On Sun, Nov 27, 2016 at 7:25 PM, Robert Durkacz <robert.durk...@gmail.com> wrote:
> Has thought been given, over the years, to extending bash to do > what make does, in the obvious way that I am about to describe? > > It would be a matter of having chosen build commands do nothing if their > outputs are newer than their inputs. For example that is, cc file.c -o > file.o should execute normally if file.c is the newer file but do nothing > if file.o is newer. > > Then you would have a deterministic script to build a system that simply > skipped steps determined to be unnecessary. > > It is possible to achieve this without changing bash but it seems like > there would be leverage in having bash deliberately support this mode. > Use the newer-than test: source=file.c object=file.o [[ $source -nt $object ]] && cc "$source" -o "$object" -- Visit serverfault.com to get your system administration questions answered.
