Oh-My-ZSH PATH has locations that aren't in .zshrc but are still in path upon echo

EDIT:

I have now deleted the $HOME/bin:/usr/local/bin: portion from line 1 of my .zshrc file. So now that line reads as export PATH=$PATH. This got rid of the duplicates, but it still doesnt explain where Mono and Postgres are being added to the path.

Here is what the path outputs in readable formatting:

/usr/local/bin:
/usr/bin:
/bin:
/usr/sbin:
/sbin:
/Library/Frameworks/Mono.framework/Versions/Current/Commands:
/Applications/Postgres.app/Contents/Versions/latest/bin

Is there another file that is handling the exportation of these paths?

ORIGINAL:

So I really couldn't come up with a very good title, so if anyone has any suggestions please leave them in the comments.

So heres my problem. I just reset my .zshrc file to the default template by using the following command.

cp ~/.oh-my-zsh/templates/zshrc.zsh-template ~/.zshrc

So here is my file contents for .zshrc

export PATH=$HOME/bin:/usr/local/bin:$PATH

export ZSH=$HOME/.oh-my-zsh

ZSH_THEME="agnoster"

plugins=(
  git
)

source $ZSH/oh-my-zsh.sh

The following files are either completely empty or have everything commented out: .zprofile, .bash_profile, .bashrc.

After running the source .zshrc command in my terminal followed by the echo $PATH command, this is my output.

/Users/jrobinson/bin:/usr/local/bin:/Users/jrobinson/bin:/usr/local/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Frameworks/Mono.framework/Versions/Current/Commands:/Applications/Postgres.app/Contents/Versions/latest/bin

Let's format this a little better so we can see what's going on:

/Users/jrobinson/bin:
/usr/local/bin:
/Users/jrobinson/bin:
/usr/local/bin:
/usr/local/bin:
/usr/bin:
/bin:
/usr/sbin:
/sbin:
/Library/Frameworks/Mono.framework/Versions/Current/Commands:
/Applications/Postgres.app/Contents/Versions/latest/bin

As you can see, some things are repeating such as /usr/local/bin & /Users/jrobinson/bin.

Also I had at one point Postgres installed on my computer, but no longer have it installed. Mono I still have and use, but I have no idea where it's being added to my path.

The only thing I'm defining in my path is: export PATH=$HOME/bin:/usr/local/bin:$PATH

So why am I getting these repeat things? I'm assuming it's because of some repeating code somewhere in some file, and I can't pin point where these repeats are occurring so I can delete them and clean up my PATH.

ALSO which is really weird, I have Composer installed on my computer as well, and I can use the composer command even though I haven't defined Composer in my path with /.composer/vendor/bin.

Solution

path_helper is a helper for constructing PATH environment variable. It's macOS exclusive.

man path_helper

Files in these directories should contain one path element per line.

Prior to reading these directories, default PATH and MANPATH values are obtained from the files /etc/paths and /etc/manpaths respectively.

A GUI app could put files into these paths. When a shell starts up, values within will be added into PATH, or MANPATH by path_helper. The whole point seems to be avoiding polluting /usr/bin or /usr/local/bin by creating symlink into them.

For bash, path_helper is called in /etc/profile on shell startup. For zsh, path_helper is called in /etc/zprofile.

Content of /etc/profile:

# System-wide .profile for sh(1)

if [ -x /usr/libexec/path_helper ]; then
    eval `/usr/libexec/path_helper -s`
fi

if [ "${BASH-no}" != "no" ]; then
    [ -r /etc/bashrc ] && . /etc/bashrc
fi

path_helper -s

-s Generate Bourne shell commands on stdout. This is the default if SHELL does not end with "csh".

References

man path_helper