Draft post: Conda updated?

_posts/2050-12-03-conda-updated.md

@@ -0,0 +1,18 @@
+---
+layout: post
+title: Conda updated?
+---
+
+Using a tip from
+[Travis Hathaway](https://github.com/conda/conda/issues/14418#issuecomment-2513806325),
+here is a shell one-liner to check if a conda environment is up to date:
+
+```shell
+conda update --all --dry-run --json | jq -e '.success and (.actions | length) == 0'
+```
+
+It exits (`-e`) with `0` if the environment is already updated and `1` if
+updates are available.
+
+I use this in CI so that I get an email if my `environment.yml` file is holding
+any packages back.