Squashed commit of the following:

commit 2bef80eec1fe16a23e34143b9a5a32b04d612ed2
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 20:11:36 2021 +0200

    wip

commit e8c063d7ea66d2bdcbd1535b12dac1ca24afc7b9
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 20:05:04 2021 +0200

    wip

commit aafdebf274cafacfd6e1472621b015e48d547412
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 19:50:39 2021 +0200

    wip

commit b36f13655a09c3bac62afc6079ba010eb934493d
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 18:05:35 2021 +0200

    wip

commit eee191875c0d6816022342d341eaa43f5f83c4ff
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 17:32:35 2021 +0200

    more wip

commit 0ff949ab5f21055298aee8d7fcdda3a10f61a69c
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 17:12:18 2021 +0200

    wip

commit ca68861cb4c4e14079bb3ab2e0c9725b0a3aece8
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 16:31:32 2021 +0200

    wip

commit e188a3d2cca4f4bb84c3fa8f49e5de34ec731713
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 16:21:51 2021 +0200

    wip

commit b8383ac22cdb5bab3a4f527a1c46dafd009b2f11
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 16:15:42 2021 +0200

    Workflow wip...

commit 162416fe2cf2922382c7c7fd34c648b4782d48be
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 15:57:31 2021 +0200

    Workflow wip...

commit 891be4cdd72b23ec86bdc0935d9201841c2c07bc
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 15:52:24 2021 +0200

    Workflow wip...

commit 5c2ee653f41a38858cfaf602df639276ae1c7fbb
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 15:44:59 2021 +0200

    Workflow wip...

commit bca8df081885aed67ce0952f20aa2e4a96072a04
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 15:40:23 2021 +0200

    Workflow wip...

commit d94d8de098d954bffae65aec789d72c5c0b1301b
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sun Jul 4 15:34:16 2021 +0200

    Workflow wip...

commit 19f301992b733e699054050fdf552c982fea300c
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sat Jul 3 21:54:11 2021 +0200

    Workflow wip...

commit 495457726fc844d014e49b56acd6367160f4322b
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sat Jul 3 18:38:04 2021 +0200

    workflow wip

commit fde42cd4a5f865807703ff6814d9d0e8dfbde030
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sat Jul 3 18:34:47 2021 +0200

    Testing more generic workflow.

commit ead40cc153814e23ef3ddcb654ed8c57c10f54a6
Author: Steffen Schuemann <s.schuemann@pobox.com>
Date:   Sat Jul 3 16:51:25 2021 +0200

    Work on using GitHub workflows.

