mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-12-18 12:24:32 -05:00
86 lines
2.2 KiB
Go
86 lines
2.2 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package cmd
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import (
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"encoding/json"
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"fmt"
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"os"
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"github.com/edgelesssys/constellation/v2/internal/attestation/measurements"
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"github.com/edgelesssys/constellation/v2/internal/logger"
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"github.com/spf13/cobra"
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)
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// newMeasurementsMergeCmd creates a new merge command.
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func newMeasurementsMergeCmd() *cobra.Command {
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cmd := &cobra.Command{
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Use: "merge [flags] <measurements.json>...",
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Short: "Merge OS image measurements",
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Long: "Merge OS image measurements.",
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Args: cobra.MinimumNArgs(1),
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RunE: runMergeMeasurements,
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}
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cmd.SetOut(os.Stdout)
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cmd.Flags().String("out", "", "Optional path to write the merge result to. If not set, the result is written to stdout.")
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cmd.Flags().Bool("verbose", false, "Enable verbose output")
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return cmd
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}
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func runMergeMeasurements(cmd *cobra.Command, args []string) error {
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workdir := os.Getenv("BUILD_WORKING_DIRECTORY")
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if len(workdir) > 0 {
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must(os.Chdir(workdir))
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}
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flags, err := parseMergeMeasurementsFlags(cmd)
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if err != nil {
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return err
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}
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log := logger.NewTextLogger(flags.logLevel)
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log.Debug("Using flags", "out", flags.out, "logLevel", flags.logLevel)
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mergedMeasurements, err := readMeasurementsArgs(args)
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if err != nil {
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return fmt.Errorf("merging measurements: reading input files: %w", err)
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}
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out := cmd.OutOrStdout()
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if len(flags.out) > 0 {
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outF, err := os.Create(flags.out)
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if err != nil {
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return fmt.Errorf("merging measurements: opening output file: %w", err)
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}
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defer outF.Close()
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out = outF
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}
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if err := json.NewEncoder(out).Encode(mergedMeasurements); err != nil {
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return fmt.Errorf("merging measurements: writing output file: %w", err)
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}
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log.Info("Merged image measurements")
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return nil
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}
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func readMeasurementsArgs(paths []string) (measurements.ImageMeasurementsV2, error) {
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measuremnts := make([]measurements.ImageMeasurementsV2, len(paths))
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for i, path := range paths {
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f, err := os.Open(path)
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if err != nil {
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return measurements.ImageMeasurementsV2{}, err
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}
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defer f.Close()
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if err := json.NewDecoder(f).Decode(&measuremnts[i]); err != nil {
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return measurements.ImageMeasurementsV2{}, err
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}
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}
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return measurements.MergeImageMeasurementsV2(measuremnts...)
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}
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