Torjus Håkestad
408554b477
Implements Phase 2 of the automated deployment pipeline. This commit adds a Python CLI tool that automates the creation of NixOS host configurations, eliminating manual boilerplate and reducing errors. Features: - Python CLI using typer framework with rich terminal UI - Comprehensive validation (hostname format/uniqueness, IP subnet/uniqueness) - Jinja2 templates for NixOS configurations - Automatic updates to flake.nix and terraform/vms.tf - Support for both static IP and DHCP configurations - Dry-run mode for safe previews - Packaged as Nix derivation and added to devShell Usage: create-host --hostname myhost --ip 10.69.13.50/24 The tool generates: - hosts/<hostname>/default.nix - hosts/<hostname>/configuration.nix - Updates flake.nix with new nixosConfigurations entry - Updates terraform/vms.tf with new VM definition All generated configurations include full system imports (monitoring, SOPS, autoupgrade, etc.) and are validated with nix flake check and tofu validate. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
101 lines
2.7 KiB
Python
101 lines
2.7 KiB
Python
"""Text manipulation for flake.nix and Terraform files."""
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import re
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from pathlib import Path
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from models import HostConfig
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def update_flake_nix(config: HostConfig, repo_root: Path) -> None:
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"""
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Add new host entry to flake.nix nixosConfigurations.
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Args:
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config: Host configuration
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repo_root: Path to repository root
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"""
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flake_path = repo_root / "flake.nix"
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content = flake_path.read_text()
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# Find the closing of nixosConfigurations block
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# Pattern: " };\n packages ="
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pattern = r"( \};)\n( packages =)"
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# Create new entry
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new_entry = f""" {config.hostname} = nixpkgs.lib.nixosSystem {{
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inherit system;
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specialArgs = {{
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inherit inputs self sops-nix;
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}};
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modules = [
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(
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{{ config, pkgs, ... }}:
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{{
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nixpkgs.overlays = commonOverlays;
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}}
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)
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./hosts/{config.hostname}
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sops-nix.nixosModules.sops
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];
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}};
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"""
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# Insert new entry before closing brace
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replacement = rf"\g<1>\n{new_entry}\g<2>"
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new_content, count = re.subn(pattern, replacement, content)
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if count == 0:
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raise ValueError(
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"Could not find insertion point in flake.nix. "
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"Looking for pattern: ' };\\n devShells ='"
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)
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flake_path.write_text(new_content)
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def update_terraform_vms(config: HostConfig, repo_root: Path) -> None:
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"""
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Add new VM entry to terraform/vms.tf locals.vms map.
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Args:
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config: Host configuration
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repo_root: Path to repository root
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"""
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terraform_path = repo_root / "terraform" / "vms.tf"
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content = terraform_path.read_text()
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# Find the closing of locals.vms block
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# Pattern: " }\n\n # Compute VM configurations"
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pattern = r"( \})\n\n( # Compute VM configurations)"
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# Create new entry based on whether we have static IP or DHCP
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if config.is_static_ip:
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new_entry = f''' "{config.hostname}" = {{
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ip = "{config.ip}"
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cpu_cores = {config.cpu}
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memory = {config.memory}
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disk_size = "{config.disk}"
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}}
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'''
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else:
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new_entry = f''' "{config.hostname}" = {{
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cpu_cores = {config.cpu}
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memory = {config.memory}
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disk_size = "{config.disk}"
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}}
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'''
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# Insert new entry before closing brace
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replacement = rf"{new_entry}\g<1>\n\n\g<2>"
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new_content, count = re.subn(pattern, replacement, content)
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if count == 0:
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raise ValueError(
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"Could not find insertion point in terraform/vms.tf. "
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"Looking for pattern: ' }\\n\\n # Compute VM configurations'"
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)
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terraform_path.write_text(new_content)
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