mirror of https://github.com/perkeep/perkeep.git
104 lines
2.5 KiB
Go
104 lines
2.5 KiB
Go
/*
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Copyright 2011 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"flag"
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"fmt"
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"camlistore.org/pkg/blob"
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"camlistore.org/pkg/cmdmain"
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"camlistore.org/pkg/schema"
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)
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type attrCmd struct {
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add bool
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del bool
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up *Uploader
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}
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func init() {
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cmdmain.RegisterCommand("attr", func(flags *flag.FlagSet) cmdmain.CommandRunner {
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cmd := new(attrCmd)
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flags.BoolVar(&cmd.add, "add", false, `Adds attribute (e.g. "tag")`)
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flags.BoolVar(&cmd.del, "del", false, "Deletes named attribute [value]")
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return cmd
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})
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}
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func (c *attrCmd) Describe() string {
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return "Add, set, or delete a permanode's attribute."
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}
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func (c *attrCmd) Usage() {
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cmdmain.Errorf("Usage: camput [globalopts] attr [attroption] <permanode> <name> <value>")
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}
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func (c *attrCmd) Examples() []string {
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return []string{
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"<permanode> <name> <value> Set attribute",
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"--add <permanode> <name> <value> Adds attribute (e.g. \"tag\")",
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"--del <permanode> <name> [<value>] Deletes named attribute",
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}
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}
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func (c *attrCmd) RunCommand(args []string) error {
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if err := c.checkArgs(args); err != nil {
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return err
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}
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permanode, attr := args[0], args[1]
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value := ""
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if len(args) > 2 {
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value = args[2]
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}
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pn, ok := blob.Parse(permanode)
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if !ok {
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return fmt.Errorf("Error parsing blobref %q", permanode)
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}
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claimFunc := func() func(blob.Ref, string, string) *schema.Builder {
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switch {
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case c.add:
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return schema.NewAddAttributeClaim
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case c.del:
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return schema.NewDelAttributeClaim
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default:
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return schema.NewSetAttributeClaim
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}
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}()
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bb := claimFunc(pn, attr, value)
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put, err := getUploader().UploadAndSignBlob(bb)
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handleResult(bb.Type(), put, err)
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return nil
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}
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func (c *attrCmd) checkArgs(args []string) error {
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if c.del {
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if c.add {
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return cmdmain.UsageError("Add and del options are exclusive")
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}
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if len(args) < 2 {
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return cmdmain.UsageError("Attr -del takes at least 2 args: <permanode> <attr> [<value>]")
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}
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return nil
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}
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if len(args) != 3 {
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return cmdmain.UsageError("Attr takes 3 args: <permanode> <attr> <value>")
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}
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return nil
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}
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