[#817] add crispin to lib tests and projects.md (#918)

* add crispin to lib tests and projects.md

* add a missing line in crispin example

deps.edn

@@ -81,7 +81,8 @@
                          rm-hull/jasentaa {:mvn/version "0.2.5"}
                          slingshot/slingshot {:mvn/version "0.12.2"}
                          io.replikativ/hasch {:mvn/version "0.3.7"}
-                         com.grammarly/omniconf {:mvn/version "0.4.3"}}
+                         com.grammarly/omniconf {:mvn/version "0.4.3"}
+                         crispin/crispin {:mvn/version "0.3.8"}}
             :classpath-overrides {org.clojure/clojure nil
                                   org.clojure/spec.alpha nil
                                   org.clojure/core.specs.alpha nil}}

doc/projects.md

@@ -40,6 +40,9 @@ The following libraries and projects are known to work with babashka.
     - [rewrite-edn](#rewrite-edn)
     - [expound](#expound)
     - [omniconf](#omniconf)
+    - [slingshot](#slingshot)
+    - [hasch](#hasch)
+    - [crispin](#crispin)
   - [Pods](#pods)
   - [Projects](#projects-1)
     - [babashka-test-action](#babashka-test-action)
@@ -598,6 +601,33 @@ NOTE: hasch's tests pass with babashka except the test around hashing
 records. This is due to a difference in how records are implemented in
 babashka. This may be fixed later if this turns out to be really useful.
 
+### [crispin](https://github.com/dunaj-project/crispin)
+
+Populate a configuration map from multiple sources (environment variables, 
+system variables, config files, etc.)
+
+Example:
+
+script.clj
+``` clojure
+#!/usr/bin/env bb
+
+(ns script
+  (:require [babashka.deps :as deps]))
+
+(deps/add-deps
+ '{:deps {crispin/crispin {:mvn/version "0.3.8"}}})
+
+(require '[crispin.core :as crispin])
+(def app-cfg (crispin/cfg))
+(app-cfg :foo)
+```
+
+``` text
+FOO=1 script.clj
+"1"
+```
+
 ## Pods
 
 [Babashka pods](https://github.com/babashka/babashka.pods) are programs that can

test-resources/lib_tests/babashka/run_all_libtests.clj

@@ -223,6 +223,8 @@
 
 (test-namespaces 'omniconf.core-test)
 
+(test-namespaces 'crispin.core-test)
+
 ;;;; final exit code
 
 (let [{:keys [:test :fail :error] :as m} @status]

test-resources/lib_tests/crispin/core_test.clj

@@ -0,0 +1,22 @@
+(ns crispin.core-test
+  (:require [clojure.test :refer [deftest is testing]]
+            [crispin.core :as cfg]))
+
+(deftest crispin.core-test
+  (testing "config from multiple sources"
+    (do
+      (cfg/load-custom-cfg! "test-resources/lib_tests/crispin" "crispin-test-custom-cfg.edn")
+      (System/setProperty "crispintest.value" "yes")
+      (System/setProperty "crispin" "test-resources/lib_tests/crispin/crispin-test-cfg.edn")
+      (let [c (cfg/cfg)]
+        ; something from the environment
+        (is (not-empty (cfg/sget c :path)))
+        ; things from the resource named by the :crispin property
+        (is (= "pina colada" (cfg/sget-in c [:likes 0])))
+        (is (= 3.14 (cfg/nget-in c [:crispintest :pi])))
+        ; something from system properties
+        (is (true? (cfg/bget-in c [:crispintest :value])))
+        ; something from load-custom-cfg! file
+        (is (= :bar (:foo c))))
+      (System/clearProperty "crispintest.value")
+      (System/clearProperty "crispin"))))

test-resources/lib_tests/crispin/crispin-test-cfg.edn

@@ -0,0 +1,2 @@
+{:crispintest {:pi 3.14}
+ :likes ["pina colada" "getting caught in the rain"]}

test-resources/lib_tests/crispin/crispin-test-custom-cfg.edn

@@ -0,0 +1 @@
+{:foo :bar}