管道findstr的输出 [英] piping findstr's output
问题描述
Windows命令行，我要搜索一个文件，以所有行开头：
Windows command line, I want to search a file for all rows starting with:
# NNN "<file>.inc"
其中 NNN 和< file> 任何字符串。
我想使用findstr，因为我不能要求用户
I want to use findstr, because I cannot require that the users of the script install ack.
这是我想出的表达式：
>findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9_]*.inc" all_pre.txt
要搜索的文件是 all_pre.txt 。
到目前为止好了，现在我想将它转换为另一个命令，例如更多。
So far so good. Now I want to pipe that to another command, say for example more.
>findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9]*.inc" all_pre.txt | more
这样做的结果与上一个命令的输出相同，但文件名为prefix
The result of this is the same output as the previous command, but with the file name as prefix for every row (all_pre.txt).
然后来：
FINDSTR: cannot open |
FINDSTR: cannot open more
为什么管道不工作？
剪辑all_pre.txt的内容
snip of the content of all_pre.txt
# 1 "main.ss"
# 7 "main.ss"
# 11 "main.ss"
# 52 "main.ss"
# 1 "Build_flags.inc"
# 7 "Build_flags.inc"
# 11 "Build_flags.inc"
# 20 "Build_flags.inc"
# 45 "Build_flags.inc(function a called from b)"
以逃避正则表达式中的点。不是问题，但值得一提。
I need to escape the dot in the regex also. Not the issue, but worth to mention.
>findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9_]*\.inc" all_pre.txt
编辑：Frank Bollack：
EDIT after Frank Bollack:
>findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9_]*\.inc.*" all_pre.txt | more
不工作，虽然（我认为）它应该寻找相同的字符串，字符任意多次。必须包括，对吗？
is not working, although (I think) it should look for the same string as before then any character any number of times. That must include the ", right?
推荐答案
findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9]*.inc\"" all_pre.txt | more
以上为我工作。
编辑：
findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9]*\.inc.*\"" all_pre.txt | more
此更新的搜索字符串现在将匹配您示例中的这些行：
This updated search string will now match these lines from your example:
# 1 "Build_flags.inc"
# 7 "Build_flags.inc"
# 11 "Build_flags.inc"
# 20 "Build_flags.inc"
# 45 "Build_flags.inc(function a called from b)"
$ b b
编辑：
为了避免 findstr 您可以将您的搜索放入如下的批处理文件中：
To circumvent this "bug" in findstr, you can put your search into a batch file like this:
@findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9_]*\.inc" %1
b $ b
命名为 myfindstr.bat ，并像这样调用：
myfinsdtr all_pre.txt | more
现在可以使用管道和重定向运算符
You can now use the pipe and redirection operators as usual.
希望有帮助。
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