1 files changed, 64 insertions, 0 deletions
diff --git a/lua/mason-core/pep440/init.lua b/lua/mason-core/pep440/init.lua
new file mode 100644
index 00000000..0141c501
--- /dev/null
+++ b/lua/mason-core/pep440/init.lua
@@ -0,0 +1,64 @@
+-- Function to split a version string into its components
+local function split_version(version)
+    local parts = {}
+    for part in version:gmatch "[^.]+" do
+        table.insert(parts, tonumber(part) or part)
+    end
+    return parts
+end
+
+-- Function to compare two versions
+local function compare_versions(version1, version2)
+    local v1_parts = split_version(version1)
+    local v2_parts = split_version(version2)
+    local len = math.max(#v1_parts, #v2_parts)
+
+    for i = 1, len do
+        local v1_part = v1_parts[i] or 0
+        local v2_part = v2_parts[i] or 0
+
+        if v1_part < v2_part then
+            return -1
+        elseif v1_part > v2_part then
+            return 1
+        end
+    end
+
+    return 0
+end
+
+-- Function to check a version against a single specifier
+local function check_single_specifier(version, specifier)
+    local operator, spec_version = specifier:match "^([<>=!]+)%s*(.+)$"
+    local comp_result = compare_versions(version, spec_version)
+
+    if operator == "==" then
+        return comp_result == 0
+    elseif operator == "!=" then
+        return comp_result ~= 0
+    elseif operator == "<=" then
+        return comp_result <= 0
+    elseif operator == "<" then
+        return comp_result < 0
+    elseif operator == ">=" then
+        return comp_result >= 0
+    elseif operator == ">" then
+        return comp_result > 0
+    else
+        error("Invalid operator in version specifier: " .. operator)
+    end
+end
+
+-- Function to check a version against multiple specifiers
+local function check_version(version, specifiers)
+    for specifier in specifiers:gmatch "[^,]+" do
+        if not check_single_specifier(version, specifier:match "^%s*(.-)%s*$") then
+            return false
+        end
+    end
+    return true
+end
+
+return {
+    check_version = check_version,
+}