How to fix "Illegal option" error when compiling a dockerfile?

Question

I have an application in dockerfile where it is necessary to call a .sh file to download packages, but there is always an error when calling this file.

My dockerfile is:

FROM alpine:3.12 as builder

ARG VERSION=7.16.0
ARG DISTRO=tomcat
ARG SNAPSHOT=true

ARG JMX_PROMETHEUS_VERSION=0.12.0

RUN apk add --no-cache \
        bash \
        ca-certificates \
        maven \
        tar \
        wget \
        xmlstarlet

COPY settings.xml download.sh camunda-run.sh camunda-tomcat.sh camunda-wildfly.sh  /tmp/

RUN /tmp/download.sh

FROM alpine:3.12

RUN apk add --no-cache \
        bash \
        ca-certificates \
        curl \
        openjdk11-jre-headless \
        tzdata \
        tini \
        xmlstarlet \
    && curl -o /usr/local/bin/wait-for-it.sh \
      "https://raw.githubusercontent.com/vishnubob/wait-for-it/a454892f3c2ebbc22bd15e446415b8fcb7c1cfa4/wait-for-it.sh" \
    && chmod +x /usr/local/bin/wait-for-it.sh

RUN addgroup -g 1000 -S camunda && \
    adduser -u 1000 -S camunda -G camunda -h /camunda -s /bin/bash -D camunda
WORKDIR /camunda
USER camunda

ENTRYPOINT ["/sbin/tini", "--"]
CMD ["./camunda.sh"]

COPY --chown=camunda:camunda --from=builder /camunda .

My download.sh file looks exactly like this: https://github.com/camunda/docker-camunda-bpm-platform/blob/next/download.sh

When running the command: docker build . -t servicecamundadocker/latest i get the error:

 => ERROR [builder 4/4] RUN /tmp/download.sh                                                                                       0.2s ------
 > [builder 4/4] RUN /tmp/download.sh:
#11 0.216 /bin/sh: illegal option -
------

Does anyone know how to fix this error? Thanks

Answer 1

After a lot of research, I found the solution.

The problem is that Windows uses \r\n as an end of line, whereas unix only uses \n. So, inside my download.sh file, there was a ^M character that led to the error /bin/sh: illegal option

The solution was to copy the code from the downlod.sh file and convert it to LF:

• Use the text editor such as Notepad++ at the Windows machine to convert
  • Go to menu Edit -> EOL Conversion -> Unix (LF)

Once that is done, the docker build works correctly.

Thank you all for the support.