Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Having recently done this on a fairly large codebase that grew organically (no design, no refactoring) over the course of four years, I feel your pain.

Writing a testsuite, on any level, is nearly essential for this. If you're rewriting an existing module, you'll need to ensure it's compatible with the old one, and the only sane way to do that is to test. If the old code is monolithic, it might be difficult to test individual units, but don't let that stop you from testing at a higher level.

B::Xref helped me make sense of the interactions in the old codebase. I didn't bother with any visualization tools or graph-creation, though. I just took the output of perl -MO=Xref filename for each file, removed some of the cruft with a text editor, ran it through mpage -4 to print, and spent a day with coffee and pencil, figuring out how things worked.

Pretty much the same tactic was used on the actual code. Print it out, annotate it away from the computer, and then sit down with the notes to implement the refactoring. If your codebase is huge (mine was about 4-5k lines in several .pl and .pm files, and was still manageable) you might not want to do this, though.


In reply to Re: Analyzing large Perl code base. by dave0
in thread Analyzing large Perl code base. by dmitri

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others studying the Monastery: (6)
As of 2021-06-12 23:09 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    What does the "s" stand for in "perls"? (Whence perls)












    Results (53 votes). Check out past polls.

    Notices?