-- Convenience Lua functions that can be used within Python srpm/rpm macros
-- Determine alternate names provided from the given name.
-- Used in pythonname provides generator, python_provide and py_provides.
-- If only_3_to_3_X is false/nil/unused there are 2 rules:
-- python3-foo -> python-foo, python3.X-foo
-- python3.X-foo -> python-foo, python3-foo
-- If only_3_to_3_X is true there is only 1 rule:
-- python3-foo -> python3X-foo
-- There is no python-foo -> rule, python-foo packages are version agnostic.
-- Returns a table/array with strings. Empty when no rule matched.
local function python_altnames(name, only_3_to_3_X)
local xy
if only_3_to_3_X then
-- Here we hardcode the xy prefix we want to obsolete to "39", because:
-- 1. Python 3.9 will remain the main Python version in RHEL 9
-- 2. python39 in RHEL 8 is still using the dotless naming (as opposed to
-- python3.9)
xy = "39"
else
xy = rpm.expand('%{__default_python3_pkgversion}')
end
local altnames = {}
local replaced
-- NB: dash needs to be escaped!
if name:match('^python3%-') then
local prefixes = only_3_to_3_X and {} or {'python-'}
for i, prefix in ipairs({'python' .. xy .. '-', table.unpack(prefixes)}) do
replaced = name:gsub('^python3%-', prefix)
table.insert(altnames, replaced)
end
elseif name:match('^python' .. xy .. '%-') and not only_3_to_3_X then
for i, prefix in ipairs({'python-', 'python3-'}) do
replaced = name:gsub('^python' .. xy .. '%-', prefix)
table.insert(altnames, replaced)
end
end
return altnames
end
local function __python_alttags(name, evr, tag_type)
-- for the "provides" tag_type we want also unversioned provides
local only_3_to_3_X = tag_type ~= "provides"
local operator = tag_type == "provides" and ' = ' or ' < '
-- global cache that tells what package NEVRs were already processed for the
-- given tag type
if __python_alttags_beenthere == nil then
__python_alttags_beenthere = {}
end
if __python_alttags_beenthere[tag_type] == nil then
__python_alttags_beenthere[tag_type] = {}
end
__python_alttags_beenthere[tag_type][name .. ' ' .. evr] = true
local alttags = {}
for i, altname in ipairs(python_altnames(name, only_3_to_3_X)) do
table.insert(alttags, altname .. operator .. evr)
end
return alttags
end
-- For any given name and epoch-version-release, return provides except self.
-- Uses python_altnames under the hood
-- Returns a table/array with strings.
local function python_altprovides(name, evr)
return __python_alttags(name, evr, "provides")
end
-- For any given name and epoch-version-release, return versioned obsoletes except self.
-- Uses python_altnames under the hood
-- Returns a table/array with strings.
local function python_altobsoletes(name, evr)
return __python_alttags(name, evr, "obsoletes")
end
local function __python_alttags_once(name, evr, tag_type)
-- global cache that tells what provides were already processed
if __python_alttags_beenthere == nil
or __python_alttags_beenthere[tag_type] == nil
or __python_alttags_beenthere[tag_type][name .. ' ' .. evr] == nil then
return __python_alttags(name, evr, tag_type)
else
return nil
end
end
-- Like python_altprovides but only return something once.
-- For each argument can only be used once, returns nil otherwise.
-- Previous usage of python_altprovides counts as well.
local function python_altprovides_once(name, evr)
return __python_alttags_once(name, evr, "provides")
end
-- Like python_altobsoletes but only return something once.
-- For each argument can only be used once, returns nil otherwise.
-- Previous usage of python_altobsoletes counts as well.
local function python_altobsoletes_once(name, evr)
return __python_alttags_once(name, evr, "obsoletes")
end
return {
python_altnames = python_altnames,
python_altprovides = python_altprovides,
python_altobsoletes = python_altobsoletes,
python_altprovides_once = python_altprovides_once,
python_altobsoletes_once = python_altobsoletes_once,
}
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