Dockerfile for running Phase2 Yeoman generators and capturing the output via a volume mount.

docker-compose.yml

version: "2.1"

services:
  # Run the gadget generator.
  gadget:
    extends: base
    entrypoint: [ "yo", "gadget", "--no-insight", "--skip-install" ]

  # Run the pattern-label-starter generator.
  pls:
    extends: base
    entrypoint: [ "yo", "pattern-lab-starter", "--no-insight", "--skip-install" ]

  # Run the generator-p2 generator. Extends from 'cli' service because we
  # cannot install private libraries in the Dockerfile.
  p2:
    extends: cli
    entrypoint: [ "yo", "p2", "--no-insight", "--skip-install" ]

  # Run the generator-p2-env generator. Extends from 'cli' service because we
  # cannot install private libraries in the Dockerfile.
  p2-env:
    extends: cli
    entrypoint: [ "yo", "p2-env", "--no-insight", "--skip-install" ]

  # Run the generator-p2-env generator. Extends from 'cli' service because we
  # cannot install private libraries in the Dockerfile.
  p2-jenkins:
    extends: cli
    entrypoint: [ "yo", "p2-env:jenkins", "--no-insight", "--skip-install" ]

  # Run the generator-p2-env generator. Extends from 'cli' service because we
  # cannot install private libraries in the Dockerfile.
  p2-env-test:
    extends: cli
    entrypoint: "npm test"
    working_dir: /usr/local/lib/node_modules/generator-p2-env
 
  # Facilitates development against local clones of the "private" generators.
  # The source location of the volume mounts is arbitrary. The destination is
  # the global install path for npm inside the container and simulates the
  # result of installing properly.
  #
  # From inside the container you can navigate to the projects in this location
  # and run npm install or (from generator-p2) npm link generator-p2-env.
  cli:
    extends: base
    entrypoint: /bin/sh
    volumes:
      - ./generator-p2:/usr/local/lib/node_modules/generator-p2
      - ./generator-p2-env:/usr/local/lib/node_modules/generator-p2-env

  # Provides a common baseline of assembling the Docker image and output
  # location of the generated code.
  #
  # All generated output via normal use of this Dockerfile outputs code in
  # '~/Projects/newproject', however you can run with YO_PROJECT_DIRECTORY
  # environment variable to choose a different location.
  base:
    build: .
    network_mode: "bridge"
    volumes:
      - ${YO_PROJECT_DIRECTORY:-~/Projects/newproject}:/generated

Dockerfile-yeoman

FROM node:4-alpine

ENV YO_P2_VERSION 2.2.0
ENV PATTERN_LAB_STARTER_VERSION 2.0.0
ENV GADGET_VERSION 1.0.0-rc1
ENV P2_ENV_VERSION 1.2.0

RUN node -v
RUN npm -v
RUN echo "Yeoman Doctor will warn about our npm version being outdated. It is expected and OK."
RUN npm install --global --silent yo
RUN npm install --global --silent generator-gadget@v$GADGET_VERSION
RUN npm install --global --silent generator-pattern-lab-starter@v$PATTERN_LAB_STARTER_VERSION
# These generators remain private and so cannot be installed yet.
# RUN npm install --global --silent git+ssh://bitbucket.org/phase2tech/generator-p2.git#v$YO_P2_VERSION
# RUN npm install --global --silent git+ssh://bitbucket.org/phase2tech/generator-p2-env.git#v$P2_ENV_VERSION

# Add a yeoman user because Yeoman freaks out and runs setuid(501).
# This was because less technical people would run Yeoman as root and cause problems.
# Setting uid to 501 here since it's already a random number being thrown around.
# @see https://github.com/yeoman/yeoman.github.io/issues/282
# @see https://github.com/cthulhu666/docker-yeoman/blob/master/Dockerfile
RUN adduser -D -u 501 yeoman && \
  echo "yeoman ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers

# Yeoman needs the use of a home directory for caching and certain config storage.
ENV HOME /home/yeoman

RUN mkdir /generated && chown yeoman:yeoman /generated
WORKDIR /generated

# Always run as the yeoman user
USER yeoman

CMD /bin/sh

# Run a Yeoman generator with a command such as:
# docker build -t yeoman .
# docker run -it -v "/Users/username/Projects/newproject:/generated" --rm yeoman yo gadget --no-insight --skip-install

# The --no-insight flag is recommended to avoid prompts for usage collection.
# @see https://github.com/yeoman/yo/issues/20