Merge master into staging-next

7 files changed, 190 insertions, 0 deletions

diff --git a/maintainers/scripts/haskell/regenerate-hackage-packages.sh b/maintainers/scripts/haskell/regenerate-hackage-packages.sh
new file mode 100755
index 0000000000000..462840cd24c95
--- /dev/null
+++ b/maintainers/scripts/haskell/regenerate-hackage-packages.sh
@@ -0,0 +1,37 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p coreutils haskellPackages.cabal2nix-unstable git nix -I nixpkgs=.
+
+# This script is used to regenerate nixpkgs' Haskell package set, using a tool
+# called hackage2nix. hackage2nix looks at the config files in
+# pkgs/development/haskell-modules/configuration-hackage2nix and generates
+# a Nix expression for package version specified there, using the Cabal files
+# from the Hackage database (available under all-cabal-hashes) and its
+# companion tool cabal2nix.
+#
+# Related scripts are update-hackage.sh, for updating the snapshot of the
+# Hackage database used by hackage2nix, and update-cabal2nix-unstable.sh,
+# for updating the version of hackage2nix used to perform this task.
+
+set -euo pipefail
+
+extraction_derivation='with import ./. {}; runCommand "unpacked-cabal-hashes" { } "tar xf ${all-cabal-hashes} --strip-components=1 --one-top-level=$out"'
+unpacked_hackage="$(nix-build -E "$extraction_derivation" --no-out-link)"
+config_dir=pkgs/development/haskell-modules/configuration-hackage2nix
+
+hackage2nix \
+   --hackage "$unpacked_hackage" \
+   --preferred-versions <(for n in "$unpacked_hackage"/*/preferred-versions; do cat "$n"; echo; done) \
+   --nixpkgs "$PWD" \
+   --config "$config_dir/main.yaml" \
+   --config "$config_dir/stackage.yaml" \
+   --config "$config_dir/broken.yaml" \
+   --config "$config_dir/transitive-broken.yaml"
+
+if [[ "${1:-}" == "--do-commit" ]]; then
+git add pkgs/development/haskell-modules/hackage-packages.nix
+git commit -F - << EOF
+hackage-packages.nix: Regenerate based on current config
+
+This commit has been generated by maintainers/scripts/haskell/regenerate-hackage-packages.sh
+EOF
+fi
diff --git a/maintainers/scripts/haskell/regenerate-transitive-broken-packages.sh b/maintainers/scripts/haskell/regenerate-transitive-broken-packages.sh
new file mode 100755
index 0000000000000..ed03ef5eb6af8
--- /dev/null
+++ b/maintainers/scripts/haskell/regenerate-transitive-broken-packages.sh
@@ -0,0 +1,3 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p coreutils nix gnused -I nixpkgs=.
+echo -e $(nix-instantiate --eval --strict maintainers/scripts/haskell/transitive-broken-packages.nix) | sed 's/\"//' > pkgs/development/haskell-modules/configuration-hackage2nix/transitive-broken.yaml
diff --git a/maintainers/scripts/haskell/transitive-broken-packages.nix b/maintainers/scripts/haskell/transitive-broken-packages.nix
new file mode 100644
index 0000000000000..3ddadea216f67
--- /dev/null
+++ b/maintainers/scripts/haskell/transitive-broken-packages.nix
@@ -0,0 +1,21 @@
+let
+  nixpkgs = import ../../..;
+  inherit (nixpkgs {}) pkgs lib;
+  getEvaluating = x:
+    builtins.attrNames (
+      lib.filterAttrs (
+        _: v: (builtins.tryEval (v.outPath or null)).success && lib.isDerivation v && !v.meta.broken
+      ) x
+    );
+  brokenDeps = lib.subtractLists
+    (getEvaluating pkgs.haskellPackages)
+    (getEvaluating (nixpkgs { config.allowBroken = true; }).haskellPackages);
+in
+''
+  # This file is automatically generated by
+  # maintainers/scripts/haskell/regenerate-transitive-broken-packages.sh
+  # It is supposed to list all haskellPackages that cannot evaluate because they
+  # depend on a dependency marked as broken.
+  dont-distribute-packages:
+  ${lib.concatMapStringsSep "\n" (x: "  - ${x}") brokenDeps}
+''
diff --git a/maintainers/scripts/haskell/update-cabal2nix-unstable.sh b/maintainers/scripts/haskell/update-cabal2nix-unstable.sh
new file mode 100755
index 0000000000000..4158370456024
--- /dev/null
+++ b/maintainers/scripts/haskell/update-cabal2nix-unstable.sh
@@ -0,0 +1,17 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p coreutils curl jq gnused haskellPackages.cabal2nix-unstable -I nixpkgs=.
+
+# Updates cabal2nix-unstable to the latest master of the nixos/cabal2nix repository.
+# See regenerate-hackage-packages.sh for details on the purpose of this script.
+
+set -euo pipefail
+
+# fetch current master HEAD from Github
+head_info="$(curl -H "Accept: application/vnd.github.v3+json" https://api.github.com/repos/NixOS/cabal2nix/branches/master)"
+# extract commit hash
+commit="$(jq -r .commit.sha <<< "$head_info")"
+# extract commit timestamp and convert to date
+date="$(date "--date=$(jq -r .commit.commit.committer.date <<< "$head_info")" +%F)"
+# generate nix expression from cabal file, replacing the version with the commit date
