common

package

v2.2.5+incompatible Latest Latest Go to latest Published: Apr 6, 2021 License: AGPL-3.0 Imports: 3 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
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Repository

github.com/ckloh720/pydio-cells

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Documentation ¶

Overview ¶

Package common provides a library of tools used by all pydio services

Constants ¶

View Source

const (
	ServiceNats = "nats"

	ServiceLog         = "log"
	ServiceConfig      = "config"
	ServiceInstall     = "install"
	ServiceUpdate      = "update"
	ServiceHealthCheck = "healthcheck"

	ServiceTagBroker     = "broker"
	ServiceTagData       = "data"
	ServiceTagDatasource = "datasource"
	ServiceTagDiscovery  = "discovery"
	ServiceTagFrontend   = "frontend"
	ServiceTagGateway    = "gateway"
	ServiceTagIdm        = "idm"
	ServiceTagScheduler  = "scheduler"

	ServiceAcl       = "acl"
	ServiceShare     = "share"
	ServiceRole      = "role"
	ServiceUser      = "user"
	ServiceAuth      = "auth"
	ServiceOAuth     = "oauth"
	ServiceToken     = "token"
	ServiceWorkspace = "workspace"
	ServicePolicy    = "policy"
	ServiceGraph     = "graph"
	ServiceUserMeta  = "user-meta"

	ServiceUserKey   = "user-key"
	ServiceTree      = "tree"
	ServiceMeta      = "meta"
	ServiceEncKey    = "data-key"
	ServiceSearch    = "search"
	ServiceChanges   = "changes"
	ServiceSync      = "sync"
	ServiceTemplates = "templates"

	ServiceActivity     = "activity"
	ServiceMailer       = "mailer"
	ServiceWebSocket    = "websocket"
	ServiceChat         = "chat"
	ServiceFrontend     = "frontend"
	ServiceFrontStatics = "statics"

	ServiceTimer    = "timer"
	ServiceJobs     = "jobs"
	ServiceTasks    = "tasks"
	ServiceVersions = "versions"
	ServiceDocStore = "docstore"

	ServiceData_        = "data."
	ServiceDataIndex    = ServiceData_ + "index"
	ServiceDataObjects  = ServiceData_ + "objects"
	ServiceDataSync     = ServiceData_ + "sync"
	ServiceDataIndex_   = ServiceDataIndex + "."
	ServiceDataObjects_ = ServiceDataObjects + "."
	ServiceDataSync_    = ServiceDataSync + "."

	ServiceGrpcNamespace_    = "pydio.grpc."
	ServiceWebNamespace_     = "pydio.web."
	ServiceRestNamespace_    = "pydio.rest."
	ServiceGatewayNamespace_ = "pydio.gateway."
	ServiceTestNamespace_    = "pydio.test."

	ServiceGatewayProxy     = ServiceGatewayNamespace_ + "proxy"
	ServiceGatewayData      = ServiceGatewayNamespace_ + "data"
	ServiceGatewayGrpc      = ServiceGatewayNamespace_ + "grpc"
	ServiceGatewayGrpcClear = ServiceGatewayNamespace_ + "grpc.clear"
	ServiceGatewayDav       = ServiceGatewayNamespace_ + "dav"
	ServiceGatewayWopi      = ServiceGatewayNamespace_ + "wopi"
	ServiceMicroApi         = ServiceGatewayNamespace_ + "rest"
)

Defines all constants for services names.

View Source

const (
	TopicServiceRegistration = "topic.pydio.service.registration"
	TopicProxyRestarted      = "topic.pydio.proxy.restarted"
	TopicServiceStop         = "topic.pydio.service.stop" // @todo This is used in "stop" command but probably out-of-date

	EventTypeServiceRegistered        = "registered"
	EventTypeServiceUnregistered      = "unregistered"
	EventHeaderServiceRegisterService = "x-service-name"
	EventHeaderServiceRegisterPeer    = "x-service-peer"
	EventTypeDebugPrintInternals      = "debug"

	TopicReloadAssets    = "topic.pydio.assets.reload"
	TopicIndexChanges    = "topic.pydio.index.nodes.changes"
	TopicTreeChanges     = "topic.pydio.tree.nodes.changes"
	TopicMetaChanges     = "topic.pydio.meta.nodes.changes"
	TopicTimerEvent      = "topic.pydio.meta.timer.event"
	TopicJobConfigEvent  = "topic.pydio.jobconfig.event"
	TopicJobTaskEvent    = "topic.pydio.jobconfig.event"
	TopicIdmEvent        = "topic.pydio.idm.event"
	TopicActivityEvent   = "topic.pydio.activity.event"
	TopicChatEvent       = "topic.pydio.chat.event"
	TopicDatasourceEvent = "topic.pydio.datasource.event"
	TopicIndexEvent      = "topic.pydio.index.event"
)

