Squashed 'third_party/ceres/' content from commit e51e9b4
Change-Id: I763587619d57e594d3fa158dc3a7fe0b89a1743b
git-subtree-dir: third_party/ceres
git-subtree-split: e51e9b46f6ca88ab8b2266d0e362771db6d98067
diff --git a/cmake/AddGerritCommitHook.cmake b/cmake/AddGerritCommitHook.cmake
new file mode 100644
index 0000000..65b2fab
--- /dev/null
+++ b/cmake/AddGerritCommitHook.cmake
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+# Ceres Solver - A fast non-linear least squares minimizer
+# Copyright 2015 Google Inc. All rights reserved.
+# http://ceres-solver.org/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice,
+# this list of conditions and the following disclaimer in the documentation
+# and/or other materials provided with the distribution.
+# * Neither the name of Google Inc. nor the names of its contributors may be
+# used to endorse or promote products derived from this software without
+# specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: keir@google.com (Keir Mierle)
+# alexs.mac@gmail.com (Alex Stewart)
+
+# Set up the git hook to make Gerrit Change-Id: lines in commit messages.
+function(ADD_GERRIT_COMMIT_HOOK SOURCE_DIR BINARY_DIR)
+ if (NOT (EXISTS ${SOURCE_DIR} AND IS_DIRECTORY ${SOURCE_DIR}))
+ message(FATAL_ERROR "Specified SOURCE_DIR: ${SOURCE_DIR} does not exist, "
+ "or is not a directory, cannot add Gerrit commit hook.")
+ endif()
+ if (NOT (EXISTS ${BINARY_DIR} AND IS_DIRECTORY ${BINARY_DIR}))
+ message(FATAL_ERROR "Specified BINARY_DIR: ${BINARY_DIR} does not exist, "
+ "or is not a directory, cannot add Gerrit commit hook.")
+ endif()
+ unset (LOCAL_GIT_DIRECTORY)
+ if (EXISTS ${SOURCE_DIR}/.git)
+ if (IS_DIRECTORY ${SOURCE_DIR}/.git)
+ # .git directory can be found on Unix based system, or on Windows with
+ # Git Bash (shipped with msysgit).
+ set (LOCAL_GIT_DIRECTORY ${SOURCE_DIR}/.git)
+ else(IS_DIRECTORY ${SOURCE_DIR}/.git)
+ # .git is a file, this means Ceres is a git submodule of another project
+ # and our .git file contains the path to the git directory which manages
+ # Ceres, so we should add the gerrit hook there.
+ file(READ ${SOURCE_DIR}/.git GIT_SUBMODULE_FILE_CONTENTS)
+ # Strip any trailing newline characters, s/t we get a valid path.
+ string(REGEX REPLACE "gitdir:[ ]*([^$].*)[\n].*" "${SOURCE_DIR}/\\1"
+ GIT_SUBMODULE_GIT_DIRECTORY_PATH "${GIT_SUBMODULE_FILE_CONTENTS}")
+ get_filename_component(GIT_SUBMODULE_GIT_DIRECTORY_PATH
+ "${GIT_SUBMODULE_GIT_DIRECTORY_PATH}" ABSOLUTE)
+ if (EXISTS ${GIT_SUBMODULE_GIT_DIRECTORY_PATH}
+ AND IS_DIRECTORY ${GIT_SUBMODULE_GIT_DIRECTORY_PATH})
+ set(LOCAL_GIT_DIRECTORY "${GIT_SUBMODULE_GIT_DIRECTORY_PATH}")
+ endif()
+ endif()
+ else (EXISTS ${SOURCE_DIR}/.git)
+ # TODO(keir) Add proper Windows support.
+ endif (EXISTS ${SOURCE_DIR}/.git)
+
+ if (EXISTS ${LOCAL_GIT_DIRECTORY})
+ if (NOT EXISTS ${LOCAL_GIT_DIRECTORY}/hooks/commit-msg)
+ message(STATUS "Detected Ceres being used as a git submodule, adding "
+ "commit hook for Gerrit to: ${LOCAL_GIT_DIRECTORY}")
+ # Download the hook only if it is not already present.
+ file(DOWNLOAD https://ceres-solver-review.googlesource.com/tools/hooks/commit-msg
+ ${BINARY_DIR}/commit-msg)
+
+ # Make the downloaded file executable, since it is not by default.
+ file(COPY ${BINARY_DIR}/commit-msg
+ DESTINATION ${LOCAL_GIT_DIRECTORY}/hooks/
+ FILE_PERMISSIONS
+ OWNER_READ OWNER_WRITE OWNER_EXECUTE
+ GROUP_READ GROUP_WRITE GROUP_EXECUTE
+ WORLD_READ WORLD_EXECUTE)
+ endif (NOT EXISTS ${LOCAL_GIT_DIRECTORY}/hooks/commit-msg)
+ endif (EXISTS ${LOCAL_GIT_DIRECTORY})
+endfunction()