cluster: make domain, basedir and cluster name public fields

Signed-off-by: Alejandro Mery <amery@jpi.io>

.vscode/settings.json

@@ -1,12 +1,9 @@
 {
     "cSpell.words": [
-        "asciigoat",
         "ceph",
-        "cyclomatic",
         "darvaza",
         "gofrs",
         "jpictl",
-        "Wrapf",
         "zerolog"
     ]
 }

cmd/jpictl/config.go

@@ -1,25 +1,11 @@
 package main
 
-import (
-	"os"
-
-	"darvaza.org/core"
-
-	"git.jpi.io/amery/jpictl/pkg/cluster"
-)
-
-const (
-	// DefaultConfigFile is read if -f/--config-file isn't specified.
-	// If it doesn't exist, m/ will be scanned
-	DefaultConfigFile = "cloud.yaml"
-)
+import "git.jpi.io/amery/jpictl/pkg/cluster"
 
 // Config describes the repository
 type Config struct {
 	Base   string
 	Domain string
-
-	ConfigFile string
 }
 
 var cfg = &Config{
@@ -28,32 +14,9 @@ var cfg = &Config{
 }
 
 // LoadZones loads all zones and machines in the config directory
-// or file
 func (cfg *Config) LoadZones(resolve bool) (*cluster.Cluster, error) {
-	// try config file first
-	zones, err := cluster.NewFromConfig(cfg.ConfigFile,
-		cluster.ResolvePublicAddresses(resolve),
-		cluster.WithLogger(log),
-	)
-
-	switch {
-	case err == nil:
-		// file was good
-		return zones, nil
-	case !os.IsNotExist(err) || cfg.ConfigFile != DefaultConfigFile:
-		// file was bad
-		return nil, core.Wrapf(err, "NewFromConfig(%q)", cfg.ConfigFile)
-	}
-
-	// default file doesn't exist. scan instead.
 	return cluster.NewFromDirectory(cfg.Base, cfg.Domain,
 		cluster.ResolvePublicAddresses(resolve),
 		cluster.WithLogger(log),
 	)
 }
-
-func init() {
-	rootCmd.PersistentFlags().
-		StringVarP(&cfg.ConfigFile, "config-file", "f",
-			DefaultConfigFile, "config file (JSON or YAML)")
-}

cmd/jpictl/dump.go

@@ -45,9 +45,8 @@ const encoding = YAMLEncoding
 
 // Command
 var dumpCmd = &cobra.Command{
-	Use:    "dump",
-	Short:  "generates a text representation of the config",
-	PreRun: setVerbosity,
+	Use:   "dump",
+	Short: "generates a text representation of the config",
 	RunE: func(_ *cobra.Command, _ []string) error {
 		var buf bytes.Buffer
 		var enc Encoder

cmd/jpictl/env.go

@@ -8,9 +8,8 @@ import (
 
 // Command
 var envCmd = &cobra.Command{
-	Use:    "env",
-	Short:  "generates environment variables for shell scripts",
-	PreRun: setVerbosity,
+	Use:   "env",
+	Short: "generates environment variables for shell scripts",
 	RunE: func(_ *cobra.Command, _ []string) error {
 		m, err := cfg.LoadZones(false)
 		if err != nil {

cmd/jpictl/gateway.go

@@ -20,9 +20,8 @@ var gatewayCmd = &cobra.Command{
 
 // gateway set
 var gatewaySetCmd = &cobra.Command{
-	Use:    "set",
-	Short:  "gateway set sets machines as gateways",
-	PreRun: setVerbosity,
+	Use:   "set",
+	Short: "gateway set sets machines as gateways",
 	RunE: func(_ *cobra.Command, args []string) error {
 		m, err := cfg.LoadZones(false)
 		if err != nil {

cmd/jpictl/log.go

@@ -3,9 +3,15 @@ package main
 import (
 	"fmt"
 
+	"darvaza.org/sidecar/pkg/logger/zerolog"
 	"darvaza.org/slog"
 )
 
+// TODO: make log level configurable via flags
+var (
+	log = zerolog.New(nil, slog.Debug)
+)
+
 // fatal is a convenience wrapper for slog.Logger.Fatal().Print()
 func fatal(err error, msg string, args ...any) {
 	l := log.Fatal()

cmd/jpictl/main.go

@@ -2,8 +2,6 @@
 package main
 
 import (
-	"darvaza.org/sidecar/pkg/logger/zerolog"
-	"darvaza.org/slog"
 	"github.com/spf13/cobra"
 )
 
