[ci] speed up conda setup for some jobs (#5668)

.ci/test.sh

@@ -34,7 +34,63 @@ if [[ "$TASK" == "cpp-tests" ]]; then
     exit 0
 fi
 
-conda create -q -y -n $CONDA_ENV "python=$PYTHON_VERSION[build=*cpython]"
+CONDA_PYTHON_REQUIREMENT="python=$PYTHON_VERSION[build=*cpython]"
+
+if [[ $TASK == "if-else" ]]; then
+    conda create -q -y -n $CONDA_ENV ${CONDA_PYTHON_REQUIREMENT} numpy
+    source activate $CONDA_ENV
+    mkdir $BUILD_DIRECTORY/build && cd $BUILD_DIRECTORY/build && cmake .. && make lightgbm -j4 || exit -1
+    cd $BUILD_DIRECTORY/tests/cpp_tests && ../../lightgbm config=train.conf convert_model_language=cpp convert_model=../../src/boosting/gbdt_prediction.cpp && ../../lightgbm config=predict.conf output_result=origin.pred || exit -1
+    cd $BUILD_DIRECTORY/build && make lightgbm -j4 || exit -1
+    cd $BUILD_DIRECTORY/tests/cpp_tests && ../../lightgbm config=predict.conf output_result=ifelse.pred && python test.py || exit -1
+    exit 0
+fi
+
+if [[ $TASK == "swig" ]]; then
+    mkdir $BUILD_DIRECTORY/build && cd $BUILD_DIRECTORY/build
+    if [[ $OS_NAME == "macos" ]]; then
+        cmake -DUSE_SWIG=ON -DAPPLE_OUTPUT_DYLIB=ON ..
+    else
+        cmake -DUSE_SWIG=ON ..
+    fi
+    make -j4 || exit -1
+    if [[ $OS_NAME == "linux" ]] && [[ $COMPILER == "gcc" ]]; then
+        objdump -T $BUILD_DIRECTORY/lib_lightgbm.so > $BUILD_DIRECTORY/objdump.log || exit -1
+        objdump -T $BUILD_DIRECTORY/lib_lightgbm_swig.so >> $BUILD_DIRECTORY/objdump.log || exit -1
+        python $BUILD_DIRECTORY/helpers/check_dynamic_dependencies.py $BUILD_DIRECTORY/objdump.log || exit -1
+    fi
+    if [[ $PRODUCES_ARTIFACTS == "true" ]]; then
+        cp $BUILD_DIRECTORY/build/lightgbmlib.jar $BUILD_ARTIFACTSTAGINGDIRECTORY/lightgbmlib_$OS_NAME.jar
+    fi
+    exit 0
+fi
+
+if [[ $TASK == "lint" ]]; then
+    conda create -q -y -n $CONDA_ENV \
+        ${CONDA_PYTHON_REQUIREMENT} \
+        cmakelint \
+        cpplint \
+        isort \
+        mypy \
+        pycodestyle \
+        pydocstyle \
+        "r-lintr>=3.0"
+    source activate $CONDA_ENV
+    echo "Linting Python code"
+    pycodestyle --ignore=E501,W503 --exclude=./.nuget,./external_libs . || exit -1
+    pydocstyle --convention=numpy --add-ignore=D105 --match-dir="^(?!^external_libs|test|example).*" --match="(?!^test_|setup).*\.py" . || exit -1
+    isort . --check-only || exit -1
+    mypy --ignore-missing-imports python-package/ || true
+    echo "Linting R code"
+    Rscript ${BUILD_DIRECTORY}/.ci/lint_r_code.R ${BUILD_DIRECTORY} || exit -1
+    echo "Linting C++ code"
+    cpplint --filter=-build/c++11,-build/include_subdir,-build/header_guard,-whitespace/line_length --recursive ./src ./include ./R-package ./swig ./tests || exit -1
+    cmake_files=$(find . -name CMakeLists.txt -o -path "*/cmake/*.cmake")
+    cmakelint --linelength=120 --filter=-convention/filename,-package/stdargs,-readability/wonkycase ${cmake_files} || exit -1
+    exit 0
+fi
+
+conda create -q -y -n $CONDA_ENV "${CONDA_PYTHON_REQUIREMENT}"
 source activate $CONDA_ENV
 
 cd $BUILD_DIRECTORY
@@ -72,60 +128,6 @@ if [[ $TASK == "check-docs" ]] || [[ $TASK == "check-links" ]]; then
     exit 0
 fi
 
