Merge topic 'host-distro-info'

b9698f89df cmake_host_system_information: Make it available for all systems
5469c71a82 Refactor: Simplify `GetValue()` function calls
6c92f80f2e cmake_host_system_information: Also set `USED_FALLBACK_SCRIPT`
efe139d1b8 cmake_host_system_information: Can run fallback scripts
1e65e4a6e5 cmake_host_system_information: Can read `/etc/os-release` file
e808cbb1dd Testing: Convert `cmake_host_system_information` tests into `RunCMake`
9e831284e5 Documentation: Use definition list instead of tables
346f3de005 Refactor: Deduplicate code for `VS_nn_DIR` keys processing
...

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !6410

37 files changed, 226 insertions, 24 deletions

diff --git a/Tests/CMakeTests/CMakeLists.txt b/Tests/CMakeTests/CMakeLists.txt
index 52959e6..9e0b891 100644
--- a/Tests/CMakeTests/CMakeLists.txt
+++ b/Tests/CMakeTests/CMakeLists.txt
@@ -31,7 +31,6 @@ AddCMakeTest(CompilerIdVendor "")
 AddCMakeTest(ProcessorCount "-DKWSYS_TEST_EXE=$<TARGET_FILE:cmsysTestsCxx>")
 AddCMakeTest(PushCheckState "")
 AddCMakeTest(While "")
-AddCMakeTest(CMakeHostSystemInformation "")
 
 AddCMakeTest(FileDownload "")
 set_tests_properties(CMake.FileDownload PROPERTIES
diff --git a/Tests/RunCMake/CMakeLists.txt b/Tests/RunCMake/CMakeLists.txt
index ef797f7..eb2c2d9 100644
--- a/Tests/RunCMake/CMakeLists.txt
+++ b/Tests/RunCMake/CMakeLists.txt
@@ -349,6 +349,7 @@ if(NOT CMake_TEST_EXTERNAL_CMAKE)
 endif()
 add_RunCMake_test(execute_process)
 add_RunCMake_test(export)
+add_RunCMake_test(cmake_host_system_information)
 add_RunCMake_test(cmake_language)
 add_RunCMake_test(cmake_minimum_required)
 add_RunCMake_test(cmake_parse_arguments)
diff --git a/Tests/RunCMake/cmake_host_system_information/000-FirstFallbackScript.cmake b/Tests/RunCMake/cmake_host_system_information/000-FirstFallbackScript.cmake
new file mode 100644
index 0000000..ad873eb
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/000-FirstFallbackScript.cmake
@@ -0,0 +1 @@
+message(WARNING "The warning text to match just to make sure the script get executed")
diff --git a/Tests/RunCMake/cmake_host_system_information/999-LastFallbackScript.cmake b/Tests/RunCMake/cmake_host_system_information/999-LastFallbackScript.cmake
new file mode 100644
index 0000000..08d8da8
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/999-LastFallbackScript.cmake
@@ -0,0 +1,21 @@
+if(DEFINED CMAKE_GET_OS_RELEASE_FALLBACK_RESULT)
+  message(FATAL_ERROR "The `CMAKE_GET_OS_RELEASE_FALLBACK_RESULT` expected to be unset at this moment")
+endif()
+
+set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_NAME UnitTest)
+set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_PRETTY_NAME "Just a Unit Test")
+set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_ID unittest)
+set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_ID_LIKE nothing)
+set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_VERSION 0.0.1)
+set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_VERSION_ID 0.0.1)
+
+list(
+    APPEND CMAKE_GET_OS_RELEASE_FALLBACK_RESULT
+    CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_NAME
+    CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_PRETTY_NAME
+    IGNORED_VARIABLE_NAME_WHICH_IS_NOT_STARTED_WITH_EXPECTED_PREFIX
+    CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_ID
+    CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_ID_LIKE
+    CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_VERSION
+    CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_VERSION_ID
+  )
diff --git a/Tests/RunCMake/cmake_host_system_information/BadArg1-result.txt b/Tests/RunCMake/cmake_host_system_information/BadArg1-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/BadArg1-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/cmake_host_system_information/BadArg1-stderr.txt b/Tests/RunCMake/cmake_host_system_information/BadArg1-stderr.txt
new file mode 100644
index 0000000..ed995e6
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/BadArg1-stderr.txt
@@ -0,0 +1,4 @@
+CMake Error at BadArg1\.cmake:1 \(cmake_host_system_information\):
+  cmake_host_system_information missing RESULT specification.
