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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindHg
# ------
#
# Extract information from a mercurial working copy.
#
# The module defines the following variables:
#
# ::
#
# HG_EXECUTABLE - path to mercurial command line client (hg)
# HG_FOUND - true if the command line client was found
# HG_VERSION_STRING - the version of mercurial found
#
# If the command line client executable is found the following macro is defined:
#
# ::
#
# HG_WC_INFO(<dir> <var-prefix>)
#
# Hg_WC_INFO extracts information of a mercurial working copy
# at a given location. This macro defines the following variables:
#
# ::
#
# <var-prefix>_WC_CHANGESET - current changeset
# <var-prefix>_WC_REVISION - current revision
#
# Example usage:
#
# ::
#
# find_package(Hg)
# if(HG_FOUND)
# message("hg found: ${HG_EXECUTABLE}")
# HG_WC_INFO(${PROJECT_SOURCE_DIR} Project)
# message("Current revision is ${Project_WC_REVISION}")
# message("Current changeset is ${Project_WC_CHANGESET}")
# endif()
find_program(HG_EXECUTABLE
NAMES hg
PATHS
[HKEY_LOCAL_MACHINE\\Software\\TortoiseHG]
PATH_SUFFIXES Mercurial
DOC "hg command line client"
)
mark_as_advanced(HG_EXECUTABLE)
if(HG_EXECUTABLE)
set(_saved_lc_all "$ENV{LC_ALL}")
set(ENV{LC_ALL} "C")
set(_saved_language "$ENV{LANGUAGE}")
set(ENV{LANGUAGE})
execute_process(COMMAND ${HG_EXECUTABLE} --version
OUTPUT_VARIABLE hg_version
ERROR_QUIET
RESULT_VARIABLE hg_result
OUTPUT_STRIP_TRAILING_WHITESPACE)
set(ENV{LC_ALL} ${_saved_lc_all})
set(ENV{LANGUAGE} ${_saved_language})
if(hg_result MATCHES "is not a valid Win32 application")
set_property(CACHE HG_EXECUTABLE PROPERTY VALUE "HG_EXECUTABLE-NOTFOUND")
endif()
if(hg_version MATCHES "^Mercurial Distributed SCM \\(version ([0-9][^)]*)\\)")
set(HG_VERSION_STRING "${CMAKE_MATCH_1}")
endif()
unset(hg_version)
macro(HG_WC_INFO dir prefix)
execute_process(COMMAND ${HG_EXECUTABLE} id -i -n
WORKING_DIRECTORY ${dir}
RESULT_VARIABLE hg_id_result
ERROR_VARIABLE hg_id_error
OUTPUT_VARIABLE ${prefix}_WC_DATA
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(NOT ${hg_id_result} EQUAL 0)
message(SEND_ERROR "Command \"${HG_EXECUTBALE} id -n\" in directory ${dir} failed with output:\n${hg_id_error}")
endif()
string(REGEX REPLACE "([0-9a-f]+)\\+? [0-9]+\\+?" "\\1" ${prefix}_WC_CHANGESET ${${prefix}_WC_DATA})
string(REGEX REPLACE "[0-9a-f]+\\+? ([0-9]+)\\+?" "\\1" ${prefix}_WC_REVISION ${${prefix}_WC_DATA})
endmacro(HG_WC_INFO)
endif()
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
find_package_handle_standard_args(Hg
REQUIRED_VARS HG_EXECUTABLE
VERSION_VAR HG_VERSION_STRING)
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