update make install to use NXF_PLUGINS_DIR. Update docs

Makefile

@@ -1,11 +1,14 @@
-
 config ?= compileClasspath
+version ?= $(shell grep 'Plugin-Version' plugins/nf-validation/src/resources/META-INF/MANIFEST.MF | awk '{ print $$2 }')
 
 ifdef module 
 mm = :${module}:
 else 
-mm = 
-endif 
+mm =
+endif
+
+NXF_HOME ?= $$HOME/.nextflow
+NXF_PLUGINS_DIR ?= $(NXF_HOME)/plugins
 
 clean:
 	./gradlew clean
@@ -14,11 +17,9 @@ compile:
 	./gradlew compileGroovy
 	@echo "DONE `date`"
 
-
 check:
 	./gradlew check
 
-
 #
 # Show dependencies try `make deps config=runtime`, `make deps config=google`
 #
@@ -44,15 +45,17 @@ else
 	./gradlew ${mm}test --tests ${class}
 endif
 
-
+install:
+	./gradlew copyPluginZip
+	rm -rf ${NXF_PLUGINS_DIR}/nf-validation-${version}
+	cp -r build/plugins/nf-validation-${version} ${NXF_PLUGINS_DIR}
 
 #
 # Upload JAR artifacts to Maven Central
 #
 upload:
 	./gradlew upload
 
-
 upload-plugins:
 	./gradlew plugins:upload
 

docs/contributing/setup.md

@@ -17,30 +17,18 @@ To compile and run the tests use the following command:
 
 To test with Nextflow for development purpose:
 
-Clone the Nextflow repo into a sibling directory
+Compile and install the plugin code
 
 ```bash
-cd .. && git clone https://github.com/nextflow-io/nextflow
-cd nextflow && ./gradlew exportClasspath
+make compile
+make install
 ```
 
-Append to the `settings.gradle` in this project the following line:
+!!! warning
 
-```bash
-includeBuild('../nextflow')
-```
-
-Compile the plugin code
-
-```bash
-./gradlew compileGroovy
-```
-
-Run nextflow with this command:
-
-```bash
-./launch.sh run -plugins nf-validation <script/pipeline name> [pipeline params]
-```
+    This installs the compiled plugin code into your `${HOME}/.nextflow/plugins`
+    directory. If the manifest version of your dev code matches an existing plugin any
+    install will be overwritten.
 
 ## Change and preview the docs