Dev section
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---
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title: Contribute
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description: Find out how to help translate or build the app and parsers.
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---
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# Contribute
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Find out how to help translate or build the app and parsers.
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## Code
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Know how to code and want to improve something or you generally want to support the creation of the app?
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[](https://github.com/KotatsuApp/Kotatsu)
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[](https://github.com/KotatsuApp/kotatsu-parsers)
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[](https://github.com/KotatsuApp/website)
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## Translation
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Want to help translate the app to your language? You can easily help by utilizing a service we use called **Weblate**.
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### Helpful links
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* [Translators guide](https://docs.weblate.org/en/latest/user/translating.html)
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* [Secondary languages](https://docs.weblate.org/en/latest/user/profile.html#secondary-languages)
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* [Subscriptions](https://docs.weblate.org/en/latest/user/profile.html#subscriptions)
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* [Glossary](https://docs.weblate.org/en/latest/user/translating.html#glossary)
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---
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title: Contribute
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description: Find out how to help translate or build the app and parsers.
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---
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# Contribute
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Find out how to help translate or build the app and parsers.
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## App contribution guidelines
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- If you want to fix bug or implement a new feature, that already mention in the [issues](https://github.com/KotatsuApp/Kotatsu/issues), please, assign this issue to you and/or comment about it.
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- Whether you have to implement new feature, please, open an issue or discussion regarding it to ensure it will be accepted.
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- Translations have to be managed using the [Weblate](https://hosted.weblate.org/engage/kotatsu/) platform.
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- In case you want to add a new manga source, refer to the [parsers repository](https://github.com/KotatsuApp/kotatsu-parsers).
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Refactoring or some dev-faces improvements are also might be accepted, however please stick to the following principles:
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- Performance matters. In the case of choosing between source code beauty and performance, performance should be a priority.
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- Please, do not modify readme and other information files (except for typos).
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- Avoid adding new dependencies unless required. APK size is important.
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## Parsers contribution guidelines
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The following is guide for creating a Kotatsu parsers. Thanks for taking the time to contribute!
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### Prerequisites
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Before you start, please note that the ability to use following technologies is **required**.
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- Basic [Android development](https://developer.android.com/)
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- [Kotlin](https://kotlinlang.org/)
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- Web scraping ([JSoup](https://jsoup.org/)) or JSON API
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#### Tools
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- [Android Studio](https://developer.android.com/studio)
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- [IntelliJ IDEA](https://www.jetbrains.com/idea/) (Community edition is enough)
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- Android device (or emulator)
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Kotatsu parsers is not a part of Android application, but you can easily develop and test it directly inside an Android
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application project and relocate it to the library project when done.
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#### Before you start
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First, take a look at `kotatsu-parsers` project structure. Each parser is a single class that
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extends `MangaParser` class and have a `MangaSourceParser` annotation.
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Also pay attention on extensions in `util` package. For example, extensions from `Jsoup` file
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should be used instead of existing JSoup functions because they have better nullability support
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and improved error messages.
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### Writing your parser
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So, you want to create a parser, that will provide access to manga from a website.
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First, you should explore a website for API availability.
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If it does not contain any documentation about
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API, [explore network requests](https://firefox-source-docs.mozilla.org/devtools-user/):
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some websites use ajax.
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- [Example](https://github.com/KotatsuApp/kotatsu-parsers/blob/master/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/DesuMeParser.kt)
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of Json API usage.
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- [Example](https://github.com/KotatsuApp/kotatsu-parsers/blob/master/src/main/kotlin/org/koitharu/kotatsu/parsers/site/be/AnibelParser.kt)
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of GraphQL API usage
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- [Example](https://github.com/KotatsuApp/kotatsu-parsers/blob/master/src/main/kotlin/org/koitharu/kotatsu/parsers/site/en/MangaTownParser.kt)
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of pure HTML parsing.
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If website is based on some engine it is rationally to use common base class for this one (for example, Madara wordress
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theme
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and the `MadaraParser` class)
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#### Parser class skeleton
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Parser class must have exactly one primary constructor parameter of type `MangaLoaderContext` and have an
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`MangaSourceParser` annotation that provides internal name, title and language of a manga source.
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All functions in `MangaParser` class are documented. Pay attention to some peculiarities:
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- Never hardcode domain. Specify default domain in `configKeyDomain` field and obtain an actual one using `getDomain()`.
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- All ids must be unique and domain-independent. Use `generateUid` functions with relative url or some internal id which
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is unique across the manga source.
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- `sortOrders` set should not be empty. If your source is not support sorting, specify one most relevance value.
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- If you cannot obtain direct links to pages images inside `getPages` method, it is ok to use an intermediate url
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as `Page.url` and fetch a direct link at `getPageUrl` function.
