.2.3"}}
+ :aliases
+ {:build {:extra-deps {io.github.clojure/tools.build {:git/tag "v0.8.4" :git/sha "8c3cd69"}}
+          :ns-default build}}}

src/lambda.clj

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+(ns lambda
+  (:gen-class
+   :implements [com.amazonaws.services.lambda.runtime.RequestStreamHandler]))
+
+(defn -handleRequest [_ is os _context]
+  (let [input (slurp is)]
+    (if (re-find #"error" input)
+      (throw (ex-info "test" {:my "error"}))
+      (spit os "test"))))