Add support for building with Meson (#2530)

The Meson[1] build system makes it easier incorporate third-party
libaries into a project if they also build using Meson.

Let's add a minimal Meson build that's compatible with the CMake build,
along with a GitHub workflow to check that it builds and that at least
the simplest SelfTest runs.

The handling of catch_user_config.hpp is inspired by BUILD.bazel and
doesn't attempt to support any configuratons options. Such features
could be added later.

Meson strongly discourages using wildcards to specify sources, so the
source and header lists are copied from CMakeLists.txt.

Add a new test workflow to test the Meson builds. I was unable to get
these tests to pass with Ubuntu 20.04, so they use Ubuntu 22.04.

I'm neither a CMake nor a Meson expert, but the results seem to work for
me.

[1] https://mesonbuild.com/

Co-authored-by: Mike Crowe <mcrowe@brightsign.biz>

6 files changed, 501 insertions, 0 deletions

diff --git a/.github/workflows/linux-meson-builds.yml b/.github/workflows/linux-meson-builds.yml
new file mode 100644
index 00000000..9d9ef773
--- /dev/null
+++ b/.github/workflows/linux-meson-builds.yml
@@ -0,0 +1,43 @@
+name: Linux builds (basic) using meson build system
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: meson ${{matrix.cxx}}, C++${{matrix.std}}, ${{matrix.build_type}}
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        cxx:
+          - g++-11
+          - clang++-11
+        build_type: [debug, release]
+        std: [14, 17]
+        include:
+          - cxx: clang++-11
+            other_pkgs: clang-11
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Prepare environment
+      run: sudo apt-get install -y meson ninja-build ${{matrix.other_pkgs}}
+
+    - name: Configure build
+      env:
+        CXX: ${{matrix.cxx}}
+        CXXFLAGS: -std=c++${{matrix.std}} ${{matrix.cxxflags}}
+      # Note: $GITHUB_WORKSPACE is distinct from ${{runner.workspace}}.
+      #       This is important
+      run: |
+        meson -Dbuildtype=${{matrix.build_type}} ${{runner.workspace}}/meson-build
+
+    - name: Build tests + lib
+      working-directory: ${{runner.workspace}}/meson-build
+      run: ninja
+
+    - name: Run tests
+      working-directory: ${{runner.workspace}}/meson-build
+      # Hardcode 2 cores we know are there
+      run: |
+        meson test --verbose
diff --git a/.gitignore b/.gitignore
index cafbd6b2..27f6bc0b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 *.build
+!meson.build
 *.pbxuser
 *.mode1v3
 *.ncb
diff --git a/meson.build b/meson.build
new file mode 100644
index 00000000..644f0a24
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,17 @@
+#              Copyright Catch2 Authors
+# Distributed under the Boost Software License, Version 1.0.
+#   (See accompanying file LICENSE_1_0.txt or copy at
+#        https://www.boost.org/LICENSE_1_0.txt)
+
+# SPDX-License-Identifier: BSL-1.0
+
+project(
+  'catch2',
+  'cpp',
+  version : '3.1.0', # CML version placeholder, don't delete
+  license: 'BSL-1.0',
+  meson_version: '>=0.49.0'
+)
+
+subdir('src/catch2')
+subdir('tests')
diff --git a/src/catch2/meson.build b/src/catch2/meson.build
new file mode 100644
index 00000000..e3961585
--- /dev/null
+++ b/src/catch2/meson.build
@@ -0,0 +1,357 @@
+#              Copyright Catch2 Authors
+# Distributed under the Boost Software License, Version 1.0.
+#   (See accompanying file LICENSE_1_0.txt or copy at
+#        https://www.boost.org/LICENSE_1_0.txt)
+
