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WSL上にRuby on railsの環境を構築する

Last updated at Posted at 2019-04-12

gitの導入

sudo apt-get install git

rbenvの導入

rbenv:Rubyのバージョンを管理するツール

git clone https://github.com/sstephenson/rbenv.git ~/.rbenv
git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
git clone https://github.com/rkh/rbenv-update.git ~/.rbenv/plugins/rbenv-update

パスを通す

echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile 
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile 

Rubyの導入

2019/04/13時点で安定版の2.6.2を導入

rbenv install 2.6.2

うまくいかない

Inspect or clean up the working tree at /tmp/ruby-build.20190413020215.166
Results logged to /tmp/ruby-build.20190413020215.166.log

Last 10 log lines:
checking for ruby... false
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... x86_64-pc-linux-gnu
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/tmp/ruby-build.20190413020215.166/ruby-2.6.2':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details

Cコンパイラが無いせいらしい
インストール

sudo apt-get install gcc

またエラー

Inspect or clean up the working tree at /tmp/ruby-build.20190413022147.4755
Results logged to /tmp/ruby-build.20190413022147.4755.log

Last 10 log lines:
checking for _setjmp as a macro or function... yes
checking for sigsetjmp as a macro or function... no
checking for setjmp type... __builtin_setjmp
checking for prefix of external symbols... NONE
checking pthread.h usability... yes
checking pthread.h presence... yes
checking for pthread.h... yes
checking if make is GNU make... ./configure: line 29155: make: command not found
no
checking for safe null command for make... configure: error: no candidate for safe null command

makeコマンドがないみたい
インストール

sudo apt-get install make

またエラー

Inspect or clean up the working tree at /tmp/ruby-build.20190413022903.11877
Results logged to /tmp/ruby-build.20190413022903.11877.log

Last 10 log lines:
The Ruby openssl extension was not compiled.
The Ruby readline extension was not compiled.
The Ruby zlib extension was not compiled.
ERROR: Ruby install aborted due to missing extensions
Try running `apt-get install -y libssl-dev libreadline-dev zlib1g-dev` to fetch missing dependencies.

エラー文を見て必要そうなパッケージをインストール

sudo apt-get install -y libssl-dev libreadline-dev zlib1g-dev

いけた

$ rbenv install 2.6.2
Downloading ruby-2.6.2.tar.bz2...
-> https://cache.ruby-lang.org/pub/ruby/2.6/ruby-2.6.2.tar.bz2
Installing ruby-2.6.2...
Installed ruby-2.6.2 to /home/${username}/.rbenv/versions/2.6.2

これだけだとrbenvディレクトリにのみRuby 2.6.2が適用されているので、環境全体に適用する

rbenv global 2.6.2
ruby -v
ruby 2.6.2p47 (2019-03-13 revision 67232) [x86_64-linux]

railsの導入

gemは導入済み

gem -v
3.0.3

インストール

gem install rails

Node.jsの導入

rails上でサーバを起動する際にjavascriptランタイムが必要になるので、Node.jsをインストール
普通にaptコマンドでインストールするとバージョンが古かったりするので、一工夫必要

まずは普通にnodejsとnpmをインストール

sudo apt install -y nodejs npm

次にn packecge(Node.jsのバージョン管理パッケージ)をインストール

sudo npm install n -g

再度Node.jsをインストール

sudo n stable

先に入れたNode.jsをアンイストール

sudo apt purge -y nodejs npm

以下実行

exec $SHELL -l

最新安定版がインストールされていることを確認

$ node -v
v10.15.3

以上

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