[CALCITE-2905] Migrate build scripts to Gradle

In case you are lost:

./gradlew tasks # shows the list of possible tasks
./gradlew assemble # creates the archives, zips, etc

The results of the tasks is produced to build/* folders
For instance, core/build/libs/...

./gradlew test # executes tests
./gradlew build # builds and executes the tests

./gradlew dependencies # shows "classpath"

.editorconfig

@@ -0,0 +1,46 @@
+root = true
+
+[*]
+trim_trailing_whitespace = true
+insert_final_newline = true
+charset = utf-8
+indent_style = space
+
+[{*.sh,gradlew}]
+end_of_line = lf
+
+[{*.bat,*.cmd}]
+end_of_line = crlf
+
+[{*.kts,*.kt}]
+ij_kotlin_code_style_defaults = KOTLIN_OFFICIAL
+ij_kotlin_name_count_to_use_star_import = 99
+ij_kotlin_name_count_to_use_star_import_for_members = 99
+ij_java_use_single_class_imports = true
+max_line_length = 100
+ij_any_wrap_long_lines = true
+
+[*.java]
+# Doc: https://youtrack.jetbrains.com/issue/IDEA-170643#focus=streamItem-27-3708697.0-0
+# $ means "static"
+ij_java_imports_layout = org.apache.calcite.**,|,org.apache.**,|,au.com.**,|,com.**,|,io.**,|,mondrian.**,|,net.**,|,org.**,|,scala.**,|,java.**,javax.**,|,*,|,$com.**,|,$org.apache.calcite.**,|,$org.apache.**,|,$org.**,|,$java,|,$*
+indent_size = 2
+tab_width = 2
+max_line_length = 100
+ij_any_spaces_around_additive_operators = true
+ij_any_spaces_around_assignment_operators = true
+ij_any_spaces_around_bitwise_operators = true
+ij_any_spaces_around_equality_operators = true
+ij_any_spaces_around_lambda_arrow = true
+ij_any_spaces_around_logical_operators = true
+ij_any_spaces_around_multiplicative_operators = true
+ij_any_spaces_around_relational_operators = true
+ij_any_spaces_around_shift_operators = true
+ij_continuation_indent_size = 4
+ij_java_if_brace_force = always
+ij_java_indent_case_from_switch = false
+ij_java_space_after_colon = true
+ij_java_space_before_colon = true
+ij_java_ternary_operation_signs_on_next_line = true
+ij_java_use_single_class_imports = true
+ij_java_wrap_long_lines = true

.github/workflows/main.yml

@@ -0,0 +1,64 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+    branches:
+      - '*'
+
+# https://help.github.com/en/actions/automating-your-workflow-with-github-actions/software-installed-on-github-hosted-runners
+
+jobs:
+  windows:
+    name: 'Windows (JDK 11)'
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@master
+      with:
+        fetch-depth: 50
+    - name: 'Set up JDK 11'
+      uses: actions/setup-java@v1
+      with:
+        java-version: 11
+    - name: 'Test'
+      shell: cmd
+      run: |
+        ./gradlew --no-parallel --no-daemon build javadoc
+
+  linux-avatica:
+    name: 'Linux (JDK 13), Avatica master'
+    runs-on: ubuntu-latest
+    steps:
+    - name: 'Set up JDK 13'
+      uses: actions/setup-java@v1
+      with:
+        java-version: 13
+    - name: 'Install Avatica to Maven Local repository'
+      run: |
+        git clone --branch master --depth 100 https://github.com/apache/calcite-avatica.git ../calcite-avatica
+        cd ../calcite-avatica
+        ./gradlew publishToMavenLocal -Pcalcite.avatica.version=1.0.0-dev-master -PskipJavadoc
+    - uses: actions/checkout@master
+      with:
+        fetch-depth: 50
+    - name: 'Test'
+      run: |
+        ./gradlew --no-parallel --no-daemon build javadoc -Pcalcite.avatica.version=1.0.0-dev-master-SNAPSHOT -PenableMavenLocal
+
+  mac:
+    name: 'macOS (JDK 13)'
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@master
+        with:
+          fetch-depth: 50
+      - name: 'Set up JDK 13'
+        uses: actions/setup-java@v1
+        with:
+          java-version: 13
+      - name: 'Test'
+        run: |
+          ./gradlew --no-parallel --no-daemon build javadoc
+

.gitignore

@@ -14,9 +14,23 @@
 # limitations under the License.
 #
 *~
-target
-.idea
+.gradle
+/target
+/*/target
+/example/*/target
+/build
+/*/build
+/example/*/build
+/buildSrc/build
+/buildSrc/subprojects/*/build
+
+# IDEA
+/out
+/*/out/
+/example/*/out
+/.idea
 *.iml
+
 settings.xml
 .classpath.txt
 .fullclasspath.txt

.ratignore

@@ -0,0 +1,47 @@
+**/.editorconfig
+**/.gitignore
+**/.gitattributes
+.github/workflows
+.ratignore
+**/META-INF/services/java.sql.Driver
+**/src/test/resources/**/*.csv
+**/src/test/resources/**/*.txt
+**/src/test/resources/bug/archers.json
+**/src/test/resources/foodmart-schema.spec
+**/src/test/resources/*.json
+**/data.txt
+**/data2.txt
+#bu ildSrc/build
+#b uildSrc/subprojects/*/build
+
+# TODO: remove when pom.xml files are removed
+src/main/config/licenses
+
+# Files generated by Jekyll
+site/_includes/anchor_links.html
+site/_includes/docs_contents.html
+site/_includes/docs_contents_mobile.html
+site/_includes/docs_option.html
+site/_includes/docs_ul.html
+site/_includes/footer.html
+site/_includes/header.html
+site/_includes/news_contents.html
+site/_includes/news_contents_mobile.html
+site/_includes/news_item.html
+site/_includes/primary-nav-items.html
+site/_includes/section_nav.html
+site/_includes/top.html
+site/_layouts/default.html
+site/_layouts/docs.html
+site/_layouts/external.html
+site/_layouts/news.html
+site/_layouts/news_item.html
+site/_layouts/page.html
+site/_sass/**
+site/css/screen.scss
+site/fonts/**
+site/js/**
+
+# Images
+site/img/*.png
+site/favicon.ico

