/
permissions.go
112 lines (95 loc) · 3.21 KB
/
permissions.go
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// Copyright 2018 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package flags
import (
"encoding/json"
"fmt"
"strings"
"v.io/v23/verror"
)
// PermissionsFlag represents a flag.Value for --v23.permissions.file
type PermissionsFlag struct {
isSet bool
files map[string]string
}
// String implements flag.Value.
func (permsf *PermissionsFlag) String() string {
return fmt.Sprintf("%v", permsf.files)
}
// Set implements flag.Value.
func (permsf *PermissionsFlag) Set(v string) error {
if !permsf.isSet {
// override the default value
permsf.isSet = true
permsf.files = make(map[string]string)
}
parts := strings.SplitN(v, ":", 2)
if len(parts) != 2 {
return verror.New(errNotNameColonFile, nil, v)
}
name, file := parts[0], parts[1]
permsf.files[name] = file
return nil
}
// PermissionsLiteralFlag represents a flag.Value for --v23.permissions.literal
type PermissionsLiteralFlag struct {
isSet bool
permissions string
}
// String implements flag.Value.
func (permsl *PermissionsLiteralFlag) String() string {
return fmt.Sprintf("%v", permsl.permissions)
}
// Set implements flag.Value.
func (permsl *PermissionsLiteralFlag) Set(v string) error {
if !json.Valid([]byte(v)) {
return fmt.Errorf("invalid json: %v", v)
}
permsl.isSet = true
permsl.permissions += v
return nil
}
// PermissionsFlags contains the values of the PermissionsFlags flag group.
type PermissionsFlags struct {
// List of named Permissions files.
Files PermissionsFlag `cmdline:"v23.permissions.file,,specify a perms file as <name>:<permsfile>"`
// Literal permissions, override everything else.
Literal PermissionsLiteralFlag `cmdline:"v23.permissions.literal,,explicitly specify the runtime perms as a JSON-encoded access.Permissions. Overrides all --v23.permissions.file flags"`
}
// PermissionsFile returns the file which is presumed to contain Permissions
// information associated with the supplied name parameter.
func (af PermissionsFlags) PermissionsFile(name string) string {
return af.Files.files[name]
}
// PermissionsNamesAndFiles returns the set of permission names and associated
// files specified using --v23.permissions.file.
func (af PermissionsFlags) PermissionsNamesAndFiles() map[string]string {
if af.Files.files == nil {
return nil
}
r := make(map[string]string, len(af.Files.files))
for k, v := range af.Files.files {
r[k] = v
}
return r
}
// PermissionsLiteral returns the in-line literal permissions provided
// on the command line.
func (af PermissionsFlags) PermissionsLiteral() string {
return af.Literal.String()
}
// AddPermissionsFile adds a permissions file, which must be in
// the same format as accepted by --v23.permissions.file
func (af PermissionsFlags) AddPermissionsFile(arg string) error {
return af.Files.Set(arg)
}
// AddPermissionsLiteral adds another literal permissions statement.
func (af PermissionsFlags) AddPermissionsLiteral(arg string) error {
return af.Literal.Set(arg)
}
// ExplicitlySpecified returns true if either of the permissions flags was
// explicitly set on the command line.
func (af PermissionsFlags) ExplicitlySpecified() bool {
return af.Files.isSet || af.Literal.isSet
}