@@ -12,30 +10,13 @@ const (
 	CmdName = "jpictl"
 )
 
-var (
-	log       = zerolog.New(nil, slog.Error)
-	verbosity int
-	rootCmd   = &cobra.Command{
-		Use:   CmdName,
-		Short: "control tool for jpi.cloud",
-	}
-)
+var rootCmd = &cobra.Command{
+	Use:   CmdName,
+	Short: "control tool for jpi.cloud",
+}
 
 func main() {
 	if err := rootCmd.Execute(); err != nil {
 		fatal(err, "")
 	}
 }
-
-func init() {
-	rootCmd.PersistentFlags().CountVarP(&verbosity, "verbosity", "v",
-		"increase the verbosity level to Warn, Info or Debug")
-}
-
-func setVerbosity(_ *cobra.Command, _ []string) {
-	desired := int8(slog.Error) + int8(verbosity)
-	if desired > 6 {
-		desired = 6
-	}
-	log = zerolog.New(nil, slog.LogLevel(desired))
-}

cmd/jpictl/write.go

@@ -6,9 +6,8 @@ import (
 
 // Command
 var writeCmd = &cobra.Command{
-	Use:    "write",
-	Short:  "rewrites all config files",
-	PreRun: setVerbosity,
+	Use:   "write",
+	Short: "rewrites all config files",
 	RunE: func(_ *cobra.Command, _ []string) error {
 		m, err := cfg.LoadZones(false)
 		if err != nil {

go.mod

@@ -14,7 +14,6 @@ require (
 	github.com/mgechev/revive v1.3.3
 	github.com/spf13/cobra v1.7.0
 	golang.org/x/crypto v0.12.0
-	gopkg.in/gcfg.v1 v1.2.3
 	gopkg.in/yaml.v3 v3.0.1
 )
 
@@ -43,5 +42,4 @@ require (
 	golang.org/x/sys v0.12.0 // indirect
 	golang.org/x/text v0.13.0 // indirect
 	golang.org/x/tools v0.12.0 // indirect
-	gopkg.in/warnings.v0 v0.1.2 // indirect
 )

go.sum

@@ -98,10 +98,6 @@ golang.org/x/tools v0.12.0 h1:YW6HUoUmYBpwSgyaGaZq1fHjrBjX1rlpZ54T6mu2kss=
 golang.org/x/tools v0.12.0/go.mod h1:Sc0INKfu04TlqNoRA1hgpFZbhYXHPr4V5DzpSBTPqQM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/gcfg.v1 v1.2.3 h1:m8OOJ4ccYHnx2f4gQwpno8nAX5OGOh7RLaaz0pj3Ogs=
-gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
-gopkg.in/warnings.v0 v0.1.2 h1:wFXVbFY8DY5/xOe1ECiWdKCzZlxgshcYVNkBHstARME=
-gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/cluster/ceph_scan.go

@@ -71,7 +71,7 @@ func newCephScanTODO(cfg *ceph.Config) *cephScanTODO {
 	return todo
 }
 
-func (m *Cluster) scanCephMonitors(opts *ScanOptions) error {
+func (m *Cluster) scanCephMonitors(_ *ScanOptions) error {
 	cfg, err := m.GetCephConfig()
 	switch {
 	case os.IsNotExist(err):
@@ -94,10 +94,6 @@ func (m *Cluster) scanCephMonitors(opts *ScanOptions) error {
 		todo.LogMissing(m.log)
 	}
 
-	return m.initCephMonitors(opts)
-}
-
-func (m *Cluster) initCephMonitors(_ *ScanOptions) error {
 	// make sure every zone has one
 	m.ForEachZone(func(z *Zone) bool {
 		_ = z.GetCephMonitors()

pkg/cluster/cluster.go

@@ -27,8 +27,7 @@ type Cluster struct {
 	Domain  string `json:"domain,omitempty" yaml:"domain,omitempty"`
 
 	CephFSID uuid.UUID `json:"ceph_fsid,omitempty" yaml:"ceph_fsid,omitempty"`
-	Regions  []Region  `json:",omitempty"          yaml:",omitempty"`
-	Zones    []*Zone   `json:",omitempty"          yaml:",omitempty"`
+	Zones    []*Zone   `json:"zones,omitempty"     yaml:"zones,omitempty"`
 }
 
