使用printf颜色

Question

像这样写,它输出蓝色文字:

printf "\e[1;34mThis is a blue text.\e[0m"

但是我希望在printf中定义格式:

printf '%-6s' "This is text"

现在我尝试了几种如何添加颜色的选项,但没有成功:

printf '%-6s' "\e[1;34mThis is text\e[0m"

我甚至试图将格式添加到格式但没有成功.这不起作用,我找不到任何一个例子,其中颜色被添加到printf,其中已定义格式,如我的情况.

Answer 1

我可以建议以下替代方案,而不是使用过时的终端代码.它不仅提供更易读的代码,而且还允许您将颜色信息与格式说明符分开,就像您最初预期的那样.

blue=$(tput setaf 4)
normal=$(tput sgr0)

printf "%40s\n" "${blue}This text is blue${normal}"

见我的回答这里的其他颜色

Answer 2

您将这些部件混合在一起,而不是将它们干净地分开.

printf '\e[1;34m%-6s\e[m' "This is text"

基本上,将固定的东西放在格式中,将变量填入参数中.

Answer 3

这对我有用:

printf "%b" "\e[1;34mThis is a blue text.\e[0m"

来自printf(1):

%b     ARGUMENT as a string with '\' escapes interpreted, except that octal
       escapes are of the form \0 or \0NNN

Answer 4

这是一个在终端上获得不同颜色的小程序.

#include <stdio.h>

#define KNRM  "\x1B[0m"
#define KRED  "\x1B[31m"
#define KGRN  "\x1B[32m"
#define KYEL  "\x1B[33m"
#define KBLU  "\x1B[34m"
#define KMAG  "\x1B[35m"
#define KCYN  "\x1B[36m"
#define KWHT  "\x1B[37m"

int main()
{
    printf("%sred\n", KRED);
    printf("%sgreen\n", KGRN);
    printf("%syellow\n", KYEL);
    printf("%sblue\n", KBLU);
    printf("%smagenta\n", KMAG);
    printf("%scyan\n", KCYN);
    printf("%swhite\n", KWHT);
    printf("%snormal\n", KNRM);

    return 0;
}

Answer 5

这是一个使用bash脚本打印彩色文本的小功能.您可以根据需要添加任意数量的样式,甚至可以打印标签和新行:

#!/bin/bash

# prints colored text
print_style () {

    if [ "$2" == "info" ] ; then
        COLOR="96m";
    elif [ "$2" == "success" ] ; then
        COLOR="92m";
    elif [ "$2" == "warning" ] ; then
        COLOR="93m";
    elif [ "$2" == "danger" ] ; then
        COLOR="91m";
    else #default color
        COLOR="0m";
    fi

    STARTCOLOR="\e[$COLOR";
    ENDCOLOR="\e[0m";

    printf "$STARTCOLOR%b$ENDCOLOR" "$1";
}

print_style "This is a green text " "success";
print_style "This is a yellow text " "warning";
print_style "This is a light blue with a \t tab " "info";
print_style "This is a red text with a \n new line " "danger";
print_style "This has no color";