[Docs] Refine the API reference generation process for libraries

.github/workflows/ci-nightly.yml

@@ -28,7 +28,7 @@ jobs:
     if: ${{ github.ref == 'refs/heads/main' && github.repository == 'apache/incubator-graphar' }}
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
           submodules: true
 

.github/workflows/ci.yml

@@ -40,6 +40,8 @@ concurrency:
 jobs:
   GraphAr-ubuntu-arrow-installed:
     runs-on: ubuntu-latest
+    env:
+      GAR_TEST_DATA: ${{ github.workspace }}/testing/
     steps:
     - uses: actions/checkout@v3
       with:
@@ -57,7 +59,7 @@ jobs:
                             libarrow-dataset-dev=14.0.1-1 \
                             libarrow-acero-dev=14.0.1-1 \
                             libparquet-dev=14.0.1-1
-        sudo apt-get install -y libboost-graph-dev ccache libcurl4-openssl-dev
+        sudo apt-get install -y libboost-graph-dev ccache libcurl4-openssl-dev doxygen
 
         # install benchmark
         git clone --branch v1.8.3 https://github.com/google/benchmark.git --depth 1
@@ -67,20 +69,19 @@ jobs:
         popd
 
     - name: CMake
+      working-directory: "cpp"
       run: |
         mkdir build
-        pushd build
-        cmake ../cpp -DCMAKE_BUILD_TYPE=Debug -DBUILD_TESTS=ON -DBUILD_EXAMPLES=ON -DBUILD_BENCHMARKS=ON
-        popd
+        cd build
+        cmake .. -DCMAKE_BUILD_TYPE=Debug -DBUILD_TESTS=ON -DBUILD_EXAMPLES=ON -DBUILD_BENCHMARKS=ON
 
     - name: Cpp Format and lint
+      working-directory: "cpp/build"
       run: |
         # install clang-format
         sudo curl -L https://github.com/muttleyxd/clang-tools-static-binaries/releases/download/master-22538c65/clang-format-8_linux-amd64 --output /usr/bin/clang-format
         sudo chmod +x /usr/bin/clang-format
 
-        pushd build
-
         # validate format
         function prepend() { while read line; do echo "${1}${line}"; done; }
 
@@ -120,29 +121,27 @@ jobs:
             exit -1
         fi
 
-        popd
+    - name: Build Docs
+      working-directory: "cpp/build"
+      run: |
+        cmake -DENABLE_DOCS=ON ..
+        make docs
 
     - name: Build GraphAr
-      run: |
-        pushd build
-        make -j$(nproc)
-        popd
+      working-directory: "cpp/build"
+      run: make -j$(nproc)
 
     - name: Test
+      working-directory: "cpp/build"
       run: |
-        pushd build
         export ASAN_OPTIONS=detect_leaks=0
-        export GAR_TEST_DATA=$PWD/../testing/
-        make test
-        popd
+        ctest --output-on-failure
 
     - name: Benchmark
+      working-directory: "cpp/build"
       run: |
-        pushd build
-        export GAR_TEST_DATA=$PWD/../testing/
         ./graph_info_benchmark
         ./arrow_chunk_reader_benchmark
-        popd
 
   GraphAr-centos-arrow-installed:
     runs-on: ubuntu-latest
@@ -178,9 +177,10 @@ jobs:
 
     - name: Build GraphAr
       shell: scl enable devtoolset-8 -- bash --noprofile --norc -eo pipefail {0}
+      working-directory: "cpp"
       run: |
         mkdir build
         pushd build
-        cmake ../cpp
+        cmake ..
         make -j$(nproc)
         popd

.github/workflows/docs.yml

@@ -21,15 +21,14 @@ on:
   push:
     branches:
       - main
+    paths:
+      - 'docs/**'
+      - '.github/workflows/docs.yml'
   pull_request:
     branches:
       - main
     paths:
       - 'docs/**'
-      - 'cpp/**'
-      - 'java/**'
-      - 'spark/**'
-      - 'pyspark/**'
       - '.github/workflows/docs.yml'
 
 concurrency:

.github/workflows/java.yml

@@ -38,10 +38,10 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  GraphAr-java:
+  test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
 
