Feature: Fix composer version between deploys

[downace]

Currently deploy:vendors uses bin/composer option which downloads the latest Composer binary on every deploy. This can lead to unexpected breaking changes. For example, 1.10.0 started to output a lot of deprecation warnings in my case

There are lots of easy workarounds (override bin/composer option, use pre-installed Composer, etc.). But it would be nice to just add something like set('composer_version', '1.9.3'). Or just save composer binary somewhere between deploys (maybe in .dep dir)

[asafov]

As i see - master branch first try to find composer binary.

set('bin/composer', function () {
    if (commandExist('composer')) {
        $composer = '{{bin/php}} ' . locateBinaryPath('composer');
    }

    if (empty($composer)) {
        run("cd {{release_path}} && curl -sS https://getcomposer.org/installer | {{bin/php}}");
        $composer = '{{bin/php}} {{release_path}}/composer.phar';
    }

    return $composer;
});

Try to set it:
set('bin/composer', 'your_composer_path');

[asafov]

PR #2110 ready

[antonmedv]

Fixed! Now composer will be saved!