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:7 \(include\)
diff --git a/Tests/CMakeTests/CMakeHostSystemInformation-BadArg1.cmake b/Tests/RunCMake/cmake_host_system_information/BadArg1.cmake
index 1655eb4..1655eb4 100644
--- a/Tests/CMakeTests/CMakeHostSystemInformation-BadArg1.cmake
+++ b/Tests/RunCMake/cmake_host_system_information/BadArg1.cmake
diff --git a/Tests/RunCMake/cmake_host_system_information/BadArg2-result.txt b/Tests/RunCMake/cmake_host_system_information/BadArg2-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/BadArg2-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/cmake_host_system_information/BadArg2-stderr.txt b/Tests/RunCMake/cmake_host_system_information/BadArg2-stderr.txt
new file mode 100644
index 0000000..b78c927
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/BadArg2-stderr.txt
@@ -0,0 +1,4 @@
+CMake Error at BadArg2\.cmake:1 \(cmake_host_system_information\):
+  cmake_host_system_information missing QUERY specification
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:7 \(include\)
diff --git a/Tests/CMakeTests/CMakeHostSystemInformation-BadArg2.cmake b/Tests/RunCMake/cmake_host_system_information/BadArg2.cmake
index 1f056d5..1f056d5 100644
--- a/Tests/CMakeTests/CMakeHostSystemInformation-BadArg2.cmake
+++ b/Tests/RunCMake/cmake_host_system_information/BadArg2.cmake
diff --git a/Tests/RunCMake/cmake_host_system_information/BadArg3-result.txt b/Tests/RunCMake/cmake_host_system_information/BadArg3-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/BadArg3-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/cmake_host_system_information/BadArg3-stderr.txt b/Tests/RunCMake/cmake_host_system_information/BadArg3-stderr.txt
new file mode 100644
index 0000000..c3f1314
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/BadArg3-stderr.txt
@@ -0,0 +1,4 @@
+CMake Error at BadArg3\.cmake:1 \(cmake_host_system_information\):
+  cmake_host_system_information does not recognize <key> FOOBAR
+Call Stack \(most recent call first\):
+  CMakeLists\.txt:7 \(include\)
diff --git a/Tests/CMakeTests/CMakeHostSystemInformation-BadArg3.cmake b/Tests/RunCMake/cmake_host_system_information/BadArg3.cmake
index 9c5a558..9c5a558 100644
--- a/Tests/CMakeTests/CMakeHostSystemInformation-BadArg3.cmake
+++ b/Tests/RunCMake/cmake_host_system_information/BadArg3.cmake
diff --git a/Tests/RunCMake/cmake_host_system_information/CMakeLists.txt b/Tests/RunCMake/cmake_host_system_information/CMakeLists.txt
new file mode 100644
index 0000000..0198f9b
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/CMakeLists.txt
@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.21)
+
+project(${RunCMake_TEST} NONE)
+
+set(CMAKE_SYSROOT ${PROJECT_SOURCE_DIR}/${RunCMake_TEST})
+
+include(${RunCMake_TEST}.cmake)
