Hi, I’ve been trying to upload a maven artefact to GitHub Packages within a workflow, but encountered a HTTP response 400: Bad request. After some research, I found that it was due to the upload of a SNAPSHOT version, and the use of a classifier (with sources and javadoc). I found a similar issue here: Error on Github Packages for `-SNAPSHOT` maven artifacts with a classifier, which isn’t solved. However I found another related issue (Partial support for maven SNAPSHOTs) where jscandale points out that it should be fixed, and where the original poster confirmed it worked, though I still have the problem on my side.
I continued my research but didn’t find any more information that could help me fix the issue.

Here’s my action file

# This workflow will build a package using Maven and then publish it to GitHub packages when a release is created
# For more information see: https://github.com/actions/setup-java#apache-maven-with-a-settings-path
name: Publish maven package to GitHub Packages
on:

push:

branches: [master, sql]

release:

types: [created]
jobs:

build:
runs-on: ubuntu-latest
permissions:
  contents: read
  packages: write

steps:
  - uses: actions/checkout@v2
  - name: Set up JDK 16
    uses: actions/setup-java@v2
    with:
      java-version: '16'
      distribution: 'adopt'
      server-id: github # Value of the distributionManagement/repository/id field of the pom.xml
      settings-path: ${{ github.workspace }} # location for the settings.xml file

  - name: Build with Maven
    run: mvn -B package --file pom.xml

  - name: Publish to GitHub Packages Apache Maven
    run: mvn deploy -s $GITHUB_WORKSPACE/settings.xml
    env:
      GITHUB_TOKEN: ${{ github.token }}

  - uses: actions/upload-artifact@v2
    with:
      name: tesseractLib
      path: |
        /home/runner/work/TesseractLib/TesseractLib/target/*.jar
        !/home/runner/work/TesseractLib/TesseractLib/target/*sources.jar
        !/home/runner/work/TesseractLib/TesseractLib/target/original*.jar

And my pom.xml file

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
&lt;groupId&gt;onl.tesseract&lt;/groupId&gt;
&lt;artifactId&gt;tesseractlib&lt;/artifactId&gt;
&lt;version&gt;2.0-SNAPSHOT&lt;/version&gt;
&lt;packaging&gt;jar&lt;/packaging&gt;

&lt;properties&gt;
    &lt;java.version&gt;16&lt;/java.version&gt;
    &lt;maven.compiler.source&gt;16&lt;/maven.compiler.source&gt;
    &lt;maven.compiler.target&gt;16&lt;/maven.compiler.target&gt;
    &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt;
&lt;/properties&gt;
     
&lt;distributionManagement&gt;
     &lt;repository&gt;
         &lt;id&gt;github&lt;/id&gt;
         &lt;name&gt;GitHub Packages&lt;/name&gt;
         &lt;url&gt;https://maven.pkg.github.com/TesseractFR/TesseractLib&lt;/url&gt;
     &lt;/repository&gt;
 &lt;/distributionManagement&gt;
     
&lt;build&gt;
    &lt;plugins&gt;
        &lt;plugin&gt;
            &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
            &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
            &lt;version&gt;3.8.1&lt;/version&gt;
            &lt;configuration&gt;
                &lt;source&gt;16&lt;/source&gt;
                &lt;target&gt;16&lt;/target&gt;
            &lt;/configuration&gt;
        &lt;/plugin&gt;
        &lt;plugin&gt;
            &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
            &lt;artifactId&gt;maven-shade-plugin&lt;/artifactId&gt;
            &lt;version&gt;3.2.4&lt;/version&gt;
            &lt;executions&gt;
                &lt;execution&gt;
                    &lt;phase&gt;package&lt;/phase&gt;
                    &lt;goals&gt;
                        &lt;goal&gt;shade&lt;/goal&gt;
                    &lt;/goals&gt;
                    &lt;configuration&gt;
                        &lt;createDependencyReducedPom&gt;false&lt;/createDependencyReducedPom&gt;
                    &lt;/configuration&gt;
                &lt;/execution&gt;
            &lt;/executions&gt;
        &lt;/plugin&gt;
        &lt;plugin&gt;
            &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
            &lt;artifactId&gt;maven-source-plugin&lt;/artifactId&gt;
            &lt;version&gt;3.2.1&lt;/version&gt;
            &lt;executions&gt;
                &lt;execution&gt;
                    &lt;id&gt;attach-sources&lt;/id&gt;
                    &lt;phase&gt;verify&lt;/phase&gt;
                    &lt;goals&gt;
                        &lt;goal&gt;jar-no-fork&lt;/goal&gt;
                    &lt;/goals&gt;
                &lt;/execution&gt;
            &lt;/executions&gt;
        &lt;/plugin&gt;
    &lt;/plugins&gt;
    &lt;resources&gt;
        &lt;resource&gt;
            &lt;directory&gt;src/main/resources&lt;/directory&gt;
            &lt;filtering&gt;true&lt;/filtering&gt;
        &lt;/resource&gt;
    &lt;/resources&gt;
&lt;/build&gt;

&lt;repositories&gt;
    &lt;repository&gt;
        &lt;id&gt;papermc&lt;/id&gt;
        &lt;url&gt;https://papermc.io/repo/repository/maven-public/&lt;/url&gt;
    &lt;/repository&gt;
&lt;/repositories&gt;

&lt;dependencies&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;io.papermc.paper&lt;/groupId&gt;
        &lt;artifactId&gt;paper-api&lt;/artifactId&gt;
        &lt;version&gt;1.17-R0.1-SNAPSHOT&lt;/version&gt;
        &lt;scope&gt;provided&lt;/scope&gt;
    &lt;/dependency&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
        &lt;artifactId&gt;maven-source-plugin&lt;/artifactId&gt;
        &lt;version&gt;3.2.1&lt;/version&gt;
        &lt;type&gt;maven-plugin&lt;/type&gt;
    &lt;/dependency&gt;
&lt;/dependencies&gt;

</project>

Any help would be appreciated