.github/workflows/build_cmake.yml

@@ -0,0 +1,197 @@
+name: CMake Build Matrix
+
+on: [ push, pull_request ]
+
+jobs:
+  build:
+    name: ${{ matrix.config.name }}
+    runs-on: ${{ matrix.config.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - name: "Ubuntu 20.04 GCC 9.3"
+            os: ubuntu-20.04
+            build_type: Release
+            packages: ninja-build
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
+            cc: gcc
+            cxx: g++
+
+          - name: "Ubuntu 20.04 Clang 10.0"
+            os: ubuntu-20.04
+            build_type: Release
+            packages: ninja-build
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
+            cc: clang-10
+            cxx: clang++-10
+
+          - name: "Ubuntu 20.04 Clang 11.0"
+            os: ubuntu-20.04
+            build_type: Release
+            packages: ninja-build clang-11 libc++-11-dev libc++abi-11-dev
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
+            cc: clang-11
+            cxx: clang++-11
+
+          - name: "Ubuntu 20.04 GCC 9.3 coverage"
+            os: ubuntu-20.04
+            build_type: Debug
+            packages: ninja-build lcov
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
+            cc: gcc
+            cxx: g++
+
+          - name: "Ubuntu 18.04 GCC 8.4"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build gcc-8 g++-8
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: gcc-8
+            cxx: g++-8
+
+          - name: "Ubuntu 18.04 GCC 7.5"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: gcc-7
+            cxx: g++-7
+
+          - name: "Ubuntu 18.04 GCC 6.5"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build gcc-6 g++-6
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: gcc-6
+            cxx: g++-6
+
+          - name: "Ubuntu 18.04 GCC 5.5"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build gcc-5 g++-5
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: gcc-5
+            cxx: g++-5
+
+          - name: "Ubuntu 18.04 Clang 9.0"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build libc++-9-dev libc++abi-9-dev
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
+            cc: clang
+            cxx: clang++
+
+          - name: "Ubuntu 16.04 Clang 6.0"
+            os: ubuntu-16.04
+            build_type: Release
+            packages: ninja-build clang-6.0
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: clang-6.0
+            cxx: clang++-6.0
+
+          - name: "Ubuntu 16.04 Clang 5.0"
+            os: ubuntu-16.04
+            build_type: Release
+            packages: ninja-build clang-5.0
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: clang-5.0
+            cxx: clang++-5.0
+
+          - name: "Windows MSVC 2019"
+            os: windows-latest
+            build_type: Release
+            packages: ninja
+            generator: "Visual Studio 16 2019"
+            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
+            cc: cl
+            cxx: cl
+
+          - name: "macOS 10.15 AppleClang"
+            os: macos-10.15
+            build_type: Release
+            packages: ninja
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: clang
+            cxx: clang++
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: print environment
+        run: |
+          echo github.event.action: ${{ github.event.action }}
+          echo github.event_name: ${{ github.event_name }}
+
+      - name: Install dependencies on Ubuntu
+        if: startsWith(matrix.config.os, 'ubuntu')
+        shell: bash
+        run: |
+          sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
+          sudo apt update
+          sudo apt install ${{ matrix.config.packages }}
+
+      - name: Install dependencies on windows
+        if: startsWith(matrix.config.os, 'windows')
+        run: |
+          choco install ${{ matrix.config.packages }}
+
+      - name: Install dependencies on macOS
+        if: startsWith(matrix.config.os, 'macos')
+        run: |
+          brew install ${{ matrix.config.packages }}
+
+      - name: Configure project
+        shell: bash
+        run: |
+          export CC=${{ matrix.config.cc }}
+          export CXX=${{ matrix.config.cxx }}
+          ninja --version
+          cmake --version
+          mkdir build
+          mkdir install
+          if [[ "${{ matrix.config.build_type }}" == "Debug" ]]; then
+            cmake -G "${{ matrix.config.generator }}" -S . -B build -DCMAKE_BUILD_TYPE=Debug -DGHC_COVERAGE=ON -DGHC_FILESYSTEM_TEST_COMPILE_FEATURES="${{ matrix.config.compatibility }}" -DCMAKE_INSTALL_PREFIX:PATH=install
+          else
+            cmake -G "${{ matrix.config.generator }}" -S . -B build -DCMAKE_BUILD_TYPE=${{ matrix.config.build_type }} -DGHC_FILESYSTEM_TEST_COMPILE_FEATURES="${{ matrix.config.compatibility }}" -DCMAKE_INSTALL_PREFIX:PATH=install
+          fi
+
+      - name: Build project
+        shell: bash
+        run: |
+          cmake --build build --config ${{ matrix.config.build_type }}
+
+      - name: Run tests
+        run: |
+          cd build && ctest -C ${{ matrix.config.build_type }}
+
+      - name: Collect coverage info
+        if: startsWith(matrix.config.build_type, 'Debug')
+        run: |
+          cd build
+          lcov --compat-libtool --directory . --capture --output-file coverage_output.info
+          lcov --remove coverage_output.info '/usr/*' '*/c++/*' '*.h' '*/catch.hpp' -o coverage.info
+          # sed -i 's|SF:/.*/filesystem/|SF:../|g' coverage.info
+
+      - name: Upload coverage info
+        if: startsWith(matrix.config.build_type, 'Debug')
+        env:
+          COVERALLS_DEBUG: true
+          NODE_COVERALLS_DEBUG: 1
+        uses: coverallsapp/github-action@master
+        with:
+          path-to-lcov: ${{ github.workspace }}/build/coverage.info
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+

