The code says:
if basename == "rockspec" then
name = "rockspec"
else
name = basename:match("(.*)%.rockspec")
if not name and not basename == "rockspec" then
return nil, "Filename '"..filename.."' does not look like a rockspec."
end
end
The clause `not basename == "rockspec"` is parsed as
`(not basename)=="rockspec"`, which is always false.
The intention clearly is `not(basename == "rockspec")`
or `basename ~= "rockspec`.
However, that clause is useless since if it is true, the branch is
never reached. Thus, the test can merely be `if not name`.
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