d2dagre: use native Go Dagro port

.gitattributes

@@ -2,7 +2,6 @@
 **/testdata/**/*.json linguist-generated
 go.mod linguist-generated
 go.sum linguist-generated
-d2layouts/d2dagrelayout/dagre.js linguist-vendored
 d2layouts/d2elklayout/elk.js linguist-vendored
 d2renderers/d2svg/github-markdown.css linguist-vendored
 d2renderers/d2latex/mathjax.js linguist-vendored

.prettierignore

@@ -1,4 +1,3 @@
-d2layouts/d2dagrelayout/dagre.js
 d2layouts/d2elklayout/setup.js
 d2renderers/d2latex/mathjax.js
 d2renderers/d2latex/polyfills.js

LICENSE.txt

@@ -372,4 +372,4 @@ Exhibit B - "Incompatible With Secondary Licenses" Notice
 ---------------------------------------------------------
 
   This Source Code Form is "Incompatible With Secondary Licenses", as
-  defined by the Mozilla Public License, v. 2.0.
+  defined by the Mozilla Public License, v. 2.0.

README.md

@@ -193,9 +193,9 @@ bundled with the build or separately installed as a standalone binary.
 
 **Layout engines**:
 
-- [dagre](https://github.com/dagrejs/dagre) (default, bundled): A fast, directed graph
-  layout engine that produces layered/hierarchical layouts. Based on Graphviz's DOT
-  algorithm.
+- [Dagro](https://github.com/d2lang/dagro) (default, bundled): A native Go port of the
+  Dagre directed graph layout engine that produces layered/hierarchical layouts. Based
+  on Graphviz's DOT algorithm.
 - [ELK](https://github.com/kieler/elkjs) (bundled): A directed graph layout engine
   particularly suited for node-link diagrams with an inherent direction and ports.
 - [TALA](https://github.com/terrastruct/TALA) (binary): Novel layout engine designed

THIRD_PARTY_NOTICES.txt

@@ -0,0 +1,38 @@
+D2 Third-Party Notices
+
+Dagro
+https://github.com/d2lang/dagro
+
+Dagro is a Go port of Dagre 0.8.5 and the subset of Graphlib 2.1.8 required by
+Dagre's layout implementation. The port is based on these upstream sources:
+
+  Dagre 0.8.5
+  https://github.com/dagrejs/dagre
+  commit f56edb1abbb8530e532158f7cbd403228f5b0018
+
+  Graphlib 2.1.8
+  https://github.com/dagrejs/graphlib
+  commit 64375bb8d96bce0d906d238853c2b5afa2f2c231
+
+MIT License
+
+Copyright (c) 2012-2014 Chris Pettitt
+Copyright (c) 2026 Dagro contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

ci/release/README.md

@@ -54,10 +54,6 @@ it depends on from ../sub/lib.
 - ./build.sh builds the release archives for each platform into ./build/<VERSION>/*.tar.gz
   Run with --help for usage.
 
-> note: Remember for production releases you need to set the $TSTRUCT_OS_ARCH_BUILDER
-> variables as we must compile d2 directly on each release target to include dagre.
-> See https://github.com/d2lang/d2/issues/31
-
 Use `--host-only` to build only the release for the host's `$OS-$ARCH` pair.
 
 ### Docker image helper

ci/release/_build.sh

@@ -6,6 +6,7 @@ cd -- "$(dirname "$0")/../.."
 sh_c rm -Rf "$HW_BUILD_DIR"
 sh_c mkdir -p "$HW_BUILD_DIR"
 sh_c cp ./ci/release/template/LICENSE.txt "$HW_BUILD_DIR"
+sh_c cp ./THIRD_PARTY_NOTICES.txt "$HW_BUILD_DIR"
 sh_c cp ./ci/release/template/Makefile "$HW_BUILD_DIR"
 sh_c cp -R ./ci/release/template/man "$HW_BUILD_DIR"
 sh_c cp -R ./ci/release/template/scripts "$HW_BUILD_DIR"

ci/release/build.sh

@@ -155,6 +155,7 @@ build_windows_msi() {
   REMOTE_HOST=$CI_D2_WINDOWS_AMD64
 
   ln -sf "../build/$VERSION/windows-amd64/d2-$VERSION/bin/d2.exe" ./ci/release/windows/d2.exe
+  ln -sf "../build/$VERSION/windows-amd64/d2-$VERSION/THIRD_PARTY_NOTICES.txt" ./ci/release/windows/THIRD_PARTY_NOTICES.txt
   sh_c rsync --archive --human-readable --copy-links --delete ./ci/release/windows/ "'$REMOTE_HOST:windows/'"
   if ! echo "$VERSION" | grep '[0-9]\.[0-9]\.[0-9]'; then
     WIX_VERSION=0.0.0

ci/release/changelogs/next.md

@@ -4,6 +4,7 @@
 
 #### Improvements 🧹
 
+- d2dagre: replace the embedded JavaScript runtime with the native Go Dagro port without changing layout output
 - d2ascii:
   - sql_table and uml class shapes are supported [#2623](https://github.com/d2lang/d2/pull/2623)
   - newlines are handled [#2626](https://github.com/d2lang/d2/pull/2626)

ci/release/windows/.gitignore

@@ -1 +1,2 @@
 d2.exe
+THIRD_PARTY_NOTICES.txt

ci/release/windows/d2.wxs

@@ -16,6 +16,7 @@ This file was pieced together from:
 
         <Feature Id="Complete" Level="1">
             <ComponentRef Id="Executable" />
+            <ComponentRef Id="ThirdPartyNotices" />
         </Feature>
 
         <MajorUpgrade AllowSameVersionUpgrades='yes' DowngradeErrorMessage="A later version of [ProductName] is already installed. Setup will now exit."/>
@@ -33,6 +34,9 @@ This file was pieced together from:
                       System="yes"
                       Value="[INSTALLDIR]" />
                 </Component>
+                <Component Id="ThirdPartyNotices" Guid="aa19f8b5-c7c4-4e94-b322-1cd32bf3d649">
+                    <File Id="ThirdPartyNoticesFile" Name="THIRD_PARTY_NOTICES.txt" Source="THIRD_PARTY_NOTICES.txt" KeyPath="yes" />
+                </Component>
             </Directory>
         </StandardDirectory>
     </Package>