5 files changed, 207 insertions, 0 deletions
diff --git a/Modules/ExternalProject/cfgcmd.txt.in b/Modules/ExternalProject/cfgcmd.txt.in
new file mode 100644
index 0000000..b3f09ef
--- /dev/null
+++ b/Modules/ExternalProject/cfgcmd.txt.in
@@ -0,0 +1 @@
+cmd='@cmd@'
diff --git a/Modules/ExternalProject/extractfile.cmake.in b/Modules/ExternalProject/extractfile.cmake.in
new file mode 100644
index 0000000..d7f5756
--- /dev/null
+++ b/Modules/ExternalProject/extractfile.cmake.in
@@ -0,0 +1,65 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.5)
+
+# Make file names absolute:
+#
+get_filename_component(filename "@filename@" ABSOLUTE)
+get_filename_component(directory "@directory@" ABSOLUTE)
+
+message(STATUS "extracting...
+     src='${filename}'
+     dst='${directory}'"
+)
+
+if(NOT EXISTS "${filename}")
+  message(FATAL_ERROR "File to extract does not exist: '${filename}'")
+endif()
+
+# Prepare a space for extracting:
+#
+set(i 1234)
+while(EXISTS "${directory}/../ex-@name@${i}")
+  math(EXPR i "${i} + 1")
+endwhile()
+set(ut_dir "${directory}/../ex-@name@${i}")
+file(MAKE_DIRECTORY "${ut_dir}")
+
+# Extract it:
+#
+message(STATUS "extracting... [tar @args@]")
+execute_process(COMMAND ${CMAKE_COMMAND} -E tar @args@ ${filename}
+  WORKING_DIRECTORY ${ut_dir}
+  RESULT_VARIABLE rv
+)
+
+if(NOT rv EQUAL 0)
+  message(STATUS "extracting... [error clean up]")
+  file(REMOVE_RECURSE "${ut_dir}")
+  message(FATAL_ERROR "Extract of '${filename}' failed")
+endif()
+
+# Analyze what came out of the tar file:
+#
+message(STATUS "extracting... [analysis]")
+file(GLOB contents "${ut_dir}/*")
+list(REMOVE_ITEM contents "${ut_dir}/.DS_Store")
+list(LENGTH contents n)
+if(NOT n EQUAL 1 OR NOT IS_DIRECTORY "${contents}")
+  set(contents "${ut_dir}")
+endif()
+
+# Move "the one" directory to the final directory:
+#
+message(STATUS "extracting... [rename]")
+file(REMOVE_RECURSE ${directory})
+get_filename_component(contents ${contents} ABSOLUTE)
+file(RENAME ${contents} ${directory})
+
+# Clean up:
+#
+message(STATUS "extracting... [clean up]")
+file(REMOVE_RECURSE "${ut_dir}")
+
+message(STATUS "extracting... done")
diff --git a/Modules/ExternalProject/gitclone.cmake.in b/Modules/ExternalProject/gitclone.cmake.in
new file mode 100644
index 0000000..3312171
--- /dev/null
+++ b/Modules/ExternalProject/gitclone.cmake.in
@@ -0,0 +1,73 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.5)
+
+if(EXISTS "@gitclone_stampfile@" AND EXISTS "@gitclone_infofile@" AND
+  "@gitclone_stampfile@" IS_NEWER_THAN "@gitclone_infofile@")
+  message(STATUS
+    "Avoiding repeated git clone, stamp file is up to date: "
+    "'@gitclone_stampfile@'"
+  )
+  return()
+endif()
+
+execute_process(
+  COMMAND ${CMAKE_COMMAND} -E rm -rf "@source_dir@"
+  RESULT_VARIABLE error_code
+)
+if(error_code)
+  message(FATAL_ERROR "Failed to remove directory: '@source_dir@'")
+endif()
+
+# try the clone 3 times in case there is an odd git clone issue
+set(error_code 1)
+set(number_of_tries 0)
+while(error_code AND number_of_tries LESS 3)
+  execute_process(
+    COMMAND "@git_EXECUTABLE@" @git_options@
+            clone @git_clone_options@ "@git_repository@" "@src_name@"
+    WORKING_DIRECTORY "@work_dir@"
+    RESULT_VARIABLE error_code
+  )
+  math(EXPR number_of_tries "${number_of_tries} + 1")
+endwhile()
+if(number_of_tries GREATER 1)
+  message(STATUS "Had to git clone more than once: ${number_of_tries} times.")
