Re: Writing scripts that are compatible with Lua 5.1, 5.2, and 5.3?

[François Perrad <francois.perrad@...>]

2017-03-14 5:57 GMT+01:00 Paul Merrell <marbux@gmail.com>:
> On Mon, Mar 13, 2017 at 4:37 AM, tomas <tomas@tecgraf.puc-rio.br> wrote:
>
>> I wrote that page as the result of my effort in adapting some libraries to
>> work in all those Lua versions.  Recently I only worked in LuaSQL drivers
>> (for Lua 5.3) and there were no adaptations needed, so I had nothing to add
>> to the page...
>
> Thanks, Tomas. I'll link the page.
>
> Best regards,
>
> Paul
>

The next step is to test this compatibility.
The current best tool/helper is `hererocks`
(https://github.com/mpeterv/hererocks)
which allows to build several variants of Lua (with its own luarocks)

Here, few examples:
    $ hererocks Lua-5.1             --lua 5.1    --compat default
--luarocks latest

    $ hererocks Lua-5.2             --lua 5.2    --compat default
--luarocks latest
    $ hererocks Lua-5.2-strict      --lua 5.2    --compat none
--luarocks latest

    $ hererocks Lua-5.3             --lua 5.3    --compat default
--luarocks latest
    $ hererocks Lua-5.3-strict      --lua 5.3    --compat none
--luarocks latest
    $ hererocks Lua-5.3-noconv      --lua 5.3    --compat default
--cflags="-DLUA_NOCVTN2S -DLUA_NOCVTS2N" --luarocks latest
    $ hererocks Lua-5.3-32bits      --lua 5.3    --compat default
--cflags="-DLUA_32BITS" --luarocks latest
    $ hererocks Lua-5.3-longdouble  --lua 5.3    --compat default
--cflags="-DLUA_FLOAT_TYPE=3" --luarocks latest

    $ hererocks LuaJIT-2.0          --luajit 2.0 --compat default
--luarocks latest
    $ hererocks LuaJIT-2.0-compat52 --luajit 2.0 --compat all
--luarocks latest

    $ hererocks LuaJIT-2.1          --luajit 2.1 --compat default
--luarocks latest
    $ hererocks LuaJIT-2.1-compat52 --luajit 2.1 --compat all
--luarocks latest

Variants without compat allows to detect issue with the next version.

Sadly, the current release (2.4.2) of luarocks doesn't support the
Lua-5.3-noconv
(see https://github.com/luarocks/luarocks/issues/682).

Variants with alternate number are not always relevant.

`hererocks` plays with continous integration, like CI Travis.
See my template of .travis.yml, for each line of `env`, a build is done.

François

----8<---------- .travis.yml ----------------------------------------------
language: python
sudo: false

env:
  - LUA="lua 5.1"       COMPAT=default  CFLAGS=""
  - LUA="lua 5.2"       COMPAT=default  CFLAGS=""
  - LUA="lua 5.2"       COMPAT=none     CFLAGS=""
  - LUA="lua 5.3"       COMPAT=default  CFLAGS=""
  - LUA="lua 5.3"       COMPAT=none     CFLAGS=""
  - LUA="lua 5.3"       COMPAT=default  CFLAGS="-DLUA_NOCVTN2S -DLUA_NOCVTS2N"
  - LUA="lua 5.3"       COMPAT=default  CFLAGS="-DLUA_32BITS"
  - LUA="lua 5.3"       COMPAT=default  CFLAGS="-DLUA_FLOAT_TYPE=3"
  - LUA="luajit 2.0"    COMPAT=none     CFLAGS=""
  - LUA="luajit 2.0"    COMPAT=all      CFLAGS=""
  - LUA="luajit 2.1"    COMPAT=none     CFLAGS=""
  - LUA="luajit 2.1"    COMPAT=all      CFLAGS=""

before_install:
  - pip install hererocks
  - hererocks HERE --$LUA --compat $COMPAT --cflags="$CFLAGS"
--no-readline --luarocks latest --verbose
  - hererocks HERE --show
  - source HERE/bin/activate

install:
  - luarocks install luacheck
  - luarocks install other_dependency

script:
  - luacheck on_your_code
  - run your_test_suite
----8<---------------------------------------------------------------------


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