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doc/lua.section.md: update lua documentation

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Matthieu Coudron 2024-02-14 21:27:57 +01:00
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doc/languages-frameworks/lua.section.md
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@ -1,8 +1,8 @@
# User’s Guide to Lua Infrastructure {#users-guide-to-lua-infrastructure}
# Lua {#lua}
## Using Lua {#using-lua}
## Using Lua {#lua-userguide}
### Overview of Lua {#overview-of-lua}
### Overview of Lua {#lua-overview}
Several versions of the Lua interpreter are available: luajit, lua 5.1, 5.2, 5.3.
The attribute `lua` refers to the default interpreter, it is also possible to refer to specific versions, e.g. `lua5_2` refers to Lua 5.2.
@ -118,7 +118,7 @@ Again, it is possible to launch the interpreter from the shell.
The Lua interpreter has the attribute `pkgs` which contains all Lua libraries for that specific interpreter.
## Developing with Lua {#developing-with-lua}
## Developing with lua {#lua-developing}
Now that you know how to get a working Lua environment with Nix, it is time
to go forward and start actually developing with Lua. There are two ways to
@ -234,30 +234,20 @@ The `lua.withPackages` takes a function as an argument that is passed the set of
Using the `withPackages` function, the previous example for the luafilesystem environment can be written like this:
```nix
with import <nixpkgs> {};
lua.withPackages (ps: [ps.luafilesystem])
```
`withPackages` passes the correct package set for the specific interpreter version as an argument to the function. In the above example, `ps` equals `luaPackages`.
But you can also easily switch to using `lua5_2`:
But you can also easily switch to using `lua5_1`:
```nix
with import <nixpkgs> {};
lua5_2.withPackages (ps: [ps.lua])
lua5_1.withPackages (ps: [ps.lua])
```
Now, `ps` is set to `lua52Packages`, matching the version of the interpreter.
Now, `ps` is set to `lua5_1.pkgs`, matching the version of the interpreter.
### Possible Todos {#possible-todos}
* export/use version specific variables such as `LUA_PATH_5_2`/`LUAROCKS_CONFIG_5_2`
* let luarocks check for dependencies via exporting the different rocktrees in temporary config
### Lua Contributing guidelines {#lua-contributing-guidelines}
### Lua Contributing guidelines {#lua-contributing}
Following rules should be respected:
* Make sure libraries build for all Lua interpreters.
* Commit names of Lua libraries should reflect that they are Lua libraries, so write for example `luaPackages.luafilesystem: 1.11 -> 1.12`.