add keep-build-dirs flag

README.md

@@ -59,6 +59,7 @@ jobs:
 | `build-dir` | The directory to build the application in. | Optional | `flatpak_app` |
 | `repo-dir` | The directory of the flatpak repository. | Optional | `repo` |
 | `state-dir` | The directory to store the build state/cache in. | Optional | `.flatpak-builder` |
+| `keep-build-dirs` | Keep build directories after the build finishes (passes `--keep-build-dirs` to flatpak-builder). Useful for debugging intermediate files. | Optional | `false` |
 | `verbose` | Enable verbosity | Optional | `false` |
 | `upload-artifact` | Whether to upload the resulting bundle or not as an artifact | Optional | `true` |
 

flatpak-builder/action.yml

@@ -56,6 +56,13 @@ inputs:
       Defines the cache-key to use.
       Defaults to flatpak-builder-${arch}-${sha256(manifestPath)}
     required: false
+  keep-build-dirs:
+    description: >
+      Keep build directories after the build finishes, passing `--keep-build-dirs` flag
+      to flatpak-builder.
+      Possible values: true, enabled, yes, y. Defaults to false.
+    required: false
+    default: "false"
   branch:
     description: The flatpak branch.
     default: "master"