kakoune/rc/core/formatter.kak

decl -docstring "shell command to which the contents of the current buffer is piped" \
    str formatcmd

def format -docstring "Format the contents of the current buffer" %{ eval -draft %{
    %sh{
        if [ -n "${kak_opt_formatcmd}" ]; then
            ## Save the current position of the cursor
            readonly x=$((kak_cursor_column - 1))
            readonly y="${kak_cursor_line}"

            path_file_tmp=$(mktemp "${TMPDIR:-/tmp}"/kak-formatter-XXXXXX)
            printf %s\\n "
                write \"${path_file_tmp}\"

                %sh{
                    readonly path_file_out=\$(mktemp \"${TMPDIR:-/tmp}\"/kak-formatter-XXXXXX)

                    if cat \"${path_file_tmp}\" | eval \"${kak_opt_formatcmd}\" > \"\${path_file_out}\"; then
                        printf '%s\\n' \"exec \\%|cat<space>'\${path_file_out}'<ret>\"
                        printf '%s\\n' \"%sh{ rm -f '\${path_file_out}' }\"
                        ## Try to restore the position of the cursor as it was prior to formatting
                        printf '%s\\n' 'exec gg ${y}g ${x}l'
                    else
                        printf '%s\\n' \"
                            eval -client '${kak_client}' echo -color Error formatter returned an error (\$?)
                        \"
                        rm -f \"\${path_file_out}\"
                    fi

                    rm -f \"${path_file_tmp}\"
                }
            "
        fi
    }
} }