refactor: expose generated code and client business logic to share with Kapacitor (#103)

* refactor: take clients out of internal

* refactor: move stdio to pkg

* Move internal/api to api

* refactor: final changes for Kapacitor to access shared functionality

* chore: regenerate mocks

* fix: bad automated refactor

* chore: extra formatting not caught by make fmt

clients/bucket_schema/update.go

@@ -0,0 +1,58 @@
+package bucket_schema
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+
+	"github.com/influxdata/influx-cli/v2/api"
+	"github.com/influxdata/influx-cli/v2/clients"
+)
+
+type UpdateParams struct {
+	clients.OrgBucketParams
+	Name           string
+	ID             string
+	Stdin          io.Reader
+	ColumnsFile    string
+	ColumnsFormat  ColumnsFormat
+	ExtendedOutput bool
+}
+
+func (c Client) Update(ctx context.Context, params UpdateParams) error {
+	cols, err := c.readColumns(params.Stdin, params.ColumnsFormat, params.ColumnsFile)
+	if err != nil {
+		return err
+	}
+
+	ids, err := c.resolveOrgBucketIds(ctx, params.OrgBucketParams)
+	if err != nil {
+		return err
+	}
+
+	var id string
+	if params.ID == "" && params.Name == "" {
+		return errors.New("measurement id or name required")
+	} else if params.ID != "" {
+		id = params.ID
+	} else {
+		id, err = c.resolveMeasurement(ctx, *ids, params.Name)
+		if err != nil {
+			return err
+		}
+	}
+
+	res, err := c.UpdateMeasurementSchema(ctx, ids.BucketID, id).
+		OrgID(ids.OrgID).
+		MeasurementSchemaUpdateRequest(api.MeasurementSchemaUpdateRequest{
+			Columns: cols,
+		}).
+		Execute()
+
+	if err != nil {
+		return fmt.Errorf("failed to update measurement schema: %w", err)
+	}
+
+	return c.printMeasurements(ids.BucketID, []api.MeasurementSchema{res}, params.ExtendedOutput)
+}