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-rw-r--r--libbuild2/cc/windows-manifest.cxx143
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diff --git a/libbuild2/cc/windows-manifest.cxx b/libbuild2/cc/windows-manifest.cxx
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+// file : libbuild2/cc/windows-manifest.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license : MIT; see accompanying LICENSE file
+
+#include <libbuild2/scope.hxx>
+#include <libbuild2/target.hxx>
+#include <libbuild2/context.hxx>
+#include <libbuild2/variable.hxx>
+#include <libbuild2/filesystem.hxx>
+#include <libbuild2/diagnostics.hxx>
+
+#include <libbuild2/cc/link-rule.hxx>
+
+using namespace std;
+using namespace butl;
+
+namespace build2
+{
+ namespace cc
+ {
+ // Translate the compiler target CPU value to the processorArchitecture
+ // attribute value.
+ //
+ const char*
+ windows_manifest_arch (const string& tcpu)
+ {
+ const char* pa (tcpu == "i386" || tcpu == "i686" ? "x86" :
+ tcpu == "x86_64" ? "amd64" :
+ nullptr);
+
+ if (pa == nullptr)
+ fail << "unable to translate CPU " << tcpu << " to manifest "
+ << "processor architecture";
+
+ return pa;
+ }
+
+ // Generate a Windows manifest and if necessary create/update the manifest
+ // file corresponding to the exe{} target. Return the manifest file path
+ // and its timestamp if unchanged or timestamp_nonexistent otherwise.
+ //
+ pair<path, timestamp> link_rule::
+ windows_manifest (const file& t, bool rpath_assembly) const
+ {
+ tracer trace (x, "link_rule::windows_manifest");
+
+ const scope& rs (t.root_scope ());
+
+ const char* pa (windows_manifest_arch (cast<string> (rs[x_target_cpu])));
+
+ string m;
+
+ m += "<?xml version='1.0' encoding='UTF-8' standalone='yes'?>\n";
+ m += "<assembly xmlns='urn:schemas-microsoft-com:asm.v1'\n";
+ m += " manifestVersion='1.0'>\n";
+
+ // Program name, version, etc.
+ //
+ string name (t.path ().leaf ().string ());
+
+ m += " <assemblyIdentity name='"; m += name; m += "'\n";
+ m += " type='win32'\n";
+ m += " processorArchitecture='"; m += pa; m += "'\n";
+ m += " version='0.0.0.0'/>\n";
+
+ // Our rpath-emulating assembly.
+ //
+ if (rpath_assembly)
+ {
+ m += " <dependency>\n";
+ m += " <dependentAssembly>\n";
+ m += " <assemblyIdentity name='"; m += name; m += ".dlls'\n";
+ m += " type='win32'\n";
+ m += " processorArchitecture='"; m += pa; m += "'\n";
+ m += " language='*'\n";
+ m += " version='0.0.0.0'/>\n";
+ m += " </dependentAssembly>\n";
+ m += " </dependency>\n";
+ }
+
+ // UAC information. Without it Windows will try to guess, which, as you
+ // can imagine, doesn't end well.
+ //
+ m += " <trustInfo xmlns='urn:schemas-microsoft-com:asm.v3'>\n";
+ m += " <security>\n";
+ m += " <requestedPrivileges>\n";
+ m += " <requestedExecutionLevel level='asInvoker' uiAccess='false'/>\n";
+ m += " </requestedPrivileges>\n";
+ m += " </security>\n";
+ m += " </trustInfo>\n";
+
+ m += "</assembly>\n";
+
+ // If the manifest file exists, compare to its content. If nothing
+ // changed (common case), then we can avoid any further updates.
+ //
+ // The potentially faster alternative would be to hash it and store an
+ // entry in depdb. This, however, gets a bit complicated since we will
+ // need to avoid a race between the depdb and .manifest updates.
+ //
+ path mf (t.path () + ".manifest");
+
+ timestamp mt (mtime (mf));
+
+ if (mt != timestamp_nonexistent)
+ {
+ try
+ {
+ ifdstream is (mf);
+ if (is.read_text () == m)
+ return make_pair (move (mf), mt);
+ }
+ catch (const io_error&)
+ {
+ // Whatever the reason we failed for, let's rewrite the file.
+ }
+ }
+
+ if (verb >= 3)
+ text << "cat >" << mf;
+
+ if (!t.ctx.dry_run)
+ {
+ auto_rmfile rm (mf);
+
+ try
+ {
+ ofdstream os (mf);
+ os << m;
+ os.close ();
+ rm.cancel ();
+
+ }
+ catch (const io_error& e)
+ {
+ fail << "unable to write to " << mf << ": " << e;
+ }
+ }
+
+ return make_pair (move (mf), timestamp_nonexistent);
+ }
+ }
+}