textfmt

#!/usr/bin/env bash

set -o pipefail

declare -r EC_ILLEGAL_CMD=127       # Command not found

has_command()
{
    command -v "${1}" &> /dev/null
}

join_by()
{
    local d="${1}"; shift; echo -n "$1"; shift; printf "%s" "${@/#/$d}";
}

is_tty()
{
    [ -t "${1}" ]
}

BOLD="\033[1m"
DIM="\033[2m"
ITALIC="\033[3m"
UNDERLINED="\033[4m"
BLINK="\033[5m"
RAPID_BLINK="\033[6m"
REVERSE="\033[7m"
HIDDEN="\033[8m"
CROSSED_OUT="\033[9m"

NORMAL="\033[0m"
RESET_ALL="${NORMAL}"
RESET_BOLD="\033[21m"
RESET_DIM="\033[22m"
RESET_ITALIC="\033[23m"
RESET_UNDERLINED="\033[24m"
RESET_BLINK="\033[25m"
RESET_RAPID_BLINK="\033[26m"
RESET_REVERSE="\033[27m"
RESET_HIDDEN="\033[28m"
RESET_CROSSED_OUT="\033[29m"
RESET_FG="\033[39m"
RESET_BG="\033[49m"

BLACK="\033[30m"
RED="\033[31m"
GREEN="\033[32m"
YELLOW="\033[33m"
BLUE="\033[34m"
MAGENTA="\033[35m"
CYAN="\033[36m"
SILVER="\033[37m"

BG_BLACK="\033[40m"
BG_RED="\033[41m"
BG_GREEN="\033[42m"
BG_YELLOW="\033[43m"
BG_BLUE="\033[44m"
BG_MAGENTA="\033[45m"
BG_CYAN="\033[46m"
BG_SILVER="\033[47m"

GREY="\033[90m"
LIGHT_RED="\033[91m"
LIGHT_GREEN="\033[92m"
LIGHT_YELLOW="\033[93m"
LIGHT_BLUE="\033[94m"
LIGHT_MAGENTA="\033[95m"
LIGHT_CYAN="\033[96m"
WHITE="\033[97m"

BG_GREY="\033[100m"
BG_LIGHT_RED="\033[101m"
BG_LIGHT_GREEN="\033[102m"
BG_LIGHT_YELLOW="\033[103m"
BG_LIGHT_BLUE="\033[104m"
BG_LIGHT_MAGENTA="\033[105m"
BG_LIGHT_CYAN="\033[106m"
BG_WHITE="\033[107m"

declare -A COLORS

COLORS[bold]=1
COLORS[dim]=2
COLORS[italic]=3
COLORS[underlined]=4
COLORS[blink]=5
COLORS[rapid blink]=6
COLORS[reverse]=7
COLORS[hidden]=8
COLORS[crossed out]=9

COLORS[reset all]=0
COLORS[reset bold]=21
COLORS[reset dim]=22
COLORS[reset italic]=23
COLORS[reset underlined]=24
COLORS[reset blink]=25
COLORS[reset rapid blink]=26
COLORS[reset reverse]=27
COLORS[reset hidden]=28
COLORS[reset crossed out]=29
COLORS[reset fg]=39
COLORS[reset bg]=49

COLORS[black]=30
COLORS[red]=31
COLORS[green]=32
COLORS[yellow]=33
COLORS[blue]=34
COLORS[magenta]=35
COLORS[cyan]=36
COLORS[silver]=37

COLORS[bg black]=40
COLORS[bg red]=41
COLORS[bg green]=42
COLORS[bg yellow]=43
COLORS[bg blue]=44
COLORS[bg magenta]=45
COLORS[bg cyan]=46
COLORS[bg silver]=47

COLORS[grey]=90
COLORS[light red]=91
COLORS[light green]=92
COLORS[light yellow]=93
COLORS[light blue]=94
COLORS[light magenta]=95
COLORS[light cyan]=96
COLORS[white]=97

COLORS[bg grey]=100
COLORS[bg light red]=101
COLORS[bg light green]=102
COLORS[bg light yellow]=103
COLORS[bg light blue]=104
COLORS[bg light magenta]=105
COLORS[bg light cyan]=106
COLORS[bg white]=107

combine()
{
    local names=()
    while [ "${#}" -gt 0 ]; do
        if [ -n "${COLORS[${1}]}" ]; then
            names+=("${COLORS[${1}]}")
        fi
        shift
    done
    local esc=''
    if [ -n "${names}" ]; then
        esc+='\033['
        esc+=$(join_by ';' "${names[@]}")
        esc+='m'
    fi
    echo "${esc}"
}

