updater: support multiple versions of a package in an apt repo

Some apt repos (google-cloud-sdk) have multiple versions of the same
package, so we should support that. Now we do. Also added the
google-cloud-cli-bin package.

.tools/go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/docker/docker v25.0.3+incompatible
 	github.com/egym-playground/go-prefix-writer v0.0.0-20180609083313-7326ea162eca
 	github.com/fatih/color v1.15.0
+	github.com/jamespfennell/xz v0.1.2
 	github.com/minio/minio-go/v7 v7.0.70
 	github.com/pkg/errors v0.9.1
 	github.com/spf13/cobra v1.8.0

.tools/go.sum

@@ -54,6 +54,8 @@ github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0 h1:Wqo399gCIufwto+VfwCSvsnfGpF
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0/go.mod h1:qmOFXW2epJhM0qSnUUYpldc7gVz2KMQwJ/QYCDIa7XU=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/jamespfennell/xz v0.1.2 h1:iCw5kScLfGCceOKgQaGuj5RilAAlV4iiwauYntak2oU=
+github.com/jamespfennell/xz v0.1.2/go.mod h1:DhpWvZY1xDkK/6BREFl3c3R/fZh7IBdYq2m7xh4uLl0=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.17.6 h1:60eq2E/jlfwQXtvZEeBUYADs+BwKBWURIY+Gj2eRGjI=

.tools/internal/resolver/apt/apt.go

@@ -23,12 +23,25 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"os"
+	"path/filepath"
 	"strconv"
 	"strings"
 
+	"github.com/blang/semver/v4"
+	logger "github.com/charmbracelet/log"
+	"github.com/jamespfennell/xz"
+
 	"pault.ag/go/debian/control"
 )
 
+// log is the logger for this package.
+var log = logger.NewWithOptions(os.Stderr, logger.Options{
+	ReportCaller:    true,
+	ReportTimestamp: true,
+	Level:           logger.DebugLevel,
+})
+
 // Repository is a parsed version of a sources.list entry.
 type Repository struct {
 	// URL is the URL of the repository.
@@ -79,14 +92,14 @@ func GetPackageVersion(l Lookup) (string, error) {
 	var i *index
 	for _, index := range rel.Indexes {
 		for _, comp := range rel.Components {
-			if index.Path == fmt.Sprintf("%s/binary-%s/Packages.gz", comp, l.Architecture) {
+			if strings.HasPrefix(index.Path, fmt.Sprintf("%s/binary-%s/Packages", comp, l.Architecture)) {
 				i = &index
 				break
 			}
 		}
 	}
 	if i == nil {
-		return "", fmt.Errorf("failed to find Packages.gz index")
+		return "", fmt.Errorf("failed to find Packages index")
 	}
 
 	// Find the package in the index.
@@ -95,13 +108,39 @@ func GetPackageVersion(l Lookup) (string, error) {
 		return "", fmt.Errorf("failed to parse packages: %w", err)
 	}
 
+	var latestVersion *semver.Version
 	for _, p := range packages {
-		if p.Name == l.Package {
-			return p.Version, nil
+		if p.Name != l.Package {
+			continue
+		}
+
+		plog := log.With("package", p.Name, "version", p.Version)
+		plog.Debug("found package")
+
+		sv, err := semver.ParseTolerant(p.Version)
+		if err != nil {
+			plog.With("error", err).Warn("failed to parse version, skipping")
+			// Can't compare it, skip it.
+			continue
+		}
+
+		// Start w/ this version if it's the first one.
+		if latestVersion == nil {
+			latestVersion = &sv
+			continue
+		}
+
+		// If this version is greater than the latest, update it.
+		if sv.GT(*latestVersion) {
+			latestVersion = &sv
 		}
 	}
 
-	return "", nil
+	if latestVersion == nil {
+		return "", fmt.Errorf("failed to find package: %s", l.Package)
+	}
+
+	return latestVersion.String(), nil
 }
 
 // getRepositoryFromSourcesEntry returns a repository from a sources
@@ -132,7 +171,7 @@ func getRepositoryFromSourcesEntry(entry string) (*Repository, error) {
 }
 
 // parseRelease parses the Release file for the given repository.
-func parseRelease(r *Repository, l Lookup) (*release, error) {
+func parseRelease(r *Repository, _ Lookup) (*release, error) {
 	// TODO(jaredallard): InRelease?
 	releaseURL := fmt.Sprintf("%s/dists/%s/Release", r.URL, r.Distribution)
 
@@ -230,11 +269,21 @@ func parsePackages(p *index) ([]Package, error) {
 	defer resp.Body.Close()
 
 	r := resp.Body
-	if strings.HasSuffix(p.Path, ".gz") {
+	switch filepath.Ext(p.Path) {
+	case ".gz":
 		r, err = gzip.NewReader(r)
 		if err != nil {
 			return nil, fmt.Errorf("failed to create gzip reader: %w", err)
 		}
+
+	case ".xz":
+		r = xz.NewReader(r)
+	case "":
+		// We don't need to handle compression if there is none.
+		break
+
+	default:
+		return nil, fmt.Errorf("unsupported extension for index: %s", filepath.Ext(p.Path))
 	}
 
 	// Parse the index.

app-admin/google-cloud-cli-bin/google-cloud-cli-bin-476.0.0.ebuild

@@ -0,0 +1,33 @@
+# Copyright 2020-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DESCRIPTION="Interact with the Google Cloud Platform"
+HOMEPAGE="https://cloud.google.com/cli"
+SITE="https://dl.google.com/dl/cloudsdk/channels/rapid/downloads"
+SRC_URI="
+amd64? ( ${SITE}/google-cloud-cli-${PV}-linux-x86_64.tar.gz )
+arm64? ( ${SITE}/google-cloud-cli-${PV}-linux-arm.tar.gz )
+"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="amd64 arm64 arm"
+
+QA_PREBUILT="
+google-cloud-sdk/bin/anothoscli
+google-cloud-sdk/bin/gcloud-crc32c
+"
+RESTRICT="bindist mirror"
+S="${WORKDIR}"
+
+src_install() {
+  mkdir -p "${D}/opt/google-cloud-sdk"
+  cp -r "${S}/google-cloud-sdk/"* "${D}/opt/google-cloud-sdk" || die "Install failed!"
+  dosym /opt/google-cloud-sdk/bin/gcloud /usr/bin/gcloud
+  dosym /opt/google-cloud-sdk/bin/gsutil /usr/bin/gsutil
+
+  chmod 4755 /opt/google-cloud-sdk/bin/gsutil
+  chmod 4755 /opt/google-cloud-sdk/bin/gcloud
+}

packages.yml

@@ -8,6 +8,11 @@ app-admin/1password:
   options:
     repository: "deb https://downloads.1password.com/linux/debian/amd64 stable main"
     package: 1password
+app-admin/google-cloud-cli-bin:
+  resolver: apt
+  options:
+    repository: "deb https://packages.cloud.google.com/apt cloud-sdk main"
+    package: google-cloud-cli
 app-admin/op-cli-bin:
   resolver: apt
   options: