Implemented an augmented.

In this case it pulls from stat.
Bad idea.
But, it's just an example.

default.augmented.do

@@ -1,9 +1,24 @@
 
 # This is meant to use metadata from git, or hg, or the filesystem, or whatever to augment the user-given metadata
 # It's meant to fill in all the auto-generatable blanks
+# Here we're reading fake data from the file metadata
 
 redo-ifchange "$1.mime"
-echo "ID: blah"
-echo "Date-Created: YYYY-MM-DD"
-echo "Date-Modified: YYYY-MM-DD"
+
+# I don't know how standard the -c option is
+modify_time="$(stat -c "%Y" "$1.mime")"
+# I can't get creation time from the system reliably
+create_time="$modify_time"
+
+# Since create time is arbitrary, this is not a good idea...
+# But, this is mostly an example for testing
+id="$create_time"
+
+# This is the date format (iso8601)
+date_format="%Y-%m-%dT%H:%M:%SZ"
+
+echo "ID: $id"
+# I don't know how standard the '@' to set based on epoch time is, but I know the -d isn't super standard
+echo "Date-Created: $(date -ud "@$create_time" "+$date_format")"
+echo "Date-Modified: $(date -ud "@$modify_time" "+$date_format")"
 cat "$1.mime"