A shell script that tries to emulate the most basic functionality of 'git grep' for Mercurial

hg-grep

#!/bin/bash

# Save the first argument as search pattern (the "what")
what=$1
shift

# Use colours if output goes to terminal
if [ -t 1 ]; then
    use_color="--color=always"
fi

# Convert the remaining positional arguments to -I arguments for 'hg locate'
declare -a patterns
for pattern in "$@"; do
    patterns[${#patterns[*]}]="-I$pattern"
done

# Display matches nicely with colours and pager
hg locate -0 "${patterns[@]}" | xargs -0 grep $use_color "$what" | less -SFRX