Unable to self-update composer?

Question

I am trying to update composer with no luck!

What I have tried:

$ composer self-update

[InvalidArgumentException]

Answer 1

Install the latest version:

Remove your current composer version, for example ubuntu/debian:

sudo apt-get remove composer

Now, head to https://getcomposer.org/download/ and paste the script in your command line. This ensures that you get the latest version of composer (as time of writing: v2.0.7).

Like this:

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === 'c31c1e292ad7be5f49291169c0ac8f683499effffdcfd4e42232982d0fd193004208a58ff6f353fde0012d35fdd72bc394') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
sudo php composer-setup.php --install-dir=/usr/local/bin --filename=composer
php -r "unlink('composer-setup.php');"

after some time passed, you can update and no need to use sudo prefix:

composer self-update

Answer 2

As @Waqleh said, you have to uninstall composer and install it again. First execute:

sudo apt-get remove composer

Then, execute these commands. The checksum here is for Composer 1.10.13, but you'll get the newest Composer (2.0.4 at the moment of editing this answer) when running the first line, so be sure to check in https://getcomposer.org/download/:

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === '8a6138e2a05a8c28539c9f0fb361159823655d7ad2deecb371b04a83966c61223adc522b0189079e3e9e277cd72b8897') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

Now move composer.phar to a directory that is in your path (fom https://getcomposer.org/doc/00-intro.md#installation-linux-unix-osx):

sudo mv composer.phar /usr/local/bin/composer

And execute composer from any directory. That's all!

PS: If you're using PHPStorm (or maybe other IDE's) you'll have to close it and open again.

Answer 3

As per @JimL comment I was able to self update composer by:

• Uninstalling Composer from the package manager (apt).
• I installed it according to the official documentation

Now it works as expected.

Answer 4

you can specify installation directory and filename while setting up composer - php composer-setup.php like so:

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

Answer 5

I've installed brew and it saves me a lot. Install brew then brew install composer to install the composer.

Answer 6

Install the latest Composer by Following steps:

Uninstalling Composer

sudo apt-get remove composer

Run following commands

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === '8a6138e2a05a8c28539c9f0fb361159823655d7ad2deecb371b04a83966c61223adc522b0189079e3e9e277cd72b8897') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php

Install Composer in /usr/bin dir to run composer from anywhere

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

Remove the installer

php -r "unlink('composer-setup.php');"

To check or self update

composer self-update