From d9021ad4c05a4f968979d948ab40aa9dd89a363f Mon Sep 17 00:00:00 2001
From: Jérôme Leclercq <lynix680@gmail.com>
Date: Wed, 8 Sep 2021 14:27:20 +0200
Subject: Improve install

---
 xmake/modules/target/action/install/unix.lua    | 20 ++++++++++++++------
 xmake/modules/target/action/install/windows.lua | 19 ++++++++++++++-----
 2 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/xmake/modules/target/action/install/unix.lua b/xmake/modules/target/action/install/unix.lua
index ae06ed3bc..521ed40de 100644
--- a/xmake/modules/target/action/install/unix.lua
+++ b/xmake/modules/target/action/install/unix.lua
@@ -37,15 +37,23 @@ end
 
 -- install shared libraries for package
 function _install_shared_for_package(target, pkg, outputdir)
+    _g.installed_libfiles = _g.installed_libfiles or {}
     for _, sopath in ipairs(table.wrap(pkg:get("libfiles"))) do
         if sopath:endswith(".so") or sopath:match(".+%.so%..+$") or sopath:endswith(".dylib") then
-            local soname = path.filename(sopath)
-            if os.isfile(path.join(outputdir, soname)) then
-                wprint("'%s' already exists in install dir, overwriting it from package(%s).", soname, pkg:name())
+            -- prevent packages using the same system libfiles from overwriting each other
+            if not _g.installed_libfiles[sopath] then
+                local soname = path.filename(sopath)
+                local targetname = path.join(outputdir, soname)
+                if os.isfile(targetname) then
+                    wprint("'%s' already exists in install dir, overwriting it from package(%s).", soname, pkg:name())
+                    -- rm because symlink cannot overwrite existing file
+                    os.rm(targetname)
+                end
+                -- we need reserve symlink
+                -- @see https://github.com/xmake-io/xmake/issues/1582
+                os.vcp(sopath, outputdir, {symlink = true})
+                _g.installed_libfiles[sopath] = true
             end
-            -- we need reserve symlink
-            -- @see https://github.com/xmake-io/xmake/issues/1582
-            os.vcp(sopath, outputdir, {symlink = true})
         end
     end
 end
diff --git a/xmake/modules/target/action/install/windows.lua b/xmake/modules/target/action/install/windows.lua
index dfb8d2bd3..609e87389 100644
--- a/xmake/modules/target/action/install/windows.lua
+++ b/xmake/modules/target/action/install/windows.lua
@@ -40,13 +40,18 @@ end
 
 -- install shared libraries for package
 function _install_shared_for_package(target, pkg, outputdir)
+    _g.installed_dllfiles = _g.installed_dllfiles or {}
     for _, dllpath in ipairs(table.wrap(pkg:get("libfiles"))) do
         if dllpath:endswith(".dll") then
-            local dllname = path.filename(dllpath)
-            if os.isfile(path.join(outputdir, dllname)) then
-                wprint("'%s' already exists in install dir, overwriting it from package(%s).", dllname, pkg:name())
+            -- prevent packages using the same libfiles from overwriting each other
+            if not _g.installed_dllfiles[dllpath] then
+                local dllname = path.filename(dllpath)
+                if os.isfile(path.join(outputdir, dllname)) then
+                    wprint("'%s' already exists in install dir, overwriting it from package(%s).", dllname, pkg:name())
+                end
+                os.vcp(dllpath, outputdir)
+                _g.installed_dllfiles[dllpath] = true
             end
-            os.vcp(dllpath, outputdir)
         end
     end
 end
@@ -74,11 +79,15 @@ function install_binary(target, opt)
 
     -- install the dependent shared/windows (*.dll) target
     -- @see https://github.com/xmake-io/xmake/issues/961
+    _g.installed_dllfiles = _g.installed_dllfiles or {}
     for _, dep in ipairs(target:orderdeps()) do
         if dep:kind() == "shared" then
             local depfile = dep:targetfile()
             if os.isfile(depfile) then
-                os.vcp(depfile, binarydir)
+                if not _g.installed_dllfiles[depfile] then
+                    os.vcp(depfile, binarydir)
+                    _g.installed_dllfiles[depfile] = true
+                end
             end
         end
         -- install all shared libraries in packages in all deps
-- 
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