Define constants for Event Bus Topics

View Source

const (
	MetaNamespaceDatasourceName      = "pydio:meta-data-source-name"
	MetaNamespaceDatasourcePath      = "pydio:meta-data-source-path"
	MetaNamespaceNodeTestLocalFolder = "pydio:test:local-folder-storage"
	MetaNamespaceRecycleRestore      = "pydio:recycle_restore"
	MetaNamespaceNodeName            = "name"
	RecycleBinName                   = "recycle_bin"

	PydioThumbstoreNamespace       = "pydio-thumbstore"
	PydioDocstoreBinariesNamespace = "pydio-binaries"
	PydioVersionsNamespace         = "versions-store"
)

Define constants for metadata and fixed datasources

View Source

const (
	PydioContextUserKey         = "X-Pydio-User"
	PydioSystemUsername         = "pydio.system.user"
	PydioS3AnonUsername         = "pydio.anon.user"
	PydioSyncHiddenFile         = ".pydio"
	XAmzMetaClearSize           = "X-Amz-Meta-Pydio-Clear-Size"
	XAmzMetaClearSizeUnkown     = "unknown"
	XAmzMetaNodeUuid            = "X-Amz-Meta-Pydio-Node-Uuid"
	XAmzMetaContentMd5          = "X-Amz-Meta-Content-Md5"
	XAmzMetaDirective           = "X-Amz-Metadata-Directive"
	XPydioClientUuid            = "X-Pydio-Client-Uuid"
	XPydioSessionUuid           = "X-Pydio-Session"
	XPydioIndexationSessionUuid = "X-Pydio-Indexation-Session"
	XPydioFrontendSessionUuid   = "X-Pydio-Frontend-Session"
	XPydioMoveUuid              = "X-Pydio-Move"
	SyncSessionClose_           = "close-"
	SyncSessionPrefixCopy       = "copy-"
	SyncSessionPrefixMove       = "move-"

	PydioProfileAdmin    = "admin"
	PydioProfileStandard = "standard"
	PydioProfileShared   = "shared"
	PydioProfileAnon     = "anon"

	KeyringMasterKey             = "keyring.master"
	MetaFlagReadonly             = "node_readonly"
	MetaFlagLevelReadonly        = "level_readonly"
	MetaFlagEncrypted            = "datasource_encrypted"
	MetaFlagVersioning           = "datasource_versioning"
	MetaFlagWorkspaceRoot        = "ws_root"
	MetaFlagWorkspaceScope       = "ws_scope"
	MetaFlagWorkspaceSyncable    = "ws_syncable"
	MetaFlagWorkspacePermissions = "ws_permissions"
	MetaFlagWorkspaceLabel       = "ws_label"
	MetaFlagWorkspaceDescription = "ws_description"
	MetaFlagWorkspaceSlug        = "ws_slug"
	MetaFlagWorkspaceUuid        = "ws_uuid"
	MetaFlagVirtualRoot          = "virtual_root"
	MetaFlagBucket               = "ds_bucket"
	NodeFlagEtagTemporary        = "temporary"
)

Additional constants for authentication/authorization aspects

View Source

const (
	DocStoreIdSelections         = "selections"
	DocStoreIdVirtualNodes       = "virtualnodes"
	DocStoreIdVersioningPolicies = "versioningPolicies"
	DocStoreIdShares             = "share"
	DocStoreIdResetPassKeys      = "resetPasswordKeys"
)

DocStore constants for StoreID's

View Source

const (
	KEY_MSG_ID = "MsgId"
	KEY_TS     = "Ts"
	KEY_NANO   = "Nano"
	KEY_LEVEL  = "Level"
	KEY_LOGGER = "Logger"
	KEY_MSG    = "Msg"
)

Define string used as keys.

