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41 changes: 31 additions & 10 deletions scripts/diffcheck.sh
Original file line number Diff line number Diff line change
@@ -1,15 +1,36 @@
#!/bin/bash

scripts/buildtable.pl >/tmp/table.mediawiki 2> /dev/null
diff README.mediawiki /tmp/table.mediawiki | grep '^[<>] |' >/tmp/after.diff || true
if git checkout HEAD^ && scripts/buildtable.pl >/tmp/table.mediawiki 2>/dev/null; then
diff README.mediawiki /tmp/table.mediawiki | grep '^[<>] |' >/tmp/before.diff || true
newdiff=$(diff -s /tmp/before.diff /tmp/after.diff -u | grep '^+')
if [ -n "$newdiff" ]; then
echo "$newdiff"
exit 1
fi
echo "README table matches expected table from BIP files"
set -Eeuo pipefail

after_diff="$(mktemp)"
before_diff="$(mktemp)"
table_current="$(mktemp)"
table_prev="$(mktemp)"

tmpdir="$(mktemp -d)"
cleanup() {
git worktree remove --force "$tmpdir" >/dev/null 2>&1 || true
rm -f "$table_current" "$table_prev" "$before_diff" "$after_diff" >/dev/null 2>&1 || true
}
trap cleanup EXIT

# Build table from current workspace
scripts/buildtable.pl >"$table_current" 2> /dev/null
diff README.mediawiki "$table_current" | grep '^[<>] |' >"$after_diff" || true

# Build table from previous commit using a detached worktree
if git worktree add --detach "$tmpdir" HEAD^ >/dev/null 2>&1; then
(
cd "$tmpdir"
scripts/buildtable.pl >"$table_prev" 2>/dev/null
)
diff README.mediawiki "$table_prev" | grep '^[<>] |' >"$before_diff" || true
newdiff=$(diff -s "$before_diff" "$after_diff" -u | grep '^\+')
if [ -n "$newdiff" ]; then
echo "$newdiff"
exit 1
fi
echo "README table matches expected table from BIP files"
else
echo 'Cannot build previous commit table for comparison'
exit 1
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