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I am running into an issue where I see command results in .zshrc being displayed twice; in trying to track down the issue I want to know how to check if .zshrc is being run (so I can tell whether it's a display issue or that .zshrc is actually ran twice).

So I am thinking some snippet that increment a counter each time .zshrc is sourced would be ideal.

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Add this to your .zshrc:

echo "$(date) -- .zshrc executed" >> $HOME/.zshrc.log

You will then see a datestamp for every time the rc file is run, sourced, or otherwise executed in the file .zshrd.log in your home directory.

  • That works perfectly; and it shows me that the source is being run twice. Not sure if I should ask a separate question on how to track down why it is running twice. I checked the usual suspects mentioned here apple.stackexchange.com/questions/175362/… but don't see .zshrc being sourced anywhere else. – AnthonyC Dec 27 '16 at 19:41
  • That might indeed be worthy of a second question. But you can also add more debug output than just echo $(date) - you could also add pstree -pal to the log. You could also perhaps move the relevant scripting from .zshrc to .zsh_profile (presuming that's a thing) or modify your scripting to set an environment variable, and only run if it's not already set. – DopeGhoti Dec 27 '16 at 20:34
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I ended up switching to tmux because the issue only exists when I start a new screen session. It had nothing to do with my .zshrc (tested by commenting out everything) and I removed various .profile & .zprofile etc. It was also terminal independent. I never figured out why it only happened in screen (tried to remove .screenrc etc).

  • I have the exact same situation - I moved all the zsh/bash/screen/xterm dotfiles except for my .zshrc. In my .zshrc, I have an include guard that should prevent it from executing its contents twice (including oh-my-zsh); I verified that it works. With xterm or screen, but no oh-my-zsh, it does exactly what I expect it to and there is no duplicate line. From there, in screen but not xterm, sourcing oh-my-zsh does introduce the problem! Does that give you any clues? I'm not sure what to test next. – John P Dec 17 '17 at 23:27
  • Also - I think you meant to say it was emulator-independent, since you also said it only applied to screen. – John P Dec 17 '17 at 23:31

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