`julia_setup(installJulia = TRUE)` does not reliably install julia.

[eliocamp]

Due to a different error I found that julia_setup will skip installation if julia is already installed .

The problem is here, where julia_setup() first uses julia_locate() and if it's found, it skips the whole installation, even if installJulia is set to TRUE.

    JULIA_HOME <- julia_locate(JULIA_HOME)

    if (is.null(JULIA_HOME)) {
        if (isTRUE(installJulia)) {
            install_julia(version)
            JULIA_HOME <- julia_locate(JULIA_HOME)
            if (is.null(JULIA_HOME))
                stop("Julia is not found and automatic installation failed.")
        }
        else {
            stop("Julia is not found.")
        }
    }

This means that julia_setup(version = "latest", installJulia = TRUE) will, in fact, not install the latest version if an older version is present. Similarly, julia_setup(installJulia = TRUE, version = "1.9.0") will not install the required version if any other version exists.

The installer should check if the installed version matches the required version and only skip installation if they match.