1 files changed, 82 insertions, 0 deletions
diff --git a/xmake/modules/private/action/require/packagenv.lua b/xmake/modules/private/action/require/packagenv.lua
new file mode 100644
index 000000000..dd95eff7e
--- /dev/null
+++ b/xmake/modules/private/action/require/packagenv.lua
@@ -0,0 +1,82 @@
+--!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 - 2019, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        packagenv.lua
+--
+
+-- imports
+import("core.package.package", {alias = "core_package"})
+
+-- enter the package environments
+function _enter_package(package_name, envs, installdir)
+
+    -- save the old environments
+    _g._OLDENVS = _g._OLDENVS or {}
+    local oldenvs = _g._OLDENVS[package_name]
+    if not oldenvs then
+        oldenvs = {}
+        _g._OLDENVS[package_name] = oldenvs
+    end
+
+    -- add the new environments
+    oldenvs.PATH = os.getenv("PATH") 
+    for name, values in pairs(envs) do
+        oldenvs[name] = oldenvs[name] or os.getenv(name)
+        if name == "PATH" then
+            for _, value in ipairs(values) do
+                if path.is_absolute(value) then
+                    os.addenv(name, value)
+                else
+                    os.addenv(name, path.join(installdir, value))
+                end
+            end
+        else
+            os.addenv(name, unpack(table.wrap(values)))
+        end
+    end
+end
+
+-- leave the package environments
+function _leave_package(package_name)
+    _g._OLDENVS = _g._OLDENVS or {}
+    local oldenvs = _g._OLDENVS[package_name]
+    if oldenvs then
+        for name, values in pairs(oldenvs) do
+            os.setenv(name, values)
+        end
+        _g._OLDENVS[package_name] = nil
+    end
+end
+
+-- enter environment of the given binary packages, git, 7z, ..
+function enter(...)
+    for _, name in ipairs({...}) do
+        for _, manifest_file in ipairs(os.files(path.join(core_package.installdir(), name:sub(1, 1), name, "*", "*", "manifest.txt"))) do
+            local manifest = io.load(manifest_file) 
+            if manifest and manifest.plat == os.host() and manifest.arch == os.arch() then
+                _enter_package(name, manifest.envs, path.directory(manifest_file))
+            end
+        end
+    end
+end
+
+-- leave environment of the given binary packages, git, 7z, ..
+function leave(...)
+    for _, name in ipairs({...}) do
+        _leave_package(name)
+    end
+end