bash 彩色 grep -- 查看带有突出显示匹配项的整个文件
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Colorized grep -- viewing the entire file with highlighted matches
提问by zslayton
I find grep's --color=alwaysflag to be tremendously useful. However, grep only prints lines with matches (unless you ask for context lines). Given that each line it prints has a match, the highlighting doesn't add as much capability as it could.
我发现grep的--color=always标志非常有用。但是，grep 只打印带有匹配项的行（除非您要求提供上下文行）。鉴于它打印的每一行都有一个匹配项，突出显示并没有尽可能多地增加功能。
I'd really like to cata file and see the entire file with the pattern matches highlighted.
我真的很想要cat一个文件并查看整个文件，其中突出显示了模式匹配。
Is there some way I can tell grep to print every line being read regardless of whether there's a match? I know I could write a script to run grep on every line of a file, but I was curious whether this was possible with standard grep.
有什么方法可以告诉 grep 打印正在读取的每一行，而不管是否匹配？我知道我可以编写一个脚本来在文件的每一行上运行 grep，但我很好奇这是否可以使用标准grep.
回答by Ryan Oberoi
Here are some ways to do it:
以下是一些方法：
grep --color -E 'pattern|$' file
grep --color 'pattern\|$' file
egrep --color 'pattern|$' file
回答by Paused until further notice.
Here's something along the same lines. Chances are, you'll be using less anyway, so try this:
这里有一些类似的东西。有可能，无论如何你都会使用更少的，所以试试这个：
less -p pattern file
It will highlight the pattern and jump to the first occurrence of it in the file.
它将突出显示模式并跳转到文件中第一次出现的位置。
回答by ephemient
I'd like to recommend ack -- better than grep, a power search tool for programmers.
我想推荐ack —— 比 grep 更好，它是程序员的强大搜索工具。
$ ack --color --passthru --pager="${PAGER:-less -R}" pattern files
$ ack --color --passthru pattern files | less -R
$ export ACK_PAGER_COLOR="${PAGER:-less -R}"
$ ack --passthru pattern files
I love it because it defaults to recursive searching of directories (and does so much smarter than grep -r), supports full Perl regular expressions (rather than the POSIXish regex(3)), and has a much nicer context display when searching many files.
我喜欢它，因为它默认递归搜索目录（并且比 聪明得多grep -r），支持完整的 Perl 正则表达式（而不是 POSIXish regex(3)），并且在搜索许多文件时具有更好的上下文显示。
回答by kepkin
You can use my highlightscript from https://github.com/kepkin/dev-shell-essentials
您可以highlight从https://github.com/kepkin/dev-shell-essentials使用我的脚本
It's betterthan grepbecause you can highlight each match with its own color.
这比因为您可以用自己的颜色突出显示每个匹配要好。grep
$ command_here | highlight green "input" | highlight red "output"
回答by Fabien Sa
You can also create an alias. Add this function in your .bashrc (or .bash_profile on osx)
您还可以创建别名。在您的 .bashrc（或 .bash_profile 上的 osx）中添加此函数
function grepe {
grep --color -E "|$"
}
You can now use the alias like this: "ifconfig | grepe inet" or "grepe css index.html".
您现在可以像这样使用别名：“ ifconfig | grepe inet”或“ grepe css index.html”。
(PS: don't forget to source ~/.bashrcto reload bashrc on current session)
（PS：不要忘记source ~/.bashrc在当前会话中重新加载 bashrc）
回答by user2683246
Use coloutprogram: http://nojhan.github.io/colout/
使用colout程序：http: //nojhan.github.io/colout/
It is designed to add color highlights to a text stream. Given a regex and a color (e.g. "red"), it reproduces a text stream with matches highlighted. e.g:
它旨在为文本流添加颜色突出显示。给定一个正则表达式和一个颜色（例如“红色”），它会重现一个文本流，其中突出显示了匹配项。例如：
# cat logfile but highlight instances of 'ERROR' in red
colout ERROR red <logfile
You can chain multiple invocations to add multiple different color highlights:
您可以链接多个调用以添加多个不同颜色的高光：
tail -f /var/log/nginx/access.log | \
colout ' 5\d\d ' red | \
colout ' 4\d\d ' yellow | \
colout ' 3\d\d ' cyan | \
colout ' 2\d\d ' green
Or you can achieve the same thing by using a regex with N groups (parenthesised parts of the regex), followed by a comma separated list of N colors.
或者您可以通过使用带有 N 个组的正则表达式（正则表达式的括号部分），后跟一个逗号分隔的 N 种颜色列表来实现相同的目的。
vagrant status | \
colout \
'\''(^.+ running)|(^.+suspended)|(^.+not running)'\'' \
green,yellow,red
回答by user2683246
I use rcg from "Linux Server Hacks", O'Reilly. It's perfect for what you want and can highlight multiple expressions each with different colours.
我使用 O'Reilly 的“Linux Server Hacks”中的 rcg。它非常适合您想要的东西，并且可以用不同的颜色突出显示多个表情。
#!/usr/bin/perl -w
#
# regexp coloured glasses - from Linux Server Hacks from O'Reilly
#
# eg .rcg "fatal" "BOLD . YELLOW . ON_WHITE" /var/adm/messages
#
use strict;
use Term::ANSIColor qw(:constants);
my %target = ( );
while (my $arg = shift) {
my $clr = shift;
if (($arg =~ /^-/) | !$clr) {
print "Usage: rcg [regex] [color] [regex] [color] ...\n";
exit(2);
}
#
# Ugly, lazy, pathetic hack here. [Unquote]
#
$target{$arg} = eval($clr);
}
my $rst = RESET;
while(<>) {
foreach my $x (keys(%target)) {
s/($x)/$target{$x}$rst/g;
}
print
}
回答by Abhishek Jaisingh
The -zoption for grep is also pretty slick!
-zgrep的选项也非常巧妙！
cat file1 | grep -z "pattern"
回答by uronce
I added this to my .bash_aliases:
我将此添加到我的 .bash_aliases 中：
highlight() {
grep --color -E "|$"
}
回答by treulz
To highlight patterns while viewing the whole file, hcan do this.
要在查看整个文件时突出显示模式，h可以执行此操作。
Plus it uses different colors for different patterns.
此外，它为不同的图案使用不同的颜色。
cat FILE | h 'PAT1' 'PAT2' ...
You can also pipe the output of hto less -Rfor better reading.
您还可以通过管道h传输 to的输出以less -R获得更好的阅读效果。
To grep and use 1 color for each pattern, cxpgrepcould be a good fit.
要为每个模式 grep 并使用 1 种颜色，cxpgrep可能是一个很好的选择。
