May old versions of cheerios be available on opam besides dev? about cheerios

[palmskog]

This has already been discussed in #12. Coq 8.10 is now almost 4 years old, and those who want to support for it will need to use old git commits in the repo. You can see in this issue comment how to install a specific commit via opam.

[brando90]

@palmskog which file do I need to update in my gitrepo such that the specified version of coq I want is used? this one? https://github.com/brando90/cheerios/blob/master/meta.yml

[brando90]

or this one? https://github.com/brando90/cheerios/blob/master/coq-cheerios.opam

[palmskog]

I don't really understand the question(s). Did you look at how opam pinning works? https://opam.ocaml.org/doc/Manual.html#Pinning

[brando90]

@palmskog yes. I think what I need is to find commit that works with some specific version of coq (I am happy with any commit that makes things work).

Currently trying this one but didn't work:

opam pin add coq-cheerios https://github.com/uwplse/cheerios.git\#9c7f66e57b91f706d70afa8ed99d64ed98ab367d

[palmskog]

Well, you can pin a commit in your own fork of cheerios if you like, e.g., after making fixes to it. The general gist is that the upstream repo master HEAD will stay on 8.14+.

[brando90]

perhaps useful, how to freeze a deps chain in opam: https://stackoverflow.com/questions/75452407/how-does-one-pin-freeze-a-version-of-the-dependencies-of-an-opam-project-package#75453430

[brando90]

@palmskog wouldn't a more stable solution to not overwrite the things pushed to opam? Similar to how things are done in python with pip? :) May this be requested?

[brando90]

for my issue I think this worked:

# -- Get cheerios, req to have old versions work in opam: https://github.com/uwplse/cheerios/issues/17
eval $(opam env --switch=coq-8.10 --set-switch)
# opam install might give issues since it gets the most recent version from the officialOPAM repository
#opam -y install coq-cheerios
# use opam pin since pin is created to install specific version (e.g. from git, local, etc.)
opam pin add coq-cheerios git+https://github.com/uwplse/cheerios.git#9c7f66e57b91f706d70afa8ed99d64ed98ab367

output:

(iit_synthesis) brando9~ $ opam pin add coq-cheerios git+https://github.com/uwplse/cheerios.git#9c7f66e57b91f706d70afa8ed99d64ed98ab367
[NOTE] Package coq-cheerios is currently pinned to git+https://github.com/uwplse/cheerios.git#9c7f66e57b91f706d70afa8ed99d64ed98ab367d (version dev).
Processing: [coq-cheerios.dev: git]
[coq-cheerios.dev] synchronised (no changes)
coq-cheerios is now pinned to git+https://github.com/uwplse/cheerios.git#9c7f66e57b91f706d70afa8ed99d64ed98ab367 (version dev)

The following actions will be performed:
  ∗ install coq-cheerios dev*
Do you want to continue? [Y/n]
[NOTE] Pinning command successful, but your installed packages may be out of sync.
(iit_synthesis) brando9~ $ opam switch
#  switch    compiler                    description
→  coq-8.10  ocaml-base-compiler.4.07.1  coq-8.10
   default   ocaml.5.0.0                 default

[NOTE] Current switch is set locally through the OPAMSWITCH variable.
       The current global system switch is unset.