 // revive:enable:line-length-limit

pkg/cluster/cluster_fs.go

@@ -1,25 +0,0 @@
-package cluster
-
-import (
-	"io/fs"
-	"path/filepath"
-
-	"github.com/hack-pad/hackpadfs/os"
-)
-
-// DirFS returns a file system (an [fs.FS]) for the tree
-// of files rooted at the directory dir.
-func DirFS(dir string) (fs.FS, error) {
-	dir = filepath.Clean(dir)
-	fullPath, err := filepath.Abs(dir)
-	if err != nil {
-		return nil, err
-	}
-
-	sub, err := os.NewFS().Sub(fullPath[1:])
-	if err != nil {
-		return nil, err
-	}
-
-	return sub, nil
-}

pkg/cluster/cluster_import.go

@@ -1,139 +0,0 @@
-package cluster
-
-import (
-	"encoding/json"
-	"fmt"
-	"os"
-
-	"gopkg.in/yaml.v3"
-)
-
-func (m *Cluster) init(opts *ScanOptions) error {
-	for _, fn := range []func(*ScanOptions) error{
-		m.initZones,
-		m.scanZoneIDs,
-		m.scanSort,
-		m.scanGateways,
-		m.initCephMonitors,
-		m.initRegions,
-	} {
-		if err := fn(opts); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (m *Cluster) initZones(opts *ScanOptions) error {
-	var err error
-
-	sub, err := DirFS(m.BaseDir)
-	if err != nil {
-		return err
-	}
-
-	m.dir = sub
-
-	m.ForEachZone(func(z *Zone) bool {
-		err = m.initZone(z, opts)
-		return err != nil
-	})
-
-	return err
-}
-
-func (m *Cluster) initZone(z *Zone, _ *ScanOptions) error {
-	var hasMissing bool
-	var lastMachineID int
-
-	z.zones = m
-	z.logger = m
-
-	z.ForEachMachine(func(p *Machine) bool {
-		p.zone = z
-		p.logger = z
-
-		switch {
-		case p.ID == 0:
-			hasMissing = true
-		case p.ID > lastMachineID:
-			lastMachineID = z.ID
-		}
-
-		return false
-	})
-
-	if hasMissing {
-		next := lastMachineID + 1
-
-		z.ForEachMachine(func(p *Machine) bool {
-			if p.ID == 0 {
-				p.ID, next = next, next+1
-			}
-
-			return false
-		})
-	}
-
-	z.ForEachMachine(func(p *Machine) bool {
-		p.Name = fmt.Sprintf("%s-%v", z.Name, p.ID)
-		return false
-	})
-
-	return nil
-}
-
-func decodeConfigData(data []byte) (out *Cluster, err error) {
-	// try JSON first
-	out = new(Cluster)
-	err = json.Unmarshal(data, out)
-	if err == nil {
-		// good json
-		return out, nil
-	} else if _, ok := err.(*json.SyntaxError); !ok {
-		// bad json
-		return nil, err
-	}
-
-	out = new(Cluster)
-	err = yaml.Unmarshal(data, out)
-	if err != nil {
-		// bad yaml too
-		return nil, err
-	}
-
-	// good yaml
-	return out, nil
-}
-
-// NewFromConfig loads the cluster data from the given file
-func NewFromConfig(filename string, opts ...ScanOption) (*Cluster, error) {
-	var scanOptions ScanOptions
-
-	data, err := os.ReadFile(filename)
-	if err != nil {
-		return nil, err
-	}
-
-	m, err := decodeConfigData(data)
-	if err != nil {
-		return nil, err
-	}
-
-	for _, opt := range opts {
-		if err = opt(m, &scanOptions); err != nil {
-			return nil, err
-		}
-	}
-
-	if err = m.setScanDefaults(&scanOptions); err != nil {
-		return nil, err
-	}
-
-	if err := m.init(&scanOptions); err != nil {
-		return nil, err
-	}
-
-	return m, nil
-}

pkg/cluster/cluster_scan_options.go

@@ -6,6 +6,7 @@ import (
 
 	"darvaza.org/resolver"
 	"darvaza.org/slog"
+	"github.com/hack-pad/hackpadfs/os"
 )
 
 // A ScanOption pre-configures the Zones before scanning
@@ -100,7 +101,7 @@ func NewFromDirectory(dir, domain string, opts ...ScanOption) (*Cluster, error)
 		return nil, err
 	}
 
