Jason Hall imjasonh

Demoing cgr.dev tag history

We're going to use the new tag history API to see tag updates to cgr.dev/chainguard/static:latest!

First, exchange your Chainguard token for a registry token. This assumes you've set up auth with chainctl auth configure-docker:

tok=$(curl -H "Authorization: Bearer $(echo 'cgr.dev' | docker-credential-cgr get)" -v "https://cgr.dev/token?scope=repository:chainguard/static:pull" | jq -r .token)

`container-report`

This is an experimental tool that emits a JSON report of the contents of an image.

It's current intended use is to be passed two images and to have their reports diffed using diff.

Example:

	package main

	import (
	"encoding/xml"
	"fmt"
	"io"
	"net/http"
	"strings"
	)

	module logrustest

	go 1.20

	require github.com/sirupsen/logrus v1.9.3

	require golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect

	package must

	import (
	"testing"

	"github.com/google/go-containerregistry/pkg/name"
	v1 "github.com/google/go-containerregistry/pkg/v1"
	)

	// must.Testing(t).Digest(img)

	// Example using our bevy of TF providers (in order):
	// - https://github.com/chainguard-dev/terraform-provider-apko
	// - https://github.com/chainguard-dev/terraform-provider-oci
	// - https://github.com/ko-build/terraform-provider-ko
	// - https://github.com/chainguard-dev/terraform-provider-cosign
	// - https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/cloud_run_service

	// This could be a resource like:
	// https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/artifact_registry_repository
	variable "repo" {

	module cp-progress

	go 1.20

	require (
	github.com/charmbracelet/bubbles v0.15.0
	github.com/google/go-containerregistry v0.14.0
	)

	require (

	function gauth() {
	gcloud auth login && gcloud auth application-default login
	}

	# Diff two image filesystems
	function cdiff-fs() {
	diff \
	<(crane export $1 - --platform ${3:-linux/amd64} \| tar -tvf - \| sort) \
	<(crane export $2 - --platform ${3:-linux/amd64} \| tar -tvf - \| sort)
	}

	$ crane export alpine - \| tar -Oxf - etc/os-release
	NAME="Alpine Linux"
	ID=alpine
	VERSION_ID=3.16.1
	PRETTY_NAME="Alpine Linux v3.16"
	HOME_URL="https://alpinelinux.org/"
	BUG_REPORT_URL="https://gitlab.alpinelinux.org/alpine/aports/-/issues"

	$ crane export ghcr.io/distroless/alpine-base - \| tar -Oxf - etc/os-release
	ID=alpine