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docker-compose run web rails new . --force --no-deps --database=mysql --skip-test --webpackerでエラーが出た

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#docker-compose run web rails new . --force --no-deps --database=mysql --skip-test --webpackerでエラーが出たが、解決できたので今後のために備忘録。

##参考URL
https://qiita.com/nsy_13/items/9fbc929f173984c30b5d

##登場ファイル

Dockerfile.
FROM ruby:2.6

# install package to docker container
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev \
    && apt-get install apt-transport-https \
    && curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
    && echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list \
    && apt-get update && apt-get install -y yarn \
    && curl -sL https://deb.nodesource.com/setup_10.x | bash - \
    && apt-get install -y nodejs \
    && mkdir /FANTRA

WORKDIR /FANTRA
COPY Gemfile /FANTRA/Gemfile
COPY Gemfile.lock /FANTRA/Gemfile.lock

COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]
EXPOSE 3000

docker-compose.yml
version: '3'
services:
  db:
    image: mysql:8.0
    environment:
      MYSQL_ROOT_PASSWORD: password
    ports:
      - '3306:3306'
    command: --default-authentication-plugin=mysql_native_password
    volumes:
      - mysql-data:/var/lib/mysql
  web:
    build: .
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
    environment:
      RAILS_ENV: development
    volumes:
      - .:/FANTRA
      - bundle:/usr/local/bundle
    ports:
      - "3000:3000"
    depends_on:
      - db
    tty: true

volumes:
  mysql-data:
    driver: local
  bundle:
    driver: local
Gemfile.
source 'https://rubygems.org'
gem 'rails', '~>6'
Gemfile.lock
#空白のまま
entrypoint.sh
#!/bin/bash
set -e

# Remove a potentially pre-existing server.pid for Rails.
rm -f /FANTRA/tmp/pids/server.pid

# Then exec the container's main process (what's set as CMD in the Dockerfile).
exec "$@"

##エラー
上記のファイル等を用意した上で、rails newをしようとすると、

docker-compose run web rails new . --force --no-deps --database=mysql --skip-test --webpacker

こんなエラーが出てきた

WARNING: Image for service web was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
/usr/bin/entrypoint.sh: line 8: exec: rails: not found

docker-compose buildをしろって言ってくれてるから、実行してみる

docker-compose build

再度、rails newをしてみてみると、またエラー。

/usr/bin/entrypoint.sh: line 8: exec: rails: not found

ここでよく見ると、rails: not foundの文字が、、、、、。
Gemfileに書いてあるやつをbundle installしたらええんちゃう???

docker-compose run web bundle install 

これで無事にrails newコマンドを使うことができました。

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