add GDrive provider support (#118)

* GDrive provider support
* More reliable basedir ownership
* Fix mimetype

vendor/cloud.google.com/go/bigquery/copy.go

@@ -0,0 +1,106 @@
+// Copyright 2016 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package bigquery
+
+import (
+	"golang.org/x/net/context"
+	bq "google.golang.org/api/bigquery/v2"
+)
+
+// CopyConfig holds the configuration for a copy job.
+type CopyConfig struct {
+	// Srcs are the tables from which data will be copied.
+	Srcs []*Table
+
+	// Dst is the table into which the data will be copied.
+	Dst *Table
+
+	// CreateDisposition specifies the circumstances under which the destination table will be created.
+	// The default is CreateIfNeeded.
+	CreateDisposition TableCreateDisposition
+
+	// WriteDisposition specifies how existing data in the destination table is treated.
+	// The default is WriteEmpty.
+	WriteDisposition TableWriteDisposition
+
+	// The labels associated with this job.
+	Labels map[string]string
+
+	// Custom encryption configuration (e.g., Cloud KMS keys).
+	DestinationEncryptionConfig *EncryptionConfig
+}
+
+func (c *CopyConfig) toBQ() *bq.JobConfiguration {
+	var ts []*bq.TableReference
+	for _, t := range c.Srcs {
+		ts = append(ts, t.toBQ())
+	}
+	return &bq.JobConfiguration{
+		Labels: c.Labels,
+		Copy: &bq.JobConfigurationTableCopy{
+			CreateDisposition:                  string(c.CreateDisposition),
+			WriteDisposition:                   string(c.WriteDisposition),
+			DestinationTable:                   c.Dst.toBQ(),
+			DestinationEncryptionConfiguration: c.DestinationEncryptionConfig.toBQ(),
+			SourceTables:                       ts,
+		},
+	}
+}
+
+func bqToCopyConfig(q *bq.JobConfiguration, c *Client) *CopyConfig {
+	cc := &CopyConfig{
+		Labels:            q.Labels,
+		CreateDisposition: TableCreateDisposition(q.Copy.CreateDisposition),
+		WriteDisposition:  TableWriteDisposition(q.Copy.WriteDisposition),
+		Dst:               bqToTable(q.Copy.DestinationTable, c),
+		DestinationEncryptionConfig: bqToEncryptionConfig(q.Copy.DestinationEncryptionConfiguration),
+	}
+	for _, t := range q.Copy.SourceTables {
+		cc.Srcs = append(cc.Srcs, bqToTable(t, c))
+	}
+	return cc
+}
+
+// A Copier copies data into a BigQuery table from one or more BigQuery tables.
+type Copier struct {
+	JobIDConfig
+	CopyConfig
+	c *Client
+}
+
+// CopierFrom returns a Copier which can be used to copy data into a
+// BigQuery table from one or more BigQuery tables.
+// The returned Copier may optionally be further configured before its Run method is called.
+func (t *Table) CopierFrom(srcs ...*Table) *Copier {
+	return &Copier{
+		c: t.c,
+		CopyConfig: CopyConfig{
+			Srcs: srcs,
+			Dst:  t,
+		},
+	}
+}
+
+// Run initiates a copy job.
+func (c *Copier) Run(ctx context.Context) (*Job, error) {
+	return c.c.insertJob(ctx, c.newJob(), nil)
+}
+
+func (c *Copier) newJob() *bq.Job {
+	return &bq.Job{
+		JobReference:  c.JobIDConfig.createJobRef(c.c),
+		Configuration: c.CopyConfig.toBQ(),
+	}
+}