Package: lua5.1-policy
Version: 33
Severity: wishlist
X-Debbugs-CC: debian-de...@lists.debian.org, h...@hisham.hm
Hi,
(Talking about policy, hence CC'ing -devel)
(CC'ing luarocks upstream)
When I'm dealing with one of my ITP's I found that this is
a noticeable problem to Debian's lua packages. And I think
this may require some changes to our lua policy, or the dh-lua
scripts.
Luarocks is a lua module manager, just like pip to python.
However Debian's luarocks is blind to Debian's lua modules,
i.e. `luarocks list` won't list lua modules installed by dpkg,
besides, lua modules installed by dpkg won't participate
lua module dependency resolution, that's bad.
When pulling new lua modules from the internet with `luarocks`,
it will scan lua module dependency and automatically pull missing
modules and install them. For example, I need to install a lua
module that is not packaged by us, say lua-xxx, and it depends
on lua-cjson. Then `luarocks install xxx` will cause luarocks
to install a new lua-cjson module, ignoring the lua-cjson package
installed by dpkg. Why do we provide lua-cjson package?
*** What to do to make improvement? ***
IMHO following changes should be considered:
1. update default configuration file of luarocks
/etc/luarocks/config-5.1.lua
```patch
rocks_trees = {
home..[[/.luarocks]],
[[/usr/local]],
+ [[/usr]],
}
+ deps_mode = 'all'
```
2. let luarocks package install this directory
/usr/lib/luarocks/rocks/
3. update lua-* packages with luarocks integration,
e.g. update their postinst and prerm scripts.
To this point I have a solution that works but is not good enough:
(patch parts copied from my locally modified lua-cjson package)
```patch
--- /dev/null
+++ b/debian/lua-cjson.postinst
@@ -0,0 +1,31 @@
+#!/bin/sh
+set -e
+
+prepare_luarocks ()
+{
+ local rockdir
+ rockdir='/usr/lib/luarocks/rocks/lua-cjson/2.1.0-1/'
+ mkdir -p $rockdir
+ echo 'rock_manifest = {}' > $rockdir/rock_manifest
+ cp /usr/share/doc/lua-cjson/lua-cjson-2.1.0-1.rockspec $rockdir
+ if [ -x /usr/bin/luarocks-admin ]; then
+ luarocks-admin make-manifest --local-tree --tree=/usr
+ fi
+}
[...]
```
and this one
```patch
--- /dev/null
+++ b/debian/lua-cjson.prerm
@@ -0,0 +1,27 @@
+#!/bin/sh
+set -e
+
+remove_luarocks ()
+{
+ if [ -x /usr/bin/luarocks ]; then
+ luarocks remove lua-cjson --local-tree --tree=/usr
+ fi
+}
+
```
Thanks! :-)
--
.''`.
: :' :
`. `'
`-
