Update JOJ3 Configuration Schema

JOJ3-Configuration-Schema.md

@@ -1,11 +1,49 @@
 # Basic meta config file specs
 
-*Goals:* a single configuration file per assignment, which can easily be edited manually by TAs.  This file is then parsed by joj-config-generation script to generate final internal `json` configurations files.
+*Goals:* simple configuration files, which can easily be manually edited by TAs.  These files is then parsed by joj-config-generation script to generate final internal `json` configurations files.
+
+
+## repo level config file
+
+Used to discover what assignment and tasks are requested and where corresponding json config files can be found.
+ 
+-  `assignments`: list of all assignments in this repo
+- `assignment`: array of table with list of tasks
+
+Example: 
+- 4 assignments
+- no task for 0, tasks 2 3 4 5 and 6 can be tested on joj for h1, etc.
+- tree structure: `h1/2/conf.json`
+- expected joj commit: `feat[h1/2]: joj` or `fix[h2/4]: joj`
+
+```toml
+assignments = [ "h0", "h1", "h2", "h3" ]
+
+[[assignment]]
+
+[[assignment]]
+tasks = [ 2, 3, 4, 5, 6 ]
+
+[[assignment]]
+tasks = [ 1, 2, 4, 6 ]
+
+[[assignment]]
+tasks = [  2, 3, 4, 7 ]
+```
+
+Similarly for tree structure of type `hw1/ex7`
+```toml
+assignments = [ "hw0", "hw1", "hw2", "hw3" ]
+
+[[assignment]]
+
+[[assignment]]
+tasks = [ "ex2", "ex3", "ex4", "ex5", "ex6" ]
+```
+
 
 ## Assignment level
 
-- hw_prefix
-- hw_count
 - lang
 - mem_limit
 - cpu_limit