+# SPDX-License-Identifier: BSL-1.0
+pkg = import('pkgconfig')
+
+conf_data = configuration_data()
+conf_data.set('CATCH_CONFIG_DEFAULT_REPORTER', 'console')
+conf_data.set('CATCH_CONFIG_CONSOLE_WIDTH', '80')
+
+configure_file(
+  input: 'catch_user_config.hpp.in',
+  output: 'catch_user_config.hpp',
+  format: 'cmake@',
+  install_dir: get_option('includedir') / 'catch2',
+  configuration: conf_data
+)
+
+benchmark_headers = [
+  'benchmark/catch_benchmark.hpp',
+  'benchmark/catch_benchmark_all.hpp',
+  'benchmark/catch_chronometer.hpp',
+  'benchmark/catch_clock.hpp',
+  'benchmark/catch_constructor.hpp',
+  'benchmark/catch_environment.hpp',
+  'benchmark/catch_estimate.hpp',
+  'benchmark/catch_execution_plan.hpp',
+  'benchmark/catch_optimizer.hpp',
+  'benchmark/catch_outlier_classification.hpp',
+  'benchmark/catch_sample_analysis.hpp',
+  'benchmark/detail/catch_analyse.hpp',
+  'benchmark/detail/catch_benchmark_function.hpp',
+  'benchmark/detail/catch_complete_invoke.hpp',
+  'benchmark/detail/catch_estimate_clock.hpp',
+  'benchmark/detail/catch_measure.hpp',
+  'benchmark/detail/catch_repeat.hpp',
+  'benchmark/detail/catch_run_for_at_least.hpp',
+  'benchmark/detail/catch_stats.hpp',
+  'benchmark/detail/catch_timing.hpp'
+]
+
+benchmark_sources = [
+  'benchmark/catch_chronometer.cpp',
+  'benchmark/detail/catch_benchmark_function.cpp',
+  'benchmark/detail/catch_run_for_at_least.cpp',
+  'benchmark/detail/catch_stats.cpp',
+]
+
+internal_headers = [
+  'catch_all.hpp',
+  'matchers/catch_matchers_all.hpp',
+  'generators/catch_generators_all.hpp',
+  'interfaces/catch_interfaces_all.hpp',
+  'matchers/internal/catch_matchers_impl.hpp',
+  'internal/catch_case_insensitive_comparisons.hpp',
+  'internal/catch_console_width.hpp',
+  'internal/catch_container_nonmembers.hpp',
+  'internal/catch_noncopyable.hpp',
+  'catch_approx.hpp',
+  'internal/catch_assertion_handler.hpp',
+  'catch_assertion_info.hpp',
+  'catch_assertion_result.hpp',
+  'internal/catch_test_macro_impl.hpp',
+  'internal/catch_test_failure_exception.hpp',
+  'internal/catch_case_sensitive.hpp',
+  'internal/catch_clara.hpp',
+  'internal/catch_commandline.hpp',
+  'internal/catch_source_line_info.hpp',
+  'internal/catch_compiler_capabilities.hpp',
+  'catch_config.hpp',
+  'internal/catch_config_android_logwrite.hpp',
+  'internal/catch_config_counter.hpp',
+  'internal/catch_config_uncaught_exceptions.hpp',
+  'internal/catch_config_wchar.hpp',
+  'internal/catch_console_colour.hpp',
+  'internal/catch_context.hpp',
+  'internal/catch_debug_console.hpp',
+  'internal/catch_debugger.hpp',
+  'internal/catch_decomposer.hpp',
+  'internal/catch_enforce.hpp',
+  'internal/catch_enum_values_registry.hpp',
+  'internal/catch_errno_guard.hpp',
+  'internal/catch_exception_translator_registry.hpp',
+  'internal/catch_fatal_condition_handler.hpp',
+  'internal/catch_floating_point_helpers.hpp',
+  'internal/catch_istream.hpp',
+  'internal/catch_unique_name.hpp',
+  'internal/catch_sharding.hpp',
+  'generators/catch_generator_exception.hpp',
+  'generators/catch_generators.hpp',
+  'generators/catch_generators_adapters.hpp',
+  'generators/catch_generators_random.hpp',
+  'generators/catch_generators_range.hpp',
+  'interfaces/catch_interfaces_capture.hpp',
+  'interfaces/catch_interfaces_config.hpp',
+  'interfaces/catch_interfaces_enum_values_registry.hpp',
+  'interfaces/catch_interfaces_exception.hpp',
+  'interfaces/catch_interfaces_generatortracker.hpp',
+  'interfaces/catch_interfaces_registry_hub.hpp',
