Add sort_items

This allows list functions to work with a sorted list.. whatever that sorting
may be.  The default is 'cat', which is purposefully not very useful.

1 files changed, 14 insertions, 6 deletions

@@ -346,6 +346,7 @@ genpage() { # genpage PAGE...
 }
 
 genlist() { # genlist PERITEM_FUNC TEMPLATE_FILE PAGE...
+    ## Generate a list.
     peritem_func="$1"
     template_file="$2"
     tmpf="$TMPD/$1"
@@ -355,12 +356,19 @@ genlist() { # genlist PERITEM_FUNC TEMPLATE_FILE PAGE...
         echo | expand "$template_file"
         return
     fi
-    for FILE; do
-        log genlist "$peritem_func" "$FILE"
-        LINK="$DOMAIN${DOMAIN:+/}${FILE%.$PAGE_RAW_EXT}"
-        META="$TMPD/$FILE.meta"
-        "$peritem_func" "$FILE"
-    done | expand "$template_file"
+    printf '%s\n' "$@" | sort_items |
+        while read -r FILE; do
+            log genlist "$peritem_func" "$FILE"
+            LINK="$DOMAIN${DOMAIN:+/}${FILE%.$PAGE_RAW_EXT}"
+            META="$TMPD/$FILE.meta"
+            "$peritem_func" "$FILE"
+        done | expand "$template_file"
+}
+
+sort_items() { # sort_items < ITEMS
+    ## Sort ITEMS separated by newlines.
+    # This function assumes that no ITEM contains a newline.
+    cat
 }
 
 index_item() { # index_item PAGE