From 5bc944b1038307dd41578bac1b105b9868a2a6fa Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Mon, 20 Sep 2021 19:40:51 +0200
Subject: clean-cache: also check size and checksum

---
 clean-cache | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/clean-cache b/clean-cache
index d2c9b3c..d580d4c 100755
--- a/clean-cache
+++ b/clean-cache
@@ -7,4 +7,33 @@ find "${mirror_dir}" -type f -printf '%h\n' \
 | sort -u \
 | while read -r repo_dir; do
   paccache -v -r -k 2 -c "${repo_dir}"
+  if [ -z "${repo_dir##*/os/*}" ]; then
+    repo="${repo_dir%%/os/*}"
+    repo="${repo##*/}"
+  else
+    repo="${repo_dir##*/}"
+  fi
+  curl \
+    --resolve 'arch-mirror.home.eckner.net:80:127.0.0.1' \
+    -Ss 'http://arch-mirror.home.eckner.net/'"${repo_dir#${mirror_dir}/}/${repo}"'.db' \
+  | tar -Oxz \
+  | sed -n '
+    /^%\(FILENAME\|CSIZE\|SHA256SUM\)%$/,/^$/p
+  ' \
+  | grep -v '^%.*%$' \
+  | grep -vxF '' \
+  | sed '
+    N;N
+    s@\n@ @g
+  ' \
+  | while read -r file size sum; do
+    [ -f "${repo_dir}/${file}" ] || continue
+    if stat -c'%s' "${repo_dir}/${file}" \
+    | grep -qxF "${size}" \
+    && printf '%s  %s/%s\n' "${sum}" "${repo_dir}" "${file}" \
+    | sha256sum -c --quiet; then
+      continue
+    fi
+    rm "${file}"
+  done
 done
-- 
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