View Source

const (
	// Login
	AUDIT_LOGIN_SUCCEED       = "1"
	AUDIT_LOGIN_FAILED        = "2"
	AUDIT_LOGIN_POLICY_DENIAL = "3"
	AUDIT_INVALID_JWT         = "4"
	AUDIT_LOCK_USER           = "5"

	// Tree events
	AUDIT_NODE_CREATE       = "11"
	AUDIT_NODE_READ         = "12"
	AUDIT_NODE_LIST         = "13"
	AUDIT_NODE_UPDATE       = "14"
	AUDIT_NODE_DELETE       = "15"
	AUDIT_WS_CREATE         = "16"
	AUDIT_WS_UPDATE         = "17"
	AUDIT_WS_DELETE         = "18"
	AUDIT_NODE_MOVED_TO_BIN = "19"

	// S3 Objects
	AUDIT_OBJECT_GET = "21"
	AUDIT_OBJECT_PUT = "22"

	// Users, Group, Roles
	AUDIT_USER_CREATE  = "41"
	AUDIT_USER_READ    = "42"
	AUDIT_USER_UPDATE  = "43"
	AUDIT_USER_DELETE  = "44"
	AUDIT_GROUP_CREATE = "46"
	AUDIT_GROUP_READ   = "47"
	AUDIT_GROUP_UPDATE = "48"
	AUDIT_GROUP_DELETE = "49"
	AUDIT_ROLE_CREATE  = "51"
	AUDIT_ROLE_READ    = "52"
	AUDIT_ROLE_UPDATE  = "53"
	AUDIT_ROLE_DELETE  = "54"

	// Policies
	AUDIT_POLICY_GROUP_STORE  = "61"
	AUDIT_POLICY_GROUP_DELETE = "62"
	AUDIT_POLICY_STORE        = "63"
	AUDIT_POLICY_DELETE       = "64"

	// ShareLinks And Cells
	AUDIT_CELL_CREATE = "71"
	AUDIT_CELL_READ   = "72"
	AUDIT_CELL_UPDATE = "73"
	AUDIT_CELL_DELETE = "74"
	AUDIT_LINK_CREATE = "75"
	AUDIT_LINK_READ   = "76"
	AUDIT_LINK_UPDATE = "77"
	AUDIT_LINK_DELETE = "78"
)

Known audit message IDs

View Source

const (
	KEY_CONTEXT = "Context"

	// Follow a given request between the various services
	KEY_SPAN_UUID        = "SpanUuid"
	KEY_SPAN_PARENT_UUID = "SpanParentUuid"
	KEY_SPAN_ROOT_UUID   = "SpanRootUuid"

	// Group messages for a given high level operation
	KEY_OPERATION_UUID  = "OperationUuid"
	KEY_OPERATION_LABEL = "OperationLabel"

	KEY_NODE      = "Node"
	KEY_NODE_UUID = "NodeUuid"
	KEY_NODE_PATH = "NodePath"

	KEY_WORKSPACE       = "Workspace"
	KEY_WORKSPACE_UUID  = "WorkspaceUuid"
	KEY_WORKSPACE_SCOPE = "WorkspaceScope"

	KEY_CHANGE_LOG        = "ChangeLog"
	KEY_NODE_CHANGE_EVENT = "NodeChangeEvent"
	KEY_VERSIONING_POLICY = "VersioningPolicy"

	KEY_ACTIVITY_SUBSCRIPTION   = "ActivitySubscription"
	KEY_ACTIVITY_STREAM_REQUEST = "StreamActivitiesRequest"
	KEY_ACTIVITY_POST_EVENT     = "PostActivityEvent"
	KEY_ACTIVITY_OBJECT         = "ActivityObject"

	KEY_ROLE      = "Role"
	KEY_ROLE_UUID = "RoleUuid"
	KEY_ROLES     = "Roles"
	KEY_PROFILE   = "Profile"

	KEY_USER      = "User"
	KEY_USERNAME  = "UserName"
	KEY_USER_UUID = "UserUuid"

	KEY_GROUP_PATH = "GroupPath"

	KEY_CONNECTOR = "Connector"

	// Should be ACL and ACLID if we use proto names, changed to stay homogeneous with the other fields
	KEY_ACL    = "Acl"
	KEY_ACL_ID = "AclId"

	// Pydio internal merged representation of all ACLs that a user has access to
	KEY_ACCESS_LIST = "AccessList"

	KEY_POLICY_GROUP      = "PolicyGroup"
	KEY_POLICY_GROUP_UUID = "PolicyGroupUuid"
	KEY_POLICY            = "Policy"
	KEY_POLICY_ID         = "PolicyId"
	KEY_POLICY_REQUEST    = "PolicyRequest"

