Fix #1844: Do not build pebble on non-supported platforms

config/config.go

@@ -432,7 +432,7 @@ func (cfg *Manager) LoadJSON(bs []byte) error {
 	loadCompJSON := func(name string, component ComponentConfig, jsonSection jsonSection, t SectionType) error {
 		component.SetBaseDir(dir)
 		raw, ok := jsonSection[name]
-		if ok {
+		if ok && raw != nil {
 			err := component.LoadJSON([]byte(*raw))
 			if err != nil {
 				return err

datastore/pebble/config.go

@@ -1,3 +1,5 @@
+//go:build !arm && !386 && !(openbsd && amd64)
+
 package pebble
 
 import (

datastore/pebble/config_test.go

@@ -1,3 +1,5 @@
+//go:build !arm && !386 && !(openbsd && amd64)
+
 package pebble
 
 import (

datastore/pebble/pebble.go

@@ -1,3 +1,5 @@
+//go:build !arm && !386 && !(openbsd && amd64)
+
 // Package pebble provides a configurable Pebble database backend for use with
 // IPFS Cluster.
 package pebble

datastore/pebble/pebble_disabled.go

@@ -0,0 +1,75 @@
+//go:build arm || 386 || (openbsd && amd64)
+
+package pebble
+
+import (
+	"errors"
+
+	"github.com/ipfs-cluster/ipfs-cluster/config"
+	ds "github.com/ipfs/go-datastore"
+)
+
+// ErrUnsupported is returned when trying to do something with this datastore
+// backend.
+var ErrUnsupported = errors.New("Pebble is unsupported in this OS/arch combination")
+
+const configKey = "pebble"
+const envConfigKey = "cluster_pebble"
+
+// Config is a placeholder object for architectures where pebble is unsupported.
+type Config struct {
+	config.Saver
+}
+
+// ConfigKey returns a human-friendly identifier for this type of Datastore.
+func (cfg *Config) ConfigKey() string {
+	return configKey
+}
+
+// Default initializes this Config with sensible values.
+func (cfg *Config) Default() error {
+	return nil
+}
+
+// ApplyEnvVars fills in any Config fields found as environment variables.
+func (cfg *Config) ApplyEnvVars() error {
+	return nil
+}
+
+// Validate checks that the fields of this Config have working values,
+// at least in appearance.
+func (cfg *Config) Validate() error {
+	return nil
+}
+
+// LoadJSON reads the fields of this Config from a JSON byteslice as
+// generated by ToJSON.
+func (cfg *Config) LoadJSON(raw []byte) error {
+	return nil
+}
+
+// ToJSON generates a JSON-formatted human-friendly representation of this
+// Config.
+func (cfg *Config) ToJSON() (raw []byte, err error) {
+	return []byte("{}"), nil
+}
+
+// GetFolder returns the Pebble folder.
+func (cfg *Config) GetFolder() string {
+	return ""
+}
+
+// ToDisplayJSON returns JSON config as a string.
+func (cfg *Config) ToDisplayJSON() ([]byte, error) {
+	return nil, nil
+}
+
+// New returns always ErrUnsupported
+func New(cfg *Config) (ds.Datastore, error) {
+	return nil, ErrUnsupported
+}
+
+// Cleanup does nothing
+func Cleanup(cfg *Config) error {
+	return ErrUnsupported
+}