> On Dec 10, 2015, at 11:07 AM, Dmitri Gribenko <griboz...@gmail.com> wrote:
> 
> On Thu, Dec 10, 2015 at 9:59 AM, Daniel Dunbar <daniel_dun...@apple.com 
> <mailto:daniel_dun...@apple.com>> wrote:
>> Actually, I am retracting this suggestion in favor of what I think is a 
>> better one:
>> 
>> What if we change the build process to build up a "composed package" as part 
>> of the regular build. We would clear this at the start of each build, and 
>> then build up the installed compiler + libraries + package manager as each 
>> project completed its build (basically just using the same install logic 
>> into a side location).
>> 
>> This has a number of benefits:
>> 
>> - At the end of the build, we have a "build/<config>/bin" directory which 
>> has a functioning compiler.
>> - Each project in the chain can use the composed build to work with. So for 
>> example, the package manager can build with the compiler + xctest as they 
>> are expected to look in a package. This would reduce some complexity in our 
>> build process, and be more maintainable.
>> - This solution scales better if/when we add more projects.
>> - This solution also lets the build easily sub in an "prebuilt package" into 
>> the build process (it just means pointing at a different composed package).
>> 
>> Thoughts?
> 
> My concern is that copying files around will significantly increase
> the build time for everyone because of I/O.  Debug builds of Swift are
> quite large (> 700 Mb IIRC).

My thought here was to use rsync and its options for creating hard links where 
possible. This makes the copying very cheap...

 - Daniel

> 
> Dmitri
> 
> -- 
> main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
> (j){printf("%d\n",i);}}} /*Dmitri Gribenko <griboz...@gmail.com 
> <mailto:griboz...@gmail.com>>*/

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