1 files changed, 43 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/purescript/purescript/update.sh b/nixpkgs/pkgs/development/compilers/purescript/purescript/update.sh
new file mode 100755
index 000000000000..ea6663d810c4
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/purescript/purescript/update.sh
@@ -0,0 +1,43 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl gnused jq -I nixpkgs=.
+#
+# This script will update the purescript derivation to the latest version.
+
+set -eo pipefail
+
+# This is the directory of this update.sh script.
+script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+purescript_derivation_file="${script_dir}/default.nix"
+
+# This is the current revision of PureScript in Nixpkgs.
+old_version="$(sed -En 's/.*\bversion = "(.*?)".*/\1/p' "$purescript_derivation_file")"
+
+# This is the latest release version of PureScript on GitHub.
+new_version=$(curl --silent "https://api.github.com/repos/purescript/purescript/releases" | jq '.[0].tag_name' --raw-output | sed -e 's/v//')
+
+echo "Updating purescript from old version v${old_version} to new version v${new_version}."
+echo
+
+echo "Fetching both old and new release tarballs for Darwin and Linux in order to confirm hashes."
+echo
+old_linux_version_hash="$(nix-prefetch-url "https://github.com/purescript/purescript/releases/download/v${old_version}/linux64.tar.gz")"
+echo "v${old_version} linux tarball hash (current version): $old_linux_version_hash"
+new_linux_version_hash="$(nix-prefetch-url "https://github.com/purescript/purescript/releases/download/v${new_version}/linux64.tar.gz")"
+echo "v${new_version} linux tarball hash: $new_linux_version_hash"
+old_darwin_version_hash="$(nix-prefetch-url "https://github.com/purescript/purescript/releases/download/v${old_version}/macos.tar.gz")"
+echo "v${old_version} darwin tarball hash (current version): $old_darwin_version_hash"
+new_darwin_version_hash="$(nix-prefetch-url "https://github.com/purescript/purescript/releases/download/v${new_version}/macos.tar.gz")"
+echo "v${new_version} darwin tarball hash: $new_darwin_version_hash"
+echo
+
+echo "Replacing version and hashes in ${purescript_derivation_file}."
+sed -i -e "s/${old_linux_version_hash}/${new_linux_version_hash}/" "$purescript_derivation_file"
+sed -i -e "s/${old_darwin_version_hash}/${new_darwin_version_hash}/" "$purescript_derivation_file"
+sed -i -e "s/${old_version}/${new_version}/" "$purescript_derivation_file"
+echo
+
+echo "Finished.  Make sure you run the following commands to confirm PureScript builds correctly:"
+echo ' - `nix build -L -f ./. purescript`'
+echo ' - `nix build -L -f ./. purescript.passthru.tests.minimal-module`'
+echo ' - `sudo nix build -L -f ./. spago.passthru.tests --option sandbox relaxed`'