为Mac OS X转换Linux shell脚本

Question

我们如何转换下面的shell脚本，以便在Mac OS X上实现相同的结果？

# To generate secure SSH deploy key for a github repo to be used from Travis 
# https://gist.github.com/floydpink/4631240 
base64 --wrap=0 ~/.ssh/id_rsa_deploy > ~/.ssh/id_rsa_deploy_base64 
ENCRYPTION_FILTER="echo \$(echo \"- secure: \")\$(travis encrypt \"\$FILE='\`cat $FILE\`'\" -r floydpink/harimenon.com)" 
split --bytes=100 --numeric-suffixes --suffix-length=2 --filter="$ENCRYPTION_FILTER" ~/.ssh/id_rsa_deploy_base64 id_rsa_ 

# To reconstitute the private SSH key once running inside Travis (typically from 'before_script') 
echo -n $id_rsa_{00..30} >> ~/.ssh/id_rsa_base64 
base64 --decode --ignore-garbage ~/.ssh/id_rsa_base64 > ~/.ssh/id_rsa 
chmod 600 ~/.ssh/id_rsa 
echo -e "Host github.com\n\tStrictHostKeyChecking no\n" >> ~/.ssh/config 

我能想出相当于base64命令是：

base64 --break=0 id_rsa_deploy > id_rsa_deploy_base64 

但它看起来像split command on Mac OS X是在Linux/Unix的有点不同，不具有--filter选项。

编辑：这是我a gist从this blog entry，详细说明如何将自动部署使用Travis CI的Octopress博客到GitHub上跌跌撞撞就到了。

我已经在Ubuntu Linux和had blogged about it上成功完成了这个任务，但是无法在Mac上重复。

Answer 1

您可能希望从brew安装核心utils的（丢失的包管理器为OS X），然后使用gsplit：

$ brew install coreutils 
$ gsplit --help 
Usage: gsplit [OPTION]... [INPUT [PREFIX]] 
Output fixed-size pieces of INPUT to PREFIXaa, PREFIXab, ...; default 
size is 1000 lines, and default PREFIX is 'x'. With no INPUT, or when INPUT 
is -, read standard input. 

Mandatory arguments to long options are mandatory for short options too. 
    -a, --suffix-length=N generate suffixes of length N (default 2) 
     --additional-suffix=SUFFIX append an additional SUFFIX to file names. 
    -b, --bytes=SIZE  put SIZE bytes per output file 
    -C, --line-bytes=SIZE put at most SIZE bytes of lines per output file 
    -d, --numeric-suffixes[=FROM] use numeric suffixes instead of alphabetic. 
            FROM changes the start value (default 0). 
    -e, --elide-empty-files do not generate empty output files with '-n' 
     --filter=COMMAND write to shell COMMAND; file name is $FILE 
    -l, --lines=NUMBER  put NUMBER lines per output file 
    -n, --number=CHUNKS  generate CHUNKS output files. See below 
    -u, --unbuffered  immediately copy input to output with '-n r/...' 
     --verbose   print a diagnostic just before each 
          output file is opened 
     --help  display this help and exit 
     --version output version information and exit