.travis.yml

@@ -1,100 +0,0 @@
-language: cpp
-
-dist: xenial # default distribution
-os: linux # default os
-sudo: false
-
-
-matrix:
-  fast_finish: true
-  include:
-    - env: MATRIX_EVAL="CC=gcc-5 && CXX=g++-5 && GENERATOR='Unix Makefiles' && CONFIG=Release"
-      addons: { apt: { packages: ["g++-5"], sources: ["ubuntu-toolchain-r-test"] } }
-
-    - env: MATRIX_EVAL="CC=gcc-6 && CXX=g++-6 && GENERATOR='Unix Makefiles' && CONFIG=Release"
-      addons: { apt: { packages: ["g++-6"], sources: ["ubuntu-toolchain-r-test"] } }
-
-    - env: MATRIX_EVAL="CC=gcc-7 && CXX=g++-7 && GENERATOR='Unix Makefiles' && CONFIG=Release"
-      addons: { apt: { packages: ["g++-7"], sources: ["ubuntu-toolchain-r-test"] } }
-
-    - env: MATRIX_EVAL="CC=gcc-7 && CXX=g++-7 && GENERATOR='Unix Makefiles' && CONFIG=Debug && GHC_COVERAGE=1"
-      addons: { apt: { packages: ["g++-7", "lcov"], sources: ["ubuntu-toolchain-r-test"] } }
-
-    - env: MATRIX_EVAL="CC=gcc-8 && CXX=g++-8 && GENERATOR='Unix Makefiles' && CONFIG=Release"
-      addons: { apt: { packages: ["g++-8"], sources: ["ubuntu-toolchain-r-test"] } }
-
-    - env: MATRIX_EVAL="CC=gcc-9 && CXX=g++-9 && GENERATOR='Unix Makefiles' && CONFIG=Release"
-      addons: { apt: { packages: ["g++-9"], sources: ["ubuntu-toolchain-r-test"] } }
-
-    - env: MATRIX_EVAL="CC=clang-5.0 && CXX=clang++-5.0 && GENERATOR='Unix Makefiles' && CONFIG=Release"
-      addons: { apt: { packages: ["clang-5.0"] } }
-
-    - env: MATRIX_EVAL="CC=clang-6.0 && CXX=clang++-6.0 && GENERATOR='Unix Makefiles' && CONFIG=Release"
-      addons: { apt: { packages: ["clang-6.0"] } }
-
-    - env: MATRIX_EVAL="CC=clang-7 && CXX=clang++-7 && GENERATOR='Unix Makefiles' && CONFIG=Release"
-      addons: { apt: { packages: ["clang-7", "libc++-7-dev", "libc++abi-7-dev"], sources: ["llvm-toolchain-xenial-7"] } }
-
-    - env: MATRIX_EVAL="CC=clang-8 && CXX=clang++-8 && GENERATOR='Unix Makefiles' && CONFIG=Release"
-      addons: { apt: { packages: ["clang-8", "libc++-8-dev", "libc++abi-8-dev"], sources: ["llvm-toolchain-xenial-8"] } }
-
-    - env: MATRIX_EVAL="CC=clang-9 && CXX=clang++-9 && GENERATOR='Unix Makefiles' && CONFIG=Release"
-      addons: { apt: { packages: ["clang-9", "libc++-9-dev", "libc++abi-9-dev"], sources: [{sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main', key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'}] } }
-
-    - os: osx
-      env: MATRIX_EVAL="CC=clang && CXX=clang++ && GENERATOR=Xcode && CONFIG=Release"
-      osx_image: xcode9.2
-
-    - os: osx
-      env: MATRIX_EVAL="CC=clang && CXX=clang++ && GENERATOR=Xcode && CONFIG=Release"
-      osx_image: xcode10.1
-
-    - os: osx
-      env: MATRIX_EVAL="CC=clang && CXX=clang++ && GENERATOR=Xcode && CONFIG=Release"
-      osx_image: xcode11.3
-
-install:
-  - eval "${MATRIX_EVAL}"
-  - |
-    if [ "${GHC_COVERAGE}" = "1" ]; then
-      gem install coveralls-lcov
-    fi
-  - $CC --version
-  - $CXX --version
-  - cmake --version
-
-before_script:
-  - eval "${MATRIX_EVAL}"
-  - mkdir build
-  - cd build
-  - export VERBOSE=1
-  - |
-    if [ "${CONFIG}" = "Debug" ]; then
-      cmake -G"${GENERATOR}" -DCMAKE_CXX_COMPILER=${CXX} -DCMAKE_C_COMPILER=${CC} -DCMAKE_BUILD_TYPE=${CONFIG} -DGHC_COVERAGE=ON ..
-    else
-      cmake -G"${GENERATOR}" -DCMAKE_CXX_COMPILER=${CXX} -DCMAKE_C_COMPILER=${CC} -DCMAKE_BUILD_TYPE=${CONFIG} ..
-    fi
-
-script:
-  - export VERBOSE=1
-  - cmake --build . --config ${CONFIG} --target filesystem_test
-  - |
-    if [ "${GHC_COVERAGE}" = "1" ]; then
-      cmake --build . --config ${CONFIG} --target filesystem_test
-      test/filesystem_test
-    else
-      cmake --build . --config ${CONFIG}
-      ctest -C ${CONFIG} -E Windows
-      if [ -f "test/std_filesystem_test" ]; then
-        test/std_filesystem_test || true
-      fi
-    fi
-
-after_success:
-  - |
-    if [ "${GHC_COVERAGE}" = "1" ]; then
-      lcov --compat-libtool --directory . --capture --output-file coverage_output.info
-      lcov --remove coverage_output.info '/usr/*' '*/c++/*' '*.h' '*/catch.hpp' -o coverage.info
-      sed -i 's|SF:/.*/filesystem/|SF:../|g' coverage.info
-      coveralls-lcov coverage.info
-    fi

