uv s3 sync with dotenv
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I often want to run an s3 sync in an isolated environment, I don't want to set any environment variables, I don't want anything secret in my history, and I...

Date: October 26, 2025

I often want to run an s3 sync in an isolated environment, I don’t want to set any environment variables, I don’t want anything secret in my history, and I don’t want to change my dotenv into something that exports variables, I just want s3 sync to work. dotenv run is the tool that I’ve been using for this, and this uv one liner lets it run fully isolated from the project.

one liner
─────────

```
uv tool run --from 'python-dotenv[cli]' dotenv run -- uv tool run --from awscli aws s3 sync s3://bucket data
```

multi-line
──────────

same thing formatted for readability

```
uv tool run \
  --from 'python-dotenv[cli]' \
  dotenv run -- \
uv tool run \
  --from awscli \
  aws s3 sync s3://dropper data
```

There are probably 10 ways to skin this cat, but this is what I did, if you have a better way let me know, I’ll link you below.