1 files changed, 19 insertions, 9 deletions
diff --git a/src/cpt-checksum b/src/cpt-checksum
index 5c6de52..488ab87 100755
--- a/src/cpt-checksum
+++ b/src/cpt-checksum
@@ -1,22 +1,32 @@
 #!/bin/sh -ef
 # Generate checksums
 
-if [ -f ./cpt-lib ]; then . ./cpt-lib; else . cpt-lib; fi
+parser_definition() {
+    setup REST help:usage -- "usage: ${0##*/} [-s] [pkg...]"
+    msg         -- '' 'Options:'
+    flag sha -s --    "Generate checksums using the depracated sha256 algorithm"
+    global_options
+}
 
-case "$1" in
-    --help|-h) out "usage: ${0##*/} [pkg...]"; exit 0 ;;
-    --version|-v) version ;;
-    '') set -- "${PWD##*/}"; export CPT_PATH=${PWD%/*}:$CPT_PATH ;;
-esac
+if [ -f ./cpt-lib ]; then . ./cpt-lib; else . cpt-lib; fi
 
+[ "$1" ] || { set -- "${PWD##*/}"; CPT_PATH=${PWD%/*}:$CPT_PATH ;}
 create_cache
 
 for pkg; do pkg_lint    "$pkg" c; done
 for pkg; do pkg_sources "$pkg" c; done
-
 for pkg; do
-    pkg_checksums "$pkg" | {
-        repo_dir=$(pkg_find "$pkg")
+    # Do not generate checksums if the 'sources' file is empty or it doesn't
+    # exist.
+    repo_dir=$(pkg_find "$pkg")
+    [ -s "$repo_dir/sources" ] || {
+        log "$pkg" "No 'sources' file, skipping checksums"
+        continue
+    }
+
+    # $sha is defined by the parser.
+    # shellcheck disable=2154
+    pkg_checksums "$pkg" "${sha:+sh256}" | {
 
         if [ -w "$repo_dir" ]; then
             tee "$repo_dir/checksums"