-if [[ $TASK == "lint" ]]; then
-    conda install -q -y -n $CONDA_ENV \
-        cmakelint \
-        cpplint \
-        flake8 \
-        isort \
-        mypy \
-        pydocstyle \
-        "r-lintr>=3.0"
-    echo "Linting Python code"
-    flake8 \
-        --ignore=E501,W503 \
-        --exclude=./.nuget,./external_libs,./python-package/build \
-        . || exit -1
-    pydocstyle --convention=numpy --add-ignore=D105 --match-dir="^(?!^external_libs|test|example).*" --match="(?!^test_|setup).*\.py" . || exit -1
-    isort . --check-only || exit -1
-    mypy --ignore-missing-imports python-package/ || true
-    echo "Linting R code"
-    Rscript ${BUILD_DIRECTORY}/.ci/lint_r_code.R ${BUILD_DIRECTORY} || exit -1
-    echo "Linting C++ code"
-    cpplint --filter=-build/c++11,-build/include_subdir,-build/header_guard,-whitespace/line_length --recursive ./src ./include ./R-package ./swig ./tests || exit -1
-    cmake_files=$(find . -name CMakeLists.txt -o -path "*/cmake/*.cmake")
-    cmakelint --linelength=120 --filter=-convention/filename,-package/stdargs,-readability/wonkycase ${cmake_files} || exit -1
-    exit 0
-fi
-
-if [[ $TASK == "if-else" ]]; then
-    conda install -q -y -n $CONDA_ENV numpy
-    mkdir $BUILD_DIRECTORY/build && cd $BUILD_DIRECTORY/build && cmake .. && make lightgbm -j4 || exit -1
-    cd $BUILD_DIRECTORY/tests/cpp_tests && ../../lightgbm config=train.conf convert_model_language=cpp convert_model=../../src/boosting/gbdt_prediction.cpp && ../../lightgbm config=predict.conf output_result=origin.pred || exit -1
-    cd $BUILD_DIRECTORY/build && make lightgbm -j4 || exit -1
-    cd $BUILD_DIRECTORY/tests/cpp_tests && ../../lightgbm config=predict.conf output_result=ifelse.pred && python test.py || exit -1
-    exit 0
-fi
-
-if [[ $TASK == "swig" ]]; then
-    mkdir $BUILD_DIRECTORY/build && cd $BUILD_DIRECTORY/build
-    if [[ $OS_NAME == "macos" ]]; then
-        cmake -DUSE_SWIG=ON -DAPPLE_OUTPUT_DYLIB=ON ..
-    else
-        cmake -DUSE_SWIG=ON ..
-    fi
-    make -j4 || exit -1
-    if [[ $OS_NAME == "linux" ]] && [[ $COMPILER == "gcc" ]]; then
-        objdump -T $BUILD_DIRECTORY/lib_lightgbm.so > $BUILD_DIRECTORY/objdump.log || exit -1
-        objdump -T $BUILD_DIRECTORY/lib_lightgbm_swig.so >> $BUILD_DIRECTORY/objdump.log || exit -1
-        python $BUILD_DIRECTORY/helpers/check_dynamic_dependencies.py $BUILD_DIRECTORY/objdump.log || exit -1
-    fi
-    if [[ $PRODUCES_ARTIFACTS == "true" ]]; then
-        cp $BUILD_DIRECTORY/build/lightgbmlib.jar $BUILD_ARTIFACTSTAGINGDIRECTORY/lightgbmlib_$OS_NAME.jar
-    fi
-    exit 0
-fi
-
 # re-including python=version[build=*cpython] to ensure that conda doesn't fall back to pypy
 conda install -q -y -n $CONDA_ENV \
     cloudpickle \
@@ -137,7 +139,7 @@ conda install -q -y -n $CONDA_ENV \
     pandas \
     psutil \
     pytest \
-    "python=$PYTHON_VERSION[build=*cpython]" \
+    ${CONDA_PYTHON_REQUIREMENT} \
     python-graphviz \
     scikit-learn \
     scipy || exit -1