I am trying to run my laravel app on docker. Its an old app I am trying to resurface and was built on php 7.1

Locally, it works fine.

On Docker, I used the following config:

FROM php:7.1-fpm-alpine

RUN docker-php-ext-install pdo pdo_mysql sockets
RUN curl -sS https://getcomposer.org/installer​ | php -- \
     --install-dir=/usr/local/bin --filename=composer

COPY --from=composer:latest /usr/bin/composer /usr/bin/composer

WORKDIR /app
COPY . .
RUN composer install

Its not allowing me to install composer and gives the following error:

[stage-0 7/7] RUN composer install: #0 0.221 Composer 2.3.0 dropped support for PHP <7.2.5 and you are running 7.1.33, please upgrade PHP or use Composer 2.2 LTS via "composer self-update --2.2". Aborting.

I tried doing RUN composer self-update --2.2 instead but its the same error.

Can anyone tell me how to go install this specific version of composer on docker.

Thank you

CodePudding user response：

All composer releases are accessible via their GitHub repository, including the composer.phar binary archive files. Instead of instaling the latest version from getcomposer.org, just use a version that works with your PHP version.

The composer.phar for composer 2.2.9 can be found here: https://github.com/composer/composer/releases/tag/2.2.9

CodePudding user response：

Composer installer permit to choose the version:

1. Get the installer

   php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
   php -r "if (hash_file('sha384', 'composer-setup.php') === '55ce33d7678c5a611085589f1f3ddf8b3c52d662cd01d4ba75c0ee0459970c2200a51f492d557530c71c15d8dba01eae') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
   

   or use cURL to get the installer.

2. Install version

   php composer-setup.php --2.2
   

See https://getcomposer.org/download/