install: Allow generator expressions in DIRECTORY

Teach install(DIRECTORY) to support generator expressions in the list
of directories, much like install(FILES) already supports.

Help/command/install.rst

@@ -271,9 +271,10 @@ will install the ``icons`` directory to ``share/myproj/icons`` and the
 file permissions, the scripts will be given specific permissions, and any
 ``CVS`` directories will be excluded.
 
-The install destination given to the directory install ``DESTINATION`` may
+The list of ``dirs...`` given to ``DIRECTORY`` and the install destination
-use "generator expressions" with the syntax ``$<...>``.  See the
+given to the directory install ``DESTINATION`` may use "generator expressions"
-:manual:`cmake-generator-expressions(7)` manual for available expressions.
+with the syntax ``$<...>``.  See the :manual:`cmake-generator-expressions(7)`
+manual for available expressions.
 
 Custom Installation Logic
 ^^^^^^^^^^^^^^^^^^^^^^^^^

Help/release/dev/install-DIRECTORY-genex.rst

@@ -0,0 +1,6 @@
+install-DIRECTORY-genex
+-----------------------
+
+* The :command:`install(DIRECTORY)` command learned to support
+  :manual:`generator expressions <cmake-generator-expressions(7)>`
+  in the list of directories.

Source/cmInstallDirectoryGenerator.cxx

@@ -36,6 +36,16 @@ cmInstallDirectoryGenerator
     {
     this->ActionsPerConfig = true;
     }
+
+  // We need per-config actions if any directories have generator expressions.
+  for(std::vector<std::string>::const_iterator i = dirs.begin();
+      !this->ActionsPerConfig && i != dirs.end(); ++i)
+    {
+    if(cmGeneratorExpression::Find(*i) != std::string::npos)
+      {
+      this->ActionsPerConfig = true;
+      }
+    }
 }
 
 //----------------------------------------------------------------------------
@@ -60,7 +70,7 @@ cmInstallDirectoryGenerator::GenerateScriptActions(std::ostream& os,
     }
   else
     {
-    this->AddDirectoryInstallRule(os, "", indent);
+    this->AddDirectoryInstallRule(os, "", indent, this->Directories);
     }
 }
 
@@ -69,20 +79,30 @@ void cmInstallDirectoryGenerator::GenerateScriptForConfig(
   const std::string& config,
   Indent const& indent)
 {
-  this->AddDirectoryInstallRule(os, config, indent);
+  std::vector<std::string> dirs;
+  cmGeneratorExpression ge;
+  for(std::vector<std::string>::const_iterator i = this->Directories.begin();
+      i != this->Directories.end(); ++i)
+    {
+    cmsys::auto_ptr<cmCompiledGeneratorExpression> cge = ge.Parse(*i);
+    cmSystemTools::ExpandListArgument(cge->Evaluate(
+        this->LocalGenerator, config), dirs);
+    }
+  this->AddDirectoryInstallRule(os, config, indent, dirs);
 }
 
 void cmInstallDirectoryGenerator::AddDirectoryInstallRule(
   std::ostream& os,
   const std::string& config,
-  Indent const& indent)
+  Indent const& indent,
+  std::vector<std::string> const& dirs)
 {
   // Write code to install the directories.
   const char* no_rename = 0;
   this->AddInstallRule(os,
                        this->GetDestination(config),
                        cmInstallType_DIRECTORY,
-                       this->Directories,
+                       dirs,
                        this->Optional,
                        this->FilePermissions.c_str(),
                        this->DirPermissions.c_str(),

Source/cmInstallDirectoryGenerator.h

@@ -42,7 +42,8 @@ protected:
                                        Indent const& indent);
   void AddDirectoryInstallRule(std::ostream& os,
                                const std::string& config,
-                               Indent const& indent);
+                               Indent const& indent,
+                               std::vector<std::string> const& dirs);
   cmLocalGenerator* LocalGenerator;
   std::vector<std::string> Directories;
   std::string FilePermissions;

