docker compose build with ssh clone, install from private git repo

dc

eval $(ssh-agent)
ssh-add ~/.ssh/id_rsa  # pass own path
export COMPOSE_DOCKER_CLI_BUILD=1
export DOCKER_BUILDKIT=1
docker-compose build --ssh default=$SSH_AUTH_SOCK

Dockerfile

# Docs: https://docs.docker.com/reference/dockerfile/#run---mounttypessh
# req.txt: pckgname @ git+ssh://[email protected]/<repo>.git@<version if need>

# in terminal: 

# syntax=docker/dockerfile:1

FROM python:3.12-alpine AS build
RUN apk add --no-cache git openssh-client

RUN mkdir -p -m 0700 ~/.ssh && ssh-keyscan github.com >> ~/.ssh/known_hosts


WORKDIR /app
COPY req.txt .
RUN --mount=type=ssh \
    pip install --user -r req.txt