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表中的 Bash 输出数组

tag-icon • tag-icon bash output table
表中的 Bash 输出数组

我对 bash 很陌生，我正在尝试通过创建一些小脚本来学习它。

我创建了一个小脚本来同时查找多个域的 DNS 条目。域作为属性给出。

COUNTER=0
DOMAINS=()

for domain in "$@"
do
    WOUT_WWW=$(dig "$domain" +short)
    if (( $(grep -c . <<<"$WOUT_WWW") > 1 )); then WOUT_WWW="${WOUT_WWW##*$'\n'}" ; fi

    WITH_WWW=$(dig "www.${domain}" +short)
    if (( $(grep -c . <<<"$WITH_WWW") > 1 )); then WITH_WWW="${WITH_WWW##*$'\n'}" ; fi


    DOMAINS[$COUNTER]="$domain|$WOUT_WWW|$WITH_WWW"
    COUNTER=$(($COUNTER+1))
done

现在我只想循环遍历新的“多维”数组并给出类似 mysql 表的输出：

+------------------------------+
| Row 1    | Row 2  | Row 3    |
+------------------------------+
| Value    | Value  | Value    |
+------------------------------+

我怎样才能做到这一点？

答案1

使用perl'sText::ASCIITable模块（也支持多行单元格）：

print_table() {
  perl -MText::ASCIITable -e '
    $t = Text::ASCIITable->new({drawRowLine => 1});
    while (defined($c = shift @ARGV) and $c ne "--") {
      push @header, $c;
      $cols++
    }
    $t->setCols(@header);
    $rows = @ARGV / $cols;
    for ($i = 0; $i < $rows; $i++) {
      for ($j = 0; $j < $cols; $j++) {
        $cell[$i][$j] = $ARGV[$j * $rows + $i]
      }
    }
    $t->addRow(\@cell);
    print $t' -- "$@"
}

print_table Domain 'Without WWW'    'With WWW' -- \
            "$@"   "${WOUT_WWW[@]}" "${WITH_WWW[@]}"

其中WOUT_WWW和WITH_WWW数组被构造为：

for domain do
  WOUT_WWW+=("$(dig +short "$domain")")
  WITH_WWW+=("$(dig +short "www.$domain")")
done

这使：

.---------------------------------------------------------------------.
| Domain            | Without WWW    | With WWW                       |
+-------------------+----------------+--------------------------------+
| google.com        | 216.58.208.142 |                 74.125.206.147 |
|                   |                |                 74.125.206.104 |
|                   |                |                 74.125.206.106 |
|                   |                |                 74.125.206.105 |
|                   |                |                 74.125.206.103 |
|                   |                |                  74.125.206.99 |
+-------------------+----------------+--------------------------------+
| stackexchange.com |  151.101.65.69 | stackexchange.com.             |
|                   |   151.101.1.69 |                   151.101.1.69 |
|                   | 151.101.193.69 |                 151.101.193.69 |
|                   | 151.101.129.69 |                 151.101.129.69 |
|                   |                |                  151.101.65.69 |
+-------------------+----------------+--------------------------------+
| linux.com         |  151.101.193.5 | n.ssl.fastly.net.              |
|                   |   151.101.65.5 | prod.n.ssl.us-eu.fastlylb.net. |
|                   |    151.101.1.5 |                   151.101.61.5 |
|                   |  151.101.129.5 |                                |
'-------------------+----------------+--------------------------------'

答案2

我尝试了很多变化并做了一些研究。以下代码对我来说非常有用：

for DOMAIN in "${DOMAINS[@]}"; do
    printf "%-8s\n" "${DOMAIN}"
done | sed -e 's/|/_|g' | column -t -s '_' | awk '1;! (NR%1){print "---------";}'