diff --git a/Tests/RunCMake/cmake_host_system_information/CentOS6-stdout.txt b/Tests/RunCMake/cmake_host_system_information/CentOS6-stdout.txt
new file mode 100644
index 0000000..50dbb08
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/CentOS6-stdout.txt
@@ -0,0 +1,7 @@
+-- CENTOS6_ID=`centos`
+-- CENTOS6_ID_LIKE=`rhel`
+-- CENTOS6_NAME=`CentOS`
+-- CENTOS6_PRETTY_NAME=`CentOS release 6\.10 \(Final\)`
+-- CENTOS6_USED_FALLBACK_SCRIPT=`.*/Modules/Internal/OSRelease/010-TryOldCentOS.cmake`
+-- CENTOS6_VERSION=`6\.10`
+-- CENTOS6_VERSION_ID=`6\.10`
diff --git a/Tests/RunCMake/cmake_host_system_information/CentOS6.cmake b/Tests/RunCMake/cmake_host_system_information/CentOS6.cmake
new file mode 100644
index 0000000..3bc632b
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/CentOS6.cmake
@@ -0,0 +1,5 @@
+cmake_host_system_information(RESULT CENTOS6 QUERY DISTRIB_INFO)
+
+foreach(VAR IN LISTS CENTOS6)
+  message(STATUS "${VAR}=`${${VAR}}`")
+endforeach()
diff --git a/Tests/RunCMake/cmake_host_system_information/CentOS6/etc/centos-release b/Tests/RunCMake/cmake_host_system_information/CentOS6/etc/centos-release
new file mode 100644
index 0000000..294ccc9
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/CentOS6/etc/centos-release
@@ -0,0 +1 @@
+CentOS release 6.10 (Final)
diff --git a/Tests/RunCMake/cmake_host_system_information/Debian6-stdout.txt b/Tests/RunCMake/cmake_host_system_information/Debian6-stdout.txt
new file mode 100644
index 0000000..4193d6f
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/Debian6-stdout.txt
@@ -0,0 +1,5 @@
+-- DEBIAN6_ID=`debian`
+-- DEBIAN6_NAME=`Debian`
+-- DEBIAN6_USED_FALLBACK_SCRIPT=`.*/Modules/Internal/OSRelease/020-TryDebianVersion.cmake`
+-- DEBIAN6_VERSION=`6\.0\.10`
+-- DEBIAN6_VERSION_ID=`6\.0\.10`
diff --git a/Tests/RunCMake/cmake_host_system_information/Debian6.cmake b/Tests/RunCMake/cmake_host_system_information/Debian6.cmake
new file mode 100644
index 0000000..cbf83a9
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/Debian6.cmake
@@ -0,0 +1,5 @@
+cmake_host_system_information(RESULT DEBIAN6 QUERY DISTRIB_INFO)
+
+foreach(VAR IN LISTS DEBIAN6)
+  message(STATUS "${VAR}=`${${VAR}}`")
+endforeach()
diff --git a/Tests/RunCMake/cmake_host_system_information/Debian6/etc/debian_version b/Tests/RunCMake/cmake_host_system_information/Debian6/etc/debian_version
new file mode 100644
index 0000000..c7d48f0
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/Debian6/etc/debian_version
@@ -0,0 +1 @@
+6.0.10
diff --git a/Tests/RunCMake/cmake_host_system_information/Exherbo-stdout.txt b/Tests/RunCMake/cmake_host_system_information/Exherbo-stdout.txt
new file mode 100644
index 0000000..11ae71f
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/Exherbo-stdout.txt
