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トップ > Ruby on Rails > node-sass インストール時に gyp 関連でエラーが出た

node-sass インストール時に gyp 関連でエラーが出た

Ruby on Rails

Rails 使ってるのに Node.js とか Python とか云われても わからん...

環境

  • MacOS Big Sur Ver.11.1
  • anyenv + pyenv

概要・状況

  1. Rais プロジェクトで
  2. yarn install したら
  3. node-sass をインストールするために
  4. node-gyp をインストールしようとして
  5. python2 が見つからなくて そこでコケた

原因

anyenv, pyenv を利用して Python のバージョン切り替え... 3系を利用していた

解決

Rails プロジェクト ディレクトリのルートに .python-version を設置し、2系を定義した

(pyenv local 2.7.18 を実行した)

ログ全文

gouf@gouf-MacBook-Pro:~/my_rails_app (main)$ yarn install
yarn install v1.22.10
warning ../package.json: No license field
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
[3/4] 🔗  Linking dependencies...
warning " > webpack-dev-server@3.11.0" has unmet peer dependency "webpack@^4.0.0 || ^5.0.0".
warning "webpack-dev-server > webpack-dev-middleware@3.7.2" has unmet peer dependency "webpack@^4.0.0".
[4/4] 🔨  Building fresh packages...
[-/3] ⠐ waiting...
[-/3] ⠐ waiting...
error /Users/gouf/my_rails_app/node_modules/node-sass: Command failed.
Exit code: 1
Command: node scripts/build.js
Arguments:
Directory: /Users/gouf/my_rails_app/node_modules/node-sass
Output:
Building: /usr/local/Cellar/node/15.3.0/bin/node /Users/gouf/my_rails_app/node_modules/node-gyp/bin/node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
gyp info it worked if it ends with ok
gyp verb cli [
gyp verb cli   '/usr/local/Cellar/node/15.3.0/bin/node',
gyp verb cli   '/Users/gouf/my_rails_app/node_modules/node-gyp/bin/node-gyp.js',
gyp verb cli   'rebuild',
gyp verb cli   '--verbose',
gyp verb cli   '--libsass_ext=',
gyp verb cli   '--libsass_cflags=',
gyp verb cli   '--libsass_ldflags=',
gyp verb cli   '--libsass_library='
gyp verb cli ]
gyp info using node-gyp@3.8.0
gyp info using node@15.3.0 | darwin | x64
gyp verb command rebuild []
gyp verb command clean []
gyp verb clean removing "build" directory
gyp verb command configure []
gyp verb check python checking for Python executable "python2" in the PATH
gyp verb `which` succeeded python2 /Users/gouf/.anyenv/envs/pyenv/shims/python2
gyp ERR! configure error
gyp ERR! stack Error: Command failed: /Users/gouf/.anyenv/envs/pyenv/shims/python2 -c import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack pyenv: python2: command not found
gyp ERR! stack
gyp ERR! stack The `python2' command exists in these Python versions:
gyp ERR! stack   2.7.16
gyp ERR! stack   2.7.18
gyp ERR! stack
gyp ERR! stack Note: See 'pyenv help global' for tips on allowing both
gyp ERR! stack       python2 and python3 to be found.
gyp ERR! stack
gyp ERR! stack     at ChildProcess.exithandler (node:child_process:309:12)
gyp ERR! stack     at ChildProcess.emit (node:events:376:20)
gyp ERR! stack     at maybeClose (node:internal/child_process:1055:16)
gyp ERR! stack     at Socket.<anonymous> (node:internal/child_process:441:11)
gyp ERR! stack     at Socket.emit (node:events:376:20)
gyp ERR! stack     at Pipe.<anonymous> (node:net:661:12)
gyp ERR! System Darwin 20.2.0
gyp ERR! command "/usr/local/Cellar/node/15.3.0/bin/node" "/Users/gouf/my_rails_app/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd /Users/gouf/my_rails_app/node_modules/node-sass
gyp ERR! node -v v15.3.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok

ログの見方

今回注目すべきは 次の2行だった

gyp verb `which` succeeded python2 /Users/gouf/.anyenv/envs/pyenv/shims/python2

gyp ERR! stack pyenv: python2: command not found

python2 の path は見つかるものの、pyenv global で 3系を有効化してるので python2 コマンドが利用できない、という状況になっていた

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