Revert "fix: [CI-10165]: support additional kaniko args from PLUGIN_ env vars (#93)" (#99)

This reverts commit 20c593c3e7.

kaniko.go

@@ -64,9 +64,6 @@ type (
 	}
 )
 
-// Excluded variables
-var excludeList = []string{"PLUGIN_PIPELINE", "PLUGIN_USERNAME", "PLUGIN_PASSWORD", "PLUGIN_TAGS", "PLUGIN_REGISTRY", "PLUGIN_ARTIFACT_FILE", "PLUGIN_REPO", "PLUGIN_BUILD_ARGS"}
-
 // labelsForTag returns the labels to use for the given tag, subject to the value of ExpandTag.
 //
 // Build information (e.g. +linux_amd64) is carried through to all labels.
@@ -227,12 +224,7 @@ func (p Plugin) Exec() error {
 	if p.Build.TarPath != "" {
 		cmdArgs = append(cmdArgs, fmt.Sprintf("--tar-path=%s", p.Build.TarPath))
 	}
-
+	
-	//Read all PLUGIN_ env vars
-	//parse them such that PLUGIN_ENV_ARG is set to the value of --env-arg
-	//Add the value of --env-arg to cmdArgs if it does not exist
-	cmdArgs = getPluginEnvVars(cmdArgs)
-
 	cmd := exec.Command("/kaniko/executor", cmdArgs...)
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
@@ -272,60 +264,3 @@ func getDigest(digestFile string) string {
 func trace(cmd *exec.Cmd) {
 	fmt.Fprintf(os.Stdout, "+ %s\n", strings.Join(cmd.Args, " "))
 }
-
-func getPluginEnvVars(cmdArgs []string) []string {
-	envVars := os.Environ()
-
-	// Iterate through environment variables
-	for _, envVar := range envVars {
-		// Check if the variable starts with PLUGIN_
-		if strings.HasPrefix(envVar, "PLUGIN_") && !contains(excludeList, envVar) {
-			// Split the variable into key and value
-			parts := strings.SplitN(envVar, "=", 2)
-			if len(parts) != 2 {
-				continue
-			}
-			key := parts[0]
-			value := parts[1]
-
-			// Trim the "PLUGIN_" prefix
-			flagName := strings.TrimPrefix(key, "PLUGIN_")
-
-			// Replace underscores with hyphens and convert to lowercase
-			flagName = strings.ReplaceAll(flagName, "_", "-")
-			flagName = strings.ToLower(flagName)
-
-			// Format the flag name with "--" prefix
-			flag := "--" + flagName
-
-			// Check if the flag already exists in cmdArgs
-			exists := false
-			for _, arg := range cmdArgs {
-				if strings.HasPrefix(arg, flag) {
-					exists = true
-					break
-				}
-			}
-
-			// If the flag does not exist, add it to cmdArgs
-			if !exists {
-				if value == "" {
-					cmdArgs = append(cmdArgs, flag)
-				} else {
-					cmdArgs = append(cmdArgs, fmt.Sprintf("%s=%s", flag, value))
-				}
-			}
-		}
-	}
-	return cmdArgs
-}
-
-// Function to check if a string is in a slice
-func contains(slice []string, str string) bool {
-	for _, s := range slice {
-		if strings.HasPrefix(str, s) {
-			return true
-		}
-	}
-	return false
-}