Skip to content
grfshgrfsh

Introduction

grfsh is a Unix shell written in Rust. It reads bash style scripts, gives you a comfortable interactive shell without plugins, and adds a set of table commands whose pipelines carry typed rows.

Terminal window
$ files src -r | where name =~ .rs | sort-by size -r | first 3 | select name size
name        size
shell.rs   14 KB
sys.rs     13 KB
check.rs  8.7 KB

What you get:

  • Scripting with the bash syntax most scripts use: functions, [[ ]], case, indexed and associative arrays, parameter expansion operators, arithmetic, brace expansion, here documents, process substitution, trap and set -euo pipefail.
  • An interactive shell with autosuggestions, syntax highlighting, context aware completion, a z command, abbreviations and themed prompts with right and transient prompts.
  • Job control with Ctrl-Z, fg, bg, jobs and wait.
  • Typed tables from files, procs, load and from, filtered and reshaped with where, sort-by, select, group-by and math. Any other program in the pipeline receives plain text.
  • A script checker, grfsh --check script.sh, that reports syntax errors and bash features grfsh does not support without running anything.

grfsh depends on two crates, rustyline and libc, starts in about 2 ms and is a single static binary on Linux.

Continue with Installation, or read Migrating from bash if you want to know what changes for your existing setup.