example of adding, pinning, and unpinning using IPFS as library

add_pin_unpin.go

package main

import (
	"context"
	"log"
	"net"

	core "github.com/ipfs/go-ipfs/core"
	corerepo "github.com/ipfs/go-ipfs/core/corerepo"
	coreunix "github.com/ipfs/go-ipfs/core/coreunix"
)

func main() {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	nd, err := core.NewNode(ctx, &core.BuildCfg{})
	if err != nil {
		log.Fatal(err)
	}

	list, err := net.Listen("tcp", ":0")
	if err != nil {
		log.Fatal(err)
	}

	log.Println("listening on: ", list.Addr())

	// add directory
	hash, err := coreunix.AddR(nd, "test_directory")
	if err != nil {
		log.Fatal(err)
	}

	log.Println("added directory with multihash: ", hash)

  // pin a hash
  pinlist, err := corerepo.Pin(nd, ctx, []string{hash}, true)
  if err != nil {
    log.Fatal(err)
  }

  log.Println("pinned cid: ", pinlist)

  // unpin a hash
  unpinlist, err := corerepo.Unpin(nd, ctx, []string{hash}, true)
  if err != nil {
    log.Fatal(err)
  }

  log.Println("unpinned cid: ", unpinlist)
}