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DockerfileのRUNで行の区切りを入れたい場合:;\が便利

Posted at

使う前

Dockerfile
RUN \
  set -eux ;\
  echo "1" ;\
  echo "2" ;\
  echo "3" ;\
  echo "4" ;\
  echo "done"

使った場合

Dockerfile
RUN \
  set -eux ;\
  echo "1" ;\
  :;\
  echo "2" ;\
  :;\
  echo "3" ;\
  :;\
  echo "4" ;\
  :;\
  echo "done"
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