Declare array/hashmap in gradle.properties file
I'm trying to define an array in the gradle.properties file. When, for example, I do the next in some gradle script:
project.ext.mygroup = [
myelement1: "myvalue1",
myelement2: "myvalue2"
]
project.mygroup.put("myelement3", "myvalue3"); // As internally it works like a hashmap
and then I list the properties, I get:
mygroup: {myelement1=myvalue1, myelement2=myvalue2, myelement3=myvalue3}
So, if I try setting a property with the same form in the gradle.properties file:
mytestgroup={myelement1=myvalue1, myelement2=myvalue2}
And then in the gradle script I try to access this property:
project.mytestgroup.put("myelement3", "myvalue3");
I get the next error:
No signature of method: java.lang.String.put() is applicable for argument types: (java.lang.String, java.lang.String) values: [myelement3, myvalue3]
This is because the property "mytestgroup" is being taken as a string instead of an array.
Does any one know what is the correct syntax to declare an array in the gradle.properties file?
Thanks in advance
The notation {myelement1=myvalue1, myelement2=myvalue2, myelement3=myvalue3} is simply a string representation of the object as the result of calling Map.toString() . It is not syntactically correct Groovy.
Your first example is the correct way to define a Map .
def myMap = [ key : 'value' ]
Defining an array is similar.
def myArray = [ 'val1', 'val2', 'val3' ]
Set the property to JSON string
myHash = {"first": "Franklin", "last": "Yu"}
myArray = [2, 3, 5]
and parse it in build script with JsonSlurper:
def slurper = new groovy.json.JsonSlurper()
slurper.parseText(hash) // => a hashmap
slurper.parseText(array) // => an array
The JsonSlurper way is good, but I wanted a cleaner way to define both a simple string or an array as a property. I solved it by declaring the property as:
mygroup=myvalue1
or:
mygroup=myvalue1,myvalue2,myvalue3
Then inside Gradle retrieve the property with:
Properties props = new Properties()
props.load(new FileInputStream(file('myproject.properties')))
props.getProperty('mygroup').split(",")
And you will get an array of String. Be careful with space characters around the commas.
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