@@ -0,0 +1,9 @@
+-- TEST1_ANSI_COLOR=`0;32`
+-- TEST1_BUG_REPORT_URL=`https://bugs.exherbo.org/`
+-- TEST1_HOME_URL=`https://www.exherbo.org/`
+-- TEST1_ID=`exherbo`
+-- TEST1_NAME=`Exherbo`
+-- TEST1_PRETTY_NAME=`Exherbo Linux`
+-- TEST1_SUPPORT_URL=`irc://irc.freenode.net/#exherbo`
+-- TEST2_ID=`exherbo`
+-- TEST2_VERSION=``
diff --git a/Tests/RunCMake/cmake_host_system_information/Exherbo.cmake b/Tests/RunCMake/cmake_host_system_information/Exherbo.cmake
new file mode 100644
index 0000000..7fc26d8
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/Exherbo.cmake
@@ -0,0 +1,11 @@
+cmake_host_system_information(RESULT TEST1 QUERY DISTRIB_INFO)
+
+foreach(VAR IN LISTS TEST1)
+  message(STATUS "${VAR}=`${${VAR}}`")
+endforeach()
+
+# Query individual variables
+cmake_host_system_information(RESULT TEST2 QUERY DISTRIB_ID DISTRIB_VERSION)
+list(POP_FRONT TEST2 TEST2_ID TEST2_VERSION)
+message(STATUS "TEST2_ID=`${TEST2_ID}`")
+message(STATUS "TEST2_VERSION=`${TEST2_VERSION}`")
diff --git a/Tests/RunCMake/cmake_host_system_information/Exherbo/etc/os-release b/Tests/RunCMake/cmake_host_system_information/Exherbo/etc/os-release
new file mode 100644
index 0000000..944c9b4
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/Exherbo/etc/os-release
@@ -0,0 +1,7 @@
+NAME="Exherbo"
+PRETTY_NAME="Exherbo Linux"
+ID="exherbo"
+ANSI_COLOR="0;32"
+HOME_URL="https://www.exherbo.org/"
+SUPPORT_URL="irc://irc.freenode.net/#exherbo"
+BUG_REPORT_URL="https://bugs.exherbo.org/"
diff --git a/Tests/RunCMake/cmake_host_system_information/QueryKeys-stdout.txt b/Tests/RunCMake/cmake_host_system_information/QueryKeys-stdout.txt
new file mode 100644
index 0000000..f583deb
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/QueryKeys-stdout.txt
@@ -0,0 +1,27 @@
+-- NUMBER_OF_LOGICAL_CORES=`[0-9]+`
+-- NUMBER_OF_PHYSICAL_CORES=`[0-9]+`
+-- HOSTNAME=`.*`
+-- FQDN=`.*`
+-- TOTAL_VIRTUAL_MEMORY=`[0-9]+`
+-- AVAILABLE_VIRTUAL_MEMORY=`[0-9]+`
+-- TOTAL_PHYSICAL_MEMORY=`[0-9]+`
+-- AVAILABLE_PHYSICAL_MEMORY=`[0-9]+`
+-- IS_64BIT=`[01]`
+-- HAS_FPU=`[01]`
+-- HAS_MMX=`[01]`
+-- HAS_MMX_PLUS=`[01]`
+-- HAS_SSE=`[01]`
+-- HAS_SSE2=`[01]`
+-- HAS_SSE_FP=`[01]`
+-- HAS_SSE_MMX=`[01]`
+-- HAS_AMD_3DNOW=`[01]`
+-- HAS_AMD_3DNOW_PLUS=`[01]`
+-- HAS_IA64=`[01]`
+-- HAS_SERIAL_NUMBER=`[01]`
+-- PROCESSOR_SERIAL_NUMBER=`.*`
+-- PROCESSOR_NAME=`.*`
+-- PROCESSOR_DESCRIPTION=`.*`
+-- OS_NAME=`.*`
+-- OS_RELEASE=`.*`
+-- OS_VERSION=`.*`
+-- OS_PLATFORM=`.*`
diff --git a/Tests/CMakeTests/CMakeHostSystemInformationTest.cmake.in b/Tests/RunCMake/cmake_host_system_information/QueryKeys.cmake
index a3c2b05..f22a0ae 100644
--- a/Tests/CMakeTests/CMakeHostSystemInformationTest.cmake.in
+++ b/Tests/RunCMake/cmake_host_system_information/QueryKeys.cmake