-	sub, err := DirFS(dir)
+	sub, err := os.NewFS().Sub(fullPath[1:])
 	if err != nil {
 		return nil, err
 	}

pkg/cluster/hosts.go

@@ -1,128 +0,0 @@
-package cluster
-
-import (
-	"bytes"
-	"fmt"
-	"strings"
-	"text/template"
-)
-
-type hostsFile struct {
-	Ring0 []hostsEntry
-	Ring1 []hostsEntry
-}
-
-type hostsEntry struct {
-	Addr  string
-	Names []string
-}
-
-var hostsTemplate = template.Must(template.New("hosts").Funcs(template.FuncMap{
-	"StringsJoin": strings.Join,
-}).Parse(`127.0.0.1 localhost
-
-# The following lines are desirable for IPv6 capable hosts
-::1     ip6-localhost ip6-loopback
-fe00::0 ip6-localnet
-ff00::0 ip6-mcastprefix
-ff02::1 ip6-allnodes
-ff02::2 ip6-allrouters
-ff02::3 ip6-allhosts
-
-{{range .Ring1 -}}
-{{.Addr}}  {{StringsJoin .Names " "}}
-{{end}}
-{{range .Ring0 -}}
-{{.Addr}}  {{StringsJoin .Names " "}}
-{{end -}}
-`))
-
-// WriteHosts rewrites all hosts files on the tree
-func (m *Cluster) WriteHosts() error {
-	var err error
-
-	m.ForEachZone(func(z *Zone) bool {
-		err = z.WriteHosts()
-		return err != nil
-	})
-
-	return err
-}
-
-// WriteHosts rewrites all hosts files in the zone
-func (z *Zone) WriteHosts() error {
-	var err error
-
-	s := z.Hosts()
-	z.ForEachMachine(func(p *Machine) bool {
-		err = p.WriteStringFile(s, "hosts")
-		return err != nil
-	})
-
-	return err
-}
-
-// WriteHosts rewrites the hosts file
-func (p *Machine) WriteHosts() error {
-	s := p.zone.Hosts()
-	return p.WriteStringFile(s, "hosts")
-}
-
-func (z *Zone) genHosts(out *hostsFile, p *Machine) {
-	var names []string
-
-	ip, _ := RingOneAddress(p.zone.ID, p.ID)
-	names = append(names, p.Name)
-
-	if p.CephMonitor {
-		names = append(names, fmt.Sprintf("%s-%s", p.zone.Name, "ceph"))
-		names = append(names, fmt.Sprintf("%s-%s", p.zone.Name, "k3s"))
-
-		if z.ID == p.zone.ID {
-			names = append(names, "ceph")
-			names = append(names, "k3s")
-		}
-	}
-
-	entry := hostsEntry{
-		Addr:  ip.String(),
-		Names: names,
-	}
-
-	out.Ring1 = append(out.Ring1, entry)
-
-	if p.IsGateway() {
-		var s string
-
-		ip, _ = RingZeroAddress(p.zone.ID, p.ID)
-		s = fmt.Sprintf("%s-%v", p.Name, 0)
-
-		entry = hostsEntry{
-			Addr:  ip.String(),
-			Names: []string{s},
-		}
-
-		out.Ring0 = append(out.Ring0, entry)
-	}
-}
-
-// Hosts renders the /etc/hosts to be used on this zone
-func (z *Zone) Hosts() string {
-	var buf bytes.Buffer
-	var out hostsFile
-
-	z.zones.ForEachZone(func(z2 *Zone) bool {
-		z2.ForEachMachine(func(p *Machine) bool {
-			z.genHosts(&out, p)
-
-			return false
-		})
-		return false
-	})
-
-	if err := hostsTemplate.Execute(&buf, &out); err != nil {
-		panic(err)
-	}
-
-	return buf.String()
-}

