? ? Linux操作系統(tǒng)中去掉各類文件中的注釋這個(gè)功能比較常用，通常用在查看一個(gè)較長(zhǎng)的文件，又不想看注釋的情況。通常這些文件包括C語(yǔ)言編寫的*.c、*.h文件、cpp文件、*.xml文件、*.sh shell腳本文件、*.ini *.conf配置文件、*.php *.py *.pl等編程語(yǔ)言編寫的文件以及無(wú)擴(kuò)展名的一些可執(zhí)行文件等。

????實(shí)現(xiàn)這個(gè)功能并不復(fù)雜，通常注釋風(fēng)格就那么幾種，在編寫腳本過(guò)程中只需要編寫出合適的正則表達(dá)式以及運(yùn)用適當(dāng)?shù)奈谋咎幚砉ぞ?#xff08;grep、sed等）即可。

????針對(duì)幾種常見(jiàn)的注釋風(fēng)格編寫一個(gè)腳本文件代替cat更會(huì)省力一些。

腳本如下：

此腳本可以從GitHub上獲取，歡迎issue、fork、star：https://github.com/DingGuodong/LinuxBashShellScriptForOps/blob/master/functions/string/noComment2.sh

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#!/bin/bash #?delete?all?spaces?and?comments?of?specialized?file,?using?with?$@?filename DEBUG=false if?${DEBUG}?;?then ????old_PS4=$PS4??#?system?builtin?variable?does?not?need?'${var}'?expression #????export?PS4='+${BASH_SOURCE}:${LINENO}:${FUNCNAME[0]}:?' ????export?PS4='+${LINENO}:?${FUNCNAME[0]}:?'?#?if?there?is?only?one?bash?script,?do?not?display?${BASH_SOURCE} ????_XTRACE_FUNCTIONS=$(set?+o?|?grep?xtrace) ????set?-o?xtrace fi function?is_file_exist(){ ????test?-f?$1?||?echo?"ls:?cannot?access?$file:?No?such?file?or?directory"?&&?exit?1 } function?dos2unix_text_file_format_converter(){ ????if?cat?-A?${file}?|?grep?'\^M\\$'?>/dev/null?||?file?${file}?|?grep?"with?CRLF?line?terminators"?>/dev/null?;?then ????????which?dos2unix?>/dev/null?2>&1?||?yum?-q?-y?install?dos2unix?||?apt-get?-qq?-y?install?dos2unix ????????dos2unix?${file}?>/dev/null ????fi } function?del_comment_in_c_cpp_file(){ ????tmp_file=/tmp/.noComment_$(date?+%Y%m%d%H%M%S%N$RANDOM) ????cp?${file}?${tmp_file} ????#delete?the?comment?line?begin?with?'//comment' ????sed?-i?"/^[?\t]*\/\//d"?${tmp_file} ????#delete?the?comment?line?end?with?'//comment' ????sed?-i?"s/\/\/[^\"]*//"?${tmp_file} ????#delete?the?comment?only?occupied?one?line?'/*?comment?*/' ????sed?-i?"s/\/\*.*\*\///"?${tmp_file} ????#delete?the?comment?that?occupied?many?lines?'/*comment ????#??????????????????????????????????????????????*comment ????#??????????????????????????????????????????????*/ ????sed?-i?"/^[?\t]*\/\*/,/.*\*\//d"?${tmp_file} ????grep?-v?^$?${tmp_file} ????\rm?-f?${tmp_file} } function?del_comment_in_sh_conf_file(){ ????#ignore?the?comment?line?end?with?'#?comment' ????grep?-v?"^[?\t]*\#"?${file}?|?grep?-v?"^$" } function?del_comment_in_xml_file(){ ????if?test?-f?${file}?&&?file?${file}?|?grep?"XML"?>/dev/null;?then ????????which?tidy?>/dev/null?2>&1?||?yum?-q?-y?install?tidy?>/dev/null?2>&1?||?apt-get?-qq?-y?install?tidy?>/dev/null?2>&1 ????????tidy?-quiet?-asxml?-xml?-indent?-wrap?1024?--hide-comments?1?${file} ????else ????????which?tidy?>/dev/null?2>&1?||?yum?-q?-y?install?tidy?>/dev/null?2>&1?||?apt-get?-qq?-y?install?tidy?>/dev/null?2>&1 ????????tidy?-quiet?-asxml?-xml?-indent?-wrap?1024?--hide-comments?1?${file} ????fi } function?del_comment_in_general_file(){ ????#ignore?the?comment?line?end?with?'#?comment' ????grep?-v?"^[?\t]*\#"?${file}?|?grep?-v?"^[?\t]*\;"?|grep?-v?"^$" } function?del_comment(){ ????case?${file}?in ????????*.c|*.cpp|*.h) ????????????del_comment_in_c_cpp_file ????????????;; ????????*.sh|*.conf) ????????????del_comment_in_sh_conf_file ????????????;; ????????*.xml) ????????????del_comment_in_xml_file ????????????;; ????????*) ????????????del_comment_in_general_file ????????????;; ????esac } file=$1 if?[[?-f?${file}?]];?then ????del_comment else ????echo?"ls:?cannot?access?$file:?No?such?file?or?directory"?&&?exit?1 fi if?${DEBUG}?;?then ????export?PS4=${old_PS4} ????${_XTRACE_FUNCTIONS} fi

tag:刪除注釋,不查看注釋,去掉注釋

--end--

本文轉(zhuǎn)自 urey_pp 51CTO博客，原文鏈接：http://blog.51cto.com/dgd2010/1886595，如需轉(zhuǎn)載請(qǐng)自行聯(lián)系原作者

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