tests fail because they call out lua without prefixing LUA_PATH with the path towards the local argparse

[teto]

So I was trying to debug the tests in nixos and I noticed some failing tests because the test could not include argparse.
On gitter @hishamhm said supposedly busted should add ./src/?.lua to your package path automatically (see flag -m). not sure what's going on..
so I added some print commands to busted and indeed it correctly adds argparse.

added path
./src/?.lua;./src/?/?.lua;./src/?/init.lua;/nix/store/1hkmba25rd8niqcx43v513f5f4skr123-lua5.2-busted-2.0.rc13-0/share/lua/5.2/?.lua;/nix/store/1hkmba25rd8niqcx43v513f5f4skr123-lua5.2-busted-2.0.rc13-0/share/lua/5.2/?/init.lua;/nix/store/068gwnrg3a7crk2dyvd4mx5amqy151nh-lua5.2-lua_cliargs-3.0-2/share/lua/5.2/?.lua;/nix/store/068gwnrg3a7crk2dyvd4mx5amqy151nh-lua5.2-lua_cliargs-3.0-2/share/lua/5.2/?/init.lua;/nix/store/x1jy8mgaaplrh9lnwdljjms1ixhmp87b-lua5.2-luasystem-0.2.1-0/share/lua/5.2/?.lua;/nix/store/x1jy8mgaaplrh9lnwdljjms1ixhmp87b-lua5.2-luasystem-0.2.1-0/share/lua/5.2/?/init.lua;/nix/store/dxl491mfb7g5787nccb2z992kyph16lc-lua5.2-dkjson-2.5-2/share/lua/5.2/?.lua;/nix/store/dxl491mfb7g5787nccb2z992kyph16lc-lua5.2-dkjson-2.5-2/share/lua/5.2/?/init.lua;/nix/store/j0kaismxsgzjcrn6c0qqxjd8zmggf77g-lua5.2-say-1.3-1/share/lua/5.2/?.lua;/nix/store/j0kaismxsgzjcrn6c0qqxjd8zmggf77g-lua5.2-say-1.3-1/share/lua/5.2/?/init.lua;/nix/store/kqp96xhqf9zk32ww8h8iasbg8796z0pv-lua5.2-luassert-1.7.11-0/share/lua/5.2/?.lua;/nix/store/kqp96xhqf9zk32ww8h8iasbg8796z0pv-lua5.2-luassert-1.7.11-0/share/lua/5.2/?/init.lua;/nix/store/pkm22p8r5hir4m1qp7cgp8wq7qi0r8lm-lua5.2-lua-term-0.7-1/share/lua/5.2/?.lua;/nix/store/pkm22p8r5hir4m1qp7cgp8wq7qi0r8lm-lua5.2-lua-term-0.7-1/share/lua/5.2/?/init.lua;/nix/store/wjm6nlchlakamzgk5z60rlfiyqb4jbk4-lua5.2-penlight-1.5.4-1/share/lua/5.2/?.lua;/nix/store/wjm6nlchlakamzgk5z60rlfiyqb4jbk4-lua5.2-penlight-1.5.4-1/share/lua/5.2/?/init.lua;/nix/store/43xslh3akjcdjj45v67ngjqsg2v6dw5q-lua5.2-mediator_lua-1.1.2-0/share/lua/5.2/?.lua;/nix/store/43xslh3akjcdjj45v67ngjqsg2v6dw5q-lua5.2-mediator_lua-1.1.2-0/share/lua/5.2/?/init.lua;/nix/store/nkissmc855jii0qnlaszk4f0mjdd9ywk-luarocks-3.3.1/share/lua/5.2/?.lua;/nix/store/nkissmc855jii0qnlaszk4f0mjdd9ywk-luarocks-3.3.1/share/lua/5.2/?/init.lua
●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●◼◼◼●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●◼◼◼◼◼◼◼◼◼◼◼◼◼◼◼●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●
174 successes / 18 failures / 0 errors / 0 pending : 0.114934 seconds

