Add release instruction

ci/release.md

@@ -0,0 +1,63 @@
+### Updating Skia
+
+1. Update `third_party/skia` submodule in [skija repo](https://github.com/JetBrains/skija).
+2. Ensure Skija build is not broken:
+    * Run [<skija root>/script/build.sh](https://github.com/JetBrains/skija/blob/master/script/build.sh) 
+3. If used Skia branch is changed (e.g. a switch from `chrome/m85` to `chrome/m86`), update `VER` variable value in build scripts:
+    * [script/build_skia_linux.sh](https://github.com/JetBrains/skija/blob/master/script/build_skia_linux.sh)
+    * [script/build_skia_windows.sh](https://github.com/JetBrains/skija/blob/master/script/build_skia_windows.sh) 
+    * [script/build_skia_macos.sh](https://github.com/JetBrains/skija/blob/master/script/build_skia_macos.sh)
+4. Deploy Skia to Bintray by clicking "Deploy" (or "..." to customize options) in 
+[Skia | Publish Release](https://teamcity.jetbrains.com/buildConfiguration/JetBrainsPublicProjects_Compose_Skia_PublishRelease) 
+configuration.
+5. Pin the resulting build to preserve artifacts on TeamCity too.
+6. Update Skia in Skiko:
+    * Update the following configuration parameters in 
+    [gradle.properties](https://github.com/JetBrains/skiko/blob/master/skiko/gradle.properties):
+        * `dependencies.skija.git.commit`, 
+        * `dependencies.skia.windows`, 
+        * `dependencies.skia.linux`, 
+        * `dependencies.skia.windows`. 
+    * Ensure build is not broken by running `./gradlew publishToMavenLocal` in `<skiko_root>/skiko`:
+    * To further ensure, that Skiko builds on all platforms, consider running a new build in 
+        [Build Check configuration](https://teamcity.jetbrains.com/buildConfiguration/JetBrainsPublicProjects_Compose_Skiko_BuildCheckManualTrigger):
+        * click "...",
+        * EITHER choose a branch/commit on "Changes" tab, 
+        * OR upload a custom patch by checking "run as a personal build" on "General" tab.     
+            
+### Releasing Skiko
+
+1. Check, that the release is ready:
+    * Ask teammates if all the necessary changes are published;
+    * Determine a git commit for a release;
+    * Check, that [sample projects](https://github.com/JetBrains/skiko/tree/master/samples) work:
+        * E.g. `cd skiko && ./gradlew publishToMavenLocal && cd samples/SkijaInjectSample && ./gradlew run`;
+        * Ask teammates for help with testing on platforms you don't have access to.
+2. Deploy Skiko to Space by clicking "Deploy" in [Publish Release configuration](https://teamcity.jetbrains.com/buildConfiguration/JetBrainsPublicProjects_Compose_Skiko_PublishRelease):
+    * Set "Skiko Release Version" on "Parameters" tab to a *new release version*;
+    * Choose a branch/commit on "Changes" tab;
+    * (Tip) If you're in a hurry, consider checking "put the build to the queue top" on "General" tab.
+3. [Create a release on GitHub](https://github.com/JetBrains/skiko/releases/new)
+    * Use `v<RELEASE_VERSION>` pattern for the tag version (e.g. `v0.1.6`)
+    * Attach artifacts from the finished build in 
+    [Publish Release](https://teamcity.jetbrains.com/buildConfiguration/JetBrainsPublicProjects_Compose_Skiko_PublishRelease) 
+    configuration.
+
+### Updating Skiko in Compose
+
+1. Use `<androidx-dev-master>/frameworks/support/development/importMaven/import_maven_artifacts.py` script 
+to download maven artifacts:
+    ```
+    # you may need to add `maven("https://packages.jetbrains.team/maven/p/ui/dev")` 
+    # the repository section of corresponding build.gradle.kts
+    export SKIKO_VERSION="0.1.6"
+    import_maven_artifacts.py --name "org.jetbrains.skiko:skiko-jvm:$SKIKO_VERSION"
+    import_maven_artifacts.py --name "org.jetbrains.skiko:skiko-jvm-runtime-linux:$SKIKO_VERSION"
+    import_maven_artifacts.py --name "org.jetbrains.skiko:skiko-jvm-runtime-windows:$SKIKO_VERSION"
+    import_maven_artifacts.py --name "org.jetbrains.skiko:skiko-jvm-runtime-macos:$SKIKO_VERSION"
+    ```
+2. Commit changes to `<androidx-dev-master>/prebuilts/androidx/external` repository & upload a CL. 
+
+### Publishing Compose Desktop
+
+Run a new build in [Compose configuration](https://teamcity.jetbrains.com/buildConfiguration/JetBrainsPublicProjects_Skija_JetpackComposeMpp_Dev)