Introduce server.toml

[cb341]

Server config 🥰

$ car rs config
Actions regarding server configuration

Usage: server config <COMMAND>

Commands:
  init      Initialize config file with default settings
  show      Show currently applied configuration
  defaults  Show defaults
  help      Print this message or the help of the given subcommand(s)

Options:
  -h, --help  Print help

Allows setting partial configs:

# server.toml
[world]
backups_dir = "/dev/null"

Defaults:

[world]
backups_dir = "backups/"
worlds_dir = "worlds/"
world_extension = ".rsmcw"
world_save_interval_seconds = 30
world_backup_interval_seconds = 180
spawn_area_distance = [4, 3, 4]

[generator.height]
splines = [[-1.0, 4.0], [0.0, 0.0], [0.0, 0.0], [0.05, 20.0], [1.0, 35.0]]

[generator.height.noise]
octaves = 4
height = 0.0
lacuranity = 2.0
frequency = 0.0033333333333333335
amplitude = 30.0
persistence = 0.5

[generator.height_adjust.noise]
octaves = 4
height = 0.0
lacuranity = 2.0
frequency = 0.008333333333333333
amplitude = 30.0
persistence = 0.5

[generator.density]
squash_factor = 0.01
height_offset = -20.0

[generator.density.noise]
octaves = 4
height = 0.0
lacuranity = 2.0
frequency = 0.016666666666666666
amplitude = 10.0
persistence = 0.5

[generator.cave]
base_value = 0.0
threshold = 0.25

[generator.cave.noise]
octaves = 2
height = 0.0
lacuranity = 0.03
frequency = 0.05
amplitude = 30.0
persistence = 0.59

[generator.tree]
spawn_attempts_per_chunk = 500
min_stump_height = 2
max_stump_height = 20
min_bush_radius = 3
max_bush_radius = 5

[generator.grass]
frequency = 10

Error handling

Invalid TOML

$ car rs config show
Could not parse config file at 'server.toml'
Err: TOML parse error at line 9, column 18
  |
9 | [generator.height
  |                  ^
unclosed table, expected `]`

Invalid Field

$ car rs config show
Could not parse config file at 'server.toml'
Err: TOML parse error at line 8, column 1
  |
8 | foo_bar = "676767"
  | ^^^^^^^
unknown field `foo_bar`, expected one of `backups_dir`, `worlds_dir`, `world_extension`, `world_save_interval_seconds`, `world_backup_interval_seconds`, `spawn_area_distance`