feat: add nix support

1 files changed, 70 insertions, 0 deletions

diff --git a/xmake/modules/detect/tools/find_nix.lua b/xmake/modules/detect/tools/find_nix.lua
new file mode 100644
index 000000000..33a056320
--- /dev/null
+++ b/xmake/modules/detect/tools/find_nix.lua
@@ -0,0 +1,70 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+-- Copyright (C) 2015-present, Xmake Open Source Community.
+--
+-- @author      ruki
+-- @file        find_nix.lua
+--
+
+-- imports
+import("lib.detect.find_program")
+import("lib.detect.find_programver")
+
+-- find nix
+--
+-- @param opt   the argument options, e.g. {version = true}
+--
+-- @return      program, version
+--
+-- @code
+--
+-- local nix = find_nix()
+-- local nix, version = find_nix({version = true})
+--
+-- @endcode
+--
+function main(opt)
+    -- init options
+    opt = opt or {}
+    
+    -- add common nix installation paths if no specific program is given
+    if not opt.program then
+        opt.paths = opt.paths or {}
+        local nix_paths = {
+            "/nix/var/nix/profiles/default/bin", -- multi-user installation
+            "/home/" .. (os.getenv("USER") or "user") .. "/.nix-profile/bin", -- single user installation
+            "/run/current-system/sw/bin", -- only on nixos, maybe separate nix logic from nixos logic?
+            "/usr/local/bin", -- default path of nix when compiling nix from source
+        }
+        
+        for _, nixpath in ipairs(nix_paths) do
+            table.insert(opt.paths, nixpath)
+        end
+    end
+    
+    -- find program
+    local program = find_program(opt.program or "nix", opt)
+    
+    -- find program version
+    local version = nil
+    if program and opt and opt.version then
+        version = find_programver(program, opt, function (output)
+            -- parse version from "nix (Nix) 2.18.1" format
+            return output:match("nix %(Nix%) ([%d%.]+)")
+        end)
+    end
+    
+    return program, version
+end
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