fix: 'exec: werf-in-a-user-namespace: executable file not found in $P…

…ATH' when using buildah

Signed-off-by: Timofey Kirillov <timofey.kirillov@flant.com>

pkg/host_cleaning/host_cleanup.go

@@ -86,7 +86,12 @@ func RunAutoHostCleanup(ctx context.Context, options AutoHostCleanupOptions) err
 		args = append(args, "--docker-server-storage-path", *options.DockerServerStoragePath)
 	}
 
-	cmd := exec.Command(os.Args[0], args...)
+	executableName := os.Getenv("WERF_ORIGINAL_EXECUTABLE")
+	if executableName == "" {
+		executableName = os.Args[0]
+	}
+
+	cmd := exec.Command(executableName, args...)
 
 	var env []string
 	for _, spec := range os.Environ() {

pkg/werf/main.go

@@ -164,5 +164,11 @@ func Init(tmpDirOption, homeDirOption string) error {
 		return fmt.Errorf("error setting werf last run at timestamp: %w", err)
 	}
 
+	if os.Getenv("WERF_ORIGINAL_EXECUTABLE") == "" {
+		if err := os.Setenv("WERF_ORIGINAL_EXECUTABLE", os.Args[0]); err != nil {
+			return fmt.Errorf("error setting werf original args env var: %w", err)
+		}
+	}
+
 	return nil
 }