Compute the CMake generator for Windows (for use in Jenkins, for instance) based on some orthogonal environment variables.

ComputeGenerator.groovy

/* ComputeGenerator.groovy by Ryan Pavlik - maintained at https://gist.github.com/rpavlik/3ad0e691e5d51606bd67 */

/* Uncomment the following for testing purposes only */
/*
VS='12'
BIT='64'
*/
/* should give result [GENERATOR:Visual Studio 12 2013 Win64] */


def getVSVersionName(vsVerNum) {
    def result = 'Visual Studio ' + vsVerNum
    switch (vsVerNum) {
        case '8':
            result += ' 2005'
            break
        case '9':
            result += ' 2008'
            break
        case '10':
            result += ' 2010'
            break
        case '11':
            result += ' 2012'
            break
        case '12':
            result += ' 2013'
            break
        case '14':
            result += ' 2015'
            break
    }
    result
}

def getVSGenerator(vsVerNum, bits) {
    def result = getVSVersionName(vsVerNum)
    if (bits.equals('64')) {
        result += ' Win64';
    }
    result
}

/* return value */
[GENERATOR: getVSGenerator(VS, BIT)]