.travis.yml

@@ -20,40 +20,32 @@ language: java
 matrix:
   fast_finish: true
   include:
-    - env: IMAGE=maven:3-jdk-13
-    - env: IMAGE=maven:3-jdk-12
-    - env: IMAGE=maven:3-jdk-11 JDOC=Y RAT=Y
-    - env: IMAGE=maven:3-jdk-10 SLOW_TESTS=Y
-    - env: IMAGE=maven:3-jdk-9
-    - env: IMAGE=maven:3-jdk-8 JDOC=Y
+    - jdk: openjdk8
+    - jdk: openjdk11
+    - jdk: openjdk11
+      env:
+        - SLOW_TESTS=Y
 branches:
   only:
     - master
     - new-master
     - javadoc
     - /^branch-.*$/
     - /^[0-9]+-.*$/
-env:
-  global:
-  - DOCKERRUN="docker run -it --rm -v $PWD:/src -v $HOME/.m2:/root/.m2 -w /src"
-services:
-  - docker
-before_install:
-  - docker pull $IMAGE
-install:
-  # Print the Maven version, skip tests and javadoc
-  - $DOCKERRUN $IMAGE mvn install -DskipTests=true -Dmaven.javadoc.skip=true -Djavax.net.ssl.trustStorePassword=changeit -B -V
+install: true
 script:
   # Print surefire output to the console instead of files
-  - unset _JAVA_OPTIONS
-  - if [ $JDOC = "Y" ]; then export JDOC=javadoc:javadoc; fi
-  - if [ $RAT = "Y" ]; then export RAT="apache-rat:check -Drat.consoleOutput"; fi
-  - if [ $SLOW_TESTS = "Y" ]; then export TESTS="-Dgroups=org.apache.calcite.test.SlowTests --projects :calcite-core"; else export TESTS=-DskipSlowTests; fi
-  - $DOCKERRUN $IMAGE mvn -Dcheckstyle.skip -Dsurefire.useFile=false -Dsurefire.threadCount=1 -Dsurefire.perCoreThreadCount=false -Djavax.net.ssl.trustStorePassword=changeit test $TESTS $JDOC $RAT
+  - if [ $SLOW_TESTS = "Y" ]; then export TEST_TAGS=-PincludeTestTags=org.apache.calcite.test.SlowTests; fi
+  - ./gradlew --no-daemon build $TEST_TAGS
 git:
-  depth: 10000
-sudo: required
+  depth: 100
 cache:
   directories:
-    - $HOME/.m2
+    - $HOME/.gradle/caches/
+    - $HOME/.gradle/wrapper/
+
+before_cache:
+  - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
+  - rm -fr $HOME/.gradle/caches/*/plugin-resolution/
+
 # End .travis.yml

README.md

@@ -17,6 +17,7 @@ limitations under the License.
 {% endcomment %}
 -->
 [![Travis Build Status](https://travis-ci.org/apache/calcite.svg?branch=master)](https://travis-ci.org/apache/calcite)
+[![CI Status](https://github.com/apache/calcite/workflows/CI/badge.svg)](https://github.com/apache/calcite/actions)
 [![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/github/apache/calcite?svg=true&branch=master)](https://ci.appveyor.com/project/ApacheSoftwareFoundation/calcite)
 
 # Apache Calcite

babel/build.gradle.kts

@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+plugins {
+    kotlin("jvm")
+    id("com.github.vlsi.ide")
+    calcite.fmpp
+    calcite.javacc
+}
+
+dependencies {
+    api(project(":core"))
+
+    implementation("com.google.guava:guava")
+    implementation("org.apache.calcite.avatica:avatica-core")
+    implementation("org.slf4j:slf4j-api")
+
+    testImplementation("net.hydromatic:quidem")
+    testImplementation("net.hydromatic:scott-data-hsqldb")
+    testImplementation("org.hsqldb:hsqldb")
+    testImplementation("org.incava:java-diff")
+    testImplementation("org.slf4j:slf4j-log4j12")
+    testImplementation(project(":core", "testClasses"))
+}
+
+val fmppMain by tasks.registering(org.apache.calcite.buildtools.fmpp.FmppTask::class) {
+    inputs.dir("src/main/codegen")
+    config.set(file("src/main/codegen/config.fmpp"))
+    templates.set(file("$rootDir/core/src/main/codegen/templates"))
+}
+
+val javaCCMain by tasks.registering(org.apache.calcite.buildtools.javacc.JavaCCTask::class) {
+    dependsOn(fmppMain)
+    lookAhead.set(2)
+    val parserFile = fmppMain.map {
+        it.output.asFileTree.matching { include("**/Parser.jj") }.singleFile
+    }
+    inputFile.set(parserFile)
+    packageName.set("org.apache.calcite.sql.parser.babel")
+}
+
+ide {
+    fun generatedSource(javacc: TaskProvider<org.apache.calcite.buildtools.javacc.JavaCCTask>, sourceSet: String) =
+        generatedJavaSources(javacc.get(), javacc.get().output.get().asFile, sourceSets.named(sourceSet))
+
+    generatedSource(javaCCMain, "main")
+}