当在python bindings / clang中的get-includes中解析cpp文件时，过滤目录 [英] Filtering directories when parsing cpp files in get-includes in python bindings/clang

问题描述

我应该写一个python-clang解析器，返回cpp文件中的所有包含。
所以我使用sth像下面的代码：

I should write a python-clang parser which returns all the inclusions in cpp files. So I use sth like the following code:

def _main():
    from clang.cindex import Index
    from optparse import OptionParser

    filter=['/usr/lib','usr/include']
    p=OptionParser()
    (o,a)=p.parse_args()
    i=Index.create()
    t=i.parse(None,a)
    for i in t.get_includes():
        print i.include

if __name__=='__main__':
    _main()

现在我需要过滤一些包含像特定目录：

Now i need to filter just some of inclusions like specific directories:

filter=['/usr/lib','usr/include']

问题1：我想知道这种过滤是如何实现的我的代码应该改变？

Question 1: I would like to know how this filtering is possible and how my code should change?

问题2：如何使一个配置文件包括所有这些过滤器，而不是只写它们硬编码？

Question 2: How to make a config file to include all these filter direstories in that instead of just writting them hardcoded?

运行测试：您需要一个cpp文件，如：

to run the test: you need to have a cpp file like:

  #include<iostream>
  #include"ex1.h"

  int main(){
      return 0;
  }

和* .h文件：

 #include<QMap>

运行：

./python-clang.py ex1.cpp

结果样本： p>

sample of results:

 /usr/include/pthread.h
 /usr/include/sched.h
 /usr/include/time.h
 /usr/include/bits/sched.h
 /usr/include/time.h
 /usr/include/bits/time.h
 /usr/include/signal.h
 /usr/include/bits/sigset.h
 /usr/include/bits/pthreadtypes.h
 /usr/include/bits/wordsize.h
 /usr/include/bits/setjmp.h
 /usr/include/bits/wordsize.h
 /usr/include/bits/wordsize.h
 /usr/include/unistd.h
 /usr/include/bits/posix_opt.h
 /usr/include/bits/environments.h
 /usr/include/bits/wordsize.h
 /usr/include/bits/confname.h
 /usr/include/getopt.h
 /usr/lib/gcc/i486-linux-gnu/4.4/../../../../include/c++/4.4/i486-linux-gnu/bits      /atomic_word.h
/usr/lib/gcc/i486-linux-gnu/4.4/../../../../include/c++/4.4/bits/locale_classes.h
/usr/lib/gcc/i486-linux-gnu/4.4/../../../../include/c++/4.4/string
/usr/lib/gcc/i486-linux-gnu/4.4/../../../../include/c++/4.4/bits/allocator.h
/usr/lib/gcc/i486-linux-gnu/4.4/../../../../include/c++/4.4/i486-linux-gnu/bits/c++allocator.h
/usr/lib/gcc/i486-linux-gnu/4.4/../../../../include/c++/4.4/ext/new_allocator.h

推荐答案

您可以在中执行循环：

...
for i in t.get_includes():
    if not i.include in filter:
        print i.include
...

对于包含排除项的配置文件。你可以这样做：

As for the config file containing the exclusions. You could do something like this:

def _main():
    ...
    with open('/path/to/file/ignore.txt') as f:
        filter = f.readlines()
    ...

然后在 ignore.txt ：

/usr/lib
/usr/include
...

$ b b

UPDATE

根据您对您的问题的意见和编辑。

UPDATE

Based on your comments and edits to your question.

def _main():
    ...
    with open('/path/to/file/ignore.txt') as f:
        ignore = map(lambda l: l.strip(), f.readlines())

    for i in t.get_includes():
        if not i.include.startswith(ignore):
            print i.include

这里要注意几件事。

1. 我已将过滤器更改为忽略 $ c> filter
   是一个内置类型。


2. ignore.txt中的行将 \\\
剥离并映射到
   a tuple ，而不是 list ，以便在读取时可以与
   startswith 方法一起使用。


3. 您还可以使用列表推导将过滤的结果
   添加到以后使用的列表中。

1. I've changed the variable name filter to ignore since filter is a built-in type.
2. The lines in ignore.txt are having the \n stripped and mapped to a tuple instead of a list so they can be used with the startswith method when being read.
3. You could also use list comprehension to put the filtered results into a list to be used later.

results = [i.include for i in t.get_includes（）if not i.startswith（ignore）]

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