@@ -1,19 +1,8 @@
-set(BadArg1-RESULT 1)
-set(BadArg1-STDERR "missing RESULT specification")
-set(BadArg2-RESULT 1)
-set(BadArg2-STDERR "missing QUERY specification")
-set(BadArg3-RESULT 1)
-set(BadArg3-STDERR "does not recognize <key> FOOBAR")
-set(QueryList-RESULT 0)
-set(QueryList-STDERR "\\[[0-9]+;[0-9]+\\]")
-
 function(try_and_print key)
-	cmake_host_system_information(RESULT RESULT QUERY ${key})
-	message(STATUS "[${key}] [${RESULT}]")
+  cmake_host_system_information(RESULT RESULT QUERY ${key})
+  message(STATUS "${key}=`${RESULT}`")
 endfunction()
 
-message("CTEST_FULL_OUTPUT (Avoid ctest truncation of output)")
-
 try_and_print(NUMBER_OF_LOGICAL_CORES)
 try_and_print(NUMBER_OF_PHYSICAL_CORES)
 try_and_print(HOSTNAME)
@@ -41,12 +30,3 @@ try_and_print(OS_NAME)
 try_and_print(OS_RELEASE)
 try_and_print(OS_VERSION)
 try_and_print(OS_PLATFORM)
-
-include("@CMAKE_CURRENT_SOURCE_DIR@/CheckCMakeTest.cmake")
-
-check_cmake_test(CMakeHostSystemInformation
-	BadArg1
-	BadArg2
-	BadArg3
-	QueryList
-)
diff --git a/Tests/RunCMake/cmake_host_system_information/QueryList-stdout.txt b/Tests/RunCMake/cmake_host_system_information/QueryList-stdout.txt
new file mode 100644
index 0000000..eebe0d4
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/QueryList-stdout.txt
@@ -0,0 +1 @@
+-- \[[0-9]+;[0-9]+\]
diff --git a/Tests/CMakeTests/CMakeHostSystemInformation-QueryList.cmake b/Tests/RunCMake/cmake_host_system_information/QueryList.cmake
index 1c3156d..f24aa2b 100644
--- a/Tests/CMakeTests/CMakeHostSystemInformation-QueryList.cmake
+++ b/Tests/RunCMake/cmake_host_system_information/QueryList.cmake
@@ -2,4 +2,4 @@ cmake_host_system_information(RESULT RESULT
   QUERY NUMBER_OF_LOGICAL_CORES NUMBER_OF_PHYSICAL_CORES
 )
 
-message("[${RESULT}]")
+message(STATUS "[${RESULT}]")
diff --git a/Tests/RunCMake/cmake_host_system_information/RunCMakeTest.cmake b/Tests/RunCMake/cmake_host_system_information/RunCMakeTest.cmake
new file mode 100644
index 0000000..189013f
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/RunCMakeTest.cmake
@@ -0,0 +1,17 @@
+include(RunCMake)
+
+run_cmake(BadArg1)
+run_cmake(BadArg2)
+run_cmake(BadArg3)
+
+run_cmake(QueryList)
+run_cmake(QueryKeys)
+
+run_cmake(UnitTest)
+run_cmake(Exherbo)
+run_cmake(Ubuntu)
+
+run_cmake(CentOS6)
+run_cmake(Debian6)
+
+run_cmake(UserFallbackScript)
diff --git a/Tests/RunCMake/cmake_host_system_information/Ubuntu-stdout.txt b/Tests/RunCMake/cmake_host_system_information/Ubuntu-stdout.txt
new file mode 100644
index 0000000..d1a18da
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/Ubuntu-stdout.txt
@@ -0,0 +1,14 @@
+-- TEST1_BUG_REPORT_URL=`https://bugs\.launchpad\.net/ubuntu/`
+-- TEST1_HOME_URL=`https://www\.ubuntu\.com/`
+-- TEST1_ID=`ubuntu`
+-- TEST1_ID_LIKE=`debian`
