- Use separate functions for successive passes in module `Driver.Passes`
- Use other functions for end results printing in module `Driver.Commands`
As a consequence, it is much more flexible to use by plugins or libs and we no
longer need the complex polymorphic variant parameter.
This patch leverages previous changes to use Cmdliner subcommands and
effectively specialises the flags of each Catala subcommand.
Other changes include:
- an attempt to normalise the generic options and reduce the number of global
references. Some are ok, like `debug` ; some would better be further cleaned up,
e.g. the ones used by Proof backend were moved to a `Proof.globals` module and
need discussion. The printer no longer relies on the global languages and prints
money amounts in an agnostic way.
- the plugin directory is automatically guessed and loaded even in dev setups.
Plugins are shown by the main `catala` command and listed in `catala --help`
- exception catching at the toplevel has been refactored a bit as well; return
codes are normalised to follow the manpage and avoid codes >= 128 that are
generally reserved for shells.
Update tests
The upside of this is that each command can define specific flags ; there is a
small loss of backwards-compatibility in that the command needs to be the first
argument.
`catala --help` will now only show a summary of commands, with more specific
manpages shown on `catala CMD --help`.
Another point is that the plugin interface is extended to allow plugins to be
registered as subcommands and have their own flags (this will be very useful for
adding flags to the lazy/dot/explanation plugin that has many options).
Note that no efforts has yet been made to specialise the options, the previous
type was just made global for all subcommands.
This is a hack, but not a dirty one: a new command `catala pygmentize` is added,
which is just a wrapper around `pygmentize` that calls it with the proper lexers
defined.
The point is that this needs no installation, just a stock `pygmentize`
installation and the `catala` binary.
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
Fixes#378
- the plugins are compiled as libraries rather than with `executable`, so that
dune is able to install them
- they get installed to `lib/catala/plugins/<plugin-name>/<plugin-name>.cmxs`
- the lookup for plugins is now recursive to cope with the plugin subdirectories
in the point above
