marimo export to empty folder prompts for existing file #6012
Description
Describe the bug
When running marimo export and in particular marimo export html-wasm and setting the output to an existing empty folder the user is warned that index.html already exists and prompted to overwrite.
Comparing the content of index.html before and after it is noticed that the existing contents is for the index.html template.
Will you submit a PR?
- Yes
Environment
{
"marimo": "0.14.16",
"editable": false,
"OS": "Windows",
"OS Version": "11",
"Processor": "AMD64 Family 26 Model 68 Stepping 0, AuthenticAMD",
"Python Version": "3.12.10",
"Binaries": {
"Browser": "--",
"Node": "v24.1.0"
},
"Dependencies": {
"click": "8.2.1",
"docutils": "0.22",
"itsdangerous": "2.2.0",
"jedi": "0.19.2",
"markdown": "3.8.2",
"narwhals": "2.0.1",
"packaging": "25.0",
"psutil": "7.0.0",
"pygments": "2.19.2",
"pymdown-extensions": "10.16.1",
"pyyaml": "6.0.2",
"starlette": "0.47.2",
"tomlkit": "0.13.3",
"typing-extensions": "4.14.1",
"uvicorn": "0.35.0",
"websockets": "15.0.1"
},
"Optional Dependencies": {
"altair": "5.5.0",
"duckdb": "1.3.2",
"nbformat": "5.10.4",
"openai": "1.99.6",
"pandas": "2.3.1",
"polars": "1.32.2",
"pyarrow": "21.0.0",
"loro": "1.5.3",
"ruff": "0.12.8",
"sqlglot": "27.6.0"
},
"Experimental Flags": {}
}
Code to reproduce
marimo export html-wasm ./sample_notebook.py -o "./dist/sample-notebook" --mode edit