sed

[uniquejava]

目录：

http://www.thegeekstuff.com/tag/sed-tips-and-tricks

打印。。

http://www.thegeekstuff.com/2009/09/unix-sed-tutorial-printing-file-lines-using-address-and-patterns/

# sed -n 'ADDRESS'p filename
# sed -n '/PATTERN/p' filename

删除

http://www.thegeekstuff.com/2009/09/unix-sed-tutorial-delete-file-lines-using-address-and-patterns/

# sed 'ADDRESS'd filename
# sed /PATTERN/d filename

查找替换

http://www.thegeekstuff.com/2009/09/unix-sed-tutorial-replace-text-inside-a-file-using-substitute-command/

#sed 'ADDRESSs/REGEXP/REPLACEMENT/FLAGS' filename
#sed 'PATTERNs/REGEXP/REPLACEMENT/FLAGS' filename

学到了如何将windows下的换行批量转unix sed 's/.$//' filename 这个.号也可以显示地写成\r，因为每行在处理之前会先自动去掉\n所以每行的最后一个字符是\r

写文件

http://www.thegeekstuff.com/2009/10/unix-sed-tutorial-how-to-write-to-a-file-using-sed/

#sed 'ADDERSSw outputfile' inputfilename
#sed '/PATTERN/w outputfile' inputfilename

学到了同时执行多段脚本：

sed -n -e '1w output.txt' -e '$w output.txt' thegeekstuff.txt

如何执行多个sed command

http://www.thegeekstuff.com/2009/10/unix-sed-tutorial-how-to-execute-multiple-sed-commands/

#sed -e 'command' -e 'command' filename

如果只有一个command则-e可写可不写。（难怪） 删除第一行， 最后一行和空白行

sed -e '1d' -e '$d' -e '/^$/d' thegeekstuff.txt

高级替换

6-1如果REGEX或REPLACEMENT中有/，则需要用\转义，或者使用@ % | ; : 做为sed的分隔符

sed 's@/opt/omni/lbin@/opt/tools/bin@g' path.txt

以上用@做为分隔符替换某个路径值

6-2 &用在REPLACEMENT指代REGEX实际匹配的那部分内容

sed 's@/usr/bin@&/local@g' path.txt

这里的&指代/usr/bin， 又比如

sed 's@^.*$@<<<&>>>@g' path.txt

把每行用<<<>>>括起来。。这个用法比较实用

6-3分组和back refercence A group is opened with “(” and closed with “)”, 并且back reference即可用在REGEX部分也可以用在replacement部分

sed 's/\(\/[^:]*\).*/\1/g' path.txt

每行只保留第一个冒号前面的路径 ==> /usr/kbos/bin:/usr/local/bin:/usr/jbin/ 变成 /usr/kbos/bin

又比如：

$ sed '$s@\([^:]*\):\([^:]*\):\([^:]*\)@\3:\2:\1@g' path.txt

颠倒最后一行３个路径的出现顺序，

又比如

sed 's/\([^:]*\).*/\1/' /etc/passwd

从/etc/passwd中取所有的用户名（第一列就是)

又比如

$ echo "Welcome To The Geek Stuff" | sed 's/\(\b[A-Z]\)/\(\1\)/g'
(W)elcome (T)o (T)he (G)eek (S)tuff

将每个单词首字母用括号括起来，我试了一下，这个例子中replacement部分括号是不需要转义的 这样也行==> echo "Welcome To The Geek Stuff" | sed 's/\(\b[A-Z]\)/(\1)/g'

　插入行，替换行，打印行号

http://www.thegeekstuff.com/2009/11/unix-sed-tutorial-append-insert-replace-and-count-file-lines/#count_lines

#sed 'ADDRESS a\
    Line which you want to append' filename

#sed '/PATTERN/ a\
    Line which you want to append' filename
在上面的syntax中, a表示在某行之后插入, 之前用i, 替换用c

比如我有一个文件hello.sh内容如下： echo "hello cyper"

