Stop using Travis CI which doesn't work any longer

Unfortunately Travis CI can't be used for building open source projects
any longer in practice, as extra credits must be manually requested
every time from Travis support, which is just infeasible, as this would
need to be done every couple of days if not more often, and support
reply time is anything from a couple of days to more than a month.

So stop even trying to use it, as it doesn't work anyhow, and switch to
using GitHub Actions only.

Closes #2067

5 files changed, 1 insertions, 576 deletions

diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index c11479fed..000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,499 +0,0 @@
-language: cpp
-matrix:
-  include:
-    - compiler: clang
-      os: linux
-      env: SWIGLANG=
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG= BUILDSYSTEM=cmake
-      dist: xenial
-    - os: linux
-      env: SWIGLANG= GCC=4.4
-      dist: xenial
-    - os: linux
-      env: SWIGLANG= GCC=4.6
-      dist: xenial
-    - os: linux
-      env: SWIGLANG= GCC=4.7
-      dist: xenial
-    - os: linux
-      env: SWIGLANG= GCC=4.8
-      dist: xenial
-    - os: linux
-      env: SWIGLANG= GCC=4.9
-      dist: xenial
-    - os: linux
-      env: SWIGLANG= GCC=6
-      dist: xenial
-    - os: linux
-      env: SWIGLANG= GCC=7
-      dist: xenial
-    - os: linux
-      env: SWIGLANG= GCC=8
-      dist: xenial
-    - os: linux
-      env: SWIGLANG= GCC=9
-      dist: xenial
-    - os: linux
-      env: SWIGLANG= GCC=10
-      dist: focal
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=csharp
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=d VER=2.066.0
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=d VER=2.086.1
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=go VER=1.3
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=go VER=1.8
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=go VER=1.12 CSTD=gnu99
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=go VER=1.16 CSTD=gnu99
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=guile
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=java
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=javascript ENGINE=node VER=6 CPP11=1
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=javascript ENGINE=node VER=8 CPP11=1
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=javascript ENGINE=node VER=10 CPP11=1
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=javascript ENGINE=node VER=12 CPP11=1
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=javascript ENGINE=node VER=14 CPP11=1
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=javascript ENGINE=node VER=16 CPP14=1
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=javascript ENGINE=jsc
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=javascript ENGINE=v8
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=lua
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=lua VER=5.3
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=mzscheme
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ocaml
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=octave SWIGJOBS=-j2
-      dist: xenial   # Octave v4.0.0
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=octave SWIGJOBS=-j2 CPP11=1
-      dist: bionic   # Octave v4.2.2
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=perl5
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=php VER=7.4
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=php VER=8.0
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=php VER=7.0 CONFIGOPTS=--enable-cpp11-testing CPPSTD=c++11
-      dist: bionic
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=php VER=7.1 CONFIGOPTS=--enable-cpp11-testing CPPSTD=c++11
-      dist: bionic
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=php VER=7.2 CONFIGOPTS=--enable-cpp11-testing CPPSTD=c++11
-      dist: bionic
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=php VER=7.3 CONFIGOPTS=--enable-cpp11-testing CPPSTD=c++11
-      dist: bionic
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=php VER=7.4 CONFIGOPTS=--enable-cpp11-testing CPPSTD=c++11
-      dist: bionic
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=php VER=8.0 CONFIGOPTS=--enable-cpp11-testing CPPSTD=c++11
-      dist: bionic
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python # 2.7
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python PY3=3 VER=3.2
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python PY3=3 VER=3.3
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python PY3=3 VER=3.4
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python PY3=3 VER=3.5
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python PY3=3 VER=3.6
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python PY3=3 VER=3.7
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python PY3=3 VER=3.8
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python PY3=3 VER=3.9
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-builtin
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES="-builtin -O"
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-builtin GCC=6 CPP11=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-builtin GCC=6 CPP11=1 PY3=3 VER=3.9
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-builtin PY3=3 VER=3.4
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-builtin PY3=3 VER=3.5
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-builtin PY3=3 VER=3.7
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-builtin PY3=3 VER=3.8
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-builtin PY3=3 VER=3.9
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES="-builtin -O" PY3=3 VER=3.9
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-builtin PY3=3 VER=3.9 SWIGOPTPY3=
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-O
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=python SWIG_FEATURES=-O PY3=3 VER=3.9
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=r
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ruby VER=1.9
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ruby VER=2.0
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ruby VER=2.1
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ruby VER=2.2
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ruby VER=2.3
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ruby VER=2.4
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ruby VER=2.5
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ruby VER=2.6
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ruby VER=2.7
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ruby VER=3.0 CSTD=c99
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=scilab
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=tcl