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- You can use _asserts_ to check some optional fields. For example. `Manga.author` field is not required, but if your
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source provide such information, add `assert(it != null)`. This will not have any effect on production but help to
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find issues during unit testing.
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- If your source website (or it's api) uses pages for pagination instead of offset you should extend `PagedMangaParser`
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instead of `MangaParser`.
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- Your parser may also implement the `Interceptor` interface for additional manipulation of all network requests and/or
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responses, including image loading.
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### Development process
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During the development it is recommended (but not necessary) to write it directly
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in the Kotatsu android application project. You can use `core.parser.DummyParser` class as a sandbox. `Dummy` manga
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source is available in debug Kotatsu build.
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Once parser is ready you can relocate your code into `kotatsu-parsers` library project in a `site` package and create a
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Pull Request.
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#### Testing
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It is recommended to run unit tests before submitting a PR.
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- Temporary modify the `MangaSources` annotation class: specify your parser(s) name(s) and change mode to `EnumSource.Mode.INCLUDE`
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- Run the `MangaParserTest`
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```bash
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gradlew :test --tests "org.koitharu.kotatsu.parsers.MangaParserTest"
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```
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- Optionally, you can run the `generateTestsReport` gradle task to get a pretty readable html report from test results.
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### Help
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If you need a help or have some questions, ask a community in our [Telegram chat](https://t.me/kotatsuapp)
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or [Discord server](https://discord.gg/NNJ5RgVBC5).
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@ -0,0 +1,59 @@
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---
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title: Parsers library
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description: Instructions for using the Kotatsu parser library.
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---
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# Kotatsu parsers
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This library provides manga sources.
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## Usage
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Add it to your root `build.gradle` at the end of repositories:
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```groovy{4}
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allprojects {
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repositories {
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...
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maven { url 'https://jitpack.io' } // [!code focus]
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}
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}
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```
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Add the dependency
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:::tip For Java/Kotlin project:
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```groovy
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dependencies {
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implementation("com.github.KotatsuApp:kotatsu-parsers:$parsers_version")
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}
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```
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:::
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:::tip For Android project:
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```groovy
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dependencies {
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implementation("com.github.KotatsuApp:kotatsu-parsers:$parsers_version") {
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exclude group: 'org.json', module: 'json'
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}
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}
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```
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:::
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Versions are available on [JitPack](https://jitpack.io/#KotatsuApp/kotatsu-parsers)
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:::tip Usage in code
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```kotlin
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val parser = mangaLoaderContext.newParserInstance(MangaSource.MANGADEX)
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```
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:::
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`mangaLoaderContext` is an implementation of the `MangaLoaderContext` class.
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See examples
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of [Android](https://github.com/KotatsuApp/Kotatsu/blob/devel/app/src/main/java/org/koitharu/kotatsu/core/parser/MangaLoaderContextImpl.kt)
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and [Non-Android](https://github.com/KotatsuApp/kotatsu-dl/blob/master/src/main/kotlin/org/koitharu/kotatsu_dl/env/MangaLoaderContextImpl.kt) implementation.
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Note that the `MangaSource.LOCAL` and `MangaSource.DUMMY` parsers cannot be instantiated.
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## DMCA disclaimer
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The developers of this application have no affiliation with the content available in the app. It is collected from
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sources freely available through any web browser.
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@ -0,0 +1,53 @@
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---
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title: Synchronization server
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description: Instructions for installing the synchronization server.
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---
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# Synchronization server
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Instructions for installing the synchronization server.
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## Installation
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### Docker
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Build image container:
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```bash
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docker build github.com/KotatsuApp/kotatsu-syncserver.git -t kotatsuapp/syncserver
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```
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Run container:
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```bash
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docker run -d -p 8081:8080 \
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-e DATABASE_HOST=your_db_host \
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-e DATABASE_USER=your_db_user \
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-e DATABASE_PASSWORD=your_db_password \
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-e DATABASE_NAME=your_db_name \
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-e DATABASE_PORT=your_db_port \
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-e JWT_SECRET=your_secret \
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--restart always \
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--name kotatsu-sync kotatsuapp/syncserver
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```
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### Systemd
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Requirements:
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- JDK 11+
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- Gradle 7.0+
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Commands:
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```bash
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git clone https://github.com/KotatsuApp/kotatsu-syncserver.git
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cd kotatsu-syncserver && ./gradlew shadowJar
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```
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Then edit file `kotatsu-sync.service`, change `replaceme` fields with your values and specify the `kotatsu-syncserver-0.0.1.jar` file location (it can be found in `build/libs` directory after buliding)
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```bash
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cp kotatsu-sync.service /etc/systemd/system
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systemctl enable kotatsu-sync
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systemctl daemon-reload
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systemctl start kotatsu-sync
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```
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For any questions, please, contact us in [Telegram group](https://t.me/kotatsuapp) or write an issue, thanks.
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Reference in New Issue