Add scripts/check-cabal-plan.sh

Checks whether a cabal build plan is using the latest packages from CHaP

Author: neilmayhew

scripts/check-cabal-plan.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# Usage: check-plan [PLAN.JSON]
+#
+# Check whether a cabal build plan is using the latest packages from CHaP
+#
+# The CHaP index is fetched using `curl`; the `cardano-haskell-packages` git repo isn't used
+
+PLAN=${1-dist-newstyle/cache/plan.json}
+
+PLAN_VERSIONS=$(mktemp)
+CHAP_VERSIONS=$(mktemp)
+
+trap 'rm -f "$PLAN_VERSIONS" "$CHAP_VERSIONS"' EXIT
+
+if tar --version | grep -q 'GNU tar'
+then
+  tar () { command tar --wildcards "$@"; }
+fi
+
+with-header()
+{
+  if read -r LINE
+  then
+    echo "$1"
+    echo "$LINE"
+    cat
+  fi
+}
+
+jq -r '
+  ."install-plan"[]
+  | select(."pkg-src".repo.uri // "" | match("^https://chap.intersectmbo.org"; "i"))
+  | "\(."pkg-name")/\(."pkg-version")"
+' "$PLAN" |
+  LANG=C sort -t/ -k1,1 -u -o "$PLAN_VERSIONS"
+
+curl -sSL https://chap.intersectmbo.org/01-index.tar.gz |
+  tar -tz \*.cabal |
+  cut -d/ -f1-2 |
+  LANG=C sort -t/ -k1,1 -k2,2Vr |
+  LANG=C sort -t/ -k1,1 -u -o "$CHAP_VERSIONS"
+
+LANG=C join -t/ -j1 "$PLAN_VERSIONS" "$CHAP_VERSIONS" |
+  awk -F/ '$2 != $3 {print}' |
+  with-header "Package/Plan/CHaP" |
+  column -t -s/