@@ -61,18 +61,22 @@ jobs:
           sudo apt-get install llvm-11 clang-11 lld-11 libclang-11-dev libz-dev -y
 
       - name: Code Format Check
+        working-directory: java
         run: |
           export JAVA_HOME=${JAVA_HOME_11_X64}
-          pushd java 
           mvn spotless:check
-          popd
+
+      - name: Build Java Docs
+        working-directory: java
+        run: |
+          export JAVA_HOME=${JAVA_HOME_11_X64}
+          mvn javadoc:javadoc
 
       - name: Run test
+        working-directory: java
         run: |
           # Temporarily using Java 8, related issue: https://github.com/apache/incubator-graphar/issues/277
           export JAVA_HOME=${JAVA_HOME_8_X64}
           export LLVM11_HOME=/usr/lib/llvm-11
-          pushd java
           export GAR_TEST_DATA=$PWD/../testing/
           mvn clean test -Dspotless.check.skip=true
-          popd

.github/workflows/pyspark.yml

@@ -40,10 +40,10 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  GraphAr-spark:
+  test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
           submodules: true
 
@@ -53,24 +53,27 @@ jobs:
         python-version: 3.9
 
     - name: Install Poetry
+      working-directory: pyspark
       run: |
         yes | sudo python3 -m pip install poetry --quiet
-        cd pyspark
         poetry env use python3
 
-    - name: Install Spark Scala && PySpark
-      run: |
-        cd pyspark
-        make install_test
-
-    - name: Run PyTest
-      run: |
-        cd pyspark
-        make test
-
     - name: Lint
+      working-directory: pyspark
       run: |
-        cd pyspark
         make install_lint
         make lint
+
+    - name: Build Docs
+      working-directory: pyspark
+      run: |
+        make install_docs
+        make docs
 
+    - name: Install Spark Scala && PySpark
+      working-directory: pyspark
+      run: make install_test
+
+    - name: Run PyTest
+      working-directory: pyspark
+      run: make test

.github/workflows/spark.yaml

@@ -38,7 +38,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  GraphAr-spark:
+  test:
     runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
@@ -52,38 +52,44 @@ jobs:
             spark-hadoop: "spark-3.3.4-bin-hadoop3"
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
           submodules: true
 
     - name: Code Format Check
+      working-directory: spark
       run: |
         export JAVA_HOME=${JAVA_HOME_11_X64}
-        pushd spark
         mvn --no-transfer-progress spotless:check
-        popd
 
     - name: Build GraphAr Spark
+      working-directory: spark
       run: |
         export JAVA_HOME=${JAVA_HOME_11_X64}
-        pushd spark
         echo "Build ${{ matrix.mvn-profile }}"
-        mvn --no-transfer-progress clean package -DskipTests -Dspotless.check.skip=true -P ${{ matrix.mvn-profile }}
-        popd
+        mvn clean package -DskipTests -Dspotless.check.skip=true -P ${{ matrix.mvn-profile }}
+
+    - name: Build Spark Docs
+      working-directory: spark
+      run: |
+        export JAVA_HOME=${JAVA_HOME_11_X64}
+        echo "Build ${{ matrix.mvn-profile }}"
+        # FIXME: the install is not necessary, but it is a workaround for the issue
+        mvn install --no-transfer-progress -DskipTests -Dspotless.check.skip=true
+        mvn scala:doc
 
     - name: Run test
+      working-directory: spark
       run: |
         export JAVA_HOME=${JAVA_HOME_11_X64}
         export SPARK_TESTING=1
-        pushd spark
         echo "Test ${{ matrix.mvn-profile }}"
-        mvn --no-transfer-progress test -Dspotless.check.skip=true -P ${{ matrix.mvn-profile }}
-        popd
+        mvn test --no-transfer-progress -Dspotless.check.skip=true -P ${{ matrix.mvn-profile }}
 
