feat: implement primary features and challenges

------------
# Locales
- **[zh-cn]** 实现主要功能

.editorconfig

@@ -0,0 +1,24 @@
+[*]
+charset = utf-8
+end_of_line = crlf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+max_line_length = 180
+tab_width = 4
+
+[{*.sh, mvnw, gradlew}]
+end_of_line = lf
+
+[{*.yml, *.yaml}]
+indent_size = 2
+
+[*.xml]
+indent_size = 2
+
+[*.json]
+indent_size = 2
+
+[*.md.mustache]
+indent_size = 0
+insert_final_newline = false

.gitattributes

@@ -0,0 +1,4 @@
+*.sh            text eol=lf
+gradlew         text eol=lf
+mvnw            text eol=lf
+secret.txt      text eol=lf

.github/workflows/publish.yml

@@ -0,0 +1,144 @@
+name: rsql-querydsl
+
+on: [push, pull_request]
+
+env:
+  OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+  OSSRH_TOKEN: ${{ secrets.OSSRH_TOKEN }}
+  OSSRH_GPG_SECRET_ID: ${{ secrets.OSSRH_GPG_SECRET_ID }}
+  OSSRH_GPG_SECRET_PASSWORD: ${{ secrets.OSSRH_GPG_SECRET_PASSWORD }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    if: startsWith(github.event.head_commit.message, 'bumped version to ') != true
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+
+    - name: Cache dependencies
+      uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+        restore-keys: ${{ runner.os }}-gradle-
+
+    - name: Prepare to build
+      run: chmod +x ./gradlew
+
+    - name: Build project
+      run: ./gradlew build -x test
+
+  test:
+    needs: [build]
+    runs-on: ubuntu-latest
+
+    if: startsWith(github.event.head_commit.message, 'bumped version to ') != true
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+
+    - name: Cache dependencies
+      uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+        restore-keys: ${{ runner.os }}-gradle-
+
+    - name: Prepare to build
+      run: chmod +x ./gradlew
+
+    - name: Run tests
+      run: ./gradlew check test -S
+
+  deploy_snapshot:
+    needs: [build, test]
+    runs-on: ubuntu-latest
+
+    if: (github.ref == 'refs/heads/master') && startsWith(github.event.head_commit.message, 'bumped version to ') != true && startsWith(github.event.head_commit.message, 'release:') != true
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+
+    - name: Cache dependencies
+      uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+        restore-keys: ${{ runner.os }}-gradle-
+
+    - name: Prepare to build
+      run: chmod +x ./gradlew
+
+    - id: install-secret-key
+      name: Install gpg secret key
+      run: echo "${{ secrets.OSSRH_GPG_SECRET_KEY }}" | base64 -d > ./secret.gpg
+
+    - id: publish
+      name: Publish snapshot
+      run: |
+        newVersion=`./gradlew derive --preRelease='SNAPSHOT' -i | grep 'NEXT_VERSION:==' | sed 's/^.*NEXT_VERSION:==//g'`
+
+        echo "newVersion: ${newVersion}"
+        echo "::set-output name=newVersion::${newVersion}"
+        echo "::set-output name=newVersion::${newVersion}"
+
+        ./gradlew setNewVersion -P newVersion=${newVersion} 1>/dev/null 2>/dev/null
+        ./gradlew clean publish -x test -P OSSRH_GPG_SECRET_KEY=./secret.gpg
+
+        rm -rf ./secret.gpg
+
+    - name: Generate and push CHANGELOG.md
+      run: |
+        ./gradlew changelog --toRef=master
+
+        gitCommit="bumped version to ${{ steps.publish.outputs.newVersion }}"
+
+        git config --global user.name 'ymind'
+        git config --global user.email '[email protected]'
+        git add ./CHANGELOG* || true
+        git add ./build.gradle.kts || true
+        git commit -m "${gitCommit}" && git push origin || true
+
+  deploy_release:
+    needs: [build, test]
+    runs-on: ubuntu-latest
+
+    if: startsWith(github.ref, 'refs/tags/') && startsWith(github.event.head_commit.message, 'release')
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+
+    - name: Cache dependencies
+      uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+        restore-keys: ${{ runner.os }}-gradle-
+
+    - name: Prepare to build
+      run: chmod +x ./gradlew
+
+    - id: install-secret-key
+      name: Install gpg secret key
+      run: echo "${{ secrets.OSSRH_GPG_SECRET_KEY }}" | base64 -d > ./secret.gpg
+
+    - name: Publish release
+      run: ./gradlew clean publish -x test -P OSSRH_GPG_SECRET_KEY=./secret.gpg

.gitignore

@@ -0,0 +1,43 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+/gradle.properties
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+
+### VS Code ###
+.vscode/
+
+### PROJECT ###
+logs/
+pom.xml.versionsBackup
+
+### CUSTOM CONFIG ###
+.gradle
+.okhttpcache
+secret.gpg
+secret.gpg.txt
+secret.txt

README.md

@@ -1,2 +1,21 @@
+![rsql-querydsl](https://github.com/ymind/rsql-querydsl/workflows/rsql-querydsl/badge.svg?branch=master)
+[![GitHub release (latest by date)](https://img.shields.io/github/v/release/ymind/rsql-querydsl)](https://github.com/ymind/rsql-querydsl/releases)
+[![Maven Central](https://img.shields.io/maven-central/v/team.yi.rsql/rsql-querydsl)](https://search.maven.org/artifact/team.yi.rsql/rsql-querydsl)
+[![Semantic Versioning 2.0.0](https://img.shields.io/badge/Semantic%20Versioning-2.0.0-brightgreen)](https://semver.org/)
+[![Conventional Commits](https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg)](https://conventionalcommits.org)
+[![GitHub](https://img.shields.io/github/license/ymind/rsql-querydsl)](https://github.com/ymind/rsql-querydsl/blob/master/LICENSE)
+
 # rsql-querydsl
+
 Integration RSQL query language and Querydsl framework.
+
+# Author
+
+[@ymind][6], full stack engineer.
+
+# License
+
+This is open-sourced software licensed under the [MIT license][9].
+
+[6]: https://github.com/ymind
+[9]: https://opensource.org/licenses/MIT