Avoid using HomeBrew on macOS ci builds for failing dependencies

[skip AppVeyor]
Install gsl and srmio from source
Install R and awscli using official installers
Disabled libsamplerate
This is a workaround to avoid a brew update which would force
the use of Qt 5.15 triggering #3611
[publish binaries]

travis/osx/before_install.sh

@@ -11,17 +11,38 @@ brew unlink python@2 # to avoid conflicts with qt/libical dependence on python
 #brew upgrade qt5 # to get 5.15.x
 /usr/local/opt/qt5/bin/qmake --version
 
-brew install gsl
 brew install libical
 brew upgrade libusb
-brew install srmio
-brew install libsamplerate
+#brew install libsamplerate
 rm -rf '/usr/local/include/c++'
-brew install r
 ## Disable KML for now
 ## brew install --HEAD travis/libkml.rb
 sudo chmod -R +w /usr/local
 
+# GSL - install from source due to homebrew issues
+curl -k -O https://ftp.gnu.org/gnu/gsl/gsl-2.6.tar.gz
+tar xf gsl-2.6.tar.gz
+cd gsl-2.6
+sudo chown -R $USER .
+./configure && make -j3 --silent
+sudo make install
+cd ..
+
+# R 4.1.1
+curl -L -O https://cran.r-project.org/bin/macosx/base/R-4.1.1.pkg
+sudo installer -pkg R-4.1.1.pkg -target /
+R --version
+
+# SRMIO
+curl -L -O https://github.com/rclasen/srmio/archive/v0.1.1git1.tar.gz
+tar xf v0.1.1git1.tar.gz
+cd srmio-0.1.1git1
+sh genautomake.sh
+./configure --disable-shared --enable-static
+make -j3 --silent
+sudo make install
+cd ..
+
 # D2XX - refresh cache if folder is empty
 if [ -z "$(ls -A D2XX)" ]; then
     curl -O https://www.ftdichip.com/Drivers/D2XX/MacOSX/D2XX1.2.2.dmg
@@ -43,7 +64,8 @@ fi
 sudo cp VLC/lib/libvlc*.dylib /usr/local/lib
 
 # AWS client to upload binaries to S3 bucket
-brew install awscli
+curl -O https://awscli.amazonaws.com/AWSCLIV2.pkg
+sudo installer -pkg AWSCLIV2.pkg -target /
 aws --version
 
 exit

travis/osx/before_script.sh

@@ -10,11 +10,11 @@ python3.7-config --prefix
 
 # Python mandatory packages - refresh cache if folder is empty
 if [ -z "$(ls -A site-packages)" ]; then
-    python3.7 -m pip install -r src/Python/requirements.txt -t site-packages
+    python3.7 -m pip install -q -r src/Python/requirements.txt -t site-packages
 fi
 
 # Python SIP
-curl -L -O https://sourceforge.net/projects/pyqt/files/sip/sip-4.19.8/sip-4.19.8.tar.gz
+curl -k -L -O https://sourceforge.net/projects/pyqt/files/sip/sip-4.19.8/sip-4.19.8.tar.gz
 tar xf sip-4.19.8.tar.gz
 cd sip-4.19.8
 python3.7 configure.py
@@ -30,6 +30,7 @@ sed -i "" "s|#\(CONFIG += release.*\)|\1 static |" src/gcconfig.pri
 sed -i "" "s|#\(QMAKE_CXXFLAGS\).*|\1_RELEASE += -mmacosx-version-min=10.7 -arch x86_64|" src/gcconfig.pri
 sed -i "" "s|^#CloudDB|CloudDB|" src/gcconfig.pri
 sed -i "" "s|^#LIBZ|LIBZ|" src/gcconfig.pri
+# SRMIO
 sed -i "" "s|#\(SRMIO_INSTALL =.*\)|\1 /usr/local|" src/gcconfig.pri
 # D2XX
 sed -i "" "s|libftd2xx.dylib|@executable_path/../Frameworks/libftd2xx.1.2.2.dylib|" src/FileIO/D2XX.cpp
@@ -43,8 +44,9 @@ sed -i "" "s|#\(ICAL_LIBS    =.*\)|\1 -L/usr/local/lib -lical|" src/gcconfig.pri
 sed -i "" "s|#\(LIBUSB_INSTALL =\).*|\1 /usr/local|" src/gcconfig.pri
 sed -i "" "s|#\(LIBUSB_LIBS    =.*\)|\1 -L/usr/local/lib -lusb-1.0|" src/gcconfig.pri
 sed -i "" "s|#\(LIBUSB_USE_V_1 = true.*\)|\1|" src/gcconfig.pri
-sed -i "" "s|#\(SAMPLERATE_INSTALL =\).*|\1 /usr/local|" src/gcconfig.pri
-sed -i "" "s|#\(SAMPLERATE_LIBS =\).*|\1 -L/usr/local/lib -lsamplerate|" src/gcconfig.pri
+# Disable libsamplerate due to HomeBrew install problems
+#sed -i "" "s|#\(SAMPLERATE_INSTALL =\).*|\1 /usr/local|" src/gcconfig.pri
+#sed -i "" "s|#\(SAMPLERATE_LIBS =\).*|\1 -L/usr/local/lib -lsamplerate|" src/gcconfig.pri
 sed -i "" "s|#\(LMFIT_INSTALL =\).*|\1 /usr/local|" src/gcconfig.pri
 sed -i "" "s|#\(DEFINES += GC_HAVE_LION*\)|\1|" src/gcconfig.pri
 sed -i "" "s|#\(HTPATH = ../httpserver.*\)|\1 |" src/gcconfig.pri