feat: add dryrun execution mode

Signed-off-by: Olivier Vernin <[email protected]>

cmd/root.go

@@ -6,13 +6,15 @@ import (
 
  "github.com/spf13/cobra"
  "github.com/updatecli/releasepost/internal/core/config"
+ "github.com/updatecli/releasepost/internal/core/dryrun"
  "github.com/updatecli/releasepost/internal/core/engine"
  "github.com/updatecli/releasepost/internal/core/result"
 )
 
 var (
  configFile string
  e engine.Engine
+ dryRun bool
 
  rootCmd = &cobra.Command{
  Run: func(cmd *cobra.Command, args []string) {
@@ -22,6 +24,12 @@ var (
  fmt.Printf("Failed to initialize releasepost: %v", err)
  os.Exit(2)
  }
+
+ fmt.Println("Running releasepost")
+ if dryRun {
+ dryrun.Enabled = true
+ fmt.Println("Dry run mode enabled, no changelog will be saved to disk")
+ }
  err = e.Run()
  if err != nil {
  fmt.Printf("Failed to run releasepost: %v", err)
@@ -42,6 +50,7 @@ and then copy them to locally to a directory of your choice.
 
 func init() {
  rootCmd.PersistentFlags().StringVarP(&configFile, "config", "c", "", "Releasepost configuration file")
+ rootCmd.PersistentFlags().BoolVarP(&dryRun, "dry-run", "d", false, "Dry run mode")
  rootCmd.AddCommand(
  versionCmd,
  )

internal/core/changelog/helpers.go

@@ -8,6 +8,7 @@ import (
  "io"
  "os"
 
+ "github.com/updatecli/releasepost/internal/core/dryrun"
  "github.com/updatecli/releasepost/internal/core/result"
 )
 
@@ -26,15 +27,17 @@ func dataToFile(data []byte, filename string) error {
  currentChecksum := getChecksumFromFile(filename)
  newChecksum := getChecksumFromByte(data)
 
- f, err := os.Create(filename)
- if err != nil {
- fmt.Printf("creating file %s: %v", filename, err)
- return err
- }
- defer f.Close()
- _, err = f.Write(data)
- if err != nil {
- fmt.Printf("writing file %s: %v", filename, err)
+ if !dryrun.Enabled {
+ f, err := os.Create(filename)
+ if err != nil {
+ fmt.Printf("creating file %s: %v", filename, err)
+ return err
+ }
+ defer f.Close()
+ _, err = f.Write(data)
+ if err != nil {
+ fmt.Printf("writing file %s: %v", filename, err)
+ }
  }
 
  if currentChecksum == "" && newChecksum != "" {

internal/core/dryrun/main.go

@@ -0,0 +1,6 @@
+package dryrun
+
+var (
+ // Enabled is a global variable to enable or disable dry-run mode
+ Enabled bool
+)