Complete the missing copies list with all levels of inclusion

[rooksdo]

Only the first level of missing copies is displayed
When a program references a copy that contains another copy, if the embedded copy is missing it won't display in the missing copy list.

How to reproduce

       IDENTIFICATION DIVISION.
       PROGRAM-ID. DVZZMFT0.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       COPY COPY1.
       PROCEDURE DIVISION.
           DISPLAY final-var OF group3 OF group2 OF group1
           GOBACK
           .
       END PROGRAM DVZZMFT0.    

COPY1

 01 group1.
       COPY COPY2.

COPY2

    05 group2.
          COPY COPY3.

COPY3

       10 group3.
                15 final-var PIC X.

Expected result
Missing copys at all levels of inclusion should be listed in the Missing Copies list.

[fm-117]

@rooksdo @smedilol Should also a diagnostic be added on the "parent" COPY directive to signal it has missing copy at some point in its hierarchy ?

[smedilol]

Yes we expect a diagnostic Failed to load COPY : Cobol source file not found xxxx.
Same behavior that when a copy is missing in a program.

[fm-117]

Well it's a bit different, you may end up with several missing copies for one single copy directive so either we add as many diagnostics as missing copies on that single copy directive or we add a new type of diagnostic that would aggregate all the missing copies.
Besides, using the same text as the usual missing copy message may confuse the user: in the example the copy "COPY1" is there but we'll still end up with a Failed to load COPY : Cobol source file not found COPY3 message on it. If the user does not read carefully, he may think that COPY1 is missing instead of COPY3.
In fact I think the best way is to have a new diagnostic for those dependent missing copies and create one instance of it for each dependent missing copy found.

[fm-117]

After discussing this issue, we'll go for:

• one separate diagnostic for each missing copy
• new diagnostic message: Error in COPY 'parentCopy' : failed to load dependent copy 'dependentCopy'