CMakeLists.txt

@@ -32,6 +32,7 @@ endif()
 if(CMAKE_CXX_STANDARD LESS 11)
     message(FATAL_ERROR "CMAKE_CXX_STANDARD is less than 11, ghc::filesystem only works with C++11 and above.")
 endif()
+message(STATUS "CMAKE_CXX_COMPILE_FEATURES: ${CMAKE_CXX_COMPILE_FEATURES}")
 
 add_library(ghc_filesystem INTERFACE)
 target_include_directories(ghc_filesystem INTERFACE

README.md

@@ -1,18 +1,45 @@
 ![Supported Platforms](https://img.shields.io/badge/platform-macOS%20%7C%20Linux%20%7C%20Windows%20%7C%20FreeBSD-blue.svg)
 ![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)
-[![Build Status](https://travis-ci.org/gulrak/filesystem.svg?branch=master)](https://travis-ci.org/gulrak/filesystem)
+[![CMake Build Matrix](https://github.com/gulrak/filesystem/actions/workflows/build_cmake.yml/badge.svg?branch=master)](https://github.com/gulrak/filesystem/actions/workflows/build_cmake.yml)
 [![Build Status](https://ci.appveyor.com/api/projects/status/t07wp3k2cddo0hpo/branch/master?svg=true)](https://ci.appveyor.com/project/gulrak/filesystem)
 [![Build Status](https://api.cirrus-ci.com/github/gulrak/filesystem.svg?branch=master)](https://cirrus-ci.com/github/gulrak/filesystem)
 [![Build Status](https://cloud.drone.io/api/badges/gulrak/filesystem/status.svg?ref=refs/heads/master)](https://cloud.drone.io/gulrak/filesystem)
 [![Coverage Status](https://coveralls.io/repos/github/gulrak/filesystem/badge.svg?branch=master)](https://coveralls.io/github/gulrak/filesystem?branch=master)
 [![Latest Release Tag](https://img.shields.io/github/tag/gulrak/filesystem.svg)](https://github.com/gulrak/filesystem/tree/v1.5.8)
 
+- [Filesystem](#filesystem)
+  - [Motivation](#motivation)
+  - [Why the namespace GHC?](#why-the-namespace-ghc)
+  - [Platforms](#platforms)
+  - [Tests](#tests)
+  - [Usage](#usage)
+    - [Downloads](#downloads)
+    - [Using it as Single-File-Header](#using-it-as-single-file-header)
+    - [Using it as Forwarding-/Implementation-Header](#using-it-as-forwarding-implementation-header)
+    - [Git Submodule and CMake](#git-submodule-and-cmake)
+    - [Versioning](#versioning)
+  - [Documentation](#documentation)
+    - [`ghc::filesystem::ifstream`, `ghc::filesystem::ofstream`, `ghc::filesystem::fstream`](#ghcfilesystemifstream-ghcfilesystemofstream-ghcfilesystemfstream)
+    - [`ghc::filesystem::u8arguments`](#ghcfilesystemu8arguments)
+  - [Differences](#differences)
+    - [LWG Defects](#lwg-defects)
+    - [Not Implemented on C++ before C++17](#not-implemented-on-c-before-c17)
+    - [Differences in API](#differences-in-api)
+      - [Differences of Specific Interfaces](#differences-of-specific-interfaces)
+    - [Differences in Behavior](#differences-in-behavior)
+      - [fs.path](#fspath-refhttpsencppreferencecomwcppfilesystempath)
+  - [Open Issues](#open-issues)
+    - [Windows](#windows)
+      - [Symbolic Links on Windows](#symbolic-links-on-windows)
+      - [Permissions](#permissions)
+  - [Release Notes](#release-notes)
+  
 # Filesystem
 