	// Scheduler
	KEY_JOB       = "Job"
	KEY_JOB_ID    = "JobId"
	KEY_ACTION    = "Action"
	KEY_ACTION_ID = "ActionId"
	KEY_TASK      = "Task"
	KEY_TASK_ID   = "TaskId"
	// Running tasks in scheduler
	KEY_SCHEDULER_JOB_ID      = "SchedulerJobUuid"
	KEY_SCHEDULER_TASK_ID     = "SchedulerTaskUuid"
	KEY_SCHEDULER_ACTION_PATH = "SchedulerTaskActionPath"

	// Cells
	KEY_CELL      = "Cell"
	KEY_CELL_UUID = "CellUuid"
	KEY_LINK      = "ShareLink"
	KEY_LINK_UUID = "ShareLinkUuid"

	// Chat
	KEY_CHAT_ROOM          = "ChatRoom"
	KEY_CHAT_LIST_ROOM_REQ = "ChatListRoomRequest"
	KEY_CHAT_LIST_MSG_REQ  = "ChatListMsgRequest"
	KEY_CHAT_POST_MSG_REQ  = "ChatPostMsgRequest"
)

Known audit message IDs

View Source

const (
	KEY_FRONT_IP      = "FrontIp"
	KEY_FRONT_USERID  = "UserId"
	KEY_FRONT_WKSID   = "WorkspaceId"
	KEY_FRONT_SOURCE  = "Source"
	KEY_FRONT_PREFIX  = "Prefix"
	KEY_FRONT_MESSAGE = "Message"
	KEY_FRONT_NODES   = "Nodes"
)

Keys for the front end

Variables ¶

View Source

var (
	BuildStamp    string
	BuildRevision string
)

Main code information. Set by the go linker in the resulting binary when doing 'make main'

View Source

var (
	PackageType  string
	PackageLabel string
)

Package info. Initialised by main.

View Source

var (
	UpdateDefaultChannel   = "stable"
	UpdateDefaultServerUrl = "https://updatecells.pydio.com/"
	UpdateDefaultPublicKey = `` /* 424-byte string literal not displayed */
)

Update Server default values.

View Source

var (
	LogConfig        LogConfigType
	LogLevel         zapcore.Level
	LogCaptureStdOut bool
)

Logging Levels.

View Source

var (
	LogEventLabels = map[string]string{
		AUDIT_LOGIN_SUCCEED: "Login succeed",
		AUDIT_LOGIN_FAILED:  "Login failed",
		AUDIT_NODE_CREATE:   "Create Node",
		AUDIT_NODE_READ:     "Read Node",
		AUDIT_NODE_LIST:     "List Node",
		AUDIT_NODE_UPDATE:   "Upadate Node",
		AUDIT_NODE_DELETE:   "Delete Node",
		AUDIT_OBJECT_GET:    "Get Object",
		AUDIT_OBJECT_PUT:    "Put Object",
	}
)

View Source

var (
	// PydioUserProfiles order reflects the level of authorizations
	PydioUserProfiles = []string{
		PydioProfileAnon,
		PydioProfileShared,
		PydioProfileStandard,
		PydioProfileAdmin,
	}
)

View Source

var (
	XSpecialPydioHeaders = []string{
		XPydioClientUuid,
		XPydioSessionUuid,
		XPydioIndexationSessionUuid,
		XPydioFrontendSessionUuid,
		XPydioMoveUuid,
	}
)

Functions ¶

func Version ¶

func Version() *hashiversion.Version

Version returns the current code version as an object.

Types ¶

type Converter ¶

type Converter interface {
	Convert(*any.Any) (string, bool)
}

Converter interface

type LogConfigType ¶

type LogConfigType string

Various custom types internally used by Pydio.

const (
	LogConfigConsole    LogConfigType = "console"
	LogConfigProduction LogConfigType = "production"
)

Define constants for Loggging configuration

type Manager ¶

type Manager interface {
	Get(string) interface{}
	Set(string, interface{}) error
	Del(string) error
	Map(string) map[string]interface{}
}

Manager interface

type Scanner ¶

type Scanner interface {
	Scan(val interface{}) error
}

type ServiceName ¶

type ServiceName string

Various custom types internally used by Pydio.

type ServiceTag ¶

type ServiceTag string

Various custom types internally used by Pydio.

type ServiceType ¶

type ServiceType string

Various custom types internally used by Pydio.