+-- TEST1_NAME=`Ubuntu`
+-- TEST1_PRETTY_NAME=`Ubuntu 20\.04\.2 LTS`
+-- TEST1_PRIVACY_POLICY_URL=`https://www\.ubuntu\.com/legal/terms-and-policies/privacy-policy`
+-- TEST1_SUPPORT_URL=`https://help\.ubuntu\.com/`
+-- TEST1_UBUNTU_CODENAME=`focal`
+-- TEST1_VERSION=`20\.04\.2 LTS \(Focal Fossa\)`
+-- TEST1_VERSION_CODENAME=`focal`
+-- TEST1_VERSION_ID=`20\.04`
+-- TEST2_ID=`ubuntu`
+-- TEST2_VERSION=`20\.04\.2 LTS \(Focal Fossa\)`
diff --git a/Tests/RunCMake/cmake_host_system_information/Ubuntu.cmake b/Tests/RunCMake/cmake_host_system_information/Ubuntu.cmake
new file mode 100644
index 0000000..7fc26d8
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/Ubuntu.cmake
@@ -0,0 +1,11 @@
+cmake_host_system_information(RESULT TEST1 QUERY DISTRIB_INFO)
+
+foreach(VAR IN LISTS TEST1)
+  message(STATUS "${VAR}=`${${VAR}}`")
+endforeach()
+
+# Query individual variables
+cmake_host_system_information(RESULT TEST2 QUERY DISTRIB_ID DISTRIB_VERSION)
+list(POP_FRONT TEST2 TEST2_ID TEST2_VERSION)
+message(STATUS "TEST2_ID=`${TEST2_ID}`")
+message(STATUS "TEST2_VERSION=`${TEST2_VERSION}`")
diff --git a/Tests/RunCMake/cmake_host_system_information/Ubuntu/etc/os-release b/Tests/RunCMake/cmake_host_system_information/Ubuntu/etc/os-release
new file mode 100644
index 0000000..f228f22
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/Ubuntu/etc/os-release
@@ -0,0 +1,12 @@
+NAME="Ubuntu"
+VERSION="20.04.2 LTS (Focal Fossa)"
+ID=ubuntu
+ID_LIKE=debian
+PRETTY_NAME="Ubuntu 20.04.2 LTS"
+VERSION_ID="20.04"
+HOME_URL="https://www.ubuntu.com/"
+SUPPORT_URL="https://help.ubuntu.com/"
+BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
+PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
+VERSION_CODENAME=focal
+UBUNTU_CODENAME=focal
diff --git a/Tests/RunCMake/cmake_host_system_information/UnitTest-stdout.txt b/Tests/RunCMake/cmake_host_system_information/UnitTest-stdout.txt
new file mode 100644
index 0000000..db6f487
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/UnitTest-stdout.txt
@@ -0,0 +1,7 @@
+-- UNIT_TEST_A_LIST_LIKE_VARIABLE=`satu;dua;tiga`
+-- UNIT_TEST_DBL_QUOTED_VALUE=`"The" value in double "quotes"`
+-- UNIT_TEST_DBL_QUOTED_VALUE_STIPPED_COMMENT=`Blah blah blah`
+-- UNIT_TEST_NON_SPACE_VALUE=`Blah-blah-blah`
+-- UNIT_TEST_QUOTED_VALUE=`'The' value in single 'quotes'`
+-- UNIT_TEST_QUOTED_VALUE_STIPPED_COMMENT=`The value in single quotes`
+-- UNIT_TEST_THE_URL_WITH_ANCHOR_TEST=`https://blah.blah/resource#anchor`
diff --git a/Tests/RunCMake/cmake_host_system_information/UnitTest.cmake b/Tests/RunCMake/cmake_host_system_information/UnitTest.cmake
new file mode 100644
index 0000000..d9a0aca
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/UnitTest.cmake
@@ -0,0 +1,5 @@