pkg/cluster/regions.go

@@ -1,88 +0,0 @@
-package cluster
-
-// Region represents a group of zones geographically related
-type Region struct {
-	m     *Cluster
-	zones []*Zone
-
-	Name    string
-	Regions []string `json:",omitempty" yaml:",omitempty"`
-}
-
-func (m *Cluster) initRegions(_ *ScanOptions) error {
-	regions := make(map[string][]*Zone)
-
-	// first regions defined by zones
-	m.ForEachZone(func(z *Zone) bool {
-		for _, region := range z.Regions {
-			regions[region] = append(regions[region], z)
-		}
-
-		return false
-	})
-
-	// bind first level regions and their zones
-	for name, zones := range regions {
-		m.syncRegions(name, zones...)
-	}
-
-	// and combine zones to produce larger regions
-	for i := range m.Regions {
-		r := &m.Regions[i]
-		m.finishRegion(r)
-	}
-
-	return nil
-}
-
-func (m *Cluster) syncRegions(name string, zones ...*Zone) {
-	for _, r := range m.Regions {
-		if r.Name == name {
-			// found
-			r.m = m
-			r.zones = zones
-			return
-		}
-	}
-
-	// new
-	m.Regions = append(m.Regions, Region{
-		m:     m,
-		zones: zones,
-		Name:  name,
-	})
-}
-
-func (m *Cluster) finishRegion(r *Region) {
-	if r.m != nil {
-		// ready
-		return
-	}
-
-	r.m = m
-	sub := []string{}
-	for _, name := range r.Regions {
-		r2, ok := m.getRegion(name)
-		if !ok {
-			m.warn(nil).WithField("region", name).Print("unknown region")
-			continue
-		}
-
-		sub = append(sub, r2.Name)
-		r.zones = append(r.zones, r2.zones...)
-	}
-	r.Regions = sub
-}
-
-func (m *Cluster) getRegion(name string) (*Region, bool) {
-	for i := range m.Regions {
-		r := &m.Regions[i]
-
-		if name == r.Name {
-			m.finishRegion(r)
-			return r, true
-		}
-	}
-
-	return nil, false
-}

pkg/cluster/sync.go

@@ -5,7 +5,6 @@ func (m *Cluster) SyncAll() error {
 	for _, fn := range []func() error{
 		m.SyncAllWireguard,
 		m.SyncAllCeph,
-		m.WriteHosts,
 	} {
 		if err := fn(); err != nil {
 			return err

pkg/cluster/zones.go

@@ -19,9 +19,8 @@ type Zone struct {
 	zones  *Cluster
 	logger `json:"-" yaml:"-"`
 
-	ID      int
-	Name    string
-	Regions []string `json:",omitempty" yaml:",omitempty"`
+	ID   int
+	Name string
 
 	Machines
 }

pkg/wireguard/config.go

@@ -2,7 +2,6 @@ package wireguard
 
 import (
 	"bytes"
-	"errors"
 	"fmt"
 	"io"
 	"net/netip"
@@ -10,8 +9,8 @@ import (
 	"strings"
 	"text/template"
 
+	"asciigoat.org/ini/basic"
 	"darvaza.org/core"
-	"gopkg.in/gcfg.v1"
 )
 
 var configTemplate = template.Must(template.New("config").Funcs(template.FuncMap{
@@ -107,6 +106,11 @@ func (ep EndpointAddress) String() string {
 	}
 }
 
+// UnmarshalText loads an endpoint address from text data
+func (ep *EndpointAddress) UnmarshalText(b []byte) error {
+	return ep.FromString(string(b))
+}
+
 // FromString sets the EndpointAddress from a given "[host]:port"
 func (ep *EndpointAddress) FromString(s string) error {
 	host, port, err := core.SplitHostPort(s)
@@ -127,98 +131,6 @@ func (ep *EndpointAddress) FromString(s string) error {
 	return nil
 }
 
