ENH: First draft of add_external_project functionality. Tweaks, dashboard fixing, more tests and documentation certain to follow as it gets used by others...

1 files changed, 94 insertions, 0 deletions

diff --git a/Modules/UntarFile.cmake b/Modules/UntarFile.cmake
new file mode 100644
index 0000000..9aa218f
--- /dev/null
+++ b/Modules/UntarFile.cmake
@@ -0,0 +1,94 @@
+#
+# Use 'cmake -Dfilename=${tar_or_tgz_file} -Dtmp=${tmp_directory} -Ddirectory=${final_directory}
+#   -P UntarFile.cmake' to call this script...
+#
+if(NOT DEFINED filename)
+  message(FATAL_ERROR "error: required variable 'filename' not defined...")
+endif()
+
+if(NOT DEFINED tmp)
+  message(FATAL_ERROR "error: required variable 'tmp' not defined...")
+endif()
+
+if(NOT DEFINED directory)
+  message(FATAL_ERROR "error: required variable 'directory' not defined...")
+endif()
+
+if(NOT DEFINED args)
+  if(filename MATCHES ".tar$")
+    set(args xf)
+  endif()
+
+  if(filename MATCHES ".tgz$")
+    set(args xfz)
+  endif()
+
+  if(filename MATCHES ".tar.gz$")
+    set(args xfz)
+  endif()
+endif()
+
+
+# Make file names absolute:
+#
+get_filename_component(filename "${filename}" ABSOLUTE)
+get_filename_component(tmp "${tmp}" ABSOLUTE)
+get_filename_component(directory "${directory}" ABSOLUTE)
+
+
+# Prepare a space for untarring:
+#
+#message(STATUS "info: creating empty subdir of '${tmp}'...")
+set(i 1)
+while(EXISTS "${tmp}/untar${i}")
+  math(EXPR i "${i} + 1")
+endwhile()
+set(ut_dir "${tmp}/untar${i}")
+file(MAKE_DIRECTORY "${ut_dir}")
+
+
+# Untar it:
+#
+#message(STATUS "info: untarring '${filename}' in '${ut_dir}' with '${args}'...")
+execute_process(COMMAND ${CMAKE_COMMAND} -E tar ${args} ${filename}
+  WORKING_DIRECTORY ${ut_dir}
+  RESULT_VARIABLE rv)
+
+if(NOT rv EQUAL 0)
+  message(FATAL_ERROR "error: untar of '${filename}' failed")
+endif()
+
+
+# Analyze what came out of the tar file:
+#
+file(GLOB contents "${ut_dir}/*")
+
+set(is_one_directory 0)
+list(LENGTH contents n)
+if(n EQUAL 1)
+  if(IS_DIRECTORY "${contents}")
+    set(is_one_directory 1)
+  endif()
+endif()
+
+
+# Copy "the one" directory to the final directory:
+#
+if(is_one_directory EQUAL 1)
+  #message(STATUS "info: (1) copying '${contents}' to '${directory}'...")
+  execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory "${contents}" "${directory}"
+    RESULT_VARIABLE rv)
+else()
+  #message(STATUS "info: (more) copying '${ut_dir}' to '${directory}'...")
+  execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory "${ut_dir}" "${directory}"
+    RESULT_VARIABLE rv)
+endif()
+
+if(NOT rv EQUAL 0)
+  message(FATAL_ERROR "error: copy_directory failed after untar in '${ut_dir}'")
+endif()
+
+
+# Clean up:
+#
+file(REMOVE_RECURSE "${ut_dir}")