ways to generate a program's call graph

which subroutines call which

• based on Devel::NYTProf's output (okay, NYTProf is definitely not "static analysis" — but it could help you get the job done!)
  • nytprofcg
  • StackOverflow answer
• analizo.org
  • Analizo::Command::graph
  • github.com/analizo/analizo
• github.com/koknat/callGraph — uses its own set of regexps???
• TODO: I assume that it wouldn't be difficult to use PPI to provide the "who calls who" vertices
• TODO: is there a way to use modern Language Servers that can parse Perl, to generate a call graph?

which modules use/require/do which

• metacpan.org/pod/Devel::TraceUse
• (old) metacpan.org/pod/Devel::TraceDeps
• metacpan.org/pod/App::FatPacker::Trace
• based on PPI:
  • metacpan.org/pod/Module::Extract::Use
  • (old) metacpan.org/pod/Module::Used
  • metacpan.org/pod/Perl::PrereqScanner
  • metacpan.org/pod/PPI::Xref