initial commit

LICENSE

@@ -0,0 +1,5 @@
+Copyright © 2024 Mark Bailey <gitea.com/cerbervs>
+
+I am the sole owner of this code, and provide it with no warranty or guarantee of safety.
+You are free to use, modify, and redistribute this code, provided you attribute it's use
+in your public facing documentation.

cmd/getVersions.go

@@ -0,0 +1,103 @@
+/*
+Copyright © 2024 Mark Bailey <gitea.com/cerbervs>
+This file is part of a CLI application developed by Mark Bailey
+*/
+package cmd
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"os/exec"
+	"regexp"
+	"sort"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+type kv struct {
+	Key   string
+	Value time.Time
+}
+
+var getVersionsCmd = &cobra.Command{
+	Use:   "get-versions",
+	Short: "Get the versions of a flatpak by package name as commit hashes.",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		versions := GetVersions(args[0])
+		sortedVersions := sortByKeys(versions)
+
+		for _, k := range sortedVersions {
+			fmt.Println("Date: "+k.Value.Format(time.DateTime), "Version: "+k.Key)
+		}
+	},
+}
+
+func GetVersions(pkgName string) map[string]time.Time {
+	cmd := exec.Command("flatpak", "remote-info", "--log", "flathub", pkgName)
+	var out bytes.Buffer
+	cmd.Stdout = &out
+	err := cmd.Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+	output := out.String()
+
+	commitRegex := regexp.MustCompile(`(?m)Commit: (.*)`)
+	dateRegex := regexp.MustCompile(`(?m)Date: (.*)`)
+	_ = dateRegex
+
+	versions := make(map[string]time.Time)
+	commitMatches := commitRegex.FindAllStringSubmatch(output, -1)
+	dateMatches := dateRegex.FindAllStringSubmatch(output, -1)
+	for i, match := range commitMatches {
+		t, err := time.Parse("2006-01-02 15:04:05 -0700", dateMatches[i][1])
+		if err != nil {
+			continue
+		}
+		versions[match[1]] = t
+	}
+
+	return versions
+}
+
+func GetPreviousVersion(pkgName string) string {
+	versions := GetVersions(pkgName)
+	sortedVersions := sortByKeys(versions)
+	var previousVersion string
+
+	for i, k := range sortedVersions {
+		if i == 1 {
+			previousVersion = k.Key
+		}
+	}
+
+	return previousVersion
+}
+
+func splitByNewline(s string) []string {
+	strNormalized := regexp.
+		MustCompile("\r\n").
+		ReplaceAllString(s, "\n")
+	return regexp.
+		MustCompile("^s*\n").
+		Split(strNormalized, -1)
+}
+
+func sortByKeys(m map[string]time.Time) []kv {
+	var ss []kv
+	for k, v := range m {
+		ss = append(ss, kv{k, v})
+	}
+	sort.Slice(ss, func(i, j int) bool {
+		return ss[i].Value.After(ss[j].Value)
+	})
+
+	return ss
+}
+
+func init() {
+	rootCmd.AddCommand(getVersionsCmd)
+}

cmd/root.go

@@ -0,0 +1,99 @@
+/*
+Copyright © 2024 Mark Bailey <gitea.com/cerbervs>
+This file is part of a CLI application developed by Mark Bailey
+*/
+package cmd
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	// Flags
+	IgnoreUpgrade bool
+	Version       string
+
+	// Args
+	PkgName string
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "flatpak-downgrade",
+	Short: "Used to downgrade flatpak applications to a previous version.",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		PkgName = args[0]
+
+		if Version == "" {
+			Version = GetPreviousVersion(PkgName)
+		}
+
+		downgrade()
+	},
+}
+
+func downgrade() {
+	fmt.Println("Downgrading ", PkgName, "to ", Version)
+
+	cmd := exec.Command("flatpak", "update", "--commit="+Version, PkgName)
+
+	outpipe, _ := cmd.StdoutPipe()
+	defer outpipe.Close()
+	scanner := bufio.NewScanner(outpipe)
+
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	err := cmd.Start()
+	if err != nil {
+		log.Fatal("Start Error: ", "\nPlease try running with root privileges.")
+		panic(err)
+	}
+
+	var text string
+	for scanner.Scan() {
+		text = scanner.Text() + text
+		if strings.Contains(scanner.Text(), "Nothing to do.") {
+			os.Exit(0)
+		}
+	}
+
+	fmt.Println("Text was: " + text)
+
+	if IgnoreUpgrade {
+		mask()
+	}
+
+	fmt.Println("Downgrade successful!")
+	os.Exit(0)
+}
+
+func mask() {
+	mask := exec.Command("flatpak", "mask", PkgName)
+	maskErr := mask.Run()
+	if maskErr != nil {
+		log.Fatal("Error: ", maskErr, "\nPlease try running with root privileges.")
+	} else {
+		fmt.Println("Marked ", PkgName, " as ignored for upgrade.")
+	}
+}
+
+func Execute() {
+	err := rootCmd.Execute()
+	if err != nil {
+		os.Exit(1)
+	}
+}
+
+func init() {
+	rootCmd.Flags().BoolVarP(&IgnoreUpgrade, "ignore-upgrage", "i", false, "Mark flatpak as ignored for upgrade")
+	rootCmd.Flags().StringVarP(&Version, "version", "v", "", "Commit hash of the specific version")
+}

go.mod

@@ -0,0 +1,9 @@
+module gitea.com/cerbervs/flatpak-downgrade
+
+go 1.23.0
+
+require (
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/spf13/cobra v1.8.1 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/spf13/cobra v1.8.1 h1:e5/vxKd/rZsfSJMUX1agtjeTDf+qv1/JdBF8gg5k9ZM=
+github.com/spf13/cobra v1.8.1/go.mod h1:wHxEcudfqmLYa8iTfL+OuZPbBZkmvliBWKIezN3kD9Y=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -0,0 +1,11 @@
+/*
+Copyright © 2024 Mark Bailey <gitea.com/cerbervs>
+This file is part of a CLI application developed by Mark Bailey
+*/
+package main
+
+import "gitea.com/cerbervs/flatpak-downgrade/cmd"
+
+func main() {
+	cmd.Execute()
+}