tjh.dev
1#! /usr/bin/env nix-shell
2#! nix-shell -i bash -p nix curl jq nix-prefetch-github git gnused gnugrep -I nixpkgs=.
3# shellcheck shell=bash
4
5set -eu -o pipefail
6
7# Stackage solver to use, LTS or Nightly
8# (should be capitalized like the display name)
9SOLVER=LTS
10TMP_TEMPLATE=update-stackage.XXXXXXX
11readonly SOLVER
12readonly TMP_TEMPLATE
13
14toLower() {
15 printf "%s" "$1" | tr '[:upper:]' '[:lower:]'
16}
17
18tmpfile=$(mktemp "$TMP_TEMPLATE")
19tmpfile_new=$(mktemp "$TMP_TEMPLATE")
20
21stackage_config="pkgs/development/haskell-modules/configuration-hackage2nix/stackage.yaml"
22
23trap 'rm "${tmpfile}" "${tmpfile_new}"' 0
24touch "$tmpfile" "$tmpfile_new" # Creating files here so that trap creates no errors.
25
26curl -L -s "https://stackage.org/$(toLower "$SOLVER")/cabal.config" >"$tmpfile"
27old_version=$(grep '^# Stackage' $stackage_config | sed -e 's/.\+ \([A-Za-z]\+ [0-9.-]\+\)$/\1/g')
28version="$SOLVER $(sed -rn "s/^--.*http:..(www.)?stackage.org.snapshot.$(toLower "$SOLVER")-//p" "$tmpfile")"
29
30if [[ "$old_version" == "$version" ]]; then
31 echo "No new stackage version"
32 exit 0 # Nothing to do
33fi
34
35echo "Updating Stackage from $old_version to $version."
36
37# Create a simple yaml version of the file.
38sed -r \
39 -e '/^--/d' \
40 -e 's|^constraints:||' \
41 -e 's|^ +| - |' \
42 -e 's|,$||' \
43 -e '/installed$/d' \
44 -e '/^$/d' \
45 < "${tmpfile}" | sort --ignore-case >"${tmpfile_new}"
46
47cat > $stackage_config << EOF
48# Stackage $version
49# This file is auto-generated by
50# maintainers/scripts/haskell/update-stackage.sh
51default-package-overrides:
52EOF
53
54# Drop restrictions on some tools where we always want the latest version.
55sed -r \
56 -e '/ cabal2nix /d' \
57 -e '/ distribution-nixpkgs /d' \
58 -e '/ jailbreak-cabal /d' \
59 -e '/ language-nix /d' \
60 -e '/ cabal-install /d' \
61 < "${tmpfile_new}" >> $stackage_config
62
63if [[ "${1:-}" == "--do-commit" ]]; then
64git add $stackage_config
65git commit -F - << EOF
66haskellPackages: stackage $old_version -> $version
67
68This commit has been generated by maintainers/scripts/haskell/update-stackage.sh
69EOF
70fi