-type intermediateConfig struct {
-	Interface interfaceConfig
-	Peer      peersConfig
-}
-
-func (v *intermediateConfig) Export() (*Config, error) {
-	var out Config
-	var err error
-
-	// Interface
-	out.Interface, err = v.Interface.Export()
-	if err != nil {
-		return nil, err
-	}
-
-	// Peers
-	peers, ok := v.PeersCount()
-	if !ok {
-		return nil, errors.New("inconsistent Peer data")
-	}
-
-	for i := 0; i < peers; i++ {
-		p, err := v.ExportPeer(i)
-		if err != nil {
-			err = core.Wrapf(err, "Peer[%v]:", i)
-			return nil, err
-		}
-
-		out.Peer = append(out.Peer, p)
-	}
-
-	return &out, nil
-}
-
-type interfaceConfig struct {
-	Address    netip.Addr
-	PrivateKey string
-	ListenPort uint16
-}
-
-func (p interfaceConfig) Export() (InterfaceConfig, error) {
-	var err error
-
-	out := InterfaceConfig{
-		Address:    p.Address,
-		ListenPort: p.ListenPort,
-	}
-
-	out.PrivateKey, err = PrivateKeyFromBase64(p.PrivateKey)
-	if err != nil {
-		err = core.Wrap(err, "PrivateKey")
-		return InterfaceConfig{}, err
-	}
-
-	return out, nil
-}
-
-type peersConfig struct {
-	PublicKey  []string
-	Endpoint   []string
-	AllowedIPs []string
-}
-
-func (v *intermediateConfig) ExportPeer(i int) (PeerConfig, error) {
-	var out PeerConfig
-
-	// Endpoint
-	s := v.Peer.Endpoint[i]
-	err := out.Endpoint.FromString(s)
-	if err != nil {
-		err = core.Wrap(err, "Endpoint")
-		return out, err
-	}
-
-	// PublicKey
-	out.PublicKey, err = PublicKeyFromBase64(v.Peer.PublicKey[i])
-	if err != nil {
-		err = core.Wrap(err, "PublicKey")
-		return out, err
-	}
-
-	// AllowedIPs
-	s = v.Peer.AllowedIPs[i]
-	out.AllowedIPs, err = parseAllowedIPs(s)
-	if err != nil {
-		err = core.Wrap(err, "AllowedIPs")
-		return out, err
-	}
-
-	return out, nil
-}
-
 func parseAllowedIPs(data string) ([]netip.Prefix, error) {
 	var out []netip.Prefix
 
@@ -235,25 +147,17 @@ func parseAllowedIPs(data string) ([]netip.Prefix, error) {
 	return out, nil
 }
 
-func (v *intermediateConfig) PeersCount() (int, bool) {
-	c0 := len(v.Peer.Endpoint)
-	c1 := len(v.Peer.PublicKey)
-	c2 := len(v.Peer.AllowedIPs)
-
-	if c0 != c1 || c1 != c2 {
-		return 0, false
-	}
-
-	return c0, true
-}
-
 // NewConfigFromReader parses a wgN.conf file
 func NewConfigFromReader(r io.Reader) (*Config, error) {
-	temp := &intermediateConfig{}
-
-	if err := gcfg.ReadInto(temp, r); err != nil {
+	doc, err := basic.Decode(r)
+	if err != nil {
 		return nil, err
 	}
 
-	return temp.Export()
+	cfg, err := newConfigFromDocument(doc)
+	if err != nil {
+		return nil, err
+	}
+
+	return cfg, nil
 }

