init.sh

#!/bin/bash

# shellcheck disable=SC2063
__main() {
    local _hy=$'\e[1;93m' _g=$'\e[32m' _y=$'\e[33m' _c=$'\e[36m' _be=$'\e[34m' _w=$'\e[97m' _b=$'\e[1m' _f=$'\e[m'
    local -r RE_PROJECT="${_hy}[${_g}a${_y}-${_g}z0${_y}-${_g}9_${_hy}]$_be+$_f"
    local -r RE_USER="${_hy}[${_g}a${_y}-${_g}z0${_y}-${_g}9_-${_hy}]$_be+$_f"
    local -r RE_KEYWORD="${_hy}[${_g}a${_y}-${_g}z${_hy}]$_f${_hy}[${_g}a${_y}-${_g}z0${_y}-${_g}9_-${_hy}]$_be*$_f"
    local -r RE_ANY="$_w.$_be*$_f"
    function _jb { d=${1-""} ; shift ; f=${1-""} ; shift ; printf %s "$f" "${@/#/$d}" ; }

    local -r def_project="$(basename "$(realpath .)")"
    read -r -p "[1/9] Project name     (format: $RE_PROJECT)(enter=${_c}${def_project@Q}${_f}): " val_project
    val_project="${val_project:-$def_project}"

    local def_user="${GITHUB_USER}"
    [[ -z $def_user ]] && def_user="$(git config --get user.name)"
    [[ -z $def_user ]] && def_user="$(id -nu)"

    read -r -p "[2/9] GitHub username  (format: $RE_USER)(enter=${_c}${def_user@Q}${_f}): " val_user
    read -r -p "[3/9] Project summary  (format: $RE_ANY)(enter=EMPTY): " val_desc
    read -r -p "[4/9] Author fullname  (format: $RE_ANY)(enter=${_c}${def_user@Q}${_f}): " val_author

    local def_email="$(git config --get user.email)"
    read -r -p "[5/9] Author e-mail    (format: $RE_ANY)(enter=${_c}${def_email@Q}${_f}): " val_email

    local -a val_keywords
    function __prompt_keywords {
      printf "[6/9] Project keywords (format: %s)(enter=STOP" "$RE_KEYWORD"
      [[ ${#val_keywords} -gt 0 ]] && printf ", currently $_b%s$_f" "${#val_keywords[*]}"
      printf "): \n"
    }
    while read -r -p "$(__prompt_keywords)" buf_keyword ; do
      [[ -z $buf_keyword ]] && break
      [[ ${val_keywords[*]} =~ $buf_keyword ]] || val_keywords+=("$(tr -dc <<<"$buf_keyword" a-zA-Z0-9_-)")
    done
    # shellcheck disable=SC2086
    local -r quoted_keywords="$(printf \"%s\", ${val_keywords[*]})"

    val_user="${val_user:-$def_user}"
    val_author="${val_author:-$def_user}"
    val_email="${val_email:-$def_email}"

    local -a expr=(
      "s/[*]PROJECT_NAME/$val_project/g;"
      "s/[*]PROJECT_DESCRIPTION/$val_desc/g;"
      "s|[*]PROJECT_URL|https://github.com/$val_user/$val_project|g;"
      "s/[*]AUTHOR_NAME/$val_author/g;"
      "s/[*]AUTHOR_EMAIL/$val_email/g;"
      "s/[*]CYR/$(date +%Y)/g;"
    )
    [[ ${#val_keywords} -gt 0  && $quoted_keywords != "" ]] && \
      expr+=("s/[*]KEYWORDS/${quoted_keywords%,}/;") || \
      expr+=("s/[*]KEYWORDS//;")

    find . -type f -not \( -path ./.\*/\* -or -name init.sh \) -print0 | \
      tee /dev/stderr 2> >(tr '\0' '\n' | sed -Ee 's/^.+/Processing: &/' >&2 ) | \
      xargs -0n1 sed -i -E "${expr[*]}"

    [[ -d PROJECT_NAME ]] && mv -v PROJECT_NAME "$val_project"

    local mkfile=Makefile
    local mkline0="$(IFS=' ' grep $mkfile -nm1 -Ee '^init:' | cut -f1 -d:)"
    if [[ -n $mkline0 ]] ; then
        # shellcheck disable=SC2086,SC2046
        sed -i $mkfile -Ee $(printf "%sd;" $(( mkline0 - 1 )) $mkline0 $(( mkline0 + 1 )))
        echo "Updated: $mkfile"
    fi
}

__main "$@"