Lycolog

<script src="https://unpkg.com/prismjs@1.28.0/components/prism-core.min.js"></script>
<script src="https://unpkg.com/prismjs@1.28.0/plugins/autoloader/prism-autoloader.min.js"></script>
<script src="https://unpkg.com/prismjs@1.28.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
<script src="https://unpkg.com/prismjs@1.28.0/plugins/toolbar/prism-toolbar.min.js"></script>
<script src="https://unpkg.com/prismjs@1.28.0/plugins/copy-to-clipboard/prism-copy-to-clipboard.min.js"></script>
<script>
  document.addEventListener('DOMContentLoaded', () => {
    document.querySelectorAll('pre > code').forEach((codeEl) => {
      codeEl.className = codeEl.className === '' ? 'language-none' : codeEl.className;
      codeEl.className = codeEl.className.replace(/^sh$/, 'shell');
      codeEl.parentNode.className = 'line-numbers';
    });

    window.Prism.highlightAll();
  });
</script>

pacman -Syuu
# 一回落ちるのでもう一度起動して
pacman -Syuu

pacman -sS unzip
pacman -S --noconfirm unzip
pacman -sS diffutils
pacman -S --noconfirm diffutils
pacman -sS dnsutils
pacman -S --noconfirm dnsutils
pacman -sS openssh
pacman -S --noconfirm openssh
pacman -sS patch
pacman -S --noconfirm patch
pacman -sS perl
pacman -S --noconfirm perl
pacman -sS zsh
pacman -S --noconfirm zsh
pacman -sS git
pacman -S --noconfirm git
# prompt用に退避させる
mv /usr/bin/git /usr/bin/msys2_git

{
  "defaultProfile": "{17da3cac-b318-431e-8a3e-7fcdefe6d114}",
  "profiles": {
    "defaults": {},
    "list": [
      {
        "commandline": "C:/env/msys64/msys2_shell.cmd -defterm -here -use-full-path -no-start -msys -shell zsh",
        "font": {
          "face": "Consolas",
          "size": 11
        },
        "guid": "{17da3cac-b318-431e-8a3e-7fcdefe6d114}",
        "icon": "C:/env/msys64/mingw64.ico",
        "name": "MINGW64 / MSYS2",
        "colorScheme": "VSCode"
      }
    ]
  },
  "schemes": [
    {
      "name": "VSCode",
      "background": "#1e1e1e",
      "foreground": "#d4d4d4",
      "black": "#000000",
      "blue": "#2472c8",
      "brightBlack": "#666666",
      "brightBlue": "#3b8eea",
      "brightCyan": "#29b8db",
      "brightGreen": "#23d18b",
      "brightPurple": "#d670d6",
      "brightRed": "#f14c4c",
      "brightWhite": "#e5e5e5",
      "brightYellow": "#f5f543",
      "cyan": "#11a8cd",
      "green": "#0dbc79",
      "purple": "#bc3fbc",
      "red": "#cd3131",
      "white": "#e5e5e5",
      "yellow": "#e5e510"
    }
  ]
}

type HogePiyo = 'hoge' | 'piyo';

type InputProps<ValueT> = {
  value: ValueT;
  error: string;
};

const required = (val: string) => {
  return val === '';
};

const registerHogePiyo = (value: HogePiyo) => {
  console.log('register', value);
};

const input: InputProps<HogePiyo | ''> = {
  value: '',
  error: '',
};

if (required(input.value)) {
  input.error = 'ERR';
  console.error(input.error);
} else {
  // ここでは input.value は 'hoge' | 'piyo' となるはずだが
  // TSC は 'hoge' | 'piyo' | '' と解釈する
  registerHogePiyo(input.value);
}

type HogePiyo = 'hoge' | 'piyo';

type InputProps<ValueT> = {
  value: ValueT;
  error: string;
  hasError: boolean;
};

const required = <ValueT>(obj: InputProps<ValueT | ''>) => {
  if (obj.value === '') {
    return { value: '', error: '必須入力です', hasError: true };
  } else {
    return { value: obj.value, error: '', hasError: false };
  }
};

const registerHogePiyo = (value: HogePiyo) => {
  console.log('register', value);
};

const input: InputProps<HogePiyo | ''> = {
  value: '',
  error: '',
  hasError: false,
};

const result = required(input);
if (result.hasError) {
  console.error(result.error);
} else {
  // ここでは input.value は 'hoge' | 'piyo' となるはずだが
  // TSC は 'hoge' | 'piyo' | '' と解釈する
  registerHogePiyo(result.value);
}

export {};

type HogePiyo = 'hoge' | 'piyo';

type InputProps<ValueT> = {
  value: ValueT;
  error: string;
  hasError: boolean;
};

const required = <ValueT>(obj: InputProps<ValueT | ''>) => {
  if (obj.value === '') {
    return { value: '', error: '必須入力です', hasError: true } as {
      value: '';
      error: string;
      hasError: true;
    };
  } else {
    return { value: obj.value, error: '', hasError: false } as {
      value: ValueT;
      error: string;
      hasError: false;
    };
  }
};

const registerHogePiyo = (value: HogePiyo) => {
  console.log('register', value);
};

const input: InputProps<HogePiyo | ''> = {
  value: '',
  error: '',
  hasError: false,
};

const result = required(input);
if (result.hasError) {
  console.error(input.error);
} else {
  registerHogePiyo(result.value);
}

export {};