pkg/wireguard/config_parser.go

@@ -0,0 +1,169 @@
+package wireguard
+
+import (
+	"io/fs"
+	"strconv"
+
+	"asciigoat.org/ini/basic"
+	"darvaza.org/core"
+)
+
+type sectionHandler func(*Config, *basic.Section) error
+
+var sectionMap = map[string]func(*Config, *basic.Section) error{
+	"Interface": loadInterfaceConfSection,
+	"Peer":      loadPeerConfSection,
+}
+
+func loadConfSection(out *Config, src *basic.Section) error {
+	h, ok := sectionMap[src.Key]
+	if !ok {
+		return core.Wrapf(fs.ErrInvalid, "unknown section %q", src.Key)
+	}
+
+	return h(out, src)
+}
+
+func loadInterfaceConfSection(out *Config, src *basic.Section) error {
+	var cfg InterfaceConfig
+
+	for _, field := range src.Fields {
+		if err := loadInterfaceConfField(&cfg, field); err != nil {
+			return core.Wrap(err, "Interface")
+		}
+	}
+
+	out.Interface = cfg
+	return nil
+}
+
+func loadPeerConfSection(out *Config, src *basic.Section) error {
+	var cfg PeerConfig
+
+	for _, field := range src.Fields {
+		if err := loadPeerConfField(&cfg, field); err != nil {
+			return core.Wrapf(err, "Peer[%v]", len(out.Peer))
+		}
+	}
+
+	out.Peer = append(out.Peer, cfg)
+	return nil
+}
+
+// revive:disable:cyclomatic
+// revive:disable:cognitive-complexity
+
+func loadInterfaceConfField(cfg *InterfaceConfig, field basic.Field) error {
+	// revive:enable:cyclomatic
+	// revive:enable:cognitive-complexity
+
+	// TODO: refactor when asciigoat's ini parser learns to do reflection
+	switch field.Key {
+	case "Address":
+		if !core.IsZero(cfg.Address) {
+			return core.Wrapf(fs.ErrInvalid, "duplicate field %q", field.Key)
+		}
+
+		err := cfg.Address.UnmarshalText([]byte(field.Value))
+		switch {
+		case err != nil:
+			return core.Wrap(err, field.Key)
+		default:
+			return nil
+		}
+	case "PrivateKey":
+		if !core.IsZero(cfg.PrivateKey) {
+			return core.Wrapf(fs.ErrInvalid, "duplicate field %q", field.Key)
+		}
+
+		err := cfg.PrivateKey.UnmarshalText([]byte(field.Value))
+		switch {
+		case err != nil:
+			return core.Wrap(err, field.Key)
+		default:
+			return nil
+		}
+	case "ListenPort":
+		if cfg.ListenPort > 0 {
+			return core.Wrapf(fs.ErrInvalid, "duplicate field %q", field.Key)
+		}
+
+		u64, err := strconv.ParseUint(field.Value, 10, 16)
+		switch {
+		case err != nil:
+			return core.Wrap(err, field.Key)
+		case u64 == 0:
+			return core.Wrapf(fs.ErrInvalid, "invalid %q value", field.Key)
+		default:
+			cfg.ListenPort = uint16(u64)
+			return nil
+		}
+	default:
+		return core.Wrapf(fs.ErrInvalid, "unknown field %q", field.Key)
+	}
+}
+
+// revive:disable:cyclomatic
+// revive:disable:cognitive-complexity
+
+func loadPeerConfField(cfg *PeerConfig, field basic.Field) error {
+	// revive:enable:cyclomatic
+	// revive:enable:cognitive-complexity
+
+	switch field.Key {
+	case "PublicKey":
+		if !core.IsZero(cfg.PublicKey) {
+			return core.Wrapf(fs.ErrInvalid, "duplicate field %q", field.Key)
+		}
+
+		err := cfg.PublicKey.UnmarshalText([]byte(field.Value))
+		switch {
+		case err != nil:
+			return core.Wrap(err, field.Key)
+		default:
+			return nil
+		}
+	case "Endpoint":
+		if cfg.Endpoint.String() != "" {
+			return core.Wrapf(fs.ErrInvalid, "duplicate field %q", field.Key)
+		}
+
+		err := cfg.Endpoint.UnmarshalText([]byte(field.Value))
+		switch {
+		case err != nil:
+			return core.Wrap(err, field.Key)
+		default:
+			return nil
+		}
+	case "AllowedIPs":
+		s, err := parseAllowedIPs(field.Value)
+		switch {
+		case err != nil:
+			return core.Wrap(err, field.Key)
+		case len(s) > 0:
+			cfg.AllowedIPs = append(cfg.AllowedIPs, s...)
+			return nil
+		}
+	default:
+		return core.Wrapf(fs.ErrInvalid, "unknown field %q", field.Key)
+	}
+	return nil
+}
+
+func newConfigFromDocument(doc *basic.Document) (*Config, error) {
+	var out Config
+
+	if len(doc.Global) > 0 {
+		err := core.Wrap(fs.ErrInvalid, "fields before the first section")
+		return nil, err
+	}
+
+	for i := range doc.Sections {
+		src := &doc.Sections[i]
+		if err := loadConfSection(&out, src); err != nil {
+			return nil, err
+		}
+	}
+
+	return &out, nil
+}

pkg/wireguard/keys.go

@@ -51,6 +51,30 @@ func (pub PublicKey) String() string {
 	}
 }
 
+// UnmarshalText loads the value from base64
+func (key *PrivateKey) UnmarshalText(b []byte) error {
+	v, err := PrivateKeyFromBase64(string(b))
+	switch {
+	case err != nil:
+		return err
+	default:
+		*key = v
+		return nil
+	}
+}
+
+// UnmarshalText loads the value from base64
+func (pub *PublicKey) UnmarshalText(b []byte) error {
+	v, err := PublicKeyFromBase64(string(b))
+	switch {
+	case err != nil:
+		return err
+	default:
+		*pub = v
+		return nil
+	}
+}
+
 // MarshalJSON encodes the key for JSON, omitting empty.
 func (key PrivateKey) MarshalJSON() ([]byte, error) {
 	return encodeKeyJSON(key.String())