+echo '# This file defines cabal2nix-unstable, used by maintainers/scripts/haskell/regenerate-hackage-packages.sh.' > pkgs/development/haskell-modules/cabal2nix-unstable.nix
+cabal2nix "https://github.com/NixOS/cabal2nix/archive/$commit.tar.gz" | sed -e 's/version = ".*"/version = "'"unstable-$date"'"/' >> pkgs/development/haskell-modules/cabal2nix-unstable.nix
diff --git a/maintainers/scripts/haskell/update-hackage.sh b/maintainers/scripts/haskell/update-hackage.sh
new file mode 100755
index 0000000000000..a7cfecbbb0fe8
--- /dev/null
+++ b/maintainers/scripts/haskell/update-hackage.sh
@@ -0,0 +1,35 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p nix curl jq nix-prefetch-github git gnused -I nixpkgs=.
+
+# See regenerate-hackage-packages.sh for details on the purpose of this script.
+
+set -euo pipefail
+
+pin_file=pkgs/data/misc/hackage/pin.json
+current_commit="$(jq -r .commit $pin_file)"
+old_date="$(jq -r .msg $pin_file | sed 's/Update from Hackage at //')"
+git_info="$(curl -H "Accept: application/vnd.github.v3+json" https://api.github.com/repos/commercialhaskell/all-cabal-hashes/branches/hackage)"
+head_commit="$(echo "$git_info" | jq -r .commit.sha)"
+commit_msg="$(echo "$git_info" | jq -r .commit.commit.message)"
+new_date="$(echo "$commit_msg" | sed 's/Update from Hackage at //')"
+
+if [ "$current_commit" != "$head_commit" ]; then
+   url="https://github.com/commercialhaskell/all-cabal-hashes/archive/$head_commit.tar.gz"
+   hash="$(nix-prefetch-url "$url")"
+   jq -n \
+     --arg commit "$head_commit" \
+     --arg hash "$hash" \
+     --arg url "$url" \
+     --arg commit_msg "$commit_msg" \
+     '{commit: $commit, url: $url, sha256: $hash, msg: $commit_msg}' \
+     > $pin_file
+fi
+
+if [[ "${1:-}" == "--do-commit" ]]; then
+git add pkgs/data/misc/hackage/pin.json
+git commit -F - << EOF
+all-cabal-hashes: $old_date -> $new_date
+
+This commit has been generated by maintainers/scripts/haskell/update-hackage.sh
+EOF
+fi
diff --git a/maintainers/scripts/haskell/update-stackage.sh b/maintainers/scripts/haskell/update-stackage.sh
new file mode 100755
index 0000000000000..3d51ddc4338b5
--- /dev/null
+++ b/maintainers/scripts/haskell/update-stackage.sh
@@ -0,0 +1,68 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p nix curl jq nix-prefetch-github git gnused gnugrep -I nixpkgs=.
+
+set -eu -o pipefail
+
+tmpfile=$(mktemp "update-stackage.XXXXXXX")
+# shellcheck disable=SC2064
+
+stackage_config="pkgs/development/haskell-modules/configuration-hackage2nix/stackage.yaml"
+
+trap "rm ${tmpfile} ${tmpfile}.new" 0
+touch "$tmpfile" "$tmpfile.new" # Creating files here so that trap creates no errors.
+
+curl -L -s "https://stackage.org/nightly/cabal.config" >"$tmpfile"
+old_version=$(grep "# Stackage Nightly" $stackage_config | sed -E 's/.*([0-9]{4}-[0-9]{2}-[0-9]{2}).*/\1/')
+version=$(sed -rn "s/^--.*http:..(www.)?stackage.org.snapshot.nightly-//p" "$tmpfile")
+
+if [[ "$old_version" == "$version" ]]; then
+   echo "No new stackage version"
+   exit 0 # Nothing to do
+fi
+
+# Create a simple yaml version of the file.
+sed -r \
+    -e '/^--/d' \
+    -e 's|^constraints:||' \
+    -e 's|^ +|  - |' \
+    -e 's|,$||' \
+    -e '/installed$/d' \
+    -e '/^$/d' \
+    < "${tmpfile}" | sort --ignore-case >"${tmpfile}.new"
+
+cat > $stackage_config << EOF
+# Stackage Nightly $version
+# This file is auto-generated by
+# maintainers/scripts/haskell/update-stackage.sh
+default-package-overrides:
+EOF
+
+# Drop restrictions on some tools where we always want the latest version.
+sed -r \
+    -e '/ cabal-install /d' \
+    -e '/ cabal2nix /d' \
+    -e '/ cabal2spec /d' \
+    -e '/ distribution-nixpkgs /d' \
+    -e '/ git-annex /d' \
+    -e '/ hindent /d' \
+    -e '/ hledger/d' \
+    -e '/ hlint /d' \
+    -e '/ hoogle /d' \
+    -e '/ hopenssl /d' \
+    -e '/ jailbreak-cabal /d' \
+    -e '/ json-autotype/d' \
+    -e '/ language-nix /d' \
+    -e '/ shake /d' \
+    -e '/ ShellCheck /d' \
+    -e '/ stack /d' \
+    -e '/ weeder /d' \
+    < "${tmpfile}.new" >> $stackage_config
+
+if [[ "${1:-}" == "--do-commit" ]]; then
+git add $config_file
+git commit -F - << EOF
+Stackage Nightly: $old_version -> $version
+
+This commit has been generated by maintainers/scripts/haskell/update-stackage.sh
+EOF
+fi
diff --git a/maintainers/team-list.nix b/maintainers/team-list.nix
index 66cddb966d7a3..5ed98c7be98e5 100644
--- a/maintainers/team-list.nix
+++ b/maintainers/team-list.nix
@@ -96,6 +96,15 @@ with lib.maintainers; {
     scope = "Maintain GNOME desktop environment and platform.";
   };
 
+  haskell = {
+    members = [
+      maralorn
+      cdepillabout
+      sternenseemann
+    ];
+    scope = "Maintain Haskell packages and infrastructure.";
+  };
+
   home-assistant = {
     members = [
       fab