On 2/6/2023 16:47, Ken Cunningham wrote:
You have probably already noted that which and type are both built in to the default zsh on Ventura and as far as I can tell from my testing here give identical results in every case. Both correctly predict the binary that will be executed in every case I tried.
Indeed, zsh is a bit special and implements both 'which' and 'type' in terms of its 'whence' builtin (which has a lot of options and can tell you pretty much anything you would ever want to know about a command's disposition, check it out.) You will notice /usr/bin/which can thus give different results to just 'which'.
What will happen when you add and remove binaries from an upstream PATH folder is a bit difficult to predict accurately. I won't try to summarize the findings only to have someone point out their idea of an exception, but it's fair to say that it's best to open a new shell to get predictable results.
You would want to start a new shell if you changed the startup files. Otherwise 'hash -r' is quite sufficient. Changing the value of PATH at runtime will do that automatically in modern shells, BTW.
- Josh