使用后插a，前插i，和替换c之后的效果如下：

$ sed '1 a#!/bin/sh' hello.sh
echo "hello cyper"
#!/bin/sh
$ sed '1 i#!/bin/sh' hello.sh
#!/bin/sh
echo "hello cyper"
$ sed '1 c#!/bin/sh' hello.sh
#!/bin/sh
$ 

当然我的本意是前插，　所以在这种情况下选择i

同时操作多行 (待读)

http://www.thegeekstuff.com/2009/11/unix-sed-tutorial-multi-line-file-operation-with-6-practical-examples/

1. http://www.thegeekstuff.com/2009/12/unix-sed-tutorial-7-examples-for-sed-hold-and-pattern-buffer-operations/

2. http://www.thegeekstuff.com/2009/12/unix-sed-tutorial-6-examples-for-sed-branching-operation/

[uniquejava]

mac

mac中的所有sed -i 'command' filename要改成sed -i '' 'command' filename 也就是说-i后面多了个空字符串，这是因为mac中的sed不是gnu sed 使用brew install gnu-sed可以安装，然后使用gsed。。

[uniquejava]

示例一：

#!/bin/bash

# create temporary folder
mkdir -p temp/modules

# ng-annotate modules/*.js, the output is temp/modules/*.js
files=""
for file in $( find modules -type f -name "*.js" )
do
  echo ng-annotate -a $file -o temp/"$file"
  files=$files" temp/"$file
  ng-annotate -a $file -o temp/"$file"
  # Do something else.
done

# uglify temp/modules/*js, the output is app.js
echo uglifyjs -cmo app.js $files
uglifyjs -cmo app.js $files

# remove temporary folder
rm -rf temp/modules

start=$( grep -n 'MODULES_START' ./index.html|cut -d: -f1 )
end=$( grep -n 'MODULES_END' ./index.html|cut -d: -f1 )
diff=$[$end-$start]
echo $diff
if [ "$diff" -gt 1 ]; then
    sed -i '' $[$start+1],$[$end-1]''d index.html
fi

sed -i '' '/MODULES_START/ a\
    <script src="app.js"></script>\
    ' index.html

echo complete.

exit 0

示例二

#!/bin/bash
files=""
for file in $( find modules -type f -name "*.js" )
do
  files=$files'<script src="'$file'"></script>'
done

echo $files

start=$( grep -n 'MODULES_START' ./index.html|cut -d: -f1 )
end=$( grep -n 'MODULES_END' ./index.html|cut -d: -f1 )
diff=$[$end-$start]
echo $diff
if [ "$diff" -gt 1 ]; then
    sed -i '' $[$start+1],$[$end-1]''d index.html
fi

targetstring="<!-- MODULES_END -->"
sed -i '' "s#${targetstring}#${files}#g" index.html

sed -i '' '/<\/body>/ i\
    <!-- MODULES_END -->\

    ' index.html

echo complete.

exit 0

示例三：

#!/bin/sh

#set web project path
XX_HOME=$HOME/ws/xx

#set firefox add-on sdk path
SDK_HOME=$HOME/DevTools/addon-sdk-1.17

#activate cfx command
cd $SDK_HOME
. ./bin/activate

#change to add-on directory
cd -

#define version number

CUR_VERSION=$(sed -n '/"version":/p' package.json|awk 'BEGIN{FS="\""}{print $4}')
echo "########Set release number#################"
echo -n "Please input new version(default: $CUR_VERSION):"
read NEW_VERSION
if [ -e $NEW_VERSION ]; then
    NEW_VERSION=$CUR_VERSION
fi
echo "New version is: $NEW_VERSION"

#change package.json version
sed -i "s/$CUR_VERSION/$NEW_VERSION/" package.json

#change xx.properties version
sed -i '/XXAddOn\.requiredVersion/ cXXAddOn.requiredVersion='$NEW_VERSION $XX_HOME/data/xx.properties

#change monitorURL
sed -i '/var monitorURL/ cvar monitorURL = "/path/to/xx/";' lib/main.js

#build and release the plugin
cfx xpi && cp *.xpi $XX_HOME/WebContent/js/addon && echo "Build complete."