Failure → spec/completion_spec.lua @ 18
tests related to generation of shell completion scripts generates correct bash completion script
spec/completion_spec.lua:19: Expected objects to be equal.
Passed in:
(string) 'lua: ./spec/comptest:3: module 'argparse' not found:
	no field package.preload['argparse']
	no file '/nix/store/1hkmba25rd8niqcx43v513f5f4skr123-lua5.2-busted-2.0.rc13-0/share/lua/5.2/argparse.lua'
	no file '/nix/store/1hkmba25rd8niqcx43v513f5f4skr123-lua5.2-busted-2.0.rc13-0/share/lua/5.2/argparse/init.lua'
	no file '/nix/store/068gwnrg3a7crk2dyvd4mx5amqy151nh-lua5.2-lua_cliargs-3.0-2/share/lua/5.2/argparse.lua'
	no file '/nix/store/068gwnrg3a7crk2dyvd4mx5amqy151nh-lua5.2-lua_cliargs-3.0-2/share/lua/5.2/argparse/init.lua'
	no file '/nix/store/x1jy8mgaaplrh9lnwdljjms1ixhmp87b-lua5.2-luasystem-0.2.1-0/share/lua/5.2/argparse.lua'
	no file '/nix/store/x1jy8mgaaplrh9lnwdljjms1ixhmp87b-lua5.2-luasystem-0.2.1-0/share/lua/5.2/argparse/init.lua'
	no file '/nix/store/dxl491mfb7g5787nccb2z992kyph16lc-lua5.2-dkjson-2.5-2/share/lua/5.2/argparse.lua'
	no file '/nix/store/dxl491mfb7g5787nccb2z992kyph16lc-lua5.2-dkjson-2.5-2/share/lua/5.2/argparse/init.lua'
	no file '/nix/store/j0kaismxsgzjcrn6c0qqxjd8zmggf77g-lua5.2-say-1.3-1/share/lua/5.2/argparse.lua'
	no file '/nix/store/j0kaismxsgzjcrn6c0qqxjd8zmggf77g-lua5.2-say-1.3-1/share/lua/5.2/argparse/init.lua'
	no file '/nix/store/kqp96xhqf9zk32ww8h8iasbg8796z0pv-lua5.2-luassert-1.7.11-0/share/lua/5.2/argparse.lua'
	no file '/nix/store/kqp96xhqf9zk32ww8h8iasbg8796z0pv-lua5.2-luassert-1.7.11-0/share/lua/5.2/argparse/init.lua'
	no file '/nix/store/pkm22p8r5hir4m1qp7cgp8wq7qi0r8lm-lua5.2-lua-term-0.7-1/share/lua/5.2/argparse.lua'
	no file '/nix/store/pkm22p8r5hir4m1qp7cgp8wq7qi0r8lm-lua5.2-lua-term-0.7-1/share/lua/5.2/argparse/init.lua'
	no file '/nix/store/wjm6nlchlakamzgk5z60rlfiyqb4jbk4-lua5.2-penlight-1.5.4-1/share/lua/5.2/argparse.lua'
	no file '/nix/store/wjm6nlchlakamzgk5z60rlfiyqb4jbk4-lua5.2-penlight-1.5.4-1/share/lua/5.2/argparse/init.lua'
	no file '/nix/store/43xslh3akjcdjj45v67ngjqsg2v6dw5q-lua5.2-mediator_lua-1.1.2-0/share/lua/5.2/argparse.lua'
	no file '/nix/store/43xslh3akjcdjj45v67ngjqsg2v6dw5q-lua5.2-mediator_lua-1.1.2-0/share/lua/5.2/argparse/init.lua'
	no file '/nix/store/nkissmc855jii0qnlaszk4f0mjdd9ywk-luarocks-3.3.1/share/lua/5.2/argparse.lua'
	no file '/nix/store/nkissmc855jii0qnlaszk4f0mjdd9ywk-luarocks-3.3.1/share/lua/5.2/argparse/init.lua'
	no file '/nix/store/p9m4q909i71fzazcg3d3ixjfnjad0x9g-lua5.2-luafilesystem-1.7.0-2/lib/lua/5.2/argparse.so'
	no file '/nix/store/x1jy8mgaaplrh9lnwdljjms1ixhmp87b-lua5.2-luasystem-0.2.1-0/lib/lua/5.2/argparse.so'
	no file '/nix/store/pkm22p8r5hir4m1qp7cgp8wq7qi0r8lm-lua5.2-lua-term-0.7-1/lib/lua/5.2/argparse.so'
stack traceback:

the errors happen when it calls out lua spec/test.lua since in that case LUA_PATH doesn't contain the prefixed path for the local argparse. I am not sure how the tests succeed on other platforms, most likely some tests run against an already installed version of argparse.

[daurnimator]

Would the solution be to pass "-e package.path=[[" .. package.path .. "]]" (and the same for cpath?)

Also using arg[0] for script_cmd?