[ci] Install graphviz system-widely (#4238)

* Install graphviz from default conda channel

* Update test.sh

* Update setup.sh

* Update test.sh

* Update setup.sh

* Update setup.sh

* Update setup.sh

* Update setup.sh

* Update setup.sh

* Update setup.sh

.ci/setup.sh

@@ -17,6 +17,7 @@ if [[ $OS_NAME == "macos" ]]; then
     if [[ $TASK == "swig" ]]; then
         brew install swig
     fi
+    brew install graphviz
     curl -sL -o conda.sh https://repo.anaconda.com/miniconda/Miniconda3-latest-MacOSX-x86_64.sh
 else  # Linux
     if [[ $IN_UBUNTU_LATEST_CONTAINER == "true" ]]; then
@@ -25,13 +26,10 @@ else  # Linux
         echo 'debconf debconf/frontend select Noninteractive' | sudo debconf-set-selections
 
         sudo apt-get update
-        sudo apt-get install -y --no-install-recommends \
+        sudo apt-get install --no-install-recommends -y \
             software-properties-common
 
-        sudo add-apt-repository -y ppa:git-core/ppa
-        sudo apt-get update
-
-        sudo apt-get install -y --no-install-recommends \
+        sudo apt-get install --no-install-recommends -y \
             apt-utils \
             build-essential \
             ca-certificates \
@@ -64,12 +62,16 @@ else  # Linux
     fi
     if [[ $TASK == "mpi" ]]; then
         sudo apt-get update
-        sudo apt-get install --no-install-recommends -y libopenmpi-dev openmpi-bin
+        sudo apt-get install --no-install-recommends -y \
+            libopenmpi-dev \
+            openmpi-bin
     fi
     if [[ $TASK == "gpu" ]]; then
         sudo add-apt-repository ppa:mhier/libboost-latest -y
         sudo apt-get update
-        sudo apt-get install --no-install-recommends -y libboost1.74-dev ocl-icd-opencl-dev
+        sudo apt-get install --no-install-recommends -y \
+            libboost1.74-dev \
+            ocl-icd-opencl-dev
         cd $BUILD_DIRECTORY  # to avoid permission errors
         curl -sL -o AMD-APP-SDKInstaller.tar.bz2 https://github.com/microsoft/LightGBM/releases/download/v2.0.12/AMD-APP-SDKInstaller-v3.0.130.136-GA-linux64.tar.bz2
         tar -xjf AMD-APP-SDKInstaller.tar.bz2
@@ -79,11 +81,13 @@ else  # Linux
         mv $AMDAPPSDK_PATH/lib/x86_64/sdk/* $AMDAPPSDK_PATH/lib/x86_64/
         echo libamdocl64.so > $OPENCL_VENDOR_PATH/amdocl64.icd
     fi
+    ARCH=$(uname -m)
     if [[ $TASK == "cuda" ]]; then
         echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
         apt-get update
         apt-get install --no-install-recommends -y \
             curl \
+            graphviz \
             libxau6 \
             libxext6 \
             libxrender1 \
@@ -99,9 +103,18 @@ else  # Linux
         apt-get update
         apt-get install --no-install-recommends -y \
             cmake
+    else
+        if [[ $ARCH != "x86_64" ]]; then
+            yum update -y
+            yum install -y \
+                graphviz
+        else
+            sudo apt-get update
+            sudo apt-get install --no-install-recommends -y \
+                graphviz
+        fi
     fi
     if [[ $SETUP_CONDA != "false" ]]; then
-        ARCH=$(uname -m)
         if [[ $ARCH == "x86_64" ]]; then
             curl -sL -o conda.sh https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh
         else

.ci/test.sh

@@ -105,13 +105,7 @@ if [[ $TASK == "swig" ]]; then
 fi
 
 conda install -q -y -n $CONDA_ENV cloudpickle dask distributed joblib matplotlib numpy pandas psutil pytest scikit-learn scipy
-
-# graphviz must come from conda-forge to avoid this on some linux distros:
-# https://github.com/conda-forge/graphviz-feedstock/issues/18
-conda install -q -y \
-    -n $CONDA_ENV \
-    -c conda-forge \
-        python-graphviz
+pip install graphviz  # python-graphviz from Anaconda is not allowed to be installed with Python 3.9
 
 if [[ $OS_NAME == "macos" ]] && [[ $COMPILER == "clang" ]]; then
     # fix "OMP: Error #15: Initializing libiomp5.dylib, but found libomp.dylib already initialized." (OpenMP library conflict due to conda's MKL)