Print an outline of Rust code in the current directory

rstree.sh

#!/usr/bin/env bash

# Print an outline of Rust code in the current directory

GRAY=$(tput setaf 7)
PURPLE=$(tput setaf 5)
BOLD=$(tput bold)
CLEAR=$(tput sgr0)

rg --sort path --heading --no-line-number --glob '*.rs' '\b(fn|struct|enum|trait|impl|mod|macro_rules)\b' |\
    # Indent each line
    sed -r -s 's,^,\t,g' |\
    # Dedent each filename and make it bold purple
    sed -r -s "s,^\t(.*\.rs)$,$BOLD$PURPLE\1$CLEAR,g" |\
    # Bold the identifier and make everything else gray
    sed -r -s "s,\b((fn|struct|enum|trait|impl|mod|macro_rules!) +)([^ <\(]+)(.*),$GRAY\1$CLEAR$BOLD\3$CLEAR$GRAY\4$CLEAR,g" |\
    # Convert each tab to 4 spaces
    sed -r -s 's,\t,    ,g'