__log_field_delimiter=': '
__log_headers=()
# __log_levelname=true
# __log_datetime=true

log_header_push()
{
    while [ "${#}" \> 0 ]; do
        __log_headers["${#__log_headers[@]}"]="${1}"
        shift
    done
}

log_header_pop()
{
    if [ "${#__log_headers[@]}" \> 0 ]; then
        unset __log_headers["${#__log_headers[@]}"-1]
    fi
}

log_fatal()
{
    local line=$(join_by "${__log_field_delimiter}" ${__log_levelname:+FATAL} ${__log_datetime:+"$(date +'%Y-%m-%dT%H:%M:%S%z')"} "${__log_headers[@]}" "${@}")
    if is_tty 2; then
        line="${RED}${line}${NORMAL}"
    fi
    echo -e "${line}" >&2
}

log_error()
{
    local line=$(join_by "${__log_field_delimiter}" ${__log_levelname:+ERROR} ${__log_datetime:+"$(date +'%Y-%m-%dT%H:%M:%S%z')"} "${__log_headers[@]}" "${@}")
    if is_tty 2; then
        line="$(combine 'bold' 'red')${line}${NORMAL}"
    fi
    echo -e "${line}" >&2
}

log_warning()
{
    local line=$(join_by "${__log_field_delimiter}" ${__log_levelname:+WARNING} ${__log_datetime:+"$(date +'%Y-%m-%dT%H:%M:%S%z')"} "${__log_headers[@]}" "${@}")
    if is_tty 2; then
        line="${BOLD}${YELLOW}${line}${NORMAL}"
    fi
    echo -e "${line}" >&2
}

log_info()
{
    local line=$(join_by "${__log_field_delimiter}" ${__log_levelname:+INFO} ${__log_datetime:+"$(date +'%Y-%m-%dT%H:%M:%S%z')"} "${__log_headers[@]}" "${@}")
    if is_tty 1; then
        line="${BOLD}${line}${NORMAL}"
    fi
    echo -e "${line}" >&1
}

log_debug()
{
    local line=$(join_by "${__log_field_delimiter}" ${__log_levelname:+DEBUG} ${__log_datetime:+"$(date +'%Y-%m-%dT%H:%M:%S%z')"} "${__log_headers[@]}" "${@}")
    echo -e "${line}" >&1
}

peval()
{
    local rs rv
    rs=$(eval "${1}" 2>&1); rv="${?}"
    if [ "$rv" != 0 ]; then
        log_error "${@:2:${#}}" "${1}" "[$rv]" "$rs"
        return "$rv"
    fi
    echo -n "$rs"
}

to_upper()
{
    echo "${@}" | tr '[a-z]' '[A-Z]'
}

readonly SCRIPT_NAME="$(basename $0)"

usage()
{
    printf "USAGE: $SCRIPT_NAME %s\n" "${*}" >&2
    exit
}

main()
{
    [ "${#}" == 0 ] && usage DIR
    log_header_push "$SCRIPT_NAME"
    if ! has_command dos2unix || ! has_command mac2unix; then
        log_error 'dos2unix<http://waterlan.home.xs4all.nl/dos2unix.html> required'
        exit "$EC_ILLEGAL_CMD"
    fi
    if ! has_command sponge; then
        log_error 'moreutils<https://joeyh.name/code/moreutils/> required'
        exit "$EC_ILLEGAL_CMD"
    fi
    if ! has_command uchardet; then
        log_error 'uchardet<https://www.freedesktop.org/wiki/Software/uchardet> required'
        exit "$EC_ILLEGAL_CMD"
    fi
    IFS=$'\n'
    for dir ; do
        files=$(find "${dir}" -name .git -prune -o -name .svn -prune -o -type f -exec file {} \; | grep text | grep 'with CRLF line terminators' | cut -d: -f1 2> /dev/null)
        for f in $files; do
            log_info "$(readlink -f ${f} 2> /dev/null)" "CRLF to LF"
            dos2unix -q -k -o "${f}"
        done
        files=$(find "${dir}" -name .git -prune -o -name .svn -prune -o -type f -exec file {} \; | grep text | grep 'with CR line terminators' | cut -d: -f1 2> /dev/null)
        for f in $files; do
            log_info "$(readlink -f ${f} 2> /dev/null)" "CR to LF"
            mac2unix -q -k -o "${f}"
        done
        files=$(find "${dir}" -name .git -prune -o -name .svn -prune -o -type f -exec file {} \; | grep text | cut -d: -f1 2> /dev/null)
        for f in $files; do
            if enc=$(peval "uchardet '${f}'"); then
                if [[ $(to_upper "$enc") != 'UTF-8' ]]; then
                    log_info "$(readlink -f ${f} 2> /dev/null)" "${enc} to UTF-8"
                    peval "iconv -c -f ${enc} -t UTF-8 '${f}'" | sponge "${f}"
                fi
            fi
        done
    done
}

main "${@}"