Expressのnpm installで詰まった

下記コマンドの実行に失敗

npm install express ejs --save

ERRだらけ。。
こいつと戦ったので備忘録残します。

結構かかります。。
きっとなんとかなるので一緒に頑張りましょう...!

下記がエラー内容

・・・省略
xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

No receipt for 'com.apple.pkg.CLTools_Executables' found at '/'.

No receipt for 'com.apple.pkg.DeveloperToolsCLILeo' found at '/'.

No receipt for 'com.apple.pkg.DeveloperToolsCLI' found at '/'.

gyp: No Xcode or CLT version detected!
gyp ERR! configure error 
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/Users/---/Downloads/weblog/node_modules/node-gyp/lib/configure.js:336:16)
gyp ERR! stack     at ChildProcess.emit (events.js:182:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:240:12)
gyp ERR! System Darwin 19.6.0
gyp ERR! command "/usr/local/bin/node" "/Users/---/Downloads/weblog/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd /Users/ーーー/Downloads/weblog/node_modules/node-sass
gyp ERR! node -v v10.15.0
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok 
Build failed with error code: 1
npm WARN weblog@1.0.0 No description
npm WARN weblog@1.0.0 No repository field.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.8.3 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the node-sass@4.8.3 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/ーーー/.npm/_logs/2020-10-03T04_46_42_180Z-debug.log

気になったのはここ

gyp: No Xcode or CLT version detected!

xcodeなんてインストールしたことない...!

ググって下記記事発見！
http://pokuwagata.hatenablog.com/entry/2018/11/04/210256

公式サイトから直接ダウンロード
https://apps.apple.com/jp/app/xcode/id497799835?mt=12

めっちゃ時間かかります。。

インストールできたら、
https://qiita.com/royroy/items/338362362de73a94fc0c
この記事にそってcommand line toolをダウンロード

これでいけるか！
再度実行してみる

npm install express ejs --save

code-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

Traceback (most recent call last):
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/gyp_main.py", line 16, in <module>
    sys.exit(gyp.script_main())
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/pylib/gyp/__init__.py", line 545, in script_main
    return main(sys.argv[1:])
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/pylib/gyp/__init__.py", line 538, in main
    return gyp_main(args)
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/pylib/gyp/__init__.py", line 523, in gyp_main
    generator.GenerateOutput(flat_list, targets, data, params)
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/pylib/gyp/generator/make.py", line 2170, in GenerateOutput
    part_of_all=qualified_target in needed_targets)
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/pylib/gyp/generator/make.py", line 795, in Write
    self.Pchify))
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/pylib/gyp/generator/make.py", line 1190, in WriteSources
    cflags = self.xcode_settings.GetCflags(configname)
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/pylib/gyp/xcode_emulation.py", line 551, in GetCflags
    archs = self.GetActiveArchs(self.configname)
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/pylib/gyp/xcode_emulation.py", line 420, in GetActiveArchs
    xcode_archs_default = GetXcodeArchsDefault()
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/pylib/gyp/xcode_emulation.py", line 118, in GetXcodeArchsDefault
    xcode_version, _ = XcodeVersion()
  File "/Users/---/Downloads/weblog/node_modules/node-gyp/gyp/pylib/gyp/xcode_emulation.py", line 1265, in XcodeVersion
    version = re.match(r'(\d\.\d\.?\d*)', version).groups()[0]
AttributeError: 'NoneType' object has no attribute 'groups'
gyp ERR! configure error 
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/Users/---/Downloads/weblog/node_modules/node-gyp/lib/configure.js:336:16)
gyp ERR! stack     at ChildProcess.emit (events.js:182:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:240:12)
gyp ERR! System Darwin 19.6.0
gyp ERR! command "/usr/local/bin/node" "/Users/---/Downloads/weblog/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd /Users/---/Downloads/weblog/node_modules/node-sass
gyp ERR! node -v v10.15.0
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok 
Build failed with error code: 1
npm WARN weblog@1.0.0 No description
npm WARN weblog@1.0.0 No repository field.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.8.3 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the node-sass@4.8.3 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/---/.npm/_logs/2020-10-03T05_34_18_908Z-debug.log

最後に助けてくれたのがこの記事！
https://qiita.com/eytyet/items/59c5bad1c167d5addc68

この後再度実行して無事にインストールできました！！