type XMLSerializableForm ¶ added in v1.2.2

type XMLSerializableForm interface {
	Serialize(languages ...string) interface{}
}

Source Files ¶

View all Source files

Directories ¶

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Path	Synopsis
auth Package auth provides tools related to authentication of pydio services	Package auth provides tools related to authentication of pydio services
claim Package claim wraps the JWT claims with util functions	Package claim wraps the JWT claims with util functions
hydra
boltdb Package BoltDB provides tools for using Bolt as a standard persistence layer for services	Package BoltDB provides tools for using Bolt as a standard persistence layer for services
caddy
maintenance
config Package config provides tools for managing configurations	Package config provides tools for managing configurations
micro
micro/envvar Package envvar implements Pydio specific interface for dynamic configurations that are backed by OS environment variables.	Package envvar implements Pydio specific interface for dynamic configurations that are backed by OS environment variables.
micro/file
micro/memory
micro/remote Package source implements a configuration client backed by a config server	Package source implements a configuration client backed by a config server
micro/vault
migrations
source
sql
crypto Package crypto provides tools for data encryption and certificates management	Package crypto provides tools for data encryption and certificates management
providers
dao Package dao provides abstraction of persistence layer used by pydio services.	Package dao provides abstraction of persistence layer used by pydio services.
etl
actions
models
stores
stores/cells/local
stores/pydio8
event Package event wraps protobuf events to add context information	Package event wraps protobuf events to add context information
forms Package forms provides utility methods to generate XML that is interpreted by the Front End to build forms.	Package forms provides utility methods to generate XML that is interpreted by the Front End to build forms.
protos
log Package log define and configure the Pydio loggers based on zap.	Package log define and configure the Pydio loggers based on zap.
micro Package defaults initializes the defaults GRPC clients and servers used by services	Package defaults initializes the defaults GRPC clients and servers used by services
broker
broker/http
broker/nats
client/grpc Package grpc provides a gRPC client	Package grpc provides a gRPC client
rcache
registry
registry/nats Package nats provides a NATS registry using broadcast queries	Package nats provides a NATS registry using broadcast queries
router Package router provides api service routing	Package router provides api service routing
selector/cache Package cache is a caching selector.	Package cache is a caching selector.
server/grpc Package grpc provides a grpc server	Package grpc provides a grpc server
server/http Package http implements a go-micro.Server	Package http implements a go-micro.Server
transport/grpc
mocks Package mocks should provide utils used by tests to mock various layers.	Package mocks should provide utils used by tests to mock various layers.
plugins
proto ## Protobuf Definitions	## Protobuf Definitions
activity Package activity is a generated protocol buffer package.	Package activity is a generated protocol buffer package.
auth Package auth is a generated protocol buffer package.	Package auth is a generated protocol buffer package.
chat Package chat is a generated protocol buffer package.	Package chat is a generated protocol buffer package.
ctl Package ctl is a generated protocol buffer package.	Package ctl is a generated protocol buffer package.
docstore Package docstore is a generated protocol buffer package.	Package docstore is a generated protocol buffer package.
encryption Package encryption is a generated protocol buffer package.	Package encryption is a generated protocol buffer package.
front Package front is a generated protocol buffer package.	Package front is a generated protocol buffer package.
idm Package idm is a generated protocol buffer package.	Package idm is a generated protocol buffer package.
install Package install is a generated protocol buffer package.	Package install is a generated protocol buffer package.
jobs Package jobs is a generated protocol buffer package.	Package jobs is a generated protocol buffer package.
log Package log is a generated protocol buffer package.	Package log is a generated protocol buffer package.
mailer Package mailer is a generated protocol buffer package.	Package mailer is a generated protocol buffer package.
object Package object is a generated protocol buffer package.	Package object is a generated protocol buffer package.
rest Package rest is a generated protocol buffer package.	Package rest is a generated protocol buffer package.
rest/cmd Package cmd provides a specific tool for transforming json swagger file into a go file	Package cmd provides a specific tool for transforming json swagger file into a go file
sync Package sync is a generated protocol buffer package.	Package sync is a generated protocol buffer package.
test Package test is a generated protocol buffer package.	Package test is a generated protocol buffer package.
tree Package tree is a generated protocol buffer package.	Package tree is a generated protocol buffer package.
update Package update is a generated protocol buffer package.	Package update is a generated protocol buffer package.
registry Package registry provides the main glue between services	Package registry provides the main glue between services
