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#!/bin/sh
# Example:
# $ scripts/ci/update-stack-resolvers.sh | tee tests/stack-resolvers
STACKAGE_SNAPSHOTS_REPO=https://github.com/commercialhaskell/stackage-snapshots
tmp=/tmp/stack-resolvers
mkdir -p "$tmp"
wget -q -O- "$STACKAGE_SNAPSHOTS_REPO"/archive/master.tar.gz \
| tar -xvz --strip-components=1 --show-transformed-names \
| tee "$tmp"/all-resolvers.list
< "$tmp"/all-resolvers.list \
sed -rn 's_((lts)/([0-9]+)/([0-9]+)\.yaml)_\1 \2-\3.\4 \2-\3_p' \
| sort -V -r | uniq -f 2 > "$tmp"/resolvers.list
while read -r path lts _; do
ghc=$(cat $path | sed -rn 's/^ *compiler: +ghc-([0-9.]+)/\1/p')
printf '%-10s %s\n' "$ghc" "$lts"
done < "$tmp"/resolvers.list
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