+cmake_host_system_information(RESULT UNIT_TEST QUERY DISTRIB_INFO)
+
+foreach(VAR IN LISTS UNIT_TEST)
+  message(STATUS "${VAR}=`${${VAR}}`")
+endforeach()
diff --git a/Tests/RunCMake/cmake_host_system_information/UnitTest/etc/os-release b/Tests/RunCMake/cmake_host_system_information/UnitTest/etc/os-release
new file mode 100644
index 0000000..66c33b5
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/UnitTest/etc/os-release
@@ -0,0 +1,9 @@
+# Comment string gonna be ignored
+NON_SPACE_VALUE=Blah-blah-blah
+QUOTED_VALUE='\'The\' value in single \'quotes\''
+QUOTED_VALUE_STIPPED_COMMENT='The value in single quotes'# The comment right after `'`
+DBL_QUOTED_VALUE="\"The\" value in double \"quotes\""
+DBL_QUOTED_VALUE_STIPPED_COMMENT="Blah blah blah"# The comment right after `'`
+THE_URL_WITH_ANCHOR_TEST="https://blah.blah/resource#anchor" # And a comment after
+A_LIST_LIKE_VARIABLE='satu;dua;tiga'
+INCORRECT_ESCAPE_IGNORED=\'This line gonna be ignored'
diff --git a/Tests/RunCMake/cmake_host_system_information/UserFallbackScript-stderr.txt b/Tests/RunCMake/cmake_host_system_information/UserFallbackScript-stderr.txt
new file mode 100644
index 0000000..78acea2
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/UserFallbackScript-stderr.txt
@@ -0,0 +1,5 @@
+CMake Warning at 000-FirstFallbackScript\.cmake:[0-9]+ \(message\):
+  The warning text to match just to make sure the script get executed
+Call Stack \(most recent call first\):
+  UserFallbackScript\.cmake:[0-9]+ \(cmake_host_system_information\)
+  CMakeLists\.txt:[0-9]+ \(include\)
diff --git a/Tests/RunCMake/cmake_host_system_information/UserFallbackScript-stdout.txt b/Tests/RunCMake/cmake_host_system_information/UserFallbackScript-stdout.txt
new file mode 100644
index 0000000..acaf47e
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/UserFallbackScript-stdout.txt
@@ -0,0 +1,7 @@
+-- UFS_ID=`unittest`
+-- UFS_ID_LIKE=`nothing`
+-- UFS_NAME=`UnitTest`
+-- UFS_PRETTY_NAME=`Just a Unit Test`
+-- UFS_USED_FALLBACK_SCRIPT=`.*/999-LastFallbackScript\.cmake`
+-- UFS_VERSION=`0\.0\.1`
+-- UFS_VERSION_ID=`0\.0\.1`
diff --git a/Tests/RunCMake/cmake_host_system_information/UserFallbackScript.cmake b/Tests/RunCMake/cmake_host_system_information/UserFallbackScript.cmake
new file mode 100644
index 0000000..660aa1c
--- /dev/null
+++ b/Tests/RunCMake/cmake_host_system_information/UserFallbackScript.cmake
@@ -0,0 +1,12 @@
+list(
+    APPEND CMAKE_GET_OS_RELEASE_FALLBACK_SCRIPTS
+    ${CMAKE_CURRENT_SOURCE_DIR}/000-FirstFallbackScript.cmake
+    ${CMAKE_CURRENT_SOURCE_DIR}/Ignored-Script.cmake
+    ${CMAKE_CURRENT_SOURCE_DIR}/999-LastFallbackScript.cmake
+  )
+
+cmake_host_system_information(RESULT UFS QUERY DISTRIB_INFO)
+
+foreach(VAR IN LISTS UFS)
+  message(STATUS "${VAR}=`${${VAR}}`")
+endforeach()