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analyze.go
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analyze.go
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/*
Copyright 2017 Google, Inc. All rights reserved.
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 cmd
import (
"errors"
"fmt"
"os"
"strings"
"github.com/GoogleCloudPlatform/container-diff/differs"
pkgutil "github.com/GoogleCloudPlatform/container-diff/pkg/util"
"github.com/golang/glog"
"github.com/spf13/cobra"
)
var analyzeCmd = &cobra.Command{
Use: "analyze",
Short: "Analyzes an image: [image]",
Long: `Analyzes an image using the specifed analyzers as indicated via flags (see documentation for available ones).`,
Args: func(cmd *cobra.Command, args []string) error {
if err := validateArgs(args, checkAnalyzeArgNum); err != nil {
return err
}
if err := checkIfValidAnalyzer(types); err != nil {
return err
}
return nil
},
Run: func(cmd *cobra.Command, args []string) {
if err := analyzeImage(args[0], strings.Split(types, ",")); err != nil {
glog.Error(err)
os.Exit(1)
}
},
}
func checkAnalyzeArgNum(args []string) error {
if len(args) != 1 {
return errors.New("'analyze' requires one image as an argument: container-diff analyze [image]")
}
return nil
}
func analyzeImage(imageName string, analyzerArgs []string) error {
analyzeTypes, err := differs.GetAnalyzers(analyzerArgs)
if err != nil {
return err
}
cli, err := pkgutil.NewClient()
if err != nil {
return fmt.Errorf("Error getting docker client: %s", err)
}
defer cli.Close()
prepper, err := getPrepperForImage(imageName)
if err != nil {
return err
}
image, err := prepper.GetImage()
if !save {
defer pkgutil.CleanupImage(image)
}
if err != nil {
return fmt.Errorf("Error processing image: %s", err)
}
req := differs.SingleRequest{image, analyzeTypes}
analyses, err := req.GetAnalysis()
if err != nil {
return fmt.Errorf("Error performing image analysis: %s", err)
}
glog.Info("Retrieving analyses")
outputResults(analyses)
if save {
glog.Infof("Image was saved at %s", image.FSPath)
}
return nil
}
func init() {
RootCmd.AddCommand(analyzeCmd)
addSharedFlags(analyzeCmd)
}