initial implementation of install subcommand

[lexming]

Carries out a native installation of EESSI in localhost following the instructions in
https://www.eessi.io/docs/getting_access/native_installation/:

• installs CernVM-FS system-wide
• installs EESSI configuration
• makes client configuration
• runs setup

Supported Linux distros:

• RHEL-based
• Debina-based

Screencast_20260210_014947.webm

Note: root permissions are required for system-wide installations. Only those commands that need root are executed with sudo. User will only be prompted once for the password.

Coded with the assistance of a local AI model (devstral-small-2)

[boegel]

Tried this on Ubuntu 24.04 (LTS) with commit 5f11ec3, works fine with a small "issue" (see which command being run):

Details

$ cat /etc/os-release
PRETTY_NAME="Ubuntu 24.04.3 LTS"
NAME="Ubuntu"
VERSION_ID="24.04"
VERSION="24.04.3 LTS (Noble Numbat)"

$ eessi --version
eessi version 0.2.0

(venv) kehoste@lima-ubuntu2404-test:~/eessi-cli$ eessi install

🚀 Launching native EESSI installation...

EESSI requires the following components:
├── CernVM File System
├── configuration files of EESSI for CernVM-FS
├── client configuration files for CernVM-FS
└── EESSI repositories

🚨 The requested installation steps require executing commands as root
🔑 Enter your user password in this system::

🧩 Step 1 of 4: CernVM-FS

CernVM-FS not found. Do you want to install CernVM-FS in this system? [y/n]:
Please enter Y or N
CernVM-FS not found. Do you want to install CernVM-FS in this system? [y/n]: Y
🚨 The requested installation steps require executing commands as root
🔑 Enter your user password in this system::

📦 Installing CernVM-FS packages...
💥 Command failed: which yum || which dnf; Output: ; Error:
✅ Detected Debian-based distribution
✅ Downloaded https://cvmrepo.s3.cern.ch/cvmrepo/apt/cvmfs-release-latest_all.deb
✅ dpkg -i cvmfs-release-latest_all.deb
✅ apt update
✅ apt install -y cvmfs
🎉 CernVM-FS installed successfully

🧩 Step 2 of 4: EESSI configuration for CernVM-FS

EESSI configuration not found. Do you want to install it in this system? [y/n]: Y
🚨 The requested installation steps require executing commands as root
🔑 Enter your user password in this system::

📦 Installing EESSI configuration for CernVM-FS...
💥 Command failed: which yum || which dnf; Output: ; Error:
✅ Detected Debian-based distribution
✅ Downloaded https://github.com/EESSI/filesystem-layer/releases/download/latest/cvmfs-config-eessi_latest_all.deb
✅ dpkg -i cvmfs-config-eessi_latest_all.deb
🎉 EESSI configuration for CernVM-FS installed successfully

🧩 Step 3 of 4: client configuration for CernVM-FS

CernVM-FS client configuration not found. Do you want to install it in this system? [y/n]: Y
🚨 The requested installation steps require executing commands as root
🔑 Enter your user password in this system::
📦 Creating client configuration file...
✅ Configuration parameters added to temporary file
✅ cp /tmp/tmpxhejuqdg /etc/cvmfs/default.local
🎉 Client configuration file created at /etc/cvmfs/default.local

🧩 Step 4 of 4: EESSI repositories

📦 Running cvmfs_config setup to configure EESSI repositories...
✅ cvmfs_config setup
✅ EESSI repositories configured successfully

🏁 Native EESSI installation completed successfully!

You can now use EESSI by running 'eessi init' or 'eessi shell'

(venv) kehoste@lima-ubuntu2404-test:~/eessi-cli$ eessi check
📦 Checking for EESSI repositories...
    ✅ OK /cvmfs/dev.eessi.io is available
    ✅ OK /cvmfs/riscv.eessi.io is available
    ✅ OK /cvmfs/software.eessi.io is available

🔎 Inspecting EESSI repository software.eessi.io...
    ✅ OK /cvmfs/software.eessi.io is available
    ℹ Revision (client): 14330
    💻 Client cache:
        ℹ Path to client cache directory: /var/lib/cvmfs/shared
        ℹ Shared cache: yes
        ℹ Client cache quota limit: 9.765625 GiB
        ℹ Cache Usage:  285k / 10240000k
        ✅ OK Number of cache cleanups in last 24h: 0
    🌍 Server/proxy settings:
        ℹ List of Stratum-1 mirror servers:
            http://aws-eu-central-s1.eessi.science/cvmfs/software.eessi.io
            http://azure-us-east-s1.eessi.science/cvmfs/software.eessi.io
        ℹ Proxy servers:
            auto
            DIRECT
        ℹ GeoAPI enabled: yes
    💁 Other:
        ℹ Client profile: single

[lexming]

Great, I fixed that and made some other improvements:

• add option --client-profile to install subcommand
• use temp directory to download and install .deb packages with dpkg
• streamline package manager detection and ignore errors on related commands
• avoid re-asking the sudo password whenever and empty password is given