+endif()
+if(error_code)
+  message(FATAL_ERROR "Failed to clone repository: '@git_repository@'")
+endif()
+
+execute_process(
+  COMMAND "@git_EXECUTABLE@" @git_options@
+          checkout "@git_tag@" @git_checkout_explicit--@
+  WORKING_DIRECTORY "@work_dir@/@src_name@"
+  RESULT_VARIABLE error_code
+)
+if(error_code)
+  message(FATAL_ERROR "Failed to checkout tag: '@git_tag@'")
+endif()
+
+set(init_submodules @init_submodules@)
+if(init_submodules)
+  execute_process(
+    COMMAND "@git_EXECUTABLE@" @git_options@
+            submodule update @git_submodules_recurse@ --init @git_submodules@
+    WORKING_DIRECTORY "@work_dir@/@src_name@"
+    RESULT_VARIABLE error_code
+  )
+endif()
+if(error_code)
+  message(FATAL_ERROR "Failed to update submodules in: '@work_dir@/@src_name@'")
+endif()
+
+# Complete success, update the script-last-run stamp file:
+#
+execute_process(
+  COMMAND ${CMAKE_COMMAND} -E copy "@gitclone_infofile@" "@gitclone_stampfile@"
+  RESULT_VARIABLE error_code
+)
+if(error_code)
+  message(FATAL_ERROR "Failed to copy script-last-run stamp file: '@gitclone_stampfile@'")
+endif()
diff --git a/Modules/ExternalProject/hgclone.cmake.in b/Modules/ExternalProject/hgclone.cmake.in
new file mode 100644
index 0000000..e2b55ba
--- /dev/null
+++ b/Modules/ExternalProject/hgclone.cmake.in
@@ -0,0 +1,49 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.5)
+
+if(EXISTS "@hgclone_stampfile@" AND EXISTS "@hgclone_infofile@" AND
+  "@hgclone_stampfile@" IS_NEWER_THAN "@hgclone_infofile@")
+  message(STATUS
+    "Avoiding repeated hg clone, stamp file is up to date: "
+    "'@hgclone_stampfile@'"
+  )
+  return()
+endif()
+
+execute_process(
+  COMMAND ${CMAKE_COMMAND} -E rm -rf "@source_dir@"
+  RESULT_VARIABLE error_code
+)
+if(error_code)
+  message(FATAL_ERROR "Failed to remove directory: '@source_dir@'")
+endif()
+
+execute_process(
+  COMMAND "@hg_EXECUTABLE@" clone -U "@hg_repository@" "@src_name@"
+  WORKING_DIRECTORY "@work_dir@"
+  RESULT_VARIABLE error_code
+)
+if(error_code)
+  message(FATAL_ERROR "Failed to clone repository: '@hg_repository@'")
+endif()
+
+execute_process(
+  COMMAND "@hg_EXECUTABLE@" update @hg_tag@
+  WORKING_DIRECTORY "@work_dir@/@src_name@"
+  RESULT_VARIABLE error_code
+)
+if(error_code)
+  message(FATAL_ERROR "Failed to checkout tag: '@hg_tag@'")
+endif()
+
+# Complete success, update the script-last-run stamp file:
+#
+execute_process(
+  COMMAND ${CMAKE_COMMAND} -E copy "@hgclone_infofile@" "@hgclone_stampfile@"
+  RESULT_VARIABLE error_code
+)
+if(error_code)
+  message(FATAL_ERROR "Failed to copy script-last-run stamp file: '@hgclone_stampfile@'")
+endif()
diff --git a/Modules/ExternalProject/mkdirs.cmake.in b/Modules/ExternalProject/mkdirs.cmake.in
new file mode 100644
index 0000000..d30a2e7
--- /dev/null
+++ b/Modules/ExternalProject/mkdirs.cmake.in
@@ -0,0 +1,19 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.5)
+
+file(MAKE_DIRECTORY
+  "@source_dir@"
+  "@binary_dir@"
+  "@install_dir@"
+  "@tmp_dir@"
+  "@stamp_dir@"
+  "@download_dir@"
+  "@log_dir@"
+)
+
+set(configSubDirs @CMAKE_CONFIGURATION_TYPES@)
+foreach(subDir IN LISTS configSubDirs)
+    file(MAKE_DIRECTORY "@stamp_dir@/${subDir}")
+endforeach()