Comments (4)
Oh okay, that's embarrassing, apologies for the mistake. I was confused here because
curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
Has an exit code of 0, hence Dockerfile execution continues, whereas
curl -fsSL https://deb.nodesource.com/setup_20.x
Has an exit code of 127.
I wonder if there's an alternative way to formulate a command to download and run https://deb.nodesource.com/setup_20.x that will fail if curl is not present?
Especially as this behavior will mask other errors, such as transient 5xx failures, meaning curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
isn't really safe in an automated context.
from distributions.
@riosje unfortunately the formulation with the &&
is subject to the same issue.
As I said above, curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
has an exit code of 0 when curl is not available. I'm not that deep on shell internals, but it appears the exit code is the zero from the bash
that is the pipe destination, not the curl
command pipe source with it's 127 exit code.
This is why I formulated things as I did. From a Dockerfile perspective
RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
RUN apt-get install -y nodejs
is functionally equivalent to
RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - && apt-get install -y nodejs
with execution being halted before apt-get
runs if curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
has a non-zero exit code.
You can see this empirically with the Dockerfile
FROM python:3.11-slim-bookworm
RUN apt-get update --fix-missing && apt-get upgrade -y && apt-get dist-upgrade -y
RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - && apt-get install -y nodejs
RUN node -v
RUN npm -v
Which is subject to the same issue as my original reproduction.
from distributions.
Hi @SamStephens.
I tried you Dockerfile but it fails because at first curl
is not installed, for that reason
Try installing curl
at first :
FROM python:3.11-slim-bookworm
RUN apt-get update -y && apt-get install curl -y
RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
RUN apt-get install -y nodejs
RUN node -v
RUN npm -v
from distributions.
Hi @SamStephens that's why we have the following in the README.
curl -fsSL https://deb.nodesource.com/setup_20.x | bash - && \
apt-get install -y nodejs
The apt-get install
will not be executed unless the curl returns an exit code 0.
That's what the &&
operator does.
from distributions.
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