add package.install_always policy

2 files changed, 7 insertions, 3 deletions

diff --git a/xmake/modules/private/action/require/impl/package.lua b/xmake/modules/private/action/require/impl/package.lua
index 71f75d418..0608a3960 100644
--- a/xmake/modules/private/action/require/impl/package.lua
+++ b/xmake/modules/private/action/require/impl/package.lua
@@ -949,9 +949,9 @@ end
 -- @see https://github.com/xmake-io/xmake/issues/2719
 function _compatible_with_previous_librarydeps(package, opt)
 
-    -- skip to check compatibility?
+    -- skip to check compatibility if installation has been finished
     opt = opt or {}
-    if opt.check_compatibility == false then
+    if opt.install_finished then
         return true
     end
 
@@ -1036,9 +1036,13 @@ end
 
 -- this package should be install?
 function should_install(package, opt)
+    opt = opt or {}
     if package:is_template() then
         return false
     end
+    if not opt.install_finished and package:policy("package.install_always") then
+        return true
+    end
     if package:exists() and _compatible_with_previous_librarydeps(package, opt) then
         return false
     end
diff --git a/xmake/modules/private/action/require/install.lua b/xmake/modules/private/action/require/install.lua
index f6d02717e..ee5e56f95 100644
--- a/xmake/modules/private/action/require/install.lua
+++ b/xmake/modules/private/action/require/install.lua
@@ -35,7 +35,7 @@ function _check_missing_packages(packages)
     local packages_missing = {}
     local optional_missing = {}
     for _, instance in ipairs(packages) do
-        if package.should_install(instance, {check_compatibility = false}) or (instance:is_fetchonly() and not instance:exists()) then
+        if package.should_install(instance, {install_finished = true}) or (instance:is_fetchonly() and not instance:exists()) then
             if instance:is_optional() then
                 optional_missing[instance:name()] = instance
             else