Simon Willison’s Weblog

How to add a directory to your PATH. Classic Julia Evans piece here, answering a question which you might assume is obvious but very much isn't.

Plenty of useful tips in here, plus the best explanation I've ever seen of the three different Bash configuration options:

Bash has three possible config files: ~/.bashrc, ~/.bash_profile, and ~/.profile.

If you're not sure which one your system is set up to use, I'd recommend testing this way:

1. add echo hi there to your ~/.bashrc
2. Restart your terminal
3. If you see "hi there", that means ~/.bashrc is being used! Hooray!
4. Otherwise remove it and try the same thing with ~/.bash_profile
5. You can also try ~/.profile if the first two options don't work.

This article also reminded me to try which -a again, which gave me this confusing result for datasette:

% which -a datasette
/opt/homebrew/Caskroom/miniconda/base/bin/datasette
/Users/simon/.local/bin/datasette
/Users/simon/.local/bin/datasette

Why is the second path in there twice? I figured out how to use rg to search just the dot-files in my home directory:

rg local/bin -g '/.*' --max-depth 1

And found that I have both a .zshrc and .zprofile file that are adding that to my path:

.zshrc.backup
4:export PATH="$PATH:/Users/simon/.local/bin"

.zprofile
5:export PATH="$PATH:/Users/simon/.local/bin"

.zshrc
7:export PATH="$PATH:/Users/simon/.local/bin"

# 14th February 2025, 2:40 am / bash, julia-evans, ripgrep, zsh

How FZF and ripgrep improved my workflow (via) I’m already a keen user of ripgrep (a crazy-fast grep alternative) but fzf was new to me: it’s a CLI utility that lets you pipe in a list of strings, then gives you a typeahead search interface to search and select a string before returning the selected string to stdout when you hit enter. This means you can pipe it together with other tools to add a dynamic selection step, which has all kinds of delightful combinations. “vi $(find . | fzf)” for example opens vi against the file you selected.

# 5th July 2019, 5:51 pm / cli, unix, ripgrep

ripgrep is faster than {grep, ag, git grep, ucg, pt, sift} (via) Andrew Gallant's post from September 2016 introducing ripgrep, the command-line grep tool he wrote using Rust (on top of the Rust regular expression library also written by Andrew). ripgrep is a beautifully designed CLI interface and is crazy fast, and this post describes how it gets its performance in a huge amount of detail, right down to comparing the different algorithmic approaches used by other similar tools.

I recently learned that ripgrep ships as part of VS Code, which is why VS Code's search-across-project feature is so fast. In fact, if you dig around in the OS X package you can find the rg binary already installed on your mac:

find /Applications/Visual* | grep bin/rg

# 16th April 2019, 5:52 pm / cli, rust, ripgrep, vs-code, andrew-gallant