
As Jam prints the entire erring command on failure, including this if-test in the command itself makes the output somewhat difficult to decipher. So instead we use two separate rules based on whether or not NO_DOWNLOADS is set or not.
As Jam prints the entire erring command on failure, including this if-test in the command itself makes the output somewhat difficult to decipher. So instead we use two separate rules based on whether or not NO_DOWNLOADS is set or not.