Dear reader, I'm still new to haskell, and decided to convert a simple bash script to a full-on-bells-and-whistles Haskell program (as a learning experience). As you might guess I could use some help. The program is very simple, in Bash it reads: CMDPATTERN="$@" while [[ "`pgrep --count --full "$CMDPATTERN"`" -gt 1 ]]; do sleep 5 done AKA: while there is a command running with the given string, loop. I called this script "after" and use it on the commandline to chain commands from different terminals. The Haskell version is available at https://github.com/bneijt/after What I have done: - Add Travis CI - Add a first test case using test-framework - Add commandline option parsing using "options" - Implement a fork-join behavior using parallel-io What I would like help with: - How to add a --version that reflects the after.cabal version? - Is there a library for what I'm doing in Process.hs (listing running processes, etc.)? - How to add "-p <pid>" support, so I can do "after -p 129 -p 402" (after both pids) - Should I move from exitcode-stdio-1.0 to detailed-1.0? - Any and all other hints you might have Also if you have projects you want to point to for inspiration, I'd be happy to take a look. Greetings, Bram