CMake/Modules/FindTclsh.cmake

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Simplify CMake per-source license notices Per-source copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong. Precise contributor information is already maintained automatically by the version control tool. Ultimately it is the receiver of a file who is responsible for determining its licensing status, and per-source notices are merely a convenience. Therefore it is simpler and more accurate for each source to have a generic notice of the license name and references to more detailed information on copyright holders and full license terms. Our `Copyright.txt` file now contains a list of Contributors whose names appeared source-level copyright notices. It also references version control history for more precise information. Therefore we no longer need to spell out the list of Contributors in each source file notice. Replace CMake per-source copyright/license notice headers with a short description of the license and links to `Copyright.txt` and online information available from "https://cmake.org/licensing". The online URL also handles cases of modules being copied out of our source into other projects, so we can drop our notices about replacing links with full license text. Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority of the replacements mechanically. Manually fix up shebang lines and trailing newlines in a few files. Manually update the notices in a few files that the script does not handle.
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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:
# FindTclsh
# ---------
#
# Find tclsh
#
# This module finds if TCL is installed and determines where the include
# files and libraries are. It also determines what the name of the
# library is. This code sets the following variables:
#
# ::
#
# TCLSH_FOUND = TRUE if tclsh has been found
# TCL_TCLSH = the path to the tclsh executable
#
# In cygwin, look for the cygwin version first. Don't look for it later
# to avoid finding the cygwin version on a Win32 build.
if(CYGWIN)
find_program(TCL_TCLSH NAMES cygtclsh83 cygtclsh80)
endif()
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get_filename_component(TK_WISH_PATH "${TK_WISH}" PATH)
get_filename_component(TK_WISH_PATH_PARENT "${TK_WISH_PATH}" PATH)
string(REGEX REPLACE
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"^.*wish([0-9]\\.*[0-9]).*$" "\\1" TK_WISH_VERSION "${TK_WISH}")
get_filename_component(TCL_INCLUDE_PATH_PARENT "${TCL_INCLUDE_PATH}" PATH)
get_filename_component(TK_INCLUDE_PATH_PARENT "${TK_INCLUDE_PATH}" PATH)
get_filename_component(TCL_LIBRARY_PATH "${TCL_LIBRARY}" PATH)
get_filename_component(TCL_LIBRARY_PATH_PARENT "${TCL_LIBRARY_PATH}" PATH)
string(REGEX REPLACE
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"^.*tcl([0-9]\\.*[0-9]).*$" "\\1" TCL_LIBRARY_VERSION "${TCL_LIBRARY}")
get_filename_component(TK_LIBRARY_PATH "${TK_LIBRARY}" PATH)
get_filename_component(TK_LIBRARY_PATH_PARENT "${TK_LIBRARY_PATH}" PATH)
string(REGEX REPLACE
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"^.*tk([0-9]\\.*[0-9]).*$" "\\1" TK_LIBRARY_VERSION "${TK_LIBRARY}")
set(TCLTK_POSSIBLE_BIN_PATHS
"${TCL_INCLUDE_PATH_PARENT}/bin"
"${TK_INCLUDE_PATH_PARENT}/bin"
"${TCL_LIBRARY_PATH_PARENT}/bin"
"${TK_LIBRARY_PATH_PARENT}/bin"
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"${TK_WISH_PATH_PARENT}/bin"
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)
if(WIN32)
get_filename_component(
ActiveTcl_CurrentVersion
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\ActiveState\\ActiveTcl;CurrentVersion]"
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NAME)
set(TCLTK_POSSIBLE_BIN_PATHS ${TCLTK_POSSIBLE_BIN_PATHS}
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"[HKEY_LOCAL_MACHINE\\SOFTWARE\\ActiveState\\ActiveTcl\\${ActiveTcl_CurrentVersion}]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.6;Root]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.5;Root]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.4;Root]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.3;Root]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.2;Root]/bin"
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.0;Root]/bin"
)
endif()
set(TCL_TCLSH_NAMES
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tclsh
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tclsh${TCL_LIBRARY_VERSION} tclsh${TK_LIBRARY_VERSION} tclsh${TK_WISH_VERSION}
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tclsh86 tclsh8.6
tclsh85 tclsh8.5
tclsh84 tclsh8.4
tclsh83 tclsh8.3
tclsh82 tclsh8.2
tclsh80 tclsh8.0
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)
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find_program(TCL_TCLSH
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NAMES ${TCL_TCLSH_NAMES}
HINTS ${TCLTK_POSSIBLE_BIN_PATHS}
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)
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if(TCL_TCLSH)
execute_process(COMMAND "${CMAKE_COMMAND}" -E echo puts "\$tcl_version"
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COMMAND "${TCL_TCLSH}"
OUTPUT_VARIABLE TCLSH_VERSION_STRING
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE)
endif()
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(Tclsh
REQUIRED_VARS TCL_TCLSH
VERSION_VAR TCLSH_VERSION_STRING)
mark_as_advanced(TCL_TCLSH)