只是循环遍历我的数组。我使用它是sed因为我的数组值中有一个分隔符来将它们分开。但这column就是我所寻找的吗？

答案3

function printTable()
{
    local -r delimiter="${1}"
    local -r data="$(removeEmptyLines "${2}")"

    if [[ "${delimiter}" != '' && "$(isEmptyString "${data}")" = 'false' ]]
    then
        local -r numberOfLines="$(wc -l <<< "${data}")"

        if [[ "${numberOfLines}" -gt '0' ]]
        then
            local table=''
            local i=1

            for ((i = 1; i <= "${numberOfLines}"; i = i + 1))
            do
                local line=''
                line="$(sed "${i}q;d" <<< "${data}")"

                local numberOfColumns='0'
                numberOfColumns="$(awk -F "${delimiter}" '{print NF}' <<< "${line}")"

                # Add Line Delimiter

                if [[ "${i}" -eq '1' ]]
                then
                    table="${table}$(printf '%s#+' "$(repeatString '#+' "${numberOfColumns}")")"
                fi

                # Add Header Or Body

                table="${table}\n"

                local j=1

                for ((j = 1; j <= "${numberOfColumns}"; j = j + 1))
                do
                    table="${table}$(printf '#| %s' "$(cut -d "${delimiter}" -f "${j}" <<< "${line}")")"
                done

                table="${table}#|\n"

                # Add Line Delimiter

                if [[ "${i}" -eq '1' ]] || [[ "${numberOfLines}" -gt '1' && "${i}" -eq "${numberOfLines}" ]]
                then
                    table="${table}$(printf '%s#+' "$(repeatString '#+' "${numberOfColumns}")")"
                fi
            done

            if [[ "$(isEmptyString "${table}")" = 'false' ]]
            then
                echo -e "${table}" | column -s '#' -t | awk '/^\+/{gsub(" ", "-", $0)}1'
            fi
        fi
    fi
}

function removeEmptyLines()
{
    local -r content="${1}"

    echo -e "${content}" | sed '/^\s*$/d'
}

function repeatString()
{
    local -r string="${1}"
    local -r numberToRepeat="${2}"

    if [[ "${string}" != '' && "${numberToRepeat}" =~ ^[1-9][0-9]*$ ]]
    then
        local -r result="$(printf "%${numberToRepeat}s")"
        echo -e "${result// /${string}}"
    fi
}

function isEmptyString()
{
    local -r string="${1}"

    if [[ "$(trimString "${string}")" = '' ]]
    then
        echo 'true' && return 0
    fi

    echo 'false' && return 1
}

function trimString()
{
    local -r string="${1}"

    sed 's,^[[:blank:]]*,,' <<< "${string}" | sed 's,[[:blank:]]*$,,'
}

样品运行

$ cat data-1.txt
HEADER 1,HEADER 2,HEADER 3

$ printTable ',' "$(cat data-1.txt)"
+-----------+-----------+-----------+
| HEADER 1  | HEADER 2  | HEADER 3  |
+-----------+-----------+-----------+

$ cat data-2.txt
HEADER 1,HEADER 2,HEADER 3
data 1,data 2,data 3

$ printTable ',' "$(cat data-2.txt)"
+-----------+-----------+-----------+
| HEADER 1  | HEADER 2  | HEADER 3  |
+-----------+-----------+-----------+
| data 1    | data 2    | data 3    |
+-----------+-----------+-----------+

$ cat data-3.txt
HEADER 1,HEADER 2,HEADER 3
data 1,data 2,data 3
data 4,data 5,data 6

$ printTable ',' "$(cat data-3.txt)"
+-----------+-----------+-----------+
| HEADER 1  | HEADER 2  | HEADER 3  |
+-----------+-----------+-----------+
| data 1    | data 2    | data 3    |
| data 4    | data 5    | data 6    |
+-----------+-----------+-----------+

$ cat data-4.txt
HEADER
data

$ printTable ',' "$(cat data-4.txt)"
+---------+
| HEADER  |
+---------+
| data    |
+---------+

$ cat data-5.txt
HEADER

data 1

data 2

$ printTable ',' "$(cat data-5.txt)"
+---------+
| HEADER  |
+---------+
| data 1  |
| data 2  |
+---------+

参考库位于：https://github.com/gdbtek/linux-cookbooks/blob/master/libraries/util.bash

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