Creation of compiled/drracket directory in a read-only system directory

[racket]

Creation of compiled/drracket directory in a read-only system directory

[SuzanneSoy]

The only call to make-directory in cm.rkt is:

    (with-compiler-security-guard (make-directory* code-dir))

And @rfindler changed code-dir's definition recently, maybe it's related to that change?

[rfindler]

Yes, definitely related.

Is this a snapshot build?

[SuzanneSoy]

@rfindler Yes, a source build of https://plt.eecs.northwestern.edu/snapshots/current/installers/racket-test-6.4.0.15-src.tgz, the bug occurs with the pre-built-packages tarball too.

[rfindler]

I've pushed something that just gives up trying to put .zo files into directories that are not writeable. This seems like it can get into trouble if you ever open and modify a file that one of those files depends on (as those .zo files will be wrong and yet still used), and this can happen if you do something like "raco pkg update --clone " of some pkg where you put the cloned version of it in a writeable place. But hopefully that's not what's happening here.

Here's the commit. Tomorrow's build should have it and in the meantime you can uncheck the language dialogs "populate compiled directories" checkbox (click "show details" to make it appear).

7373295

[rfindler]

(I've closed this, but feel free to re-open if there are further problems.)

[SuzanneSoy]

Thanks! I'll try it when it comes out.

[SuzanneSoy]

@rfindler: The problem is still there with today's nightly (20160403-794061b), but it got worse as now even #lang racket and #lang racket/base don't work. They both give the following error:

../../nix/store/w2y4qp7dmjy4g4hsxcz411qy2m6y6b3g-racket-6.4.0.15/share/racket/collects/compiler/cm.rkt:358:0: make-directory: cannot make directory
  path: /nix/store/w2y4qp7dmjy4g4hsxcz411qy2m6y6b3g-racket-6.4.0.15/share/racket/collects/racket/compiled/drracket
  system error: Read-only file system; errno=30

The directory is read-only, though, as reported by ls:

> ls -ld /nix/store/w2y4qp7dmjy4g4hsxcz411qy2m6y6b3g-racket-6.4.0.15/share/racket/collects/racket/compiled/                                                                                                             ~
dr-xr-xr-x 2 root nixbld 8192 1970-01-01 01:00 /nix/store/w2y4qp7dmjy4g4hsxcz411qy2m6y6b3g-racket-6.4.0.15/share/racket/collects/racket/compiled/
> ls -ld /nix/store/w2y4qp7dmjy4g4hsxcz411qy2m6y6b3g-racket-6.4.0.15/share/racket/collects/racket/                                                                                                                      ~
dr-xr-xr-x 15 root nixbld 4096 1970-01-01 01:00 /nix/store/w2y4qp7dmjy4g4hsxcz411qy2m6y6b3g-racket-6.4.0.15/share/racket/collects/racket/

If I uncheck "Populate compiled/ directories", it works fine. Won't this cause poor performance, though? Shouldn't DrRacket use the already-populated 'compiled/' directories, if it can't populate compiled/drracket?

[rfindler]

Wow, I sure messed that commit up! I've tried again, this time with better testing. Hopefully it won't make things worse this time.