@ledsun blog

Hのキーがhellで、Sのキーがslaveだ、と彼は思った。そしてYのキーがyouだ。

WSLのUbuntu 20.04にPHPのcomposerをインストールする

comporserのインストール

curl -sS https://getcomposer.org/installer -o /tmp/composer-setup.php
php /tmp/composer-setup.php

実行したディレクトリにcomposer.pharができます。 php ~/composer.phar installとかphp ~/composer.phar updateで実行できました。

ubuntuでのComposerインストール方法を簡潔に - Qiita

$ # PHP と同じディレクトリに拡張子なしで移動し、実行権限を与える
$ mv ./composer.phar $(dirname $(which php))/composer && chmod +x "$_"

手動で、パスの通ったディレクトリに置く作法なんですか・・・?

How To Install and Use Composer on Ubuntu 20.04 | DigitalOcean

sudo php /tmp/composer-setup.php --install-dir=/usr/local/bin --filename=composer

インストール時にインストール先と名前が指定できるみたいです。

依存ライブラリのインストール

composer コマンドの実行時に次のエラーがでることがあります。

ledsun@MSI:~/►php ~/composer.phar update
PHP Warning:  PHP Startup: Unable to load dynamic library 'curl' (tried: /usr/lib/php/20210902/curl (/usr/lib/php/20210902/curl: cannot open shared object file: No such file or directory), /usr/lib/php/20210902/curl.so (/usr/lib/php/20210902/curl.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
Composer is operating significantly slower than normal because you do not have the PHP curl extension enabled.
Loading composer repositories with package information
sudo apt install php8.1-curl

します。 次のエラーが出たときは

ledsun@MSI:~/►php ~/composer.phar update
PHP Warning:  Module "curl" is already loaded in Unknown on line 0
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - phpunit/phpunit[9.5.10, ..., 9.5.x-dev] require ext-dom * -> it is missing from your system. Install or enable PHP's dom extension.
    - Root composer.json requires phpunit/phpunit ^9.5.10 -> satisfiable by phpunit/phpunit[9.5.10, ..., 9.5.x-dev].

To enable extensions, verify that they are enabled in your .ini files:
    - /etc/php/8.1/cli/php.ini
    - /etc/php/8.1/cli/conf.d/10-opcache.ini
    - /etc/php/8.1/cli/conf.d/10-pdo.ini
    - /etc/php/8.1/cli/conf.d/20-calendar.ini
    - /etc/php/8.1/cli/conf.d/20-ctype.ini
    - /etc/php/8.1/cli/conf.d/20-curl.ini
    - /etc/php/8.1/cli/conf.d/20-exif.ini
    - /etc/php/8.1/cli/conf.d/20-ffi.ini
    - /etc/php/8.1/cli/conf.d/20-fileinfo.ini
    - /etc/php/8.1/cli/conf.d/20-ftp.ini
    - /etc/php/8.1/cli/conf.d/20-gettext.ini
    - /etc/php/8.1/cli/conf.d/20-iconv.ini
    - /etc/php/8.1/cli/conf.d/20-phar.ini
    - /etc/php/8.1/cli/conf.d/20-posix.ini
    - /etc/php/8.1/cli/conf.d/20-readline.ini
    - /etc/php/8.1/cli/conf.d/20-shmop.ini
    - /etc/php/8.1/cli/conf.d/20-sockets.ini
    - /etc/php/8.1/cli/conf.d/20-sysvmsg.ini
    - /etc/php/8.1/cli/conf.d/20-sysvsem.ini
    - /etc/php/8.1/cli/conf.d/20-sysvshm.ini
    - /etc/php/8.1/cli/conf.d/20-tokenizer.ini
You can also run `php --ini` in a terminal to see which files are used by PHP in CLI mode.
Alternatively, you can run Composer with `--ignore-platform-req=ext-dom` to temporarily ignore these required extensions.
sudo apt install php8.1-dom

します。