bug#36841: [PATCH] build/cargo-build-system: Patch cargo checksums.

[Efraim Flashner <efraim@flashner.co.il>]

[-- Attachment #1: Type: text/plain, Size: 1661 bytes --]

On Mon, Jul 29, 2019 at 06:44:31PM -0700, Ivan Petkov wrote:
> Hi Efraim,
> 
> > On Jul 29, 2019, at 12:04 PM, Efraim Flashner <efraim@flashner.co.il> wrote:
> > 
> > +;; After patching the 'patch-generated-file-shebangs phase any vendored crates
> > +;; will have a mismatch on their checksum.
> > +(define* (patch-cargo-checksums #:key
> > +                                (vendor-dir "guix-vendor")
> > +                                #:allow-other-keys)
> 
> [snip]
> 
> > +    (replace 'install install)
> > +    (add-after 'patch-generated-file-shebangs 'patch-cargo-checksums patch-cargo-checksums)))
> 
> I can’t quite remember the order the phases run in off the top of my head. Would it be possible to
> make the configure/checksum generation phase run after shebang-patching (or ensure the patching
> happens first)? It would avoid having to checksum all the files twice that way…
> 
> —Ivan

I thought about it a bit more after I sent the patch, and I'm pretty
sure this is only needed when there's a Cargo.lock file in the build
directory. So in actuality it should be more like:

(when (file-exists? "Cargo.lock")
  (begin
    (delete-file "Cargo.lock")
    (invoke "cargo" "generate-lockfile")
    (patch-cargo-checksums ...)))

I'm going to close this bug/patch and re-submit it when I've given it a
bit more work so it doesn't do the expensive compute-checksums
computation on all builds.

-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]