ExternalData: Allow DATA{} syntax to reference directories

Use a trailing slash to reference a directory.  Require that a list
of associated files be specified to select from within the directory.
One may simply use DATA{Dir/,REGEX:.*} to reference all files but
get a directory passed on the command line.

14 files changed, 48 insertions, 2 deletions

diff --git a/Tests/Module/ExternalData/CMakeLists.txt b/Tests/Module/ExternalData/CMakeLists.txt
index 5532610..c9a192b 100644
--- a/Tests/Module/ExternalData/CMakeLists.txt
+++ b/Tests/Module/ExternalData/CMakeLists.txt
@@ -24,6 +24,7 @@ ExternalData_Add_Test(Data1
     -D SeriesDn=DATA{SeriesDn-1.dat,:}
     -D Paired=DATA{PairedA.dat,PairedB.dat}
     -D Meta=DATA{MetaTop.dat,REGEX:Meta[ABC].dat}
+    -D Directory=DATA{Directory/,A.dat,REGEX:[BC].dat}
     -P ${CMAKE_CURRENT_SOURCE_DIR}/Data1Check.cmake
   )
 ExternalData_Add_Target(Data1)
diff --git a/Tests/Module/ExternalData/Data1Check.cmake b/Tests/Module/ExternalData/Data1Check.cmake
index fd18cdf..972ec46 100644
--- a/Tests/Module/ExternalData/Data1Check.cmake
+++ b/Tests/Module/ExternalData/Data1Check.cmake
@@ -38,3 +38,9 @@ foreach(n Top A B C)
     message(SEND_ERROR "Input file:\n  ${file}\ndoes not exist!")
   endif()
 endforeach()
+foreach(n A B C)
+  set(file "${Directory}/${n}.dat")
+  if(NOT EXISTS "${file}")
+    message(SEND_ERROR "Input file:\n  ${file}\ndoes not exist!")
+  endif()
+endforeach()
diff --git a/Tests/Module/ExternalData/Directory/A.dat.md5 b/Tests/Module/ExternalData/Directory/A.dat.md5
new file mode 100644
index 0000000..4a78fc7
--- /dev/null
+++ b/Tests/Module/ExternalData/Directory/A.dat.md5
@@ -0,0 +1 @@
+9d980b06c2f0fec3d4872d68175b9822
diff --git a/Tests/Module/ExternalData/Directory/B.dat.md5 b/Tests/Module/ExternalData/Directory/B.dat.md5
new file mode 100644
index 0000000..4557a21
--- /dev/null
+++ b/Tests/Module/ExternalData/Directory/B.dat.md5
@@ -0,0 +1 @@
+8f4add4581551facf27237e6577fd662
diff --git a/Tests/Module/ExternalData/Directory/C.dat.md5 b/Tests/Module/ExternalData/Directory/C.dat.md5
new file mode 100644
index 0000000..a7f23dd
--- /dev/null
+++ b/Tests/Module/ExternalData/Directory/C.dat.md5
@@ -0,0 +1 @@
+c1030719c95f3435d8abc39c0d442946
diff --git a/Tests/RunCMake/ExternalData/Directory2-stderr.txt b/Tests/RunCMake/ExternalData/Directory2-stderr.txt
index dc1a59a..92c9a2f 100644
--- a/Tests/RunCMake/ExternalData/Directory2-stderr.txt
+++ b/Tests/RunCMake/ExternalData/Directory2-stderr.txt
@@ -1,9 +1,9 @@
 CMake Error at .*/Modules/ExternalData.cmake:[0-9]+ \(message\):
-  Data file reference in argument
+  Data directory referenced by argument
 
     DATA{Directory2/}
 
-  may not end in a slash!
+  must list associated files.
 Call Stack \(most recent call first\):
   .*
   Directory2.cmake:3 \(ExternalData_Add_Test\)
diff --git a/Tests/RunCMake/ExternalData/Directory4-result.txt b/Tests/RunCMake/ExternalData/Directory4-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/ExternalData/Directory4-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/ExternalData/Directory4-stderr.txt b/Tests/RunCMake/ExternalData/Directory4-stderr.txt
new file mode 100644
index 0000000..dcb8522
--- /dev/null
+++ b/Tests/RunCMake/ExternalData/Directory4-stderr.txt
@@ -0,0 +1,6 @@
+CMake Error at .*/Modules/ExternalData.cmake:[0-9]+ \(message\):
+  Series option ":" not allowed with directories.
+Call Stack \(most recent call first\):
+  .*
+  Directory4.cmake:3 \(ExternalData_Add_Test\)
+  CMakeLists.txt:3 \(include\)
diff --git a/Tests/RunCMake/ExternalData/Directory4.cmake b/Tests/RunCMake/ExternalData/Directory4.cmake
new file mode 100644
index 0000000..7d3d638
--- /dev/null
+++ b/Tests/RunCMake/ExternalData/Directory4.cmake
@@ -0,0 +1,6 @@
+include(CTest)
+include(ExternalData)
+ExternalData_Add_Test(Data
+  NAME Test
+  COMMAND ${CMAKE_COMMAND} -E echo DATA{Directory4/,:}
+  )
diff --git a/Tests/RunCMake/ExternalData/Directory4/DirData4.txt b/Tests/RunCMake/ExternalData/Directory4/DirData4.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/Tests/RunCMake/ExternalData/Directory4/DirData4.txt
diff --git a/Tests/RunCMake/ExternalData/Directory5-result.txt b/Tests/RunCMake/ExternalData/Directory5-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/ExternalData/Directory5-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/ExternalData/Directory5-stderr.txt b/Tests/RunCMake/ExternalData/Directory5-stderr.txt
new file mode 100644
index 0000000..8e54aec
--- /dev/null
+++ b/Tests/RunCMake/ExternalData/Directory5-stderr.txt
@@ -0,0 +1,14 @@
+CMake Error at .*/Modules/ExternalData.cmake:[0-9]+ \(message\):
+  Data directory referenced by argument
+
+    DATA{Directory5/}
+
+  corresponds to source tree path
+
+    Directory5
+
+  that does not exist as a directory!
+Call Stack \(most recent call first\):
+  .*
+  Directory5.cmake:3 \(ExternalData_Add_Test\)
+  CMakeLists.txt:3 \(include\)
diff --git a/Tests/RunCMake/ExternalData/Directory5.cmake b/Tests/RunCMake/ExternalData/Directory5.cmake
new file mode 100644
index 0000000..931589e
--- /dev/null
+++ b/Tests/RunCMake/ExternalData/Directory5.cmake
@@ -0,0 +1,6 @@
+include(CTest)
+include(ExternalData)
+ExternalData_Add_Test(Data
+  NAME Test
+  COMMAND ${CMAKE_COMMAND} -E echo DATA{Directory5/}
+  )
diff --git a/Tests/RunCMake/ExternalData/RunCMakeTest.cmake b/Tests/RunCMake/ExternalData/RunCMakeTest.cmake
index c61527e..fc85a21 100644
--- a/Tests/RunCMake/ExternalData/RunCMakeTest.cmake
+++ b/Tests/RunCMake/ExternalData/RunCMakeTest.cmake
@@ -9,6 +9,8 @@ run_cmake(BadSeries3)
 run_cmake(Directory1)
 run_cmake(Directory2)
 run_cmake(Directory3)
+run_cmake(Directory4)
+run_cmake(Directory5)
 run_cmake(LinkContentMD5)
 run_cmake(MissingData)
 run_cmake(NoLinkInSource)