Add update script

Author: dalcinl

update.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+set -eu
+
+version=$1
+workdir="$(pwd)"
+if test -d "$version"; then
+    echo "version $version already exists!"
+    exit 1
+fi
+tempdir="$(mktemp -d)"
+trap 'rm -rf $tempdir' EXIT
+
+cd "$tempdir"
+baseurl="https://github.com/mpi4py/mpi4py/releases/download"
+curl -sL "$baseurl/$version/mpi4py-$version.tar.gz" | tar xz
+
+cd "$workdir"
+mv "$tempdir/mpi4py-$version/docs" "$version"
+ln -sf "$version" "stable"
+
+git add "$version" "stable"
+git commit -m "$version"