跨文件系统的grep在shell脚本中没有输出

Question

我试图在Git中创建一个预先提交的钩子，它将检查任何调试代码并提示用户修复它。我有我的grepping一个正则表达式（忽略一个事实，即它不会在多行注释排除出现！）：

grep -IiRn --exclude-dir={node_modules,vendor,public,lib,contrib} --include=\*.{module,inc,install,php,js} -P '^\s*(?!\/\/)\s*(dpm\(|dsm\(|console.log\()' /path/to/code/ 

当我在控制台正常运行呢？这工作得很好，但是当我尝试它在一个可执行的.sh脚本中它什么都不做。以下的都没有为我工作：

#!/bin/sh 

grep ... 

MYVAR =`grep ...` # Note the backticks! 
echo $MYVAR 

MYVAR =$(grep ...) 
echo $MYVAR 

MYVAR ="`grep ...`" 
echo $MYVAR 

我试着用Python和os.system()这样做，但，要么什么也没做。它似乎只是没有STDOUT。可能有些东西显而易见，但我处于一个松散的状态。

任何帮助将不胜感激！谢谢。

编辑：

这是确切的剧本，即使它在尽可能早的阶段因不能够真正做到第一位到。因为它可能是最好的SO不同意我公司的代码库，我已经隐藏了确切的文件夹名称;）

#!/bin/bash 

echo "Test!" 

ONE=`grep -IiRn --exclude-dir={node_modules,vendor,public,lib,contrib} --include=\*.{module,inc,install,php,js} -P '^\s*(?!\/\/)\s*(dpm\(|dsm\(|console.log\()' /company/projects/company/www/sites/all/modules/custom/` 

TWO=$(grep -IiRn --exclude-dir={node_modules,vendor,public,lib,contrib} --include=\*.{coffee} -P '^\s*(?!\#)\s*(dpm\(|dsm\(|console.log)' /company/projects/company/www/sites/all/modules/custom/) 

echo $ONE 
echo "$TWO" 

...和运行bash -x pre-commit回报：

ubuntu@ip-12-34-56-78:/company/projects/company/scripts$ bash -x pre-commit 
+ echo 'Test!' 
Test! 
++ grep -IiRn --exclude-dir=node_modules --exclude-dir=vendor --exclude-dir=public --exclude-dir=lib --exclude-dir=contrib '--include=*.module' '--include=*.inc' '--include=*.install' '--include=*.php' '--include=*.js' -P '^\s*(?!\/\/)\s*(dpm\(|dsm\(|console.log\()' /company/projects/company/www/sites/all/modules/custom/ 
+ ONE='/company/projects/company/www/sites/all/modules/custom/some_module/some_module.report.inc:594: dsm('\''test'\''); 
/company/projects/company/www/sites/all/modules/custom/goals_app/goals_app.module:170: console.log(e.stack); 
/company/projects/company/www/sites/all/modules/custom/company_usage_reports/js/script.js:300:   console.log('\''fetch success'\''); 
/company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_change_workgroup.js:19: console.log('\''wtf?'\''); 
/company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_reorder_table.js:33:     console.log(resp); 
/company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_reorder_table.js:39:    console.log(ui.placeholder); 
/company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_goal_form.js:4:  console.log($(".required")); 
/company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_reorder.js:40:     console.log(resp); 
/company/projects/company/www/sites/all/modules/custom/company_goals/js/views/goal-list.js:87:   console.log(data);' 
++ grep -IiRn --exclude-dir=node_modules --exclude-dir=vendor --exclude-dir=public --exclude-dir=lib --exclude-dir=contrib '--include=*.{coffee}' -P '^\s*(?!\#)\s*(dpm\(|dsm\(|console.log)' /company/projects/company/www/sites/all/modules/custom/ 
+ TWO= 
+ echo /company/projects/company/www/sites/all/modules/custom/some_module/some_module.report.inc:594: 'dsm('\''test'\'');' /company/projects/company/www/sites/all/modules/custom/goals_app/goals_app.module:170: 'console.log(e.stack);' /company/projects/company/www/sites/all/modules/custom/company_usage_reports/js/script.js:300: 'console.log('\''fetch' 'success'\'');' /company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_change_workgroup.js:19: 'console.log('\''wtf?'\'');' /company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_reorder_table.js:33: 'console.log(resp);' /company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_reorder_table.js:39: 'console.log(ui.placeholder);' /company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_goal_form.js:4: 'console.log($(' '".required"' '));' /company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_reorder.js:40: 'console.log(resp);' /company/projects/company/www/sites/all/modules/custom/company_goals/js/views/goal-list.js:87: 'console.log(data);' 
/company/projects/company/www/sites/all/modules/custom/some_module/some_module.report.inc:594: dsm('test'); /company/projects/company/www/sites/all/modules/custom/goals_app/goals_app.module:170: console.log(e.stack); /company/projects/company/www/sites/all/modules/custom/company_usage_reports/js/script.js:300: console.log('fetch success'); /company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_change_workgroup.js:19: console.log('wtf?'); /company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_reorder_table.js:33: console.log(resp); /company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_reorder_table.js:39: console.log(ui.placeholder); /company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_goal_form.js:4: console.log($(".required")); /company/projects/company/www/sites/all/modules/custom/another_module/js/another_module_reorder.js:40: console.log(resp); /company/projects/company/www/sites/all/modules/custom/company_goals/js/views/goal-list.js:87: console.log(data); 
+ echo '' 

...但运行它没有-x标志STILL不起作用。

编辑二：

如果你想知道，我的ENV如下...

ubuntu@ip-12-34-56-78:~$ uname -a 
Linux ip-12-34-56-78 3.2.0-31-virtual #50-Ubuntu SMP Fri Sep 7 16:36:36 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux 
ubuntu@ip-12-34-56-78:~$ whereis sh && whereis bash 
sh: /bin/sh /bin/sh.distrib /usr/share/man/man1/sh.1.gz 
bash: /bin/bash /etc/bash.bashrc /usr/share/man/man1/bash.1.gz 

Answer 1

，直到你发布你正在运行的实际脚本我不能肯定地说，但在当前的代码段有

#!/bin/sh 

根据您的操作系统，这可能是一个/bin/bash链接，例如，也可以是实际的Bourne shell，这does not support brace expansion（如{a, b, c}）。即使/bin/sh在您的机器上指向/bin/bash，如果您的shebang是#!/bin/sh（即表示您的意思），您应该只使用便携式结构。如果您想在脚本中使用大括号扩展，请将shebang更改为#!/bin/bash。

如果你把

set -x 

在脚本的顶部，它会打印详细的信息，可以与调试帮助。您也可以通过调用外壳，而不是直接修改你的脚本做到这一点，例如

sh -x /path/to/script 

或

bash -x /path/to/script 

---

编辑：在Ubuntu上，/bin/sh是破折号，Debian的Almquist贝壳。像Bourne shell一样，短划线也相当有限，并且不支持大括号扩展。有关可移植性问题和破折号的讨论，请参阅this page。