 This is a header-only single-file `std::filesystem` compatible helper library,
 based on the C++17 and C++20 specs, but implemented for C++11, C++14, C++17 or C++20
 (tightly following  the C++17 standard with very few documented exceptions). It is currently tested on
-macOS 10.12/10.14/10.15, Windows 10, Ubuntu 18.04, CentOS 7, CentOS 8, FreeBSD 12
+macOS 10.12/10.14/10.15, Windows 10, Ubuntu 18.04, Ubuntu 20.04, CentOS 7, CentOS 8, FreeBSD 12
 and Alpine ARM/ARM64 Linux but should work on other systems too, as long as you have
 at least a C++11 compatible compiler. It should work with Android NDK, Emscripten and I even
 had reports of it being used on iOS (within sandboxing constraints) and with v1.5.6 there
@@ -556,6 +583,12 @@ to the expected behavior.
 
 ## Release Notes
 
+### v1.6.0 (wip)
+
+* Replaced _travis-ci.org_  with GitHub Workflow for the configurations:
+  Ubuntu 20.04: GCC 9.3, Ubuntu 18.04: GCC 7.5, GCC 8.4, macOS 10.15: Xcode 12.4,
+  Windows 10: Visual Studio 2019
+
 ### [v1.5.8](https://github.com/gulrak/filesystem/releases/tag/v1.5.8)
 
 * Fix for [#125]((https://github.com/gulrak/filesystem/issues/124), where

cmake/GhcHelper.cmake

@@ -52,7 +52,8 @@ macro(AddTestExecutableWithStdCpp cppStd)
             $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Werror -Wno-error=deprecated-declarations>
             $<$<CXX_COMPILER_ID:GNU>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Wno-psabi -Werror -Wno-error=deprecated-declarations>
             $<$<CXX_COMPILER_ID:MSVC>:/WX /wd4996>
-            $<$<BOOL:${CYGWIN}>:-Wa,-mbig-obj>)
+            $<$<BOOL:${CYGWIN}>:-Wa,-mbig-obj>
+            $<$<BOOL:${GHC_COVERAGE}>:--coverage>)
     if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
         target_compile_definitions(filesystem_test_cpp${cppStd} PRIVATE _CRT_SECURE_NO_WARNINGS)
     endif()

include/ghc/filesystem.hpp

@@ -301,7 +301,7 @@
 //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
 // ghc::filesystem version in decimal (major * 10000 + minor * 100 + patch)
-#define GHC_FILESYSTEM_VERSION 10508L
+#define GHC_FILESYSTEM_VERSION 10509L
 
 #if !defined(GHC_WITH_EXCEPTIONS) && (defined(__EXCEPTIONS) || defined(__cpp_exceptions) || defined(_CPPUNWIND))
 #define GHC_WITH_EXCEPTIONS

test/CMakeLists.txt

@@ -13,6 +13,12 @@ if(GHC_COVERAGE)
         target_compile_options(filesystem_test PUBLIC --coverage)
     endif()
     target_link_libraries(filesystem_test PUBLIC ghc_filesystem --coverage)
+    if("cxx_std_17" IN_LIST GHC_FILESYSTEM_TEST_COMPILE_FEATURES)
+        AddTestExecutableWithStdCpp(17 filesystem_test.cpp catch.hpp)
+    endif()
+    if("cxx_std_20" IN_LIST GHC_FILESYSTEM_TEST_COMPILE_FEATURES)
+        AddTestExecutableWithStdCpp(20 filesystem_test.cpp catch.hpp)
+    endif()
 else()
     message("Generating test runner for normal test...")
     add_executable(filesystem_test filesystem_test.cpp catch.hpp)