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#!/bin/sh
# ---------------------------------------------------------------------------------------------------------------------
# SPDX-License-Identifier: MIT
# ---------------------------------------------------------------------------------------------------------------------
usage () {
echo >&2 "Usage: ${0##*/} [-r EXISTING_MANIFEST_DIR] MANIFEST_DIR"
echo >&2
echo >&2 "Remove all entries from all manifests in MANIFEST_DIR which"
echo >&2 "were included in any manifests in EXISTING_MANIFEST_DIR"
echo >&2
echo >&2 "This is specifically intended for use in creation of MEL product updates"
}
process_arguments () {
existing_manifest_dir=
manifest_dir=
while getopts r:h opt; do
case "$opt" in
r)
existing_manifest_dir=$OPTARG
;;
h)
usage
exit 0
;;
\?)
usage
exit 1
;;
esac
done
shift $((OPTIND - 1))
if [ $# -ne 1 ]; then
usage
exit 1
fi
if [ ! -d "$existing_manifest_dir" ]; then
echo >&2 "Error: EXISTING_MANIFEST_DIR must be an existing directory"
exit 1
fi
manifest_dir="$1"
if [ ! -d "$manifest_dir" ]; then
echo >&2 "Error: MANIFEST_DIR must be an existing directory"
exit 1
fi
if [ "$(echo "$existing_manifest_dir/"*)" = "$existing_manifest_dir/*" ]; then
echo >&2 "Error: no manifests in EXISTING_MANIFEST_DIR"
exit 1
fi
if [ "$(echo "$manifest_dir/"*)" = "$manifest_dir/*" ]; then
echo >&2 "Error: no manifests in MANIFEST_DIR"
exit 1
fi
}
process_arguments "$@"
tempdir="$(mktemp -d -t "${0##*/}.XXXXXX")" || exit 1
trap 'rm -rf "$tempdir"' EXIT INT TERM
for extension in manifest downloads; do
cat "$existing_manifest_dir/"*.$extension 2>/dev/null | sort -u >"$tempdir/existing.$extension"
for manifest in "$manifest_dir/"*.$extension; do
if [ ! -e "$manifest" ]; then
continue
fi
manifestname="$(basename "$manifest")"
sort -u "$manifest" >"$tempdir/$manifestname.sorted"
comm -13 "$tempdir/existing.$extension" "$tempdir/$manifestname.sorted" >"$tempdir/$manifestname"
diff -u "$manifest" "$tempdir/$manifestname" >"$tempdir/$manifestname.diff"
if [ -s "$tempdir/$manifestname.diff" ]; then
echo >&2 "Lines were removed from $manifest"
mv "$tempdir/$manifestname" "$manifest"
if ! [ -s "$manifest" ]; then
echo >&2 "Manifest $manifest was empty, removed"
rm -f "$manifest"
fi
fi
done
done
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