remove generateID duplicates

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

client/solve.go

@@ -2,8 +2,6 @@ package client
 
 import (
 	"context"
-	"crypto/rand"
-	"encoding/hex"
 	"io"
 	"os"
 	"path/filepath"
@@ -12,6 +10,7 @@ import (
 
 	controlapi "github.com/moby/buildkit/api/services/control"
 	"github.com/moby/buildkit/client/llb"
+	"github.com/moby/buildkit/identity"
 	"github.com/moby/buildkit/session"
 	"github.com/moby/buildkit/session/filesync"
 	"github.com/moby/buildkit/session/grpchijack"
@@ -52,7 +51,7 @@ func (c *Client) Solve(ctx context.Context, def *llb.Definition, opt SolveOpt, s
 		return err
 	}
 
-	ref := generateID()
+	ref := identity.NewID()
 	eg, ctx := errgroup.WithContext(ctx)
 
 	statusContext, cancelStatus := context.WithCancel(context.Background())
@@ -159,14 +158,6 @@ func (c *Client) Solve(ctx context.Context, def *llb.Definition, opt SolveOpt, s
 	return eg.Wait()
 }
 
-func generateID() string {
-	b := make([]byte, 32)
-	if _, err := rand.Read(b); err != nil {
-		panic(err)
-	}
-	return hex.EncodeToString(b)
-}
-
 func prepareSyncedDirs(defs [][]byte, localDirs map[string]string) ([]filesync.SyncedDir, error) {
 	for _, d := range localDirs {
 		fi, err := os.Stat(d)

worker/runcworker/worker.go

@@ -1,8 +1,6 @@
 package runcworker
 
 import (
-	"crypto/rand"
-	"encoding/hex"
 	"encoding/json"
 	"io"
 	"os"
@@ -14,6 +12,7 @@ import (
 	runc "github.com/containerd/go-runc"
 	"github.com/docker/docker/pkg/symlink"
 	"github.com/moby/buildkit/cache"
+	"github.com/moby/buildkit/identity"
 	"github.com/moby/buildkit/worker"
 	"github.com/moby/buildkit/worker/oci"
 	"github.com/pkg/errors"
@@ -62,7 +61,7 @@ func (w *runcworker) Exec(ctx context.Context, meta worker.Meta, root cache.Moun
 		return err
 	}
 
-	id := generateID()
+	id := identity.NewID()
 	bundle := filepath.Join(w.root, id)
 
 	if err := os.Mkdir(bundle, 0700); err != nil {
@@ -148,11 +147,3 @@ func (s *forwardIO) Stdout() io.ReadCloser {
 func (s *forwardIO) Stderr() io.ReadCloser {
 	return nil
 }
-
-func generateID() string {
-	b := make([]byte, 32)
-	if _, err := rand.Read(b); err != nil {
-		panic(err)
-	}
-	return hex.EncodeToString(b)
-}