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Full Discussion: print only comments
Top Forums Shell Programming and Scripting print only comments Post 302429131 by Mark_orig on Saturday 12th of June 2010 06:39:29 PM
Old 06-12-2010
print only comments
I want to write a shell script which it takes as argument a java file or a c++ file (.java or .cpp).
It will check if the file is type of java or c++, else it ends with error message.
If all are ok, it will call awk that prints only the comments that the java or c++ file contains, grouping and puting them between tags.

For example, I have this code:
Code:
/*
The HelloWorld class implements an application that
simply prints "Hello World!" to standard output.
//You can add comments
*/
class HelloWorld {
    public static void main(String[] args) {
//Let's print Hello World
        System.out.println("Hello World!");
    } /* some comments */
} //end of class

I want to have this output:
Code:
<comments>
/*
The HelloWorld class implements an application that
simply prints "Hello World!" to standard output.
//You can add comments
*/
/* some comments */
//end of class
</comments>

 

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LEARN ABOUT MOJAVE

git-check-attr

GIT-CHECK-ATTR(1)                                                   Git Manual                                                   GIT-CHECK-ATTR(1)

NAME

       git-check-attr - Display gitattributes information

SYNOPSIS

       git check-attr [-a | --all | attr...] [--] pathname...
       git check-attr --stdin [-z] [-a | --all | attr...]

DESCRIPTION

       For every pathname, this command will list if each attribute is unspecified, set, or unset as a gitattribute on that pathname.

OPTIONS

       -a, --all
           List all attributes that are associated with the specified paths. If this option is used, then unspecified attributes will not be
           included in the output.

       --cached
           Consider .gitattributes in the index only, ignoring the working tree.

       --stdin
           Read pathnames from the standard input, one per line, instead of from the command-line.

       -z
           The output format is modified to be machine-parseable. If --stdin is also given, input paths are separated with a NUL character instead
           of a linefeed character.

       --
           Interpret all preceding arguments as attributes and all following arguments as path names.

       If none of --stdin, --all, or -- is used, the first argument will be treated as an attribute and the rest of the arguments as pathnames.

OUTPUT

       The output is of the form: <path> COLON SP <attribute> COLON SP <info> LF

       unless -z is in effect, in which case NUL is used as delimiter: <path> NUL <attribute> NUL <info> NUL

       <path> is the path of a file being queried, <attribute> is an attribute being queried and <info> can be either:

       unspecified
           when the attribute is not defined for the path.

       unset
           when the attribute is defined as false.

       set
           when the attribute is defined as true.

       <value>
           when a value has been assigned to the attribute.

       Buffering happens as documented under the GIT_FLUSH option in git(1). The caller is responsible for avoiding deadlocks caused by
       overfilling an input buffer or reading from an empty output buffer.

EXAMPLES

       In the examples, the following .gitattributes file is used:

           *.java diff=java -crlf myAttr
           NoMyAttr.java !myAttr
           README caveat=unspecified

       o   Listing a single attribute:

           $ git check-attr diff org/example/MyClass.java
           org/example/MyClass.java: diff: java

       o   Listing multiple attributes for a file:

           $ git check-attr crlf diff myAttr -- org/example/MyClass.java
           org/example/MyClass.java: crlf: unset
           org/example/MyClass.java: diff: java
           org/example/MyClass.java: myAttr: set

       o   Listing all attributes for a file:

           $ git check-attr --all -- org/example/MyClass.java
           org/example/MyClass.java: diff: java
           org/example/MyClass.java: myAttr: set

       o   Listing an attribute for multiple files:

           $ git check-attr myAttr -- org/example/MyClass.java org/example/NoMyAttr.java
           org/example/MyClass.java: myAttr: set
           org/example/NoMyAttr.java: myAttr: unspecified

       o   Not all values are equally unambiguous:

           $ git check-attr caveat README
           README: caveat: unspecified

SEE ALSO

       gitattributes(5).

GIT

       Part of the git(1) suite

Git 2.17.1                                                          10/05/2018                                                   GIT-CHECK-ATTR(1)
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