service Package service acts as a factory for all Pydio services.	Package service acts as a factory for all Pydio services.
context Package servicecontext performs context values read/write, generally through server or client wrappers	Package servicecontext performs context values read/write, generally through server or client wrappers
frontend Package frontend provides tools to publish static data from within any micro service	Package frontend provides tools to publish static data from within any micro service
metrics
proto Package service is a generated protocol buffer package.	Package service is a generated protocol buffer package.
resources Package resources provides extendable service Handler for managing resource-policy based data.	Package resources provides extendable service Handler for managing resource-policy based data.
sql Package sql provides tools and DAOs for speaking SQL as well as managing tables migrations	Package sql provides tools and DAOs for speaking SQL as well as managing tables migrations
index Package index provides ready-to-use tables and DAOs for storing hierarchical data using the nested sets pattern	Package index provides ready-to-use tables and DAOs for storing hierarchical data using the nested sets pattern
ladon-manager
resources Package resources provides ready-to-use SQL schemes and DAOs for attaching resource policies to any data	Package resources provides ready-to-use SQL schemes and DAOs for attaching resource policies to any data
sync
endpoints/cells Package cells provides endpoints for speaking either with a local server using a views.Router (and connecting to the local NATS registry), or a remote Cells server using a GRPC gateway client.	Package cells provides endpoints for speaking either with a local server using a views.Router (and connecting to the local NATS registry), or a remote Cells server using a GRPC gateway client.
endpoints/filesystem Package file system provides endpoints for reading/writing from/to a local folder	Package file system provides endpoints for reading/writing from/to a local folder
endpoints/index Package index provides a GRPC client for storing information into any tree.NodeProviderClient/tree.NodeReceiverClient service.	Package index provides a GRPC client for storing information into any tree.NodeProviderClient/tree.NodeReceiverClient service.
endpoints/memory Package memory provides an in-memory basic implementation of an Endpoint, with nodes stored in a map.	Package memory provides an in-memory basic implementation of an Endpoint, with nodes stored in a map.
endpoints/s3 Package s3 provides an endpoint for connecting to Amazon S3 or an S3-compatible storage	Package s3 provides an endpoint for connecting to Amazon S3 or an S3-compatible storage
endpoints/snapshot Package snapshot provides fast in-memory or on-file implementations of endpoint for storing snapshots	Package snapshot provides fast in-memory or on-file implementations of endpoint for storing snapshots
filters Package filters provides batchers and filters to analyze and simplify sync events	Package filters provides batchers and filters to analyze and simplify sync events
merger Package merger implements all logic to compare trees and create set of operations to be applied	Package merger implements all logic to compare trees and create set of operations to be applied
model Package model gathers the main structs and interfaces used in sync library.	Package model gathers the main structs and interfaces used in sync library.
proc Package proc provides actual actions to be performed once the sync has filtered all events	Package proc provides actual actions to be performed once the sync has filtered all events
task Package task defines a synchronization task	Package task defines a synchronization task
utils Package utils provides swiss-knife tools for all services	Package utils provides swiss-knife tools for all services
cache Package cache provides ready-to-use in-memory cache mechanisms	Package cache provides ready-to-use in-memory cache mechanisms
context Package context manipulates context metadata	Package context manipulates context metadata
docs
error Package error creates and parses common errors	Package error creates and parses common errors
filesystem
i18n Package i18n wraps go-i18n lib for manipulating bundles	Package i18n wraps go-i18n lib for manipulating bundles
meta Package meta provides tool for reading metadata from services declaring "MetaProvider" support	Package meta provides tool for reading metadata from services declaring "MetaProvider" support
migrations
mtree Package mtree provides advanced tools for encoding tree paths in a material format	Package mtree provides advanced tools for encoding tree paths in a material format
net Package net provides tools for reading IPs, available Ports, extending HTTP requests, etc.	Package net provides tools for reading IPs, available Ports, extending HTTP requests, etc.
permissions Package permissions provides high-level tools for computing permissions from ACLs	Package permissions provides high-level tools for computing permissions from ACLs
schedule Package schedule provides a fixed ticker based on a start time iso8601 interval periods are supported	Package schedule provides a fixed ticker based on a start time iso8601 interval periods are supported
std Package std provides tools for standard types (strings, int, floats, etc).	Package std provides tools for standard types (strings, int, floats, etc).
views Package views provides high-level clients for talking to the main data tree in certain context.	Package views provides high-level clients for talking to the main data tree in certain context.