Dockerfile - /bin/sh: 1: /root/.cache/dfinity/versions/0.19.0/moc: not found

Developers CDK
1

Hey everyone,

I’m encountering an issue while building my Docker image, and I’d appreciate some help troubleshooting it.

Problem: During the Docker build process, I’m consistently getting an error stating “moc not found,” which halts the build process. Here’s the specific error message:

bashCopy code

/bin/sh: 1: /root/.cache/dfinity/versions/0.19.0/moc: not found
ERROR: moc not found. Please check your DFINITY SDK installation.

Dockerfile:45
--------------------
  43 |     
  44 |     # Use ic-mops to install Motoko package dependencies
  45 | >>> RUN mops install
  46 |     
  47 |     # Expose any ports your app needs (adjust as necessary)
--------------------
ERROR: failed to solve: process "/bin/sh -c mops install" did not complete successfully: exit code: 1

Context: I’m using a Dockerfile to set up my development environment. In the Dockerfile, I’ve included commands to install the DFINITY Canister SDK (dfx) and other dependencies required for my project. When i try running the global instalation for mops (motoko package manager), it outputs an error regarding the location of the compiler (moc).

Troubleshooting Steps Taken:

  • Verified that the DFINITY SDK installation completes without errors.
  • Checked the expected installation path for moc after dfx installation.
  • Attempted to directly check for moc using the find command in the Dockerfile.
  • Ensured that the Dockerfile environment is correctly configured to locate moc.

Request for Assistance: Despite these steps, I’m still encountering the “moc not found” error during the Docker build. I’d appreciate any insights or suggestions on how to resolve this issue.

Dockerfile Snippet: Here’s the relevant part of my Dockerfile for reference:

DockerfileCopy code

# Start with the official Node.js base image to get the latest npm along with Node.js
FROM node:latest

# Install system dependencies required for the DFINITY Canister SDK and general development
RUN apt-get update && apt-get install -y \
    curl \
    git \
    build-essential \
    libssl-dev \
    pkg-config \
    cmake \
    && rm -rf /var/lib/apt/lists/*

# Set the environment variable to non-interactively agree to the installation prompts
ENV DFXVM_INIT_YES=true

# Install the DFINITY Canister SDK
RUN curl -fsSL https://internetcomputer.org/install.sh | sh \
    && echo "Install script exit code: $?"

# Define the DFX_PATH environment variable and add it to PATH
ENV DFX_PATH="/root/.local/share/dfx/bin"
ENV PATH="$DFX_PATH:$PATH"

# Verify dfx installation and check if moc is installed correctly
RUN curl -fsSL https://internetcomputer.org/install.sh | sh \
    && echo "Install script exit code: $?"

# Attempt to load the environment and check for `moc`
RUN bash -lc "dfx --version && find / -name moc 2>/dev/null"

# Install ic-mops globally
RUN npm install -g ic-mops

# Set the working directory in the Docker container
WORKDIR /app

# Copy your project files into the working directory
COPY . .

# Install project dependencies including Node.js packages
RUN npm install

# Use ic-mops to install Motoko package dependencies
RUN mops install

# Expose any ports your app needs (adjust as necessary)
EXPOSE 8000

# Commands to run your app
# Assuming dfx, generate, copy commands and deploy commands are needed
RUN dfx start --background --clean \
    && dfx generate \
    && cp src/declarations/users/* .dfx/local/canisters/users/ \
    && cp src/declarations/user_index/* .dfx/local/canisters/user_index/ \
    && cp src/declarations/token/* .dfx/local/canisters/token/ \
    && cp src/declarations/token_index/* .dfx/local/canisters/token_index/ \
    && cp src/declarations/agent/* .dfx/local/canisters/agent/ \
    && cp src/declarations/marketplace/* .dfx/local/canisters/marketplace/ \
    && cp src/declarations/http_service/* .dfx/local/canisters/http_service/ \
    && dfx deploy

# CMD to keep the container running

Conclusion: If anyone has encountered a similar issue or has any suggestions on how to resolve it, I’d greatly appreciate your input. Thank you in advance for your help!

2

@ZenVoich might have some insight. Looks like mops can’t find moc

3

ok… do you have anything i could do? thanks!

4

Im not sure, thats why i pinged the creator

I think MOPS is setup to get the cached dfx binaries, so you might need to run something with dfx before MOPS install? I think there is something weird where you install it, but until you run dfx first, the binaries are not in the right place?

5

dfx lazily populates the cache when required, e.g. when running dfx start. To force cache installation you can use dfx cache install

1 Like
6

Adding this actually solved it, thanks :slight_smile:

1 Like