Make prerelease checks run manually

It is annoying to make an entire workflow conditionally run based on the
head branch name. Manual it is for now.

Author: mx-moth

.github/workflows/release-branch.yaml

@@ -1,9 +1,5 @@
 name: Prerelease checks
 on:
-  pull_request:
-    branches:
-      - "release-*"
-
   workflow_dispatch:
 
 env:

docs/internal/releasing.rst

@@ -25,6 +25,9 @@ Push this branch and make a pull request on Github.
 
    $ ./scripts/release.py pre 1.2.0
 
+Manually run the 'Prerelease checks' workflow for this branch in the 'Actions' tab on Github.
+This will check that a conda package can be built from the Python package tarball.
+
 Build and publish packages
 ==========================
 

scripts/build-local-conda-package.sh

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+
+# Build a conda package from the locally build python package.
+# This is used in CI to test that the conda package can be built successfully.
+#
+# Prerequisites:
+# - Python package builds at ./dist/emsarray-X.Y.Z.tar.gz
+# - conda-forge/emsarray-feedstock cloned at ./emsarray-feedstock
+
+set -euo pipefail
+
+HERE="$( cd -- "$( dirname -- "$( realpath -- "$0" )" )" && pwd )"
+PROJECT="$( dirname -- "$HERE" )"
+
+dist_path="$PROJECT/dist"
+feedstock_path="$PROJECT/emsarray-feedstock"
+
+files_to_clean=()
+
+function main() {
+	trap cleanup EXIT
+
+	local package_path="$( get_package_path )"
+	local package_name="$( basename -- "$package_path")"
+	local package_version=$( get_package_version "$package_name" )
+
+	tmp_dir="$( mktemp -d --tmpdir "emsarray-conda-build.XXXXXXX" )"
+	files_to_clean+=( "$tmp_dir" )
+	cd "$tmp_dir"
+
+	cp -R "$feedstock_path/recipe" "$tmp_dir/recipe"
+	recipe_path="$tmp_dir/recipe/meta.yaml"
+	update_recipe "$recipe_path" "$package_path" "$package_version"
+
+	cat "$recipe_path"
+
+	conda build \
+		--override-channels \
+		--channel conda-forge \
+		"$tmp_dir"
+}
+
+function get_package_path() {
+	find "$dist_path" -name 'emsarray-*.tar.gz' -print -quit
+}
+
+function get_package_version() {
+	local package_name="$1"
+	local package_version=$(
+		echo "$package_name" \
+		| sed 's/^emsarray-\(.*\)\.tar\.gz/\1/'
+	)
+	if [[ "$package_name" == "$package_version" ]] ; then
+		echo "Could not extract version from package name!"
+		exit 1
+	fi
+	echo "$package_version"
+}
+
+function update_recipe() {
+	local recipe_path="$1"
+	local package_path="$2"
+	local package_version="$3"
+
+	sed \
+		-e 's!set version = ".*"!set version = "'"$package_version"'"!' \
+		-e 's!url: https://pypi.io/.*!url: "file://'"$package_path"'"!' \
+		-e '/sha256:/d' \
+		-i "$recipe_path"
+}
+
+function cleanup() {
+	rm -rf "${files_to_clean[@]}"
+}
+
+main