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The work is coordinated by the <a href="https://scala.epfl.ch/">Scala Center</a>.</p> 141</blockquote> 142 143<h2 id="plugin-as-an-ecosystem">Plugin as an ecosystem</h2> 144 145<p>Out of the box, sbt handles basic functionality like building and testing Scala code. Once you get used to the basics, the build can be extended further by using community plugins. Plugins range from simple utilities to support for new programming languages.</p> 146 147<p>One aspect of a plugin project is that it can be created and developed without waiting for a release of sbt, so itâs a great way to try new ideas or collaborate across the community. If you want to discover plugins two sources are:</p> 148 149<ul> 150 <li><strong><a href="https://www.scala-sbt.org/2.x/docs/en/community-plugins.html">Community Plugins</a></strong> page</li> 151 <li><strong><a href="https://index.scala-lang.org/search?platform=sbt2">Scaladex</a></strong></li> 152</ul> 153 154<h3 id="preparing-for-reforestation">Preparing for reforestation</h3> 155 156<p>Since the ecosystem is an essential element of the user experience, the health of the plugin ecosystem is always our concern. This is especially so when we release a new major version, which <em>burns the old forest</em>. All plugins need to be cross built, and re-published, like new saplings springing from the ash. There are several strategies we adopted to aid the reforestation.</p> 157 158<ul> 159 <li>Over the years, we have centralized major plugins to <a href="https://github.com/sbt">GitHub sbt</a> organization. This lets us add new maintainers to the plugin who can review the PRs.</li> 160 <li>Created the <a href="https://github.com/sbt/sbt/wiki/sbt-2.x-plugin-migration">sbt 2.x plugin migration</a> wiki page to coordinate the migration effort.</li> 161 <li>We locked down the ABI for 2.x with 2.0.0-RC1, which was released in August 2025. This gave a head start for the plugin authors to cross publish before sbt 2.0 came out.</li> 162 <li>In March 2026, Anatolii Kmetiuk (Scala Center) created <a href="/blog/2026/03/02/sbt2-compat.html">sbt2-compat plugin</a>, which adds a compatibility layer so that the same plugin can target both sbt 1 and sbt 2.</li> 163 <li>Beyond tooling, weâve actively sent pull requests to migrate the plugins.</li> 164</ul> 165 166<p>Iâm happy to report that as of this writing (September 2026), <a href="https://index.scala-lang.org/search?platform=sbt2">Scaladex</a> lists <strong>172 plugins</strong> available for sbt 2.x. Many thanks for the community effort by volunteers like Kenji Yoshida and many others.</p> 167 168<p>In this post, Iâd like to highlight some of the most notable plugin updates.</p> 169 170<h2 id="plugin-updates">Plugin updates</h2> 171 172<h3 id="scalajs-1220">Scala.js 1.22.0</h3> 173 174<p><a href="https://www.scala-js.org/news/2026/06/20/announcing-scalajs-1.22.0/">Scala.js 1.22.0</a> shipped with sbt 2.x support. Rikito Taniguchi (VirtusLab) sent <a href="https://github.com/scala-js/scala-js/pull/5314">scala-js#5314</a> on behalf of the sbt project to port the plugin to sbt 2.x.</p> 175 176<p><strong>Side note</strong>: A test included in the pull request mentions the fact that in sbt 2.x <code class="language-plaintext highlighter-rouge">%%%</code> operator is no longer needed, which is nice:</p> 177 178<div class="language-scala highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1">// In sbt 2, %% resolves to the Scala.js artifact (scalajs-dom_sjs1_3)</span> 179<span class="c1">// for Scala.js projects. This replaces the %%% operator from sbt 1.