From 4de510778b6e55a2238374834d00b03726da76d4 Mon Sep 17 00:00:00 2001
From: Laria Carolin Chabowski <laria@laria.me>
Date: Tue, 3 Oct 2017 14:59:45 +0200
Subject: Documentation

---
 storage/cloud/swift.go   |  2 ++
 storage/filter/filter.go | 15 +++++++++++++++
 storage/local/local.go   |  7 +++++++
 storage/memory/memory.go |  3 +++
 4 files changed, 27 insertions(+)

(limited to 'storage')

diff --git a/storage/cloud/swift.go b/storage/cloud/swift.go
index a721f67..f08b1cc 100644
--- a/storage/cloud/swift.go
+++ b/storage/cloud/swift.go
@@ -35,6 +35,8 @@ type SwiftConfig struct {
 	Timeout        string `toml:"timeout,omitempty"`
 }
 
+// SwiftStorageCreator creates an object storage that saves the objects to an openstack swift storage.
+// Use the method "openstack-swift" in your config and refer to the `SwiftConfig` structure for additional config keys.
 func SwiftStorageCreator() storage.CreateStorageFromConfig {
 	return cloudStorageCreator(func(conf config.Config, name string) (CloudStorage, error) {
 		var storage_conf SwiftConfig
diff --git a/storage/filter/filter.go b/storage/filter/filter.go
index 52ecbfd..1628c1e 100644
--- a/storage/filter/filter.go
+++ b/storage/filter/filter.go
@@ -34,6 +34,21 @@ func (pf PipeFilter) Transform(b []byte) ([]byte, error) {
 	return buf.Bytes(), nil
 }
 
+// FilterSorage is a storage implementation wrapping around another storage, sending each raw object through an extrenal
+// binary for custom de/encoding (think encryption, compression, ...).
+//
+// It is used in a configuration by using the method "filter". It needs the config key "base" referencing the name of
+// another configured storage. Also needed are the string lists "decode" and "encode", describing which binary to call
+// with which parameters.
+//
+// For example, here is a configuration for a filter storage wrapping a storage "foo",
+// encrypting the content with gpg for the key "foobar"
+//
+//     [storage.foo_encrypted]
+//     method="filter"
+//     base="foo"
+//     encode=["gpg", "--encrypt", "--recipient", "foobar"]
+//     decode=["gpg", "--decrypt"]
 type FilterStorage struct {
 	Base           storage.Storage
 	Decode, Encode Filter
diff --git a/storage/local/local.go b/storage/local/local.go
index 7dc59cb..ae39eb5 100644
--- a/storage/local/local.go
+++ b/storage/local/local.go
@@ -20,6 +20,13 @@ func objectDir(id objects.ObjectId) string {
 	return joinPath(string(id.Algo), hex.EncodeToString(id.Sum[0:1]))
 }
 
+// LocalStorage is a storage implementation that saves your objects on your local filesystem.
+//
+// Example config:
+//
+//     [storage.local_test]
+//     method="local"
+//     path="~/.local/share/petrific" # Save the objects here
 type LocalStorage struct {
 	Path  string
 	index storage.Index
diff --git a/storage/memory/memory.go b/storage/memory/memory.go
index e73c51a..dc72f70 100644
--- a/storage/memory/memory.go
+++ b/storage/memory/memory.go
@@ -6,6 +6,9 @@ import (
 	"code.laria.me/petrific/storage"
 )
 
+// Memory storage is an in-memory storage. It is rather useless when using petrific, it is mostly used for internal testing.
+// But if you want to use the memory storage anyway, you can do that by putting a storage section with the method
+// "memory" in your config file
 type MemoryStorage struct {
 	objects map[string][]byte
 	bytype  map[objects.ObjectType][]objects.ObjectId
-- 
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