[horde] git install help

[Simon B]

Hi

It's been nearly 2 years, since the git repository was split, and I am
finally getting to trying to update my configuration...

Following these instructions...

https://github.com/horde/git-tools

I did this:
cp config/conf.php.dist config/conf.php

I did this:
 10 // Target directory for git checkouts.
 11 $conf['git_base'] = '/my/current/5.2/git/clone/';
 12
 13 // Target directory for installation, i.e. the webroot .
 14 $conf['web_base'] = '/my/current/git/webroot';
 15
 16 // Group name to use for the static directory. Should be the web
server's
 17 // group.
 18 $conf['static_group'] = 'www-data';

I tried to do this:
horde-git-tools --help

but I got this:
root at mail:/ /my/current/5.2/git/clone/horde-git-tools# bin/horde-git-tools
--help
You need to run "composer install" first.
For more information on composer see https://getcomposer.org/.

So, then I did this:
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') ===
'baf1608c33254d00611ac1705c1d9958c817a1a33bce370c0595974b342601bd80b92a3f46067da89e3b06bff421f182')
{ echo 'Installer verified'; } else { echo 'Installer corrupt';
unlink('composer-setup.php'); } echo PHP_EOL;" php composer-setup.php php
-r "unlink('composer-setup.php');"

But I still get this:
root at mail:/ /my/current/5.2/git/clone/horde-git-tools# bin/horde-git-tools
--help
You need to run "composer install" first.
For more information on composer see https://getcomposer.org/.

Is there a more step-by-step tutorial?

I do not use git on a regular basis, but a "rolling" installation of Horde
makes more sense for me.

Regards

Simon