failure with a pinned opam package

[Hannes Mehnert]

I try to use opam monorepo 0.3.3 with the following pins:
gmp.6.2.1-2 (uninstalled) git git+file:///usr/home/hannes/devel/mirage/ocaml-gmp#HEAD

And receive a failure during opam monorepo lock:

gmake[2]: Leaving directory '/usr/home/hannes/devel/mirage/mirage-skeleton/applications/static_website_tls'
 ↳ generate lockfile for monorepo dependencies
==> Using 1 locally scanned package as the target.
==> Found 130 opam dependencies for the target package.
==> Querying opam database for their metadata and Dune compatibility.
==> Calculating exact pins for each of them.
opam-monorepo: [ERROR] No HEAD ref for file:///usr/home/hannes/devel/mirage/ocaml-gmp

It would be pretty nice to support pins to git repositories the same as opam does, or are there any blockers?

[Marek Kubica]

Hmm, that's strange. It should be able to find a HEAD ref, given that you specifically pinned it to HEAD, so at least that error message is pretty much incorrect.

[Marek Kubica]

Can you help me by passing ways to reproduce? I checked out mirage-skeleton and added ocaml-gmp from the Mirage org as a pin but I don't know how to get it to do the locking. When i make lock it fails with a lot of error messages.

[Hannes Mehnert]

so. in a clean opam switch

1. git clone https://github.com/mirage/ocaml-gmp.git
2. opam pin add -n gmp `pwd`/ocaml-gmp#HEAD (to pin gmp)
3. opam instal mirage (should be 4.2+)
4. git clone https://github.com/mirage/mirage-skeleton.git
5. cd mirage-skeleton/applications/static_website_tls
6. mirage configure -t hvt
7. make depend (which calls opam monorepo lock)

If you run into issues ("it fails with a log of error messages"), please report the step and the failure you encounter.

[Hannes Mehnert]

Any chance you could post your "lot of error messages", or expose where you're stuck? I suspect opam-monorepo fails if you opam pin add <whatever-dep> `pwd`#HEAD -- which is my goto-solution for local pins that are git-controlled (opam takes the HEAD -- i.e. if I add commits, or switch branches, an opam reinstall will do the right thing).

[Marek Kubica]

Ah I guess my problem was that I tried running make lock in the toplevel:

/bin/sh: line 1: cd: tutorial/noop/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: tutorial/noop-functor/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: tutorial/hello/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: tutorial/hello-key/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: tutorial/lwt/echo_server/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: tutorial/lwt/heads1/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: tutorial/lwt/heads2/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: tutorial/lwt/timeout1/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: tutorial/lwt/timeout2/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: tutorial/lwt/echo_server/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: tutorial/app_info/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: device-usage/clock/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: device-usage/conduit_server/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: device-usage/console/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: device-usage/http-fetch/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: device-usage/kv_ro/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: device-usage/network/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: device-usage/ping6/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: device-usage/prng/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: applications/docteur/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: applications/dhcp/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: applications/git/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: applications/dns/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: applications/crypto/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: applications/static_website_tls/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
/bin/sh: line 1: cd: device-usage/block/mirage: No such file or directory
ls: cannot access '*.opam': No such file or directory
[opam-overlays] no changes from git+https://github.com/dune-universe/opam-overlays.git
[NOTE] Repository opam-overlays has been added to the selections of switch /home/me/mirage-skeleton only.
       Run `opam repository add opam-overlays --all-switches|--set-default' to use it in all existing switches, or in newly created switches, respectively.

[mirage-opam-overlays] no changes from git+https://github.com/dune-universe/mirage-opam-overlays.git
[NOTE] Repository mirage-opam-overlays has been added to the selections of switch /home/me/mirage-skeleton only.
       Run `opam repository add mirage-opam-overlays --all-switches|--set-default' to use it in all existing switches, or in newly created switches, respectively.

env OPAMVAR_monorepo="opam-monorepo" opam monorepo lock --recurse-opam  --build-only --ocaml-version 4.14.0 -l ./mirage.opam.locked
opam-monorepo: [ERROR] Cannot find any packages to vendor.
Either create some *.opam files in the local repository, or specify them manually via 'opam monorepo lock <packages>'.
make: *** [Makefile:67: lock] Error 1

I'll try your steps.

[Marek Kubica]

Created #332 to fix the problem. I am not entirely sure why the code is like that, but let's see what the code review will say.

[Hannes Mehnert]

Even with the latest release, 0.3.4, this issue persists. Are there any plans to fix and release this issue? It is pretty annoying.

[Marek Kubica]

@hannesm It's been fixed in #332 so the current main should work, I'll cut a release soon.

[Marek Kubica]

@hannesm I've created a 0.3.5 release which includes the fix: ocaml/opam-repository#22765