find_*(): Add CMAKE_IGNORE_PREFIX_PATH variable

Fixes: #20878

6 files changed, 60 insertions, 0 deletions

diff --git a/Tests/RunCMake/find_package/IgnorePrefixPath.cmake b/Tests/RunCMake/find_package/IgnorePrefixPath.cmake
new file mode 100644
index 0000000..65709a2
--- /dev/null
+++ b/Tests/RunCMake/find_package/IgnorePrefixPath.cmake
@@ -0,0 +1,26 @@
+set(CMAKE_PREFIX_PATH
+  ${CMAKE_SOURCE_DIR}/PackageRoot/foo/cmake_root
+  ${CMAKE_SOURCE_DIR}/PackageRoot/foo/env_root
+  )
+set(CMAKE_IGNORE_PREFIX_PATH
+  ${CMAKE_SOURCE_DIR}/PackageRoot//foo/cmake_root// # Test double slashes
+  )
+set(CMAKE_SYSTEM_IGNORE_PREFIX_PATH
+  ${CMAKE_SOURCE_DIR}/PackageRoot/foo/env_root
+  )
+find_package(Bar QUIET CONFIG)
+if(Bar_FOUND)
+  message(SEND_ERROR "Bar should not be found, was found in ${Bar_DIR}")
+endif()
+
+set(CMAKE_PREFIX_PATH)
+set(CMAKE_FIND_ROOT_PATH
+  ${CMAKE_SOURCE_DIR}/PackageRoot/foo/cmake_root
+  ${CMAKE_SOURCE_DIR}/PackageRoot/foo/env_root
+  )
+set(CMAKE_IGNORE_PREFIX_PATH /)
+set(CMAKE_SYSTEM_IGNORE_PREFIX_PATH)
+find_package(Bar2 NAMES Bar QUIET CONFIG)
+if(Bar2_FOUND)
+  message(SEND_ERROR "Bar2 should not be found, was found in ${Bar2_DIR}")
+endif()
diff --git a/Tests/RunCMake/find_package/RunCMakeTest.cmake b/Tests/RunCMake/find_package/RunCMakeTest.cmake
index 12701dc..037502f 100644
--- a/Tests/RunCMake/find_package/RunCMakeTest.cmake
+++ b/Tests/RunCMake/find_package/RunCMakeTest.cmake
@@ -45,6 +45,7 @@ run_cmake(VersionRangeConfig02)
 run_cmake(VersionRangeConfigStd)
 run_cmake(VersionRangeConfigStd2)
 run_cmake(IgnorePath)
+run_cmake(IgnorePrefixPath)
 if(UNIX
     AND NOT MSYS # FIXME: This works on CYGWIN but not on MSYS
     )
diff --git a/Tests/RunCMake/find_program/IgnorePrefixPath.cmake b/Tests/RunCMake/find_program/IgnorePrefixPath.cmake
new file mode 100644
index 0000000..5f0dba9
--- /dev/null
+++ b/Tests/RunCMake/find_program/IgnorePrefixPath.cmake
@@ -0,0 +1,30 @@
+function(assert_eq var value)
+  if(NOT "${${var}}" STREQUAL "${value}")
+    message(SEND_ERROR "Expected value of ${var}:\n  ${value}\nActual value:\n  ${${var}}")
+  endif()
+endfunction()
+
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH FALSE)
+
+set(CMAKE_PREFIX_PATH ${CMAKE_SOURCE_DIR}/Prefix)
+set(_old_CMAKE_SYSTEM_PREFIX_PATH ${CMAKE_SYSTEM_PREFIX_PATH})
+set(CMAKE_SYSTEM_PREFIX_PATH ${CMAKE_SOURCE_DIR}/SystemPrefix)
+set(prog_ROOT
+  ${CMAKE_SOURCE_DIR}/Prefix
+  ${CMAKE_SOURCE_DIR}/SystemPrefix
+  )
+
+set(CMAKE_IGNORE_PREFIX_PATH ${CMAKE_SOURCE_DIR}/Prefix)
+set(CMAKE_SYSTEM_IGNORE_PREFIX_PATH ${CMAKE_SOURCE_DIR}/SystemPrefix)
+find_program(prog prog)
+assert_eq(prog "prog-NOTFOUND")
+
+set(CMAKE_PREFIX_PATH)
+set(CMAKE_SYSTEM_PREFIX_PATH ${_old_CMAKE_SYSTEM_PREFIX_PATH})
+set(CMAKE_IGNORE_PREFIX_PATH /)
+set(CMAKE_FIND_ROOT_PATH
+  ${CMAKE_SOURCE_DIR}/Prefix
+  ${CMAKE_SOURCE_DIR}/SystemPrefix
+  )
+find_program(prog2 prog)
+assert_eq(prog2 "prog2-NOTFOUND")
diff --git a/Tests/RunCMake/find_program/Prefix/bin/prog b/Tests/RunCMake/find_program/Prefix/bin/prog
new file mode 100755
index 0000000..1a24852
--- /dev/null
+++ b/Tests/RunCMake/find_program/Prefix/bin/prog
@@ -0,0 +1 @@
+#!/bin/sh
diff --git a/Tests/RunCMake/find_program/RunCMakeTest.cmake b/Tests/RunCMake/find_program/RunCMakeTest.cmake
index 2a1dae4..c2c07af 100644
--- a/Tests/RunCMake/find_program/RunCMakeTest.cmake
+++ b/Tests/RunCMake/find_program/RunCMakeTest.cmake
@@ -6,6 +6,7 @@ run_cmake(NamesPerDir)
 run_cmake(RelAndAbsPath)
 run_cmake(Required)
 run_cmake(NO_CACHE)
+run_cmake(IgnorePrefixPath)
 
 if(CMAKE_SYSTEM_NAME MATCHES "^(Windows|CYGWIN|MSYS)$")
   run_cmake(WindowsCom)
diff --git a/Tests/RunCMake/find_program/SystemPrefix/bin/prog b/Tests/RunCMake/find_program/SystemPrefix/bin/prog
new file mode 100755
index 0000000..1a24852
--- /dev/null
+++ b/Tests/RunCMake/find_program/SystemPrefix/bin/prog
@@ -0,0 +1 @@
+#!/bin/sh