Groovysh init script

Question

I'm looking for a way to have groovysh initialized and then dropped into a regular groovysh interactive session. That is:

• Run some scripts (e.g. imports or anything else)
• Continue running in groovysh as if previous script was typed manually from the start of the session.

Seen this:

• How to add imports to groovysh on startup?

but I'd like to be able to do this on a per-application, not per-user level. I.e. different applications usually do not import same things (or initialize in the same way otherwise). Is that possible?

Answer 1

Since Groovy 2.4 you can use groovysh -e '... your code here ...'.

Examples:

$ groovysh -e '2+2'
Groovy Shell (2.4.7, JVM: 1.8.0_131)
Type ':help' or ':h' for help.
----------------------------------------------------------
groovy:000> 2+2
===> 4

If you want to preload a script, use :load like so:

$ cat preamble.groovy 
def hello(x) {
  "Hello ${x}"
}
println hello("world")

$ groovysh -e ':load preamble.groovy'
Groovy Shell (2.4.7, JVM: 1.8.0_131)
Type ':help' or ':h' for help.
----------------------------------------------------------
groovy:000> :load preamble.groovy
===> true
Hello world
===> null
groovy:000> hello('stackoverflow')
===> Hello stackoverflow

(in last example I manually typed last line, I could use function hello defined in preamble)

Answer 2

Per this post:

• http://groovy.329449.n5.nabble.com/groovy-equivalent-to-python-i-script-py-tp372587p5719768.html

looks like Groovy <= 2.3 doesn't support this and it's going to be present in Groovy 2.4 using this syntax:

groovysh -e foo.groovy

Answer 3

Using the load keyword seems to work:

$ cat test.groovy
myStr = "hello World!"
$
$ groovysh
groovy:000> load test.groovy
===> hello World!
groovy:000> println myStr
hello World!
===> null
groovy:000>