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=csharp CPP11=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=go VER=1.6 CPP11=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=java CPP11=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=python CPP11=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=r CPP11=1 # Note: making 'R CMD SHLIB' use a different compiler is non-trivial
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=ruby CPP11=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=tcl CPP11=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=csharp GCC=6 CPP14=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=go VER=1.6 GCC=6 CPP14=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=java GCC=6 CPP14=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=python GCC=6 CPP14=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=ruby GCC=6 CPP14=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=tcl GCC=6 CPP14=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=java GCC=7 CPP14=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=python GCC=7 CPP14=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=csharp GCC=8 CPP17=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=java GCC=8 CPP17=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=python GCC=8 CPP17=1 PY3=3 VER=3.9
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=csharp GCC=9 CPP17=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=java GCC=9 CPP17=1
-      dist: xenial
-    - os: linux
-      env: SWIGLANG=python GCC=9 CPP17=1 PY3=3 VER=3.9
-      dist: xenial
-    - os: linux
-      arch: s390x
-      env: SWIGLANG=ruby CPP11=1
-      dist: xenial
-    - compiler: gcc
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG= BUILDSYSTEM=cmake
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=csharp
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=go CSTD=gnu99
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=guile CSTD=c11
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=java
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=lua
-# octave-6.1 not working
-#    - compiler: clang
-#      os: osx
-#      osx_image: xcode12.2
-#      env: SWIGLANG=octave SWIGJOBS=-j2 CPP11=1
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=perl5
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=python
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=python PY3=3
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=ruby
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=tcl
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=java CPP17=1
-    - compiler: clang
-      os: osx
-      osx_image: xcode12.2
-      env: SWIGLANG=python PY3=3 CPP17=1
-
-  allow_failures:
-    # Newer version of D not yet working/supported
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=d VER=2.086.1
-      dist: xenial
-    # Experimental languages
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=mzscheme
-      dist: xenial
-    - compiler: gcc
-      os: linux
-      env: SWIGLANG=ocaml
-      dist: xenial
-
-before_install:
-  - date -u
-  - uname -a
-  - if test "$TRAVIS_OS_NAME" = "linux"; then lscpu; grep "model name" /proc/cpuinfo || echo 'Unknown CPU model'; grep "MemTotal" /proc/meminfo || echo 'Unknown system memory amount'; fi
-  - if test "$TRAVIS_OS_NAME" = "osx"; then sysctl -a | grep brand_string; fi
-  # Travis overrides CC environment with compiler predefined values
-  - if test -n "$GCC"; then export CC="gcc-$GCC" && export CXX="g++-$GCC"; fi
-install:
-  - if test "$TRAVIS_OS_NAME" = "linux"; then source Tools/travis-linux-install.sh; fi
-  - if test "$TRAVIS_OS_NAME" = "osx"; then source Tools/travis-osx-install.sh; fi
-  - ls -la $(which $CC) $(which $CXX) && $CC --version && $CXX --version
-script:
-  - if test "$BUILDSYSTEM" = "cmake"; then cmake --version && mkdir -p build/build && cd build/build && CXXFLAGS="-Wall -Wextra -Werror" CFLAGS="-Wall -Wextra -Werror" cmake -DCMAKE_INSTALL_PREFIX=~/.local ../.. && make install && ctest --output-on-failure -V && exit 0; fi
-  - echo 'Configuring...' && echo -en 'travis_fold:start:script.1\\r'
-  - if test -n "$CPP11"; then CONFIGOPTS+=(--enable-cpp11-testing "CXXFLAGS=-std=c++11 $CXXFLAGS" "CFLAGS=-std=c11 $CFLAGS") && export CSTD=c11 && export CPPSTD=c++11; fi
-  - if test -n "$CPP14"; then CONFIGOPTS+=(--enable-cpp11-testing "CXXFLAGS=-std=c++14 $CXXFLAGS" "CFLAGS=-std=c11 $CFLAGS") && export CSTD=c11 && export CPPSTD=c++14; fi
-  - if test -n "$CPP17"; then CONFIGOPTS+=(--enable-cpp11-testing "CXXFLAGS=-std=c++17 $CXXFLAGS" "CFLAGS=-std=c17 $CFLAGS") && export CSTD=c17 && export CPPSTD=c++17; fi
-  - if test -n "$SWIGLANG"; then CONFIGOPTS+=(--without-alllang --with-$WITHLANG); fi
-  - echo "${CONFIGOPTS[@]}"
-  - ./autogen.sh && mkdir -p build/build && cd build/build && ../../configure "${CONFIGOPTS[@]}"
-  - echo -en 'travis_fold:end:script.1\\r'
-  - make -s $SWIGJOBS
-  - ./swig -version && ./swig -pcreversion
-  - if test -z "$SWIGLANG"; then make -s $SWIGJOBS check-ccache; fi
-  - if test -z "$SWIGLANG"; then make -s $SWIGJOBS check-errors-test-suite; fi
-  - echo 'Installing...' && echo -en 'travis_fold:start:script.2\\r'
-  - if test -z "$SWIGLANG"; then sudo make -s install && swig -version && ccache-swig -V; fi
-  - echo -en 'travis_fold:end:script.2\\r'
-  # Stricter compile flags for examples. Various headers and SWIG generated code prevents full use of -pedantic.
-  - if test -n "$SWIGLANG"; then cflags=$($TRAVIS_BUILD_DIR/Tools/testflags.py --language $SWIGLANG --cflags --std=$CSTD --compiler=$CC) && echo $cflags; fi
-  - if test -n "$SWIGLANG"; then cxxflags=$($TRAVIS_BUILD_DIR/Tools/testflags.py --language $SWIGLANG --cxxflags --std=$CPPSTD --compiler=$CC) && echo $cxxflags; fi
-  - if test -n "$SWIGLANG"; then make -s check-$SWIGLANG-version; fi
-  - if test -n "$SWIGLANG"; then make check-$SWIGLANG-enabled; fi
-  - if test -n "$SWIGLANG"; then make $SWIGJOBS check-$SWIGLANG-examples CFLAGS="$cflags" CXXFLAGS="$cxxflags"; fi
-  - if test -n "$SWIGLANG"; then make $SWIGJOBS check-$SWIGLANG-test-suite CFLAGS="$cflags" CXXFLAGS="$cxxflags"; fi
-  - echo 'Cleaning...' && echo -en 'travis_fold:start:script.3\\r'
-  # Skip on osx as often fails with: rm: Resource temporarily unavailable
-  - if test "$TRAVIS_OS_NAME" != "osx"; then make check-maintainer-clean && ../../configure $CONFIGOPTS; fi
-  - echo -en 'travis_fold:end:script.3\\r'
diff --git a/RELEASENOTES b/RELEASENOTES
index da60d543f..c05ccc4ec 100644
--- a/RELEASENOTES
+++ b/RELEASENOTES
@@ -10,6 +10,7 @@ published on the SWIG web site at http://swig.org/release.html.
 SWIG-4.1.0 summary:
 - Add PHP 8 support.
 - PHP wrapping is now done entirely via PHP's C API - no more .php wrapper.
+- GitHub Actions is now used instead of Travis CI for continuous integration.
 
