Initial commit

.gitignore

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+/luarocks
+/lua
+/lua_modules
+/.luarocks

LICENSE

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+MIT License
+
+Copyright (c) 2021 A. Orlenko
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

luarocks-build-rust-mlua-dev-1.rockspec

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+rockspec_format = "3.0"
+package = "luarocks-build-rust-mlua"
+version = "dev-1"
+
+source = {
+    url = "git+https://github.com/khvzak/luarocks-build-rust-mlua",
+}
+
+description = {
+    summary = "A LuaRocks build backend for Lua modules written in Rust using mlua",
+    homepage = "https://github.com/khvzak/luarocks-build-rust-mlua",
+    license = "MIT",
+}

src/luarocks/build/rust-mlua.lua

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+local fs = require("luarocks.fs")
+local cfg = require("luarocks.core.cfg")
+local dir = require("luarocks.dir")
+local path = require("luarocks.path")
+
+local mlua = {}
+
+function mlua.run(rockspec, no_install)
+    assert(rockspec:type() == "rockspec")
+
+    if not fs.is_tool_available("cargo", "Cargo") then
+        return nil, "'cargo' is not installed.\n" .. "This rock is written in Rust: make sure you have a Rust\n" ..
+            "development environment installed and try again."
+    end
+
+    local features = {}
+    local lua_version = cfg.lua_version
+    local variables = rockspec.variables
+
+    -- Activate features depending on Lua version
+    if (cfg.cache or {}).luajit_version ~= nil then
+        table.insert(features, "luajit")
+    elseif lua_version == "5.4" then
+        table.insert(features, "lua54")
+    elseif lua_version == "5.3" then
+        table.insert(features, "lua53")
+    elseif lua_version == "5.2" then
+        table.insert(features, "lua52")
+    elseif lua_version == "5.1" then
+        table.insert(features, "lua51")
+    else
+        return nil, "Lua version " .. lua_version .. " is not supported"
+    end
+
+    local envs = {}
+    local lua_incdir, lua_h = variables.LUA_INCDIR, "lua.h"
+    local found_lua_h = fs.exists(dir.path(lua_incdir, lua_h))
+    if not cfg.is_platform("windows") then
+        -- If lua.h does not exists, add "vendored" feature (probably this is impossible case)
+        if found_lua_h then
+            envs["LUA_INC"] = variables.LUA_INCDIR
+        else
+            table.insert(features, "vendored")
+        end
+    else
+        -- For windows we must ensure that lua.h exists
+        if not found_lua_h then
+            return nil, "Lua header file " .. lua_h .. " not found (looked in " .. lua_incdir .. "). \n" ..
+                "You need to install the Lua development package for your system."
+        end
+        local lualib = variables.LUALIB
+        lualib = string.gsub(lualib, "%.lib$", "")
+        lualib = string.gsub(lualib, "%.dll$", "")
+        envs["LUA_INC"] = variables.LUA_INCDIR
+        envs["LUA_LIB"] = variables.LUA_LIBDIR
+        envs["LUA_LIB_NAME"] = lualib
+    end
+
+    local features_arg = table.concat(features, ",")
+    if not fs.execute_env(envs, "cargo build --release --features " .. features_arg) then
+        return nil, "Failed building."
+    end
+
+    if rockspec.build and rockspec.build.modules and not (no_install) then
+        local libdir = path.lib_dir(rockspec.name, rockspec.version)
+
+        fs.make_dir(dir.dir_name(libdir))
+        for _, mod in ipairs(rockspec.build.modules) do
+            local rustlib = "lib" .. mod .. "." .. cfg.external_lib_extension
+            if cfg.is_platform("windows") then
+                rustlib = mod .. "." .. cfg.external_lib_extension
+            end
+            local src = dir.path("target", "release", rustlib)
+            local dst = dir.path(libdir, mod .. "." .. cfg.lib_extension)
+
+            local ok, err = fs.copy(src, dst, "exec")
+            if not ok then
+                return nil, "Failed installing " .. src .. " in " .. dst .. ": " .. err
+            end
+        end
+    end
+
+    return true
+end
+
+return mlua