Tests/ExportImport/Export/CMakeLists.txt

@@ -551,5 +551,5 @@ install(
   ARCHIVE DESTINATION lib
   INCLUDES DESTINATION include/abs
   )
-install(DIRECTORY include/abs DESTINATION $<1:include>$<0:/wrong>)
+install(DIRECTORY $<1:include/abs>$<0:/wrong> DESTINATION $<1:include>$<0:/wrong>)
 install(EXPORT expAbs NAMESPACE expAbs_ DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/expAbs)

Tests/RunCMake/install/DIRECTORY-DIRECTORY-bad-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/install/DIRECTORY-DIRECTORY-bad-stderr.txt

@@ -0,0 +1,6 @@
+CMake Error:
+  Error evaluating generator expression:
+
+    \$<NOTAGENEX>
+
+  Expression did not evaluate to a known generator expression

Tests/RunCMake/install/DIRECTORY-DIRECTORY-bad.cmake

@@ -0,0 +1 @@
+install(DIRECTORY $<NOTAGENEX> DESTINATION .)

Tests/RunCMake/install/RunCMakeTest.cmake

@@ -6,6 +6,7 @@ run_cmake(DIRECTORY-message-lazy)
 run_cmake(SkipInstallRulesWarning)
 run_cmake(SkipInstallRulesNoWarning1)
 run_cmake(SkipInstallRulesNoWarning2)
+run_cmake(DIRECTORY-DIRECTORY-bad)
 run_cmake(DIRECTORY-DESTINATION-bad)
 run_cmake(FILES-DESTINATION-bad)
 run_cmake(TARGETS-DESTINATION-bad)

Tests/SimpleInstall/CMakeLists.txt

@@ -252,7 +252,7 @@ else()
   file(REMOVE_RECURSE "${CMAKE_INSTALL_PREFIX}/MyTest/share/CVS")
   file(REMOVE_RECURSE "${CMAKE_INSTALL_PREFIX}/MyTest/share/TestSubDir/CVS")
   install(
-    DIRECTORY TestSubDir scripts/ DESTINATION $<1:MyTest/share>$<0:/wrong>
+    DIRECTORY TestSubDir $<1:scripts/>$<0:/wrong> DESTINATION $<1:MyTest/share>$<0:/wrong>
     FILE_PERMISSIONS OWNER_READ OWNER_WRITE
     DIRECTORY_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE
                           GROUP_READ GROUP_EXECUTE
@@ -263,7 +263,7 @@ else()
 
   # Alternate directory installation for coverage.
   install(
-    DIRECTORY scripts/ DESTINATION $<1:MyTest/share/alt>$<0:/wrong>
+    DIRECTORY $<1:scripts/>$<0:/wrong> DESTINATION $<1:MyTest/share/alt>$<0:/wrong>
     COMPONENT Development
     USE_SOURCE_PERMISSIONS
     PATTERN "CVS" EXCLUDE

Tests/SimpleInstallS2/CMakeLists.txt

@@ -252,7 +252,7 @@ else()
   file(REMOVE_RECURSE "${CMAKE_INSTALL_PREFIX}/MyTest/share/CVS")
   file(REMOVE_RECURSE "${CMAKE_INSTALL_PREFIX}/MyTest/share/TestSubDir/CVS")
   install(
-    DIRECTORY TestSubDir scripts/ DESTINATION $<1:MyTest/share>$<0:/wrong>
+    DIRECTORY TestSubDir $<1:scripts/>$<0:/wrong> DESTINATION $<1:MyTest/share>$<0:/wrong>
     FILE_PERMISSIONS OWNER_READ OWNER_WRITE
     DIRECTORY_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE
                           GROUP_READ GROUP_EXECUTE
@@ -263,7 +263,7 @@ else()
 
   # Alternate directory installation for coverage.
   install(
-    DIRECTORY scripts/ DESTINATION $<1:MyTest/share/alt>$<0:/wrong>
+    DIRECTORY $<1:scripts/>$<0:/wrong> DESTINATION $<1:MyTest/share/alt>$<0:/wrong>
     COMPONENT Development
     USE_SOURCE_PERMISSIONS
     PATTERN "CVS" EXCLUDE