</span> 180<span class="n">libraryDependencies</span> <span class="o">+=</span> <span class="s">"org.scala-js"</span> <span class="o">%%</span> <span class="s">"scalajs-dom"</span> <span class="o">%</span> <span class="s">"2.8.0"</span> 181</code></pre></div></div> 182 183<h3 id="sbt-matrix-sources-010">sbt-matrix-sources 0.1.0</h3> 184 185<p>Thereâs a new plugin for sbt 2.x called <a href="https://github.com/sbt/sbt-matrix-sources">sbt-matrix-sources</a>, created by <a href="https://github.com/kitbellew">Albert Meltzer</a>. This plugin adds <code class="language-plaintext highlighter-rouge"><platform_part>/src/main/<language_part></code> to the source directory like <code class="language-plaintext highlighter-rouge">js/src/main/scala</code>. This provide an sbt-crossproject emulation on top of the project matrix to smooth out the sbt 2.x migration.</p> 186 187<h3 id="sbt-git-300-rc1">sbt-git 3.0.0-RC1</h3> 188 189<p><a href="https://github.com/sbt/sbt-git/releases/tag/v3.0.0-RC1">sbt-git 3.0.0-RC1</a> was published recently for sbt 1.x and 2.x. sbt-git 3.x features a shift to use system <code class="language-plaintext highlighter-rouge">git</code> by default as opposed to JGit. This was contributed by <a href="https://github.com/mkurz">Matthias Kurz</a>, from the Play framework project.</p> 190 191<h3 id="sbt-buildinfo-0132">sbt-buildinfo 0.13.2</h3> 192 193<p><a href="https://github.com/sbt/sbt-buildinfo/releases/tag/v0.13.2">sbt-buildinfo 0.13.2</a> was published recently for sbt 1.x and 2.x. sbt-buildinfo is a small code generator that I created a while back to give project code access to information in the build definition. sbt-buildinfo 0.13.2 features a bug fix contributed by <a href="https://github.com/lrytz">Lukas Rytz</a> (VirtusLab) that should avoid running the tasks out-of-graph on sbt 2.x.</p> 194 195<h3 id="sbt-github-actions-0320">sbt-github-actions 0.32.0</h3> 196 197<p><a href="https://github.com/sbt/sbt-github-actions/releases/tag/v0.32.0">sbt-github-actions 0.32.0</a> was released a few weeks ago for sbt 1.x and 2.x. sbt-github-actions generates GitHub Actions YAML files from the build. sbt-github-actions 0.32.0 features an update that I sent to use actions/setup-java v6.</p> 198 199<h3 id="sbt-assembly-250">sbt-assembly 2.5.0</h3> 200 201<p><a href="https://github.com/sbt/sbt-assembly/releases/tag/v2.5.0">sbt-assembly 2.5.0</a> was released a few weeks ago for sbt 1.x and 2.x. Recent contributions include an update to make shading errors fail the build, by <a href="https://github.com/stasimus">Stas Shevchenko</a> (Evolution), and artifact caching, by <a href="https://github.com/unkarjedy">Dmitrii Naumenko</a> (JetBrains).</p> 202 203<h3 id="sbt-salad-days-020">sbt-salad-days 0.2.0</h3> 204 205<p><a href="https://eed3si9n.com/reducing-scaladoc-file-size-with-sbt-salad-days/">sbt-salad-days</a> is a plugin I created to reduce the Scaladoc JAR size for Maven Central publishing. This is an interim solution while we wait for a fix to be merged upstream in various Scala versions.</p> 206 207<h3 id="sbt-site-180">sbt-site 1.8.0</h3> 208 209<p><a href="https://github.com/sbt/sbt-site/releases/tag/v1.8.0">sbt-site 1.8.0</a> was cross published for sbt 1.x and 2.x last month. sbt-site is an sbt plugin originally created by Josh Suereth to generate project websites. I sent <a href="https://github.com/sbt/sbt-site/pull/224">sbt-site#224</a> to cross build it.</p> 210 211<h3 id="sbt-testng-320">sbt-testng 3.2.0</h3> 212 213<p><a href="https://github.com/sbt/sbt-testng/releases/tag/v3.2.0">sbt-testng 3.2.0</a> was cross published for sbt 1.x. and 2.x recently. Iâm not sure how popular testng is, but I sent <a href="https://github.com/sbt/sbt-testng/pull/30">sbt-testng#30</a> to aid Slick migrating to sbt 2.x.</p> 214 215<h3 id="sbt-pgp-232">sbt-pgp 2.3.2</h3> 216 217<p><a href="https://github.com/sbt/sbt-pgp/releases/tag/v2.3.2">sbt-pgp 2.3.2</a> was released last month for sbt 1.x and 2.x, with a fix to ensure compatibility with sbt 2.1.0.</p> 218 219<h2 id="towards-sbt-210--scala-390-lts">Towards sbt 2.1.0 + Scala 3.9.0 LTS</h2> 220 221<p>Recently we published <a href="https://eed3si9n.com/sbt-2.1.0-beta">sbt 2.1.0-M1</a>, kicking off the beta release of sbt 2.1.x series. Among the headline feature of sbt 2.1.0 is Scala 3.9.0 LTS on the metabuild. Since both
