1 files changed, 45 insertions, 0 deletions
diff --git a/Modules/ExternalProject/hgclone.cmake.in b/Modules/ExternalProject/hgclone.cmake.in
new file mode 100644
index 0000000..09395cc
--- /dev/null
+++ b/Modules/ExternalProject/hgclone.cmake.in
@@ -0,0 +1,45 @@
+# 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(NOT "@hgclone_infofile@" IS_NEWER_THAN "@hgclone_stampfile@")
+  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()