业务变得复杂了，相关的代码目录也需要修改名字。 以前都是直接在centos开发机进行开发，所以没有遇到sed的问题。
文章写的不是很严谨，欢迎来喷，另外该文后续有更新的，请到原文地址查看更新。http://xiaorui.cc/2016/01/14/%E8%AE%BAmac%E4%BD%BF%E7%94%A8sed%E4%BF%AE%E6%94%B9%E6%96%87%E4%BB%B6%E7%9A%84%E6%AD%A3%E7%A1%AE%E5%A7%BF%E5%8A%BF/
sed问题如下.
#blog: xiaorui.cc [ruifengyun@ct ec_master (master ✗)]$ sed -i "s/addr/ec_addr/g" lib/log.py sed: 1: "lib/log.py": extra characters at the end of l command
解决方法:
man sed
-i extension
Edit files in-place, saving backups with the specified extension. If a zero-length extension is given, no backup will be saved. It is not recommended to give a zero-length extension when in-place
editing files, as you risk corruption or partial content in situations where disk space is exhausted, etc.
在mac sed help给出的一些例子中发现 sed -i 需要带一个字符串，用来备份源文件，这个字符串会加在源文件名后面组成备份的文件名。
如果这个字符串长度为0，就是说是个空串，那么不备份。
#blog: xiaorui.cc sed -i "_nima" 's/xiaorui/python/g' example.txt
这样sed不仅会修改文件，并且会生成一个example.txt_nima的备份文件。
如果不想备份修改前的内容，可以直接给个空参数, sed -i “” xxx.grovvy
#blog: xiaorui.cc sed -i "" 's/xiaorui/python/g' example.txt
另外说下，在mac下使用sed批量修改文件内容时遇到的问题.
上面说的是单个文件内容修改，如果想要批量递归文件修改的化，需要在前面加上find 或grep过滤文件.
[ruifengyun@devops ec_master (master ✗)]find ec_handler -name "*.py"|xargs sed -i "s/ec_handler/feed_handler/g"
sed: 1: "ec_handler/__init__.py": invalid command code e
[ruifengyun@devops ec_master (master ✗)] grep -rl "ec_handler" |xargs sed -i "s/ec_handler/feed_handler/g"
grep: warning: recursive search of stdin
正确利用sed批量修改文件的姿势是…
find ec_handler -name "*.py"|xargs sed -i '' 's/ec_handler/feed_handler/g'
总之，一定要在mac sed加上备份参数，或后缀字符串，或空.
如果你就是想用linux的sed， 可以这么安装gsed. 不建议你把gsed直接别名为sed, 有些外部进程会调用sed进行数据修改的,比如sublime.
sudo brew install gnu-sed
[ruifengyun@devops ec_master (master ✗)]$ gsed
Usage: /usr/local/homebrew/Cellar/gnu-sed/4.2.2/bin/gsed [OPTION]… {script-only-if-no-other-script} [input-file]…
-n, –quiet, –silent
suppress automatic printing of pattern space
-e script, –expression=script
add the script to the commands to be executed
-f script-file, –file=script-file
add the contents of script-file to the commands to be executed
–follow-symlinks
follow symlinks when processing in place
-i[SUFFIX], –in-place[=SUFFIX]
edit files in place (makes backup if SUFFIX supplied)
-l N, –line-length=N
specify the desired line-wrap length for the `l’ command
–posix
disable all GNU extensions.
-r, –regexp-extended
use extended regular expressions in the script.
-s, –separate
consider files as separate rather than as a single continuous
long stream.
-u, –unbuffered
load minimal amounts of data from the input files and flush
the output buffers more often
-z, –null-data
separate lines by NUL characters
–help display this help and exit
–version output version information and exit
If no -e, –expression, -f, or –file option is given, then the first
non-option argument is taken as the sed script to interpret. All
remaining arguments are names of input files; if no input files are
specified, then the standard input is read.
GNU sed home page: <http://www.gnu.org/software/sed/>.
General help using GNU software: <http://www.gnu.org/gethelp/>.
mac osx是个基于freebsd内核开发的系统，可能就因为这个，很多在linux特别流畅的shell命令，都不能流畅，痛快的使用起来.