221sbt 2.x and Scala 3.x are backward compatible, generally existing plugins should continue to work.</p> 222 223<ol> 224 <li>Since sbt 2.1.0 removes Apache Ivy as its dependency, any plugins that were using internal Ivy code should migrate to using the LM API (available since sbt 1.0), which abstracts over Ivy and Coursier.</li> 225 <li>Since Scala 3.9.x will be better supported as Long Term Support (LTS), we should adopt it once sbt 2.1.0 becomes available. Until then, plugins must stick with Scala 3.8.x.</li> 226</ol> 227 228<h2 id="participation">Participation</h2> 229 230<p>The Scala Center has been entrusted with coordinating the commissioned Scala work for the Sovereign Tech Fund. The Scala Center is an independent, not-for-profit center sponsored by <a href="/blog/2023/09/11/scala-center-fundraising.html">corporate members and individual backers like you</a> to promote and facilitate Scala. If you would like to participate and/or see more of these types of efforts, please reach out to your manager to see if your company can donate engineering time or membership to the Scala Center.</p> 231 232<p>See <a href="/blog/2023/09/11/scala-center-fundraising.html">The Scala Center Fundraising Campaign</a> for more details.</p> 233 234 </div> 235 </div> 236 <!-- TOC --> 237 238<div class="content-nav"> 239 <div class="inner-box sidebar-toc-wrapper" style=""> 240 <h5>Contents</h5> 241 <div class="inner-toc" id="sidebar-toc"> 242 243 </div> 244 <hr> 245 <div class="help-us"><a href="https://github.com/scala/scala-lang/blob/master/blog/_posts/2026-09-16-sbt-plugin-updates.md" data-proofer-ignore><i class="fa fa-pencil" aria-hidden="true"></i> Problem with this page?<br> Please help us fix it!</a></div> 246 </div> 247</div> 248 249 250 </div> 251 </div> 252</section> 253 254 255</main> 256 257<footer id="site-footer"> 258 <div class="wrap"> 259 <div class="site-footer-top"> 260 261 <ul class="documentation"> 262 <li><h3>Documentation</h3></li> 263 264 265 <li><a href="https://docs.scala-lang.org/getting-started.html">Getting Started</a></li> 266 267 268 269 <li><a href="https://www.scala-lang.org/api/current/index.html">API</a></li> 270 271 272 273 <li><a href="https://docs.scala-lang.org/overviews">Overviews/Guides</a></li> 274 275 276 277 <li><a href="https://scala-lang.org/files/archive/spec/2.13/">Language Specification</a></li> 278 279 280 </ul> 281 282 <ul class="download"> 283 <li><h3>Download</h3></li> 284 285 286 <li><a href="/download/">Current Version</a></li> 287 288 289 290 <li><a href="/download/all.html">All versions</a></li> 291 292 293 </ul> 294 295 <ul class="community"> 296 <li><h3>Community</h3></li> 297 298 299 <li><a href="/community/">Community</a></li> 300 301 302 303 <li><a href="/ambassadors/">Scala Ambassadors</a></li> 304 305 306 307 <li><a href="/community/index.html#forums">Forums</a></li> 308 309 310 311 <li><a href="/community/index.html#chat-rooms">Chat</a></li> 312 313 314 315 <li><a href="/community/index.html#libraries-and-tools">Libraries and Tools</a></li> 316 317 318 319 <li><a href="https://scala.epfl.ch/">The Scala Center</a></li> 320 321 322 </ul> 323 324 <ul class="contribute"> 325 <li><h3>Contribute</h3></li> 326 327 328 <li><a href="/contribute/">How to help</a></li> 329 330 331 332 <li><a href="/contribute/bug-reporting-guide.html">Report an Issue</a></li> 333 334 335 </ul> 336 337 <ul class="scala"> 338 <li><h3>Scala</h3></li> 339 340 341 <li><a href="/governance/">Governance</a></li> 342 343 344 345 <li><a href="/blog/">Blog</a></li> 346 347 348 349 <li><a href="/conduct.html">Code of Conduct</a></li> 350 351 352 353 <li>
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