1 files changed, 84 insertions, 0 deletions
diff --git a/libbuild2/install/operation.cxx b/libbuild2/install/operation.cxx
new file mode 100644
index 0000000..1135ad6
--- /dev/null
+++ b/libbuild2/install/operation.cxx
@@ -0,0 +1,84 @@
+// file      : libbuild2/install/operation.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <libbuild2/install/operation.hxx>
+
+using namespace std;
+using namespace butl;
+
+namespace build2
+{
+  namespace install
+  {
+    static operation_id
+    install_pre (const values& params, meta_operation_id mo, const location& l)
+    {
+      if (!params.empty ())
+        fail (l) << "unexpected parameters for operation install";
+
+      // Run update as a pre-operation, unless we are disfiguring.
+      //
+      return mo != disfigure_id ? update_id : 0;
+    }
+
+    // Note that we run both install and uninstall serially. The reason for
+    // this is all the fuzzy things we are trying to do like removing empty
+    // outer directories if they are empty. If we do this in parallel, then
+    // those things get racy. Also, since all we do here is creating/removing
+    // files, there is not going to be much speedup from doing it in parallel.
+
+    const operation_info op_install {
+      install_id,
+      0,
+      "install",
+      "install",
+      "installing",
+      "installed",
+      "has nothing to install", // We cannot "be installed".
+      execution_mode::first,
+      0,
+      &install_pre,
+      nullptr
+    };
+
+    // Note that we run update as a pre-operation, just like install. Which
+    // may seem bizarre at first. We do it to obtain the exact same dependency
+    // graph as install so that we uninstall exactly the same set of files as
+    // install would install. Note that just matching the rules without
+    // executing them may not be enough: for example, a presence of an ad hoc
+    // group member may only be discovered after executing the rule (e.g., VC
+    // link.exe only creates a DLL's import library if there are any exported
+    // symbols).
+    //
+    const operation_info op_uninstall {
+      uninstall_id,
+      0,
+      "uninstall",
+      "uninstall",
+      "uninstalling",
+      "uninstalled",
+      "is not installed",
+      execution_mode::last,
+      0,
+      &install_pre,
+      nullptr
+    };
+
+    // Also the explicit update-for-install operation alias.
+    //
+    const operation_info op_update_for_install {
+      update_id, // Note: not update_for_install_id.
+      install_id,
+      op_update.name,
+      op_update.name_do,
+      op_update.name_doing,
+      op_update.name_did,
+      op_update.name_done,
+      op_update.mode,
+      op_update.concurrency,
+      op_update.pre,
+      op_update.post
+    };
+  }
+}