Groovy scripts are nice - they allow to use dependencies and write logic in small single file,
but Groovy is mostly available on developers machine, but not on servers, so deploying them is a little more
tricky. You can package them in uberjar with Gradle, but it requires additional build file and compatible structure, so
it is more like project than script already.
To keep things simple, I have created Groovy script that converts other Groovy scripts into executable JARs. It packages all dependencies from Grab and compiles original script into Java main class with same name as script and sets it in manifest. So it is perfectly usable from empty JVM. JAR structure is also compatible with AWS lambda, so it can be launched from there too, just put logic in specific method. To convert your script, just download it from here and run like:
Script tries to find groovy libs via GROOVY_HOME, so set it or just hack it for your location, it is just one small Groovy script.
To keep things simple, I have created Groovy script that converts other Groovy scripts into executable JARs. It packages all dependencies from Grab and compiles original script into Java main class with same name as script and sets it in manifest. So it is perfectly usable from empty JVM. JAR structure is also compatible with AWS lambda, so it can be launched from there too, just put logic in specific method. To convert your script, just download it from here and run like:
./scriptjar.groovy input.groovy output.jar
Script tries to find groovy libs via GROOVY_HOME, so set it or just hack it for your location, it is just one small Groovy script.
Thank you for your article. I also search that information, and when I was read yours, it became useful to me. I may recommend to you good advice how to open jar file https://wikiext.com/jar here. There is an instruction and exactly the right file, which you need to download, in case you will have bugs.
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./scriptjar.groovy input.groovy output.jar -> where to execute this command ? In Command prompt ? I tried in CMD and got '.' is not recognized as an internal batch command
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ReplyDeleteorg.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
script15681542317091305207412.groovy: 9: expecting '(', found 'n' @ line 9, column 12.
while n <= 25:
^
1 error
Groovy Version: 2.5.8 JVM: 11.0.3 Vendor: SAP SE OS: Linux
Open JDK 11
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Nice blog to read, Thanks for sharing this valuable article.
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it's a very nice script. good detail in groovy. they are best useful in this script cmd. og whatsapp
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