Allow extra data from a _pure_custom_postpath function

[marcusirgens]

When using aws-vault, it's sometimes very nice to know which profile is active. I've previously used other (slower) prompts, but I really missed having this data in pure.

However, I realise that adding support for a ton of third party stuff is not the goal of this project, so I was wondering if a simple function "plugin" hook could be added? This pull request very simply checks for a function named _pure_custom_postpath, and if it exists, it's invoked and the output is appended after the path part in the prompt.

As there's a note in the readme saying ...

Makes an excellent starting point for your own custom prompt.

... I assume that the threshold for adding stuff to pure itself is quite high, so if this is something you explicitly don't want to add I fully understand that. I'm also open to different implementations or ideas for how to potentially make pure "pluggable".

[marcusirgens]

I just now realised that #460 deals with this stuff.

[mafredri]

@marcusirgens indeed it does, and that would be the ideal solution. But nobody is working on it at the moment AFAIK.

Now, if you don't mind making your own changes / forking, it's a simple one line change 😄:

diff --git pure.zsh pure.zsh
index 2cbd7d0..d8326ae 100644
--- pure.zsh
+++ pure.zsh
@@ -135,7 +135,7 @@ prompt_pure_preprompt_render() {
 	[[ -n $prompt_pure_state[username] ]] && preprompt_parts+=($prompt_pure_state[username])
 
 	# Set the path.
-	preprompt_parts+=('%F{${prompt_pure_colors[path]}}%~%f')
+	preprompt_parts+=('%F{${prompt_pure_colors[path]}}%1~%f')
 
 	# Git branch and dirty status info.
 	typeset -gA prompt_pure_vcs_info

[marcusirgens]

diff --git pure.zsh pure.zsh> 
index 2cbd7d0..d8326ae 100644> 
--- pure.zsh> 
+++ pure.zsh> 
@@ -135,7 +135,7 @@ prompt_pure_preprompt_render() {> 
 	[[ -n $prompt_pure_state[username] ]] && preprompt_parts+=($prompt_pure_state[username])> 

 	# Set the path.
-	preprompt_parts+=('%F{${prompt_pure_colors[path]}}%~%f')
+	preprompt_parts+=('%F{${prompt_pure_colors[path]}}%1~%f')
 
 	# Git branch and dirty status info.
 	typeset -gA prompt_pure_vcs_info

I'm afraid I don't fully understand what this change does?

[mafredri]

Sorry for the confusion @marcusirgens, I thought I was replying to #562 (case of too many tabs 😅)...

---

Back to this PR, as you noticed, #460 is how we'd ideally like to solve this issue as it's more flexible. I'm not entirely opposed to having a possibility for prefix/postfix in Pure, but I'm sure we'd still see requests for changing order or removing some part entirely. A solution which is easy to use and tries to prevent user error (e.g. hide array manipulations) would be preferable here.

[sindresorhus]

// @marcusirgens