Print to json directly rather than depend on yojson and a ppx.
Note: this should be tested with the website in order to validate that the Json
output is 1-to-1.
(a second step could be to simplify this output, now that it's manual)
Always generate the version through git when possible, and encode that within
the binaries so that `catala --version` does'nt give misleading information.
Previously we used dune's builtin functionality, but that resorts to a hack at
install time which is unpleasant and doesn't work with our use of `opam
install`.
The cost is a re-linking of catala_utils and the binaries upon git commit, which
is hardly noticeable.
There is trouble with CI because it needs bash, and apparently the upgrade also
leads to conflicts between yojson and its ppx (which is where the dependecy upon
base lies)
Changelog:
---
A lot has been going on, with more than 530 patches and 70 PRs merged since
0.7.0 last summer. In summary:
- Quite a lot of syntax improvements and changes. Checkout the latest
[cheat-sheet](https://catalalang.github.io/catala/syntax.pdf) for an overview
- Allow local `let ... equals ... in ...` definitions
- Better error messages and positions throughout
- Added the ability to directly call a scope and retrieve its outputs, like a
function
- Added disambiguation, allowing to access structure fields without specifying
the structure type each time
- Added automated resolution of operators, allowing e.g. to write just `+` in
place of all the type-specific operators `+.`, `+$`, `+@`, `+^`, etc.
- More consistent priority for operators. It is no longer allowed to write `a
and b or c` without parenthesis.
- Added and changed some operators (`date + duration` now allowed either way,
`int / int` now returns a decimal, added `duration / duration`)
- Added the ability to have variables and functions defined at
top-level (outside of any scope). See annex A of the tutorial for details.
- Added support for functions with multiple arguments
- Some big refactors in the compiler, allowing much better code sharing between
the different passes, and making it much easier to extend. Also added the
possibility to run the type-checker earlier, etc.
- Countless bug-fixes
- Improvements to our proof backend with Z3
- A tool to automatically synchronise with the upstream French law from
Legifrance
This version of OCaml introduces [let-punning](https://v2.ocaml.org/manual/bindingops.html#ss:letops-punning)
It is just syntactic sugar, but OCamlformat makes use of it, without a configuration option, when the OCaml version permits.
This means that the same version of OCamlformat gives different results depending on the underlying OCaml version. Our options, if we want to keep the forced-format policy on the repository, are therefore:
- to disable it whenever binding operators are used (with this PR that's a lot of places, and this becomes too cumbersome, besides defeating the purpose)
- to force devs to use an earlier version of OCaml so that reformatting outputs something compatible
- to bump the minimum OCaml requirement
The latter is the simplest, but it can be reviewed if compatibility is required. Last option would be to report the issue to OCamlformat and hope that they provide a workaround...
