ci: use current code for releaser-pleaser action (#28)

The previous job always used the last release version of
releaser-pleaser. This caused two issues:

- if new flags were added to `action.yml` since the last release, the
  program errored because the flags are unknown.
- right after merging a release pr, the image reference was already
  updated, but no new container image was built yet.

This fixes both issues, by using a locally built version of
releaser-pleaser, which is always up-to-date and available.

.github/workflows/releaser-pleaser.yaml

@@ -3,6 +3,7 @@ name: releaser-pleaser
 on:
   push:
     branches: [main]
+  # TODO: use pull_request_target to avoid tainting the actual release PR with code from open feature pull requests
   pull_request:
     types:
       - edited
@@ -18,6 +19,21 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      # Build container image from current commit and replace image ref in `action.yml`
+      # Without this, any new flags in `action.yml` would break the job in this repository until the new
+      # version is released. But a new version can only be released if this job works.
+      - uses: ko-build/setup-ko@v0.7
+      - run: ko build --bare --local --tags ci github.com/apricote/releaser-pleaser/cmd/rp
+
+      - run: mkdir -p .github/actions/releaser-pleaser
+      - run: "sed -i 's|image: .*$|image: ghcr.io/apricote/releaser-pleaser:ci|g' action.yml"
+
+      # Dogfood the action to make sure it works for users.
       - name: releaser-pleaser
         uses: ./
         with:

cmd/rp/cmd/root.go

@@ -1,31 +1,45 @@
 package cmd
 
 import (
+	"fmt"
 	"log/slog"
 	"os"
+	"runtime/debug"
 
 	"github.com/spf13/cobra"
 )
 
 var logger *slog.Logger
 
-// rootCmd represents the base command when called without any subcommands
 var rootCmd = &cobra.Command{
-	Use:   "releaser-pleaser",
+	Use:     "releaser-pleaser",
-	Short: "A brief description of your application",
+	Short:   "",
-	Long: `A longer description that spans multiple lines and likely contains
+	Long:    ``,
-examples and usage of using your application. For example:
+	Version: version(),
-
+}
-Cobra is a CLI library for Go that empowers applications.
+
-This application is a tool to generate the needed files
+func version() string {
-to quickly create a Cobra application.`,
+	vcsrevision := "unknown"
-	// Uncomment the following line if your bare application
+	vcsdirty := ""
-	// has an action associated with it:
+
-	// Run: func(cmd *cobra.Command, args []string) { },
+	buildInfo, ok := debug.ReadBuildInfo()
+	if ok {
+		fmt.Println(buildInfo.String())
+		for _, setting := range buildInfo.Settings {
+			switch setting.Key {
+			case "vcs.revision":
+				vcsrevision = setting.Value
+			case "vcs.modified":
+				if setting.Value == "true" {
+					vcsdirty = " (dirty)"
+				}
+			}
+		}
+	}
+
+	return vcsrevision + vcsdirty
 }
 
-// Execute adds all child commands to the root command and sets flags appropriately.
-// This is called by main.main(). It only needs to happen once to the rootCmd.
 func Execute() {
 	err := rootCmd.Execute()
 	if err != nil {
@@ -38,13 +52,4 @@ func init() {
 		Level: slog.LevelDebug,
 	}))
 
-	// Here you will define your flags and configuration settings.
-	// Cobra supports persistent flags, which, if defined here,
-	// will be global for your application.
-
-	// rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.releaser-pleaser.yaml)")
-
-	// Cobra also supports local flags, which will only run
-	// when this action is called directly.
-	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
 }

cmd/rp/cmd/run.go

@@ -8,7 +8,6 @@ import (
 	rp "github.com/apricote/releaser-pleaser"
 )
 
-// runCmd represents the run command
 var runCmd = &cobra.Command{
 	Use:  "run",
 	RunE: run,
@@ -25,8 +24,6 @@ var (
 func init() {
 	rootCmd.AddCommand(runCmd)
 
-	// Here you will define your flags and configuration settings.
-
 	runCmd.PersistentFlags().StringVar(&flagForge, "forge", "", "")
 	runCmd.PersistentFlags().StringVar(&flagBranch, "branch", "main", "")
 	runCmd.PersistentFlags().StringVar(&flagOwner, "owner", "", "")