bug#43893: [PATCH v3] maint: update-guix-package: Prevent accidentally breaking guix pull.

[Maxim Cournoyer <maxim.cournoyer@gmail.com>]

Hi Ludovic,

Ludovic Courtès <ludo@gnu.org> writes:

> Hi,
>
> Maxim Cournoyer <maxim.cournoyer@gmail.com> skribis:
>
>> Ludovic Courtès <ludo@gnu.org> writes:
>

[...]

>> Sorry, I'm a bit lost.  Are you suggesting that we should restore the
>> code following the ;; Re-add SOURCE [...], but wrapped with unless to
>> make it conditional to GUIX_ALLOW_ME_TO_USE_PRIVATE_COMMIT being
>> defined?  That part depends on SOURCE, a store file name, which we don't
>> have anymore since we no longer add the sources to the store to compute
>> the hash.
>
> I’m saying that the solution to the initial problem (that if you don’t
> run ‘guix build guix -S --check’ you’re not sure ‘guix’ is referring to
> a valid upstream commit)

The original problem was about the updated Guix package containing a
faulty hash (due to being computed from a uncontrolled checkout that
could be dirty).  The other concern about preventing the use of a not
yet published commit was added based on earlier feedback.

> above.  The trick at “Re-add SOURCE” is here precisely to prevent
> attempts to re-download, as the comment explains, and this is what has
> been causing these troubles.
>
> The advantages (to me) would have been simpler code, no shelling out to
> ‘git’, and no fiddling with files under $PWD.

Less code would also mean poorer diagnostics:

time ./pre-inst-env guix build guix -S
The following derivation will be built:
   /gnu/store/zhfchz831mncd2kyqmh5d2q0r2rpg57s-guix-1.1.0-31.07c13ae-checkout.drv
building /gnu/store/zhfchz831mncd2kyqmh5d2q0r2rpg57s-guix-1.1.0-31.07c13ae-checkout.drv...
guile: warning: failed to install locale
environment variable `PATH' set to `/gnu/store/378zjf2kgajcfd7mfr98jn5xyc5wa3qv-gzip-1.10/bin:/gnu/store/sf3rbvb6iqcphgm1afbplcs72hsywg25-tar-1.32/bin'
Initialized empty Git repository in /gnu/store/02da8jb3wzzi3bqvrl214gdg0kkxmaf8-guix-1.1.0-31.07c13ae-checkout/.git/
error: Server does not allow request for unadvertised object 07c13aeb5abb1a5bc3cabffb9b2212993a0d5a0e
Failed to do a shallow fetch; retrying a full fetch...
From https://git.savannah.gnu.org/git/guix
 * [new branch]      core-updates            -> origin/core-updates
[...]
 * [new tag]               v1.1.0rc2               -> v1.1.0rc2
fatal: reference is not a tree: 07c13aeb5abb1a5bc3cabffb9b2212993a0d5a0e
git-fetch: '/gnu/store/i5b1vv7qc6l2gi4xwa9mqzjy3shvgk30-git-minimal-2.28.0/bin/git checkout 07c13aeb5abb1a5bc3cabffb9b2212993a0d5a0e' failed with exit code 128
Trying content-addressed mirror at berlin.guix.gnu.org...
Trying content-addressed mirror at berlin.guix.gnu.org...
Trying to download from Software Heritage...
builder for `/gnu/store/zhfchz831mncd2kyqmh5d2q0r2rpg57s-guix-1.1.0-31.07c13ae-checkout.drv' failed to produce output path `/gnu/store/02da8jb3wzzi3bqvrl214gdg0kkxmaf8-guix-1.1.0-31.07c13ae-checkout'
build of /gnu/store/zhfchz831mncd2kyqmh5d2q0r2rpg57s-guix-1.1.0-31.07c13ae-checkout.drv failed
View build log at '/var/log/guix/drvs/zh/fchz831mncd2kyqmh5d2q0r2rpg57s-guix-1.1.0-31.07c13ae-checkout.drv.bz2'.
guix build: error: build of `/gnu/store/zhfchz831mncd2kyqmh5d2q0r2rpg57s-guix-1.1.0-31.07c13ae-checkout.drv' failed

real    1m42.825s
user    0m2.191s
sys     0m0.189s

This took nearly 2 minutes, fetching the full Guix git repo just to tell
me that *something* is not right.

Currently, we have:

time make update-guix-package
git rev-parse HEAD
4893a1394e2eb8b97995b491f2f37ed85513a20f
./pre-inst-env "/gnu/store/i7z4pfa0c22q0qkxyl7fy2nlp3w658yg-profile/bin/guile"                  \
   ./build-aux/update-guix-package.scm  \
   "`git rev-parse HEAD`"
error: Commit 4893a1394e2eb8b97995b491f2f37ed85513a20f is not pushed upstream.  Aborting.
make: *** [Makefile:6507: update-guix-package] Error 1

real    0m1.135s
user    0m1.066s
sys     0m0.199s

> BTW, in ‘make release’ does ‘make update-guix-package’ and expects it to
> work with a not-pushed-yet commit.  So it’s a case where we need
> GUIX_ALLOW_ME_TO_USE_PRIVATE_COMMIT=yes.

Ah, good point.  I'd like to fix this, but running 'make release', it
fails on:

make[3]: *** No rule to make target 'po/doc/guix-manual.pot', needed by
'distdir-am'.  Stop.

What did I miss?

Thank you!

Maxim