devel/download-latest: Explicitly error if no packages can be found

Avoids letting the issue surface as more distant and perplexing errors in jq and wget.
nextstrain · Feb 5, 2025 · ae05e8c · ae05e8c
1 parent 0f54622
commit ae05e8c
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/devel/download-latest b/devel/download-latest
@@ -7,12 +7,14 @@ export PATH="$env/bin:$PATH"
 CONDA_SUBDIR="${CONDA_SUBDIR:-$("$repo"/devel/conda-subdir)}"
 export CONDA_SUBDIR
 
-wget "$(
+url="$(
     curl -fsSL https://api.anaconda.org/package/nextstrain/nextstrain-base/files | jq -r '
           map(select(.labels|index("main")))
         | map(select(.attrs.subdir == env.CONDA_SUBDIR))
+        | if length == 0 then ("error: download-latest: no packages found\n" | halt_error) else . end
         | max_by([.version, .attrs.build_number])
         | .download_url
         | if startswith("//") then "https:\(.)" else . end
     '
 )"
+wget "$url"