Conditions

An if block selects one branch. An optional else block runs when the condition is false.

kongue

mode: "debug"

main {
    if "$mode" == "debug" {
        print "debug build"
    } else {
        print "release build"
    }
}

The common operators are:

== equality
!= inequality
=~ regular-expression match
|| logical OR
&& logical AND

Values are often quoted in conditions so that interpolation happens before comparison.

kongue

architecture: "x86_64"
mode: "debug"

main {
    if "$architecture" == "x86_64" && "$mode" == "debug" {
        print "debug build for x86_64"
    }

    if "$architecture" =~ e"x86_64|aarch64" {
        print "supported architecture"
    }
}

The e"..." form marks a regular-expression pattern. In the example above, either architecture matches.