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package config
import (
"log/slog"
"maps"
"net/url"
"os"
"time"
"github.com/pelletier/go-toml/v2"
"github.com/pkg/errors"
)
var (
CommitSHA string
ShortSHA string
)
type URL struct {
*url.URL
}
func (u *URL) MarshalText() ([]byte, error) {
return []byte(u.URL.String()), nil
}
func (u *URL) UnmarshalText(text []byte) (err error) {
u.URL, err = url.Parse(string(text))
if err != nil {
return errors.WithMessagef(err, "could not parse URL %s", string(text))
}
return nil
}
type Duration struct {
time.Duration
}
func (d *Duration) MarshalText() ([]byte, error) {
return []byte(d.Duration.String()), nil
}
func (d *Duration) UnmarshalText(text []byte) (err error) {
d.Duration, err = time.ParseDuration(string(text))
if err != nil {
return errors.WithMessagef(err, "could not parse duration %s", string(text))
}
return nil
}
func mustURL(in string) (u URL) {
var err error
u.URL, err = url.Parse(in)
if err != nil {
panic(errors.Errorf("URL cannot be parsed: %s", in))
}
return u
}
// this type is necessary as nix's `fromTOML` doesn't support TOML date/time formats
type LocalTime struct {
toml.LocalTime
}
func (t *LocalTime) MarshalText() ([]byte, error) {
b, err := t.LocalTime.MarshalText()
if err != nil {
return nil, errors.WithMessage(err, "could not marshal time value")
}
return b, nil
}
func (t *LocalTime) UnmarshalText(in []byte) (err error) {
err = t.LocalTime.UnmarshalText(in)
if err != nil {
return errors.WithMessage(err, "could not parse time value")
}
return nil
}
func mustLocalTime(in string) (time LocalTime) {
err := time.UnmarshalText([]byte(in))
if err != nil {
panic(errors.Errorf("Could not parse time: %s", in))
}
return
}
var nixpkgs = Repository{
Type: GitHub,
Owner: "NixOS",
Repo: "nixpkgs",
}
var defaultConfig = Config{
DataPath: "./data",
Web: &Web{
ListenAddress: "localhost",
Port: 3000,
BaseURL: mustURL("http://localhost:3000"),
Environment: "development",
ContentSecurityPolicy: CSP{
DefaultSrc: []string{"'self'"},
},
Headers: map[string]string{
"x-content-type-options": "nosniff",
},
},
Importer: &Importer{
Timeout: Duration{30 * time.Minute},
UpdateAt: mustLocalTime("04:00:00"),
Sources: map[string]*Source{
"nixos": {
Name: "NixOS",
Key: "nixos",
Enable: true,
Importer: Options,
Fetcher: Channel,
Channel: "nixpkgs",
URL: "https://channels.nixos.org/nixos-unstable/nixexprs.tar.xz",
ImportPath: "nixos/release.nix",
Attribute: "options",
OutputPath: "share/doc/nixos",
Timeout: Duration{5 * time.Minute},
Repo: nixpkgs,
},
"darwin": {
Name: "Darwin",
Key: "darwin",
Enable: false,
Importer: Options,
Fetcher: Channel,
Channel: "darwin",
URL: "https://github.com/LnL7/nix-darwin/archive/master.tar.gz",
ImportPath: "release.nix",
Attribute: "options",
OutputPath: "share/doc/darwin",
Timeout: Duration{5 * time.Minute},
Repo: Repository{
Type: GitHub,
Owner: "LnL7",
Repo: "nix-darwin",
},
},
"home-manager": {
Name: "Home Manager",
Key: "home-manager",
Enable: false,
Importer: Options,
Channel: "home-manager",
URL: "https://github.com/nix-community/home-manager/archive/master.tar.gz",
Fetcher: Channel,
ImportPath: "default.nix",
Attribute: "docs.json",
OutputPath: "share/doc/home-manager",
Timeout: Duration{5 * time.Minute},
Repo: Repository{
Type: GitHub,
Owner: "nix-community",
Repo: "home-manager",
},
},
"nixpkgs": {
Name: "Nix Packages",
Key: "nixpkgs",
Enable: true,
Importer: Packages,
Fetcher: ChannelNixpkgs,
Channel: "nixos-unstable",
OutputPath: "packages.json.br",
Timeout: Duration{5 * time.Minute},
Repo: nixpkgs,
},
},
},
}
func GetDefaultConfig() string {
out, err := toml.Marshal(&defaultConfig)
if err != nil {
panic("could not read default configuration")
}
return string(out)
}
func GetConfig(filename string) (*Config, error) {
config := defaultConfig
if filename != "" {
slog.Debug("reading config", "filename", filename)
f, err := os.Open(filename)
if err != nil {
return nil, errors.Wrap(err, "reading config failed")
}
defer f.Close()
dec := toml.NewDecoder(f)
dec.DisallowUnknownFields()
err = dec.Decode(&config)
if err != nil {
var tomlError *toml.DecodeError
if errors.As(err, &tomlError) {
return nil, errors.WithMessage(err, tomlError.Error())
}
var missingConfigError *toml.StrictMissingError
if errors.As(err, &missingConfigError) {
return nil, errors.Errorf("unexpected config: %s", missingConfigError.String())
}
return nil, errors.Wrap(err, "config error")
}
}
maps.DeleteFunc(config.Importer.Sources, func(_ string, v *Source) bool {
return !v.Enable
})
return &config, nil
}
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