Re: [O] Not overwriting unchanged source code files when tangling

[Rustom Mody]

Such tools are for example scons is a make alternative that rethinks make's "older timestamp => rebuild"

From www.scons.org/architecture/index.html

> (S)Cons decides if a file was out-of-date by using MD5 checksums of
>         the contents of files, not timestamps.
>
>       


SCons also comes to mind because you are using make for R not (traditional) programming


> Most of the build tools just mentioned
>     were written by programmers and for
>     programmers. The fact that most programmer-friendly
>     utilities do a poor job of fulfilling the needs
>     of non-programmers prompted Greg Wilson to
>     organize the Software Carpentry competition in January 2000.
>     Software Carpentry was an
>     open design contest with the express goal of producing a set of
>     next-generation utilities, including a build tool, that would be
>     accessible
>     not only to
>     programmers
>     but also to computer users
>     such as physical scientists.
>
>

[Disclaimer: Ive not tried scons myself]