+  'interfaces/catch_interfaces_reporter.hpp',
+  'interfaces/catch_interfaces_reporter_factory.hpp',
+  'interfaces/catch_interfaces_reporter_registry.hpp',
+  'interfaces/catch_interfaces_tag_alias_registry.hpp',
+  'interfaces/catch_interfaces_testcase.hpp',
+  'internal/catch_lazy_expr.hpp',
+  'internal/catch_leak_detector.hpp',
+  'internal/catch_list.hpp',
+  'matchers/catch_matchers.hpp',
+  'matchers/catch_matchers_container_properties.hpp',
+  'matchers/catch_matchers_contains.hpp',
+  'matchers/catch_matchers_exception.hpp',
+  'matchers/catch_matchers_floating_point.hpp',
+  'matchers/catch_matchers_predicate.hpp',
+  'matchers/catch_matchers_quantifiers.hpp',
+  'matchers/catch_matchers_string.hpp',
+  'matchers/catch_matchers_templated.hpp',
+  'matchers/catch_matchers_vector.hpp',
+  'catch_message.hpp',
+  'internal/catch_message_info.hpp',
+  'internal/catch_meta.hpp',
+  'internal/catch_move_and_forward.hpp',
+  'internal/catch_optional.hpp',
+  'internal/catch_output_redirect.hpp',
+  'internal/catch_platform.hpp',
+  'internal/catch_polyfills.hpp',
+  'internal/catch_preprocessor.hpp',
+  'internal/catch_preprocessor_remove_parens.hpp',
+  'internal/catch_random_number_generator.hpp',
+  'internal/catch_random_seed_generation.hpp',
+  'internal/catch_reporter_registry.hpp',
+  'internal/catch_reporter_spec_parser.hpp',
+  'internal/catch_result_type.hpp',
+  'internal/catch_run_context.hpp',
+  'internal/catch_section.hpp',
+  'internal/catch_stdstreams.hpp',
+  'catch_section_info.hpp',
+  'catch_session.hpp',
+  'internal/catch_singletons.hpp',
+  'internal/catch_startup_exception_registry.hpp',
+  'internal/catch_reusable_string_stream.hpp',
+  'internal/catch_stream_end_stop.hpp',
+  'internal/catch_string_manip.hpp',
+  'internal/catch_stringref.hpp',
+  'catch_tag_alias.hpp',
+  'catch_get_random_seed.hpp',
+  'catch_tag_alias_autoregistrar.hpp',
+  'internal/catch_tag_alias_registry.hpp',
+  'catch_test_case_info.hpp',
+  'internal/catch_test_case_registry_impl.hpp',
+  'internal/catch_test_case_tracker.hpp',
+  'catch_template_test_macros.hpp',
+  'catch_test_macros.hpp',
+  'internal/catch_template_test_registry.hpp',
+  'internal/catch_test_registry.hpp',
+  'catch_test_spec.hpp',
+  'internal/catch_test_spec_parser.hpp',
+  'internal/catch_textflow.hpp',
+  'catch_timer.hpp',
+  'internal/catch_to_string.hpp',
+  'catch_tostring.hpp',
+  'catch_totals.hpp',
+  'catch_translate_exception.hpp',
+  'internal/catch_uncaught_exceptions.hpp',
+  'internal/catch_unique_ptr.hpp',
+  'internal/catch_void_type.hpp',
+  'catch_version.hpp',
+  'catch_version_macros.hpp',
+  'internal/catch_wildcard_pattern.hpp',
+  'internal/catch_windows_h_proxy.hpp',
+  'internal/catch_xmlwriter.hpp',
+  'internal/catch_test_case_info_hasher.hpp'
+]
+
+internal_sources = [
+  'catch_approx.cpp',
+  'internal/catch_assertion_handler.cpp',
+  'catch_assertion_result.cpp',
+  'internal/catch_clara.cpp',
+  'internal/catch_commandline.cpp',
+  'internal/catch_source_line_info.cpp',
+  'catch_config.cpp',
+  'internal/catch_case_insensitive_comparisons.cpp',
+  'internal/catch_console_colour.cpp',
+  'internal/catch_context.cpp',
+  'internal/catch_debug_console.cpp',
+  'internal/catch_debugger.cpp',
+  'internal/catch_enforce.cpp',
+  'internal/catch_enum_values_registry.cpp',
+  'internal/catch_exception_translator_registry.cpp',
+  'internal/catch_fatal_condition_handler.cpp',
+  'internal/catch_floating_point_helpers.cpp',
+  'internal/catch_istream.cpp',
