From 40610002950283243d5f2e9bc6490bf02cdab575 Mon Sep 17 00:00:00 2001
From: Chip Wolf <hello@chipwolf.uk>
Date: Tue, 14 Jul 2026 19:49:00 +0100
Subject: [PATCH] fix(fabric-api): download runtime JAR from GitHub Releases

The `fabric-api` input downloaded the top-level Maven artifact, which for
some legacy releases (e.g. 0.77.0+1.18.2) is a thin aggregator JAR with no
nested runtime submodules. Mods depending on Fabric API submodules then
failed at runtime with NoClassDefFoundError.

Use robinraju/release-downloader to fetch the official
`fabric-api-<version>+<mc>.jar` asset from FabricMC/fabric-api releases,
which is the complete end-user distribution for both legacy and modern
publications.

Closes #141
---
 action.yml | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/action.yml b/action.yml
index cc59e83..14b96ae 100644
--- a/action.yml
+++ b/action.yml
@@ -128,10 +128,12 @@ runs:
 
     - if: inputs.fabric-api != 'none'
       name: Download fabric-api v${{ inputs.fabric-api }}
-      run: >
-        curl --create-dirs -o run/mods/fabric-api-${{ inputs.fabric-api }}+${{ inputs.mc }}.jar
-        https://maven.fabricmc.net/net/fabricmc/fabric-api/fabric-api/${{ inputs.fabric-api }}+${{ inputs.mc }}/fabric-api-${{ inputs.fabric-api }}+${{ inputs.mc }}.jar
-      shell: bash
+      uses: robinraju/release-downloader@a96f54c1b5f5e09e47d9504526e96febd949d4c2 # v1.11
+      with:
+        repository: FabricMC/fabric-api
+        tag: '${{ inputs.fabric-api }}+${{ inputs.mc }}'
+        fileName: 'fabric-api-${{ inputs.fabric-api }}+${{ inputs.mc }}.jar'
+        out-file-path: run/mods
 
     - if: inputs.fabric-gametest-api != 'none'
       name: Download fabric-gametest-api v${{ inputs.fabric-gametest-api }}