     - name: Run Neo4j2GraphAr example
+      working-directory: spark
       run: |
         export JAVA_HOME=${JAVA_HOME_11_X64}
-        pushd spark
         scripts/get-spark-to-home.sh ${{ matrix.spark }} ${{ matrix.spark-hadoop }}
         export SPARK_HOME="${HOME}/${{ matrix.spark-hadoop }}"
         export PATH="${SPARK_HOME}/bin":"${PATH}"
@@ -105,13 +111,10 @@ jobs:
         echo "match (a) -[r] -> () delete a, r;match (a) delete a;" | cypher-shell -u ${NEO4J_USR} -p ${NEO4J_PWD} -d neo4j --format plain
         scripts/run-graphar2neo4j.sh
 
-        # stop and clean
-        popd
-
     - name: Run Nebula2GraphAr example
+      working-directory: spark
       run: |
         export JAVA_HOME=${JAVA_HOME_11_X64}
-        pushd spark
         scripts/get-nebula-to-home.sh
         export SPARK_HOME="${HOME}/${{ matrix.spark-hadoop }}"
         export PATH="${SPARK_HOME}/bin":"${PATH}"
@@ -134,13 +137,10 @@ jobs:
         # import from GraphAr
         scripts/run-graphar2nebula.sh
 
-        # stop and clean
-        popd
-
     - name: Run Neo4j importer
+      working-directory: spark
       run: |
         export JAVA_HOME=${JAVA_HOME_11_X64}
-        pushd spark
         export SPARK_HOME="${HOME}/${{ matrix.spark-hadoop }}"
         export PATH="${SPARK_HOME}/bin":"${PATH}"
 
@@ -149,6 +149,3 @@ jobs:
         # run the importer
         cd import
         ./neo4j.sh neo4j.json
-
-        # stop and clean
-        popd

cpp/CMakeLists.txt

@@ -43,6 +43,27 @@ project(graph-archive LANGUAGES C CXX VERSION ${GAR_VERSION})
 option(BUILD_TESTS "Build unit tests" OFF)
 option(BUILD_EXAMPLES "Build examples" OFF)
 option(BUILD_BENCHMARKS "Build benchmarks" OFF)
+option(ENABLE_DOCS "Enable documentation" OFF)
+option(BUILD_DOCS_ONLY "Build docs only" OFF)
+
+if (ENABLE_DOCS OR BUILD_DOCS_ONLY)
+    set(PROJECT_DOCUMENT_SOURCE ${PROJECT_SOURCE_DIR}/include ${PROJECT_SOURCE_DIR}/README.md)
+    string(REPLACE ";" " " PROJECT_DOCUMENT_SOURCE "${PROJECT_DOCUMENT_SOURCE}")
+    file(DOWNLOAD https://cdn.jsdelivr.net/gh/jothepro/doxygen-awesome-css@2.2.1/doxygen-awesome.min.css ${CMAKE_BINARY_DIR}/doxygen-awesome.css)
+    find_package(Doxygen REQUIRED)
+    set(DOXYGEN_IN ${PROJECT_SOURCE_DIR}/Doxyfile)
+    set(DOXYGEN_OUT ${CMAKE_BINARY_DIR}/Doxyfile.out)
+    configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)
+    add_custom_target(docs
+        COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+        COMMENT "Generating API documentation with Doxygen"
+        VERBATIM)
+
+    if (BUILD_DOCS_ONLY)
+        return()
+    endif()
+endif()
 
 # ------------------------------------------------------------------------------
 # setting default cmake type to Release
@@ -451,19 +472,3 @@ add_custom_target(gar-cpplint
         COMMAND ${PROJECT_SOURCE_DIR}/misc/cpplint.py --root=${PROJECT_SOURCE_DIR}/include ${FILES_NEED_LINT}
         COMMENT "Running cpplint check."
         VERBATIM)
-
-# ------------------------------------------------------------------------------
-# build cpp api doc
-# ------------------------------------------------------------------------------
-find_program(doxygen_EXECUTABLE doxygen NO_CMAKE_SYSTEM_PATH)
-if(doxygen_EXECUTABLE)
-    add_custom_target(gar-cpp-doc
-        COMMAND ${doxygen_EXECUTABLE}
-        WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/apidoc
-        VERBATIM
-    )
-else()
-    if(NOT doxygen_EXECUTABLE)
-        message(STATUS "Cannot find the doxygen executable.")
-    endif()
-endif()