compose-i3.sh

#!/usr/bin/env bash

set -eu
set -o pipefail
IFS=$'\n'


source="$HOME/i3"
output="${1:-$HOME/.config/i3/config}"

function findconfig {
    local dir="$1"

    find "$dir" -mindepth 1 -maxdepth 1 -iname "*.i3" -not -iname "*.bak" | sort -n
}

function hr {
    perl -e 'print "#" . ("-#" x 39) . "\n"'
}

function apply_dir {
    local dir="$1"

    for sub in $(findconfig "$dir"); do
        if [[ -f "$sub" ]]; then
            local subnosource="${sub##$source/}"

            #echo;echo
            hr
            echo "#"
            echo "#        $subnosource"
            echo "#"
            echo

            grep -v '# vim:filetype=conf' "$sub"

            echo
            echo "#"
            echo "#        $subnosource"
            echo "#"
            #hr
            #echo;echo
        else
            apply_dir "$sub"
        fi
    done
}

function generate {
    apply_dir "$source"
    hr
}

# Generate output config
generate > "$output"

# Check output config
i3 -C -c "$output" || exit $?

set +e

# Check for duplicate keybindings
duplicate="$(grep -Eo "^bindsym.*" -hR . | cut -d' ' -f2 | sort | uniq -c | grep -v "^\s*1 " | sort -n | cut -c9-)"

if [[ -n "$duplicate" ]]; then
    pushd "$source" >/dev/null || exit 1

    echo "There are duplicate keybindings you might want to check:"

    for binding in $duplicate; do
        grep --color=auto "^bindsym $binding .*" -nR .
    done

    popd >/dev/null || exit 1
fi

# Get i3 restart key
restartkey="$(grep -Eo "^bindsym.*restart\$" "$output" | sed 's/^bindsym //g;s/ restart$//g')"

reloadkey="$(grep -Eo "^bindsym.*reload\$" "$output" | sed 's/^bindsym //g;s/ reload$//g')"

echo "i3config generated, now do $reloadkey to reload the config or do $restartkey to restart i3"