Github Action - Docker build: file not found in build context or excluded-CodePudding

I'm having issues with my Github action where I'm trying to build my Docker image after building my jar and it throws this error:

Step 8/9 : COPY /home/runner/work/js-sites-client-api/js-sites-client-api/build/libs/client-portal-api.jar app.jar
COPY failed: file not found in build context or excluded by .dockerignore: stat home/runner/work/js-sites-client-api/js-sites-client-api/build/libs/client-portal-api.jar: file does not exist

Which doesn't make sense to me because I ran LS/PWD and I can see that the file IS there:

  ls build/libs
  cd build/libs
  pwd
  cd ../../
  docker build . --file Dockerfile --tag ***/js-client-api:latest
  shell: /usr/bin/bash -e {0}
  env:
    JAVA_HOME: /opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/11.0.14-1/x64
    GRADLE_BUILD_ACTION_CACHE_RESTORED: true
-------------OUTPUT of ls/pwd------------
client-portal-api.jar
/home/runner/work/js-sites-client-api/js-sites-client-api/build/libs

Below is my github action:

...

jobs:

  build:
...

    steps:
    - uses: actions/checkout@v2
    - name: Set up JDK 11
      uses: actions/setup-java@v2
      with:
        java-version: '11'
        distribution: 'temurin'
        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: Change wrapper permissions
      run: chmod  x ./gradlew
    - name: Build with Gradle
      uses: gradle/gradle-build-action@937999e9cc2425eddc7fd62d1053baf041147db7
      with:
        arguments: build
    
    - name: Log in to Docker Hub
      uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
      with:
        username: ${{ secrets.DOCKER_USERNAME }}
        password: ${{ secrets.DOCKER_PASSWORD }}
    
    - name: Build the Docker image
      run: |
        ls build/libs
        cd build/libs
        pwd
        cd ../../
        docker build . --file Dockerfile --tag ${{ secrets.DOCKER_USERNAME }}/js-client-api:latest --build-arg WORKDIR=${{ github.workspace }}
    
    - name: Push the Docker image
      run: docker push ${{ secrets.DOCKER_USERNAME }}/js-client-api:latest

Any help would be much appreciated!

CodePudding user response：

This line in your Dockerfile is the issue: COPY /home/runner/work/js-sites-client-api/js-sites-client-api/build/libs/client-portal-api.jar app.jar. In a Dockerfile COPY, the first argument is the location of the file(s) on the machine, which has to be a relative path, not an absolute one. Read more here

Multiple resources may be specified but the paths of files and directories will be interpreted as relative to the source of the context of the build.