+  'interfaces/catch_interfaces_generatortracker.cpp',
+  'interfaces/catch_interfaces_reporter.cpp',
+  'internal/catch_list.cpp',
+  'matchers/catch_matchers_floating_point.cpp',
+  'matchers/catch_matchers_quantifiers.cpp',
+  'matchers/catch_matchers_string.cpp',
+  'matchers/catch_matchers_templated.cpp',
+  'catch_message.cpp',
+  'internal/catch_output_redirect.cpp',
+  'catch_registry_hub.cpp',
+  'internal/catch_random_number_generator.cpp',
+  'internal/catch_random_seed_generation.cpp',
+  'internal/catch_reporter_registry.cpp',
+  'internal/catch_reporter_spec_parser.cpp',
+  'internal/catch_result_type.cpp',
+  'internal/catch_run_context.cpp',
+  'internal/catch_section.cpp',
+  'internal/catch_stdstreams.cpp',
+  'catch_session.cpp',
+  'internal/catch_singletons.cpp',
+  'internal/catch_reusable_string_stream.cpp',
+  'internal/catch_stringref.cpp',
+  'internal/catch_string_manip.cpp',
+  'internal/catch_tag_alias_registry.cpp',
+  'catch_test_case_info.cpp',
+  'internal/catch_test_case_registry_impl.cpp',
+  'internal/catch_test_case_tracker.cpp',
+  'internal/catch_test_registry.cpp',
+  'internal/catch_textflow.cpp',
+  'catch_test_spec.cpp',
+  'internal/catch_test_spec_parser.cpp',
+  'catch_timer.cpp',
+  'catch_tostring.cpp',
+  'catch_totals.cpp',
+  'catch_version.cpp',
+  'internal/catch_wildcard_pattern.cpp',
+  'internal/catch_xmlwriter.cpp',
+  'internal/catch_test_case_info_hasher.cpp',
+  'generators/catch_generators_random.cpp',
+  'generators/catch_generator_exception.cpp',
+  'generators/catch_generators.cpp',
+  'matchers/catch_matchers.cpp',
+  'matchers/catch_matchers_container_properties.cpp',
+  'matchers/catch_matchers_exception.cpp',
+  'matchers/catch_matchers_predicate.cpp',
+  'matchers/internal/catch_matchers_impl.cpp',
+  'catch_tag_alias_autoregistrar.cpp',
+  'catch_get_random_seed.cpp',  
+  'internal/catch_decomposer.cpp',
+  'internal/catch_errno_guard.cpp',
+  'internal/catch_lazy_expr.cpp',
+  'internal/catch_leak_detector.cpp',
+  'internal/catch_message_info.cpp',
+  'internal/catch_polyfills.cpp',
+  'internal/catch_startup_exception_registry.cpp',
+  'internal/catch_uncaught_exceptions.cpp',
+  'interfaces/catch_interfaces_capture.cpp',
+  'interfaces/catch_interfaces_config.cpp',
+  'interfaces/catch_interfaces_exception.cpp',
+  'interfaces/catch_interfaces_registry_hub.cpp',
+  'interfaces/catch_interfaces_reporter_factory.cpp',
+  'interfaces/catch_interfaces_reporter_registry.cpp',
+  'interfaces/catch_interfaces_testcase.cpp',
+]
+
+reporter_headers = [
+  'reporters/catch_reporters_all.hpp',
+  'reporters/catch_reporter_automake.hpp',
+  'reporters/catch_reporter_common_base.hpp',
+  'reporters/catch_reporter_compact.hpp',
+  'reporters/catch_reporter_console.hpp',
+  'reporters/catch_reporter_cumulative_base.hpp',
+  'reporters/catch_reporter_event_listener.hpp',
+  'reporters/catch_reporter_helpers.hpp',
+  'reporters/catch_reporter_junit.hpp',
+  'reporters/catch_reporter_multi.hpp',
+  'reporters/catch_reporter_registrars.hpp',
+  'reporters/catch_reporter_sonarqube.hpp',
+  'reporters/catch_reporter_streaming_base.hpp',
+  'reporters/catch_reporter_tap.hpp',
+  'reporters/catch_reporter_teamcity.hpp',
+  'reporters/catch_reporter_xml.hpp'
+]
+
+reporter_sources = [
+  'reporters/catch_reporter_automake.cpp',
+  'reporters/catch_reporter_common_base.cpp',
+  'reporters/catch_reporter_compact.cpp',
+  'reporters/catch_reporter_console.cpp',
+  'reporters/catch_reporter_cumulative_base.cpp',
