Staging

_conda_environment.yml

@@ -4,6 +4,7 @@ channels:
 dependencies:
   - compilers=1.8.*
   - curl=8.10.*
+  - jq=1.7.*
   - make=4.*
   - ruby=3.3.*
   - shellcheck=0.10.*

_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.

_scripts/check_conda_updated.sh

@@ -3,8 +3,6 @@
 # Check that all installed conda packages are up to date
 function check_conda_updated () {
     TEMP_FILE="$(mktemp)"
-    conda update --all --dry-run | tee "$TEMP_FILE"
-    # grep for the message that conda update prints if packages are up to date.
-    # grep exits with 0 if it is not found (meaning that updates are available).
-    grep -q "requested packages already installed" "$TEMP_FILE"
+    mamba update --all --dry-run --json | tee "$TEMP_FILE"
+    jq -e '.success and (.actions | length) == 0' "$TEMP_FILE"
 }

configure.sh

@@ -47,8 +47,7 @@ function configure_conda_environment () {
         mamba env create \
             --prefix "$CONDA_PREFIX" \
             --file "$CONDA_ENV_YML" \
-            --yes \
-            --no-default-packages
+            --yes
     fi
 }