Move version build system module to separate library

1 files changed, 52 insertions, 0 deletions

diff --git a/libbuild2/version/rule.hxx b/libbuild2/version/rule.hxx
new file mode 100644
index 0000000..ce21aa4
--- /dev/null
+++ b/libbuild2/version/rule.hxx
@@ -0,0 +1,52 @@
+// file      : libbuild2/version/rule.hxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef LIBBUILD2_VERSION_RULE_HXX
+#define LIBBUILD2_VERSION_RULE_HXX
+
+#include <libbuild2/types.hxx>
+#include <libbuild2/utility.hxx>
+
+#include <libbuild2/install/rule.hxx>
+
+#include <libbuild2/in/rule.hxx>
+
+namespace build2
+{
+  namespace version
+  {
+    // Preprocess an .in file that depends on manifest.
+    //
+    class in_rule: public in::rule
+    {
+    public:
+      in_rule (): rule ("version.in 2", "version.in") {}
+
+      virtual bool
+      match (action, target&, const string&) const override;
+
+      virtual string
+      lookup (const location&,
+              action,
+              const target&,
+              const string&) const override;
+    };
+
+    // Pre-process manifest before installation to patch in the version.
+    //
+    class manifest_install_rule: public install::file_rule
+    {
+    public:
+      manifest_install_rule () {}
+
+      virtual bool
+      match (action, target&, const string&) const override;
+
+      virtual auto_rmfile
+      install_pre (const file&, const install_dir&) const override;
+    };
+  }
+}
+
+#endif // LIBBUILD2_VERSION_RULE_HXX