+  'reporters/catch_reporter_event_listener.cpp',
+  'reporters/catch_reporter_helpers.cpp',
+  'reporters/catch_reporter_junit.cpp',
+  'reporters/catch_reporter_multi.cpp',
+  'reporters/catch_reporter_registrars.cpp',
+  'reporters/catch_reporter_sonarqube.cpp',
+  'reporters/catch_reporter_streaming_base.cpp',
+  'reporters/catch_reporter_tap.cpp',
+  'reporters/catch_reporter_teamcity.cpp',
+  'reporters/catch_reporter_xml.cpp',
+]
+
+headers = benchmark_headers + internal_headers + reporter_headers
+sources = benchmark_sources + internal_sources + reporter_sources
+
+# The headers must be installed with their full paths, which meson
+# v0.63 supports using `preserve_path` for `install_headers`. We'd
+# like to be compatible with Debian 11 (current stable) which has
+# meson v0.56.2. Instead, let's use the technique from
+# https://github.com/mesonbuild/meson/issues/14 with some tweaks to
+# make it compatible with newer meson.
+include_subdir = 'catch2'
+foreach file : headers
+  file_path = file.split('/')
+
+  folder = ''
+  foreach path : file_path
+    if path != file_path[-1]
+      folder = folder / path
+    endif
+  endforeach
+
+  install_headers(file, subdir: join_paths(include_subdir, folder))
+endforeach
+
+catch2 = static_library(
+  'Catch2',
+  sources,
+  include_directories : '..',
+  install : true
+)
+
+catch2_dep = declare_dependency(
+  link_with: catch2,
+  include_directories: '..'
+)
+
+pkg.generate(
+  catch2,
+  filebase: 'catch2',
+  description : 'A modern, C++-native, test framework for C++14 and above',
+  url: 'https://github.com/catchorg/Catch2'
+)
+
+catch2_with_main = static_library(
+  'Catch2Main',
+  [ 'internal/catch_main.cpp' ],
+  link_with: catch2,
+  include_directories : '..',
+  install : true
+)
+
+catch2_with_main_dep = declare_dependency(
+  link_with: [ catch2, catch2_with_main ],
+  include_directories: '..'
+)
+
+pkg.generate(
+  catch2_with_main,
+  filebase : 'catch2-with-main',
+  description : 'A modern, C++-native, test framework for C++14 and above (links in default main)',
+  requires : 'catch2 = ' + meson.project_version()
+)
diff --git a/tests/meson.build b/tests/meson.build
new file mode 100644
index 00000000..a7670a99
--- /dev/null
+++ b/tests/meson.build
@@ -0,0 +1,71 @@
+#              Copyright Catch2 Authors
+# Distributed under the Boost Software License, Version 1.0.
+#   (See accompanying file LICENSE_1_0.txt or copy at
+#        https://www.boost.org/LICENSE_1_0.txt)
+
+# SPDX-License-Identifier: BSL-1.0
+
+# define the sources of the self test
+# Please keep these ordered alphabetically
+self_test_sources = [
+  'SelfTest/TestRegistrations.cpp',
+  'SelfTest/IntrospectiveTests/Clara.tests.cpp',
+  'SelfTest/IntrospectiveTests/CmdLine.tests.cpp',
+  'SelfTest/IntrospectiveTests/CmdLineHelpers.tests.cpp',
+  'SelfTest/IntrospectiveTests/ColourImpl.tests.cpp',
+  'SelfTest/IntrospectiveTests/Details.tests.cpp',
+  'SelfTest/IntrospectiveTests/FloatingPoint.tests.cpp',
+  'SelfTest/IntrospectiveTests/GeneratorsImpl.tests.cpp',
+  'SelfTest/IntrospectiveTests/InternalBenchmark.tests.cpp',
+  'SelfTest/IntrospectiveTests/PartTracker.tests.cpp',
+  'SelfTest/IntrospectiveTests/RandomNumberGeneration.tests.cpp',
+  'SelfTest/IntrospectiveTests/Reporters.tests.cpp',
+  'SelfTest/IntrospectiveTests/Tag.tests.cpp',
+  'SelfTest/IntrospectiveTests/TestCaseInfoHasher.tests.cpp',
+  'SelfTest/IntrospectiveTests/TestSpecParser.tests.cpp',
+  'SelfTest/IntrospectiveTests/TextFlow.tests.cpp',