 SWIG-4.0.2 summary:
 - A few fixes around doxygen comment handling.
diff --git a/Tools/brew-install b/Tools/brew-install
deleted file mode 100755
index 39fe22bc2..000000000
--- a/Tools/brew-install
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/bin/bash
-
-# Wrapper around 'brew install' emitting a message every minute if the command is still running.
-# This is used on Travis to ensure the install isn't killed when there is no output over a long period (10 minutes).
-# Usage: brew-install package, where package is the name of the package for brew to install.
-
-seconds=0
-minutes=0
-brew install "$@" &
-while true; do
-  ps -p$! 2>& 1>/dev/null
-  if [ $? = 0 ]; then
-    if [ $seconds = 60 ]; then
-      let seconds=0
-      let minutes=minutes+1
-      echo "brew install $1 still running ($minutes min)"
-    fi
-    sleep 1
-    let seconds=seconds+1
-  else
-    break
-  fi
-done
-wait $!
-exit $?
diff --git a/Tools/travis-linux-install.sh b/Tools/travis-linux-install.sh
deleted file mode 100755
index cb64d57d2..000000000
--- a/Tools/travis-linux-install.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-
-# Install Linux packages where the version has been overridden in .travis.yml
-
-lsb_release -a
-# find location of current script (only works in bash)
-script_dir="$( dirname "${BASH_SOURCE[0]}")"
-
-# run generic script
-RETRY=travis-retry
-source "$script_dir"/CI-linux-install.sh
diff --git a/Tools/travis-osx-install.sh b/Tools/travis-osx-install.sh
deleted file mode 100755
index fc69c6654..000000000
--- a/Tools/travis-osx-install.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/bin/bash
-
-# Install MacOS packages where the version has been overridden in .travis.yml
-
-set -e # exit on failure (same as -o errexit)
-
-# Disable 'brew cleanup', just wastes Travis job run time
-export HOMEBREW_NO_INSTALL_CLEANUP=1
-
-sw_vers
-travis_retry brew update
-echo "Installed packages..."
-travis_retry brew list --versions
-# travis_retry brew install pcre # Travis Xcode-7.3 has pcre
-# travis_retry brew install boost
-
-WITHLANG=$SWIGLANG
-
-case "$SWIGLANG" in
-	"csharp")
-		travis_retry brew install mono
-		;;
-	"lua")
-		travis_retry brew install lua
-		;;
-	"octave")
-		travis_retry Tools/brew-install octave
-		;;
-	"perl5")
-		travis_retry Tools/brew-install perl
-		;;
-	"python")
-		WITHLANG=$SWIGLANG$PY3
-		;;
-	"tcl")
-		travis_retry Tools/brew-install --cask tcl
-		;;
-esac
-
-# Workaround for https://github.com/travis-ci/travis-ci/issues/6522
-set +e # turn off exit on failure (same as +o errexit)