TINKERPOP-1055 Gremlin Console FileNotFoundException can be misleading

[spmallette]

https://issues.apache.org/jira/browse/TINKERPOP-1055

Some relatively minor refactoring required to get this working. Tested manually only as I wasn't sure how to write tests around the console when it was calling System.exit(1) on error. I first tested a "good" script:

$ cat test.groovy
x=1
addItUp = {x,y -> x+y}

$ bin/gremlin.sh test.groovy

         \,,,/
         (o o)
-----oOOo-(3)-oOOo-----
plugin activated: tinkerpop.server
plugin activated: tinkerpop.utilities
plugin activated: tinkerpop.tinkergraph
==>1
==>groovysh_evaluate$_run_closure1@5536379e
gremlin> addItUp(1,10)
==>11

Then I tested a script that wasn't present on the file system:

$ bin/gremlin.sh test1.groovy

         \,,,/
         (o o)
-----oOOo-(3)-oOOo-----
plugin activated: tinkerpop.server
plugin activated: tinkerpop.utilities
plugin activated: tinkerpop.tinkergraph
Gremlin initialization file not found at [test1.groovy].

Finally, I tested a script with an error in the script itself:

$ cat test-fail.groovy
x = 1
y = x / 0

$ bin/gremlin.sh test-fail.groovy

         \,,,/
         (o o)
-----oOOo-(3)-oOOo-----
plugin activated: tinkerpop.server
plugin activated: tinkerpop.utilities
plugin activated: tinkerpop.tinkergraph
==>1
Bad line in Gremlin initialization file at [y = x / 0] - Division by zero

VOTE: +1

[twilmes]

Looking good.

VOTE: +1

[okram]

VOTE +1