+  'SelfTest/IntrospectiveTests/Sharding.tests.cpp',
+  'SelfTest/IntrospectiveTests/Stream.tests.cpp',
+  'SelfTest/IntrospectiveTests/String.tests.cpp',
+  'SelfTest/IntrospectiveTests/StringManip.tests.cpp',
+  'SelfTest/IntrospectiveTests/Xml.tests.cpp',
+  'SelfTest/IntrospectiveTests/ToString.tests.cpp',
+  'SelfTest/IntrospectiveTests/UniquePtr.tests.cpp',
+  'SelfTest/TimingTests/Sleep.tests.cpp',
+  'SelfTest/UsageTests/Approx.tests.cpp',
+  'SelfTest/UsageTests/BDD.tests.cpp',
+  'SelfTest/UsageTests/Benchmark.tests.cpp',
+  'SelfTest/UsageTests/Class.tests.cpp',
+  'SelfTest/UsageTests/Compilation.tests.cpp',
+  'SelfTest/UsageTests/Condition.tests.cpp',
+  'SelfTest/UsageTests/Decomposition.tests.cpp',
+  'SelfTest/UsageTests/EnumToString.tests.cpp',
+  'SelfTest/UsageTests/Exception.tests.cpp',
+  'SelfTest/UsageTests/Generators.tests.cpp',
+  'SelfTest/UsageTests/Message.tests.cpp',
+  'SelfTest/UsageTests/Misc.tests.cpp',
+  'SelfTest/UsageTests/ToStringByte.tests.cpp',
+  'SelfTest/UsageTests/ToStringChrono.tests.cpp',
+  'SelfTest/UsageTests/ToStringGeneral.tests.cpp',
+  'SelfTest/UsageTests/ToStringOptional.tests.cpp',
+  'SelfTest/UsageTests/ToStringPair.tests.cpp',
+  'SelfTest/UsageTests/ToStringTuple.tests.cpp',
+  'SelfTest/UsageTests/ToStringVariant.tests.cpp',
+  'SelfTest/UsageTests/ToStringVector.tests.cpp',
+  'SelfTest/UsageTests/ToStringWhich.tests.cpp',
+  'SelfTest/UsageTests/Tricky.tests.cpp',
+  'SelfTest/UsageTests/VariadicMacros.tests.cpp',
+  'SelfTest/UsageTests/MatchersRanges.tests.cpp',
+  'SelfTest/UsageTests/Matchers.tests.cpp'
+]
+
+# This isn't as good as the CMake tests, but it proves that we've
+# actually put something in the library files.
+self_test = executable(
+  'SelfTest',
+  self_test_sources,
+  include_directories : '../src',
+  link_with : [ catch2_with_main, catch2 ]
+)
+
+test('SelfTest', self_test)
diff --git a/tools/scripts/releaseCommon.py b/tools/scripts/releaseCommon.py
index 20ef1b0c..30a07658 100644
--- a/tools/scripts/releaseCommon.py
+++ b/tools/scripts/releaseCommon.py
@@ -15,6 +15,7 @@ versionPath = os.path.join( rootPath, "catch_version.cpp" )
 definePath = os.path.join(rootPath, 'catch_version_macros.hpp')
 readmePath = os.path.join( catchPath, "README.md" )
 cmakePath = os.path.join(catchPath, 'CMakeLists.txt')
+mesonPath = os.path.join(catchPath, 'meson.build')
 
 class Version:
     def __init__(self):
@@ -89,6 +90,16 @@ def updateCmakeFile(version):
             file.write(replacementRegex.sub(replacement, line))
 
 
+def updateMesonFile(version):
+    with open(mesonPath, 'rb') as file:
+        lines = file.readlines()
+    replacementRegex = re.compile(b'''version\s*:\s*'(\\d+.\\d+.\\d+)', # CML version placeholder, don't delete''')
+    replacement = '''version : '{0}', # CML version placeholder, don't delete'''.format(version.getVersionString()).encode('ascii')
+    with open(mesonPath, 'wb') as file:
+        for line in lines:
+            file.write(replacementRegex.sub(replacement, line))
+
+
 def updateVersionDefine(version):
     # First member of the tuple is the compiled regex object, the second is replacement if it matches
     replacementRegexes = [(re.compile(b'#define CATCH_VERSION_MAJOR \\d+'),'#define CATCH_VERSION_MAJOR {}'.format(version.majorVersion).encode('ascii')),
@@ -132,4 +143,5 @@ def performUpdates(version):
     generateAmalgamatedFiles.generate_cpp()
 
     updateCmakeFile(version)
+    updateMesonFile(version)
     updateDocumentationVersionPlaceholders(version)