打印行+;如果下一行匹配,则下两行使用awk
我有一张这样的清单来捕捉joomla的版本打印行+;如果下一行匹配,则下两行使用awk,awk,Awk,我有一张这样的清单来捕捉joomla的版本 ./somedir/bla/old/libraries/cms/version/version.php public $RELEASE = '2.5'; public $DEV_LEVEL = '24'; ./somedir/bla3/www/libraries/cms/version/version.php public $RELEASE = '2.5'; public $DEV_LEV
./somedir/bla/old/libraries/cms/version/version.php
public $RELEASE = '2.5';
public $DEV_LEVEL = '24';
./somedir/bla3/www/libraries/cms/version/version.php
public $RELEASE = '2.5';
public $DEV_LEVEL = '9';
./somedir/bla4/www/libraries/cms/version/version.php
./somedir/bla5/www/w/scripts/version.php
./somedir/bla6/www/libraries/cms/version/version.php
./somedir/bla7/www/libraries/cms/version/version.php
public $RELEASE = '2.5';
public $DEV_LEVEL = '9';
我想要的是,如果public
位于下一行,则只显示该行+下两行。Else行必须忽略
因此,结果应该是:
./somedir/bla/old/libraries/cms/version/version.php
public $RELEASE = '2.5';
public $DEV_LEVEL = '24';
./somedir/bla3/www/libraries/cms/version/version.php
public $RELEASE = '2.5';
public $DEV_LEVEL = '9';
./somedir/bla7/www/libraries/cms/version/version.php
public $RELEASE = '2.5';
public $DEV_LEVEL = '9';
我尝试过使用Awk和这个Awk脚本
BEGIN{ RS=""; FS="\n" }
/public/ {
for (i=1; i<=NF; i++) {
if ( ! (($i ~ /./) && ($(i+1) !~ /public/) && ($(i+2) !~ /public/) ) ) {
print $i
}
}
print ""
}
我错过了开发级别的第二条公开线路您正在通过打印下一步的内容(因为您还没有看到它,所以很难做到!)而不是打印之前的内容(很容易做到-只需保存并打印即可),使这一点变得更加困难:
任何时候,当你发现自己试图根据当前行之后的内容来决定如何处理当前行时,请花时间重新思考,在处理未来行时,根据之前的内容来做一些事情(因此它就是“当前”行)。在软件和生活中,看到未来比回忆过去要困难得多 尝试使用
grep
-B NUM, --before-context=NUM
Print NUM lines of leading context before matching lines.
Places a line containing a group separator (--) between contiguous groups of matches.
grep'public$DEV'-b2yourfile.txt
从man grep
-B NUM, --before-context=NUM
Print NUM lines of leading context before matching lines.
Places a line containing a group separator (--) between contiguous groups of matches.
这两次。(三次是因为你知道什么)三次是字符填充。非常有用的评论。这使我在我的模式之前展示了主导上下文。谢谢
-B NUM, --before-context=NUM
Print NUM lines of leading context before matching lines.
Places a line containing a group separator (--) between contiguous groups of matches.