Copy several assets in one layer





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I want to do this:



COPY src/ public/ config-overrides.js /usr/src/app/


But I have learnt the hard way that this actually means:



COPY src/* public/* config-overrides.js /usr/src/app/


Which is not at all what I want.



I can hack this via a .dockerignore, but I do not like that solution because:




  • if a new file is added to the repo, it needs to be added to the .dockerignore too.

  • I like to explicitly list the dependencies in my Dockerfile


How can I copy an explicit list of files and directories (not just the contents) in a single layer?



Am I simply SOL?










share|improve this question





























    0















    I want to do this:



    COPY src/ public/ config-overrides.js /usr/src/app/


    But I have learnt the hard way that this actually means:



    COPY src/* public/* config-overrides.js /usr/src/app/


    Which is not at all what I want.



    I can hack this via a .dockerignore, but I do not like that solution because:




    • if a new file is added to the repo, it needs to be added to the .dockerignore too.

    • I like to explicitly list the dependencies in my Dockerfile


    How can I copy an explicit list of files and directories (not just the contents) in a single layer?



    Am I simply SOL?










    share|improve this question

























      0












      0








      0








      I want to do this:



      COPY src/ public/ config-overrides.js /usr/src/app/


      But I have learnt the hard way that this actually means:



      COPY src/* public/* config-overrides.js /usr/src/app/


      Which is not at all what I want.



      I can hack this via a .dockerignore, but I do not like that solution because:




      • if a new file is added to the repo, it needs to be added to the .dockerignore too.

      • I like to explicitly list the dependencies in my Dockerfile


      How can I copy an explicit list of files and directories (not just the contents) in a single layer?



      Am I simply SOL?










      share|improve this question














      I want to do this:



      COPY src/ public/ config-overrides.js /usr/src/app/


      But I have learnt the hard way that this actually means:



      COPY src/* public/* config-overrides.js /usr/src/app/


      Which is not at all what I want.



      I can hack this via a .dockerignore, but I do not like that solution because:




      • if a new file is added to the repo, it needs to be added to the .dockerignore too.

      • I like to explicitly list the dependencies in my Dockerfile


      How can I copy an explicit list of files and directories (not just the contents) in a single layer?



      Am I simply SOL?







      linux docker






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 30 at 20:21









      dangonfastdangonfast

      1,11531429




      1,11531429






















          1 Answer
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          active

          oldest

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          0














          You can reorganize the repo:



          app
          +-- src
          +-- public
          -- config-overrides.js


          And then you would just



          COPY app/ /usr/src/app/




          Another option is to go with a multi-stage build:



          FROM scratch as app
          COPY src/ /usr/src/app/
          COPY public/ /usr/src/app/
          COPY config-overrides.js /usr/src/app/

          FROM your_base
          COPY --from=app /usr/src/app/ /usr/src/app/




          Otherwise, keep it 3 separate layers. The added overhead of an additional layer is really minimal. The times you want to merge layers are when you get dozens of layers, if you have the same file in multiple layers and would overwrite it, or you change/delete a file that was created in a previous layer.






          share|improve this answer
























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            1 Answer
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            active

            oldest

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            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            0














            You can reorganize the repo:



            app
            +-- src
            +-- public
            -- config-overrides.js


            And then you would just



            COPY app/ /usr/src/app/




            Another option is to go with a multi-stage build:



            FROM scratch as app
            COPY src/ /usr/src/app/
            COPY public/ /usr/src/app/
            COPY config-overrides.js /usr/src/app/

            FROM your_base
            COPY --from=app /usr/src/app/ /usr/src/app/




            Otherwise, keep it 3 separate layers. The added overhead of an additional layer is really minimal. The times you want to merge layers are when you get dozens of layers, if you have the same file in multiple layers and would overwrite it, or you change/delete a file that was created in a previous layer.






            share|improve this answer




























              0














              You can reorganize the repo:



              app
              +-- src
              +-- public
              -- config-overrides.js


              And then you would just



              COPY app/ /usr/src/app/




              Another option is to go with a multi-stage build:



              FROM scratch as app
              COPY src/ /usr/src/app/
              COPY public/ /usr/src/app/
              COPY config-overrides.js /usr/src/app/

              FROM your_base
              COPY --from=app /usr/src/app/ /usr/src/app/




              Otherwise, keep it 3 separate layers. The added overhead of an additional layer is really minimal. The times you want to merge layers are when you get dozens of layers, if you have the same file in multiple layers and would overwrite it, or you change/delete a file that was created in a previous layer.






              share|improve this answer


























                0












                0








                0







                You can reorganize the repo:



                app
                +-- src
                +-- public
                -- config-overrides.js


                And then you would just



                COPY app/ /usr/src/app/




                Another option is to go with a multi-stage build:



                FROM scratch as app
                COPY src/ /usr/src/app/
                COPY public/ /usr/src/app/
                COPY config-overrides.js /usr/src/app/

                FROM your_base
                COPY --from=app /usr/src/app/ /usr/src/app/




                Otherwise, keep it 3 separate layers. The added overhead of an additional layer is really minimal. The times you want to merge layers are when you get dozens of layers, if you have the same file in multiple layers and would overwrite it, or you change/delete a file that was created in a previous layer.






                share|improve this answer













                You can reorganize the repo:



                app
                +-- src
                +-- public
                -- config-overrides.js


                And then you would just



                COPY app/ /usr/src/app/




                Another option is to go with a multi-stage build:



                FROM scratch as app
                COPY src/ /usr/src/app/
                COPY public/ /usr/src/app/
                COPY config-overrides.js /usr/src/app/

                FROM your_base
                COPY --from=app /usr/src/app/ /usr/src/app/




                Otherwise, keep it 3 separate layers. The added overhead of an additional layer is really minimal. The times you want to merge layers are when you get dozens of layers, if you have the same file in multiple layers and would overwrite it, or you change/delete a file that was created in a previous layer.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Jan 31 at 18:31









                BMitchBMitch

                23717




                23717






























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