FindMsys: Add a module to find MSYS and some bundled packages

Help/manual/cmake-modules.7.rst

@@ -185,6 +185,7 @@ They are normally called through the :command:`find_package` command.
    /module/FindMPEG
    /module/FindMPEG2
    /module/FindMPI
+   /module/FindMsys
    /module/FindODBC
    /module/FindOpenACC
    /module/FindOpenAL

Help/module/FindMsys.rst

@@ -0,0 +1 @@
+.. cmake-module:: ../../Modules/FindMsys.cmake

Help/release/dev/FindMsys.rst

@@ -0,0 +1,6 @@
+FindMsys
+--------
+
+* The :module:`FindMsys` module was added to find MSYS installations.
+  Like :module:`FindCygwin`, it is used automatically by some other
+  find modules to locate UNIX-style tools on Windows.

Modules/FindGnuplot.cmake

@@ -23,6 +23,7 @@ GNUPLOT_VERSION_STRING will not work for old versions like 3.7.1.
 #]=======================================================================]
 
 include(${CMAKE_CURRENT_LIST_DIR}/FindCygwin.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/FindMsys.cmake)
 
 find_program(GNUPLOT_EXECUTABLE
   NAMES
@@ -31,6 +32,7 @@ find_program(GNUPLOT_EXECUTABLE
   wgnupl32
   PATHS
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
 )
 
 if (GNUPLOT_EXECUTABLE)

Modules/FindMsys.cmake

@@ -0,0 +1,31 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#[=======================================================================[.rst:
+FindMsys
+--------
+
+.. versionadded:: 3.21
+
+Find MSYS, a POSIX-compatible environment that runs natively
+on Microsoft Windows
+#]=======================================================================]
+
+if (WIN32)
+  if(MSYS_INSTALL_PATH)
+    set(MSYS_CMD "${MSYS_INSTALL_PATH}/msys2_shell.cmd")
+  endif()
+
+  find_program(MSYS_CMD
+    NAMES msys2_shell.cmd
+    PATHS
+      "C:/msys64"
+      "C:/msys32"
+      "C:/MSYS"
+      "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MSYS\\setup;rootdir]"
+      "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Cygnus Solutions\\MSYS\\mounts v2\\/;native]"
+  )
+  get_filename_component(MSYS_INSTALL_PATH "${MSYS_CMD}" DIRECTORY)
+  mark_as_advanced(MSYS_CMD)
+
+endif ()

Modules/FindPerl.cmake

@@ -17,9 +17,11 @@ this module looks for Perl
 #]=======================================================================]
 
 include(${CMAKE_CURRENT_LIST_DIR}/FindCygwin.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/FindMsys.cmake)
 
 set(PERL_POSSIBLE_BIN_PATHS
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
   )
 
 if(WIN32)

Modules/FindSelfPackers.cmake

@@ -17,15 +17,18 @@ executables or shared libs.  Examples:
 #]=======================================================================]
 
 include(${CMAKE_CURRENT_LIST_DIR}/FindCygwin.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/FindMsys.cmake)
 
 find_program(SELF_PACKER_FOR_EXECUTABLE
   upx
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
 )
 
 find_program(SELF_PACKER_FOR_SHARED_LIB
   upx
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
 )
 
 mark_as_advanced(

Modules/FindUnixCommands.cmake

@@ -13,10 +13,12 @@ This module looks for the Unix commands ``bash``, ``cp``, ``gzip``,
 #]=======================================================================]
 
 include(${CMAKE_CURRENT_LIST_DIR}/FindCygwin.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/FindMsys.cmake)
 
 find_program(BASH
   bash
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
 )
 mark_as_advanced(
   BASH
@@ -25,6 +27,7 @@ mark_as_advanced(
 find_program(CP
   cp
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
 )
 mark_as_advanced(
   CP
@@ -33,6 +36,7 @@ mark_as_advanced(
 find_program(GZIP
   gzip
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
 )
 mark_as_advanced(
   GZIP
@@ -41,6 +45,7 @@ mark_as_advanced(
 find_program(MV
   mv
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
 )
 mark_as_advanced(
   MV
@@ -49,6 +54,7 @@ mark_as_advanced(
 find_program(RM
   rm
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
 )
 mark_as_advanced(
   RM
@@ -60,6 +66,7 @@ find_program(TAR
   gtar
   PATH
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
 )
 mark_as_advanced(
   TAR

Modules/FindWget.cmake

@@ -16,10 +16,12 @@ This module looks for wget.  This module defines the following values:
 #]=======================================================================]
 
 include(${CMAKE_CURRENT_LIST_DIR}/FindCygwin.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/FindMsys.cmake)
 
 find_program(WGET_EXECUTABLE
   wget
   ${CYGWIN_INSTALL_PATH}/bin
+  ${MSYS_INSTALL_PATH}/usr/bin
 )
 
 include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)