mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-12-25 23:49:37 -05:00
123 lines
2.8 KiB
Go
123 lines
2.8 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 main
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import (
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"fmt"
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"io"
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"log/slog"
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"os"
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"github.com/edgelesssys/constellation/v2/hack/oci-pin/internal/sums"
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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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func newMergeCmd() *cobra.Command {
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cmd := &cobra.Command{
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Use: "merge",
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Short: "Merge multiple sha256sum files that pin OCI images.",
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RunE: runMerge,
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}
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cmd.Flags().StringArray("input", nil, "Path to existing sha256sum file that should be merged.")
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cmd.Flags().String("output", "-", "Output file. If not set, the output is written to stdout.")
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must(cmd.MarkFlagRequired("input"))
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return cmd
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}
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func runMerge(cmd *cobra.Command, _ []string) error {
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flags, err := parseMergeFlags(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(fmt.Sprintf("Parsed flags: %+v", flags))
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log.Debug(fmt.Sprintf("Merging sum file from %q into %q.", flags.inputs, flags.output))
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var out io.Writer
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if flags.output == "-" {
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out = cmd.OutOrStdout()
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} else {
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f, err := os.Create(flags.output)
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if err != nil {
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return fmt.Errorf("creating output file %q: %w", flags.output, err)
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}
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defer f.Close()
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out = f
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}
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unmergedRefs, err := parseInputs(flags.inputs)
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if err != nil {
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return fmt.Errorf("reading input files: %w", err)
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}
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if err := sums.Merge(unmergedRefs, out); err != nil {
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return fmt.Errorf("creating merged sum file: %w", err)
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}
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log.Debug(fmt.Sprintf("Sum file created at %q 🤖", flags.output))
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return nil
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}
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func parseInputs(inputs []string) ([][]sums.PinnedImageReference, error) {
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var unmergedRefs [][]sums.PinnedImageReference
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for _, input := range inputs {
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refs, err := parseInput(input)
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if err != nil {
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return nil, err
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}
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unmergedRefs = append(unmergedRefs, refs)
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}
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return unmergedRefs, nil
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}
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func parseInput(input string) ([]sums.PinnedImageReference, error) {
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in, err := os.Open(input)
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if err != nil {
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return nil, fmt.Errorf("opening sum file at %q: %w", input, err)
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}
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defer in.Close()
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refs, err := sums.Parse(in)
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if err != nil {
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return nil, fmt.Errorf("parsing sums %q: %w", input, err)
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}
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return refs, nil
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}
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type mergeFlags struct {
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inputs []string
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output string
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logLevel slog.Level
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}
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func parseMergeFlags(cmd *cobra.Command) (mergeFlags, error) {
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inputs, err := cmd.Flags().GetStringArray("input")
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if err != nil {
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return mergeFlags{}, err
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}
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output, err := cmd.Flags().GetString("output")
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if err != nil {
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return mergeFlags{}, err
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}
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verbose, err := cmd.Flags().GetBool("verbose")
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if err != nil {
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return mergeFlags{}, err
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}
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logLevel := slog.LevelInfo
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if verbose {
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logLevel = slog.LevelDebug
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}
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return mergeFlags{
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inputs: inputs,
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output: output,
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logLevel: logLevel,
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}, nil
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}
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