├── .gitattributes
├── hello.c
├── .gitconfig
├── .git_filters
    ├── rcs-keywords.clean
    └── rcs-keywords.smudge
└── README


/.gitattributes:
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1 | # .gitattributes
2 | # Map file extensions to git filters
3 | 
4 | *.h filter=rcs-keywords
5 | *.c filter=rcs-keywords
6 | *.cc filter=rcs-keywords
7 | *.m filter=rcs-keywords
8 | *.mm filter=rcs-keywords
9 | 


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/hello.c:
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 1 | /**
 2 |  * @file        hello.c
 3 |  * @author      @$Author$
 4 |  * @date	@$Date$
 5 |  * @version	@$Revision$
 6 |  *
 7 |  * $Id$
 8 |  */
 9 | 
10 | #include "stdio.h"
11 | 
12 | int main(int argc, char *argv[])
13 |   printf("Hello, world!");
14 | }
15 | 


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/.gitconfig:
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 1 | 
 2 | [alias]
 3 | 	co = checkout
 4 | 	ci = commit -a
 5 | 
 6 | # To add keyword expansion:
 7 | # git init
 8 | # cp ~/.gitconfig, <project>/.gitattributes, and <project>/.git_filters
 9 | [filter "rcs-keywords"]
10 | 	clean  = .git_filters/rcs-keywords.clean
11 | 	smudge = .git_filters/rcs-keywords.smudge %f
12 | 


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/.git_filters/rcs-keywords.clean:
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 1 | #!/usr/bin/perl -p
 2 | #
 3 | # @brief  Git filter to implement rcs keyword expansion as seen in cvs and svn.
 4 | # @author Martin Turon
 5 | #
 6 | # Copyright (c) 2009-2011 Turon Technologies, Inc.  All rights reserved.
 7 | 
 8 | s/\$Id[^\$]*\$/\$Id\$/; 
 9 | s/\$Date[^\$]*\$/\$Date\$/;
10 | s/\$Author[^\$]*\$/\$Author\$/; 
11 | s/\$Source[^\$]*\$/\$Source\$/; 
12 | s/\$File[^\$]*\$/\$File\$/; 
13 | s/\$Revision[^\$]*\$/\$Revision\$/;
14 | 


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/README:
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 1 | 
 2 | This module provides a means to add keyword expansion of the following 
 3 | standard RCS tags to your git projects:
 4 | 
 5 | 	 $Id$
 6 | 	 $Date$
 7 | 	 $File$
 8 | 	 $Author$
 9 | 	 $Revision$
10 | 	 $Source$
11 | 
12 | The mechanism used are filters.  The smudge filter is run on checkout, and the
13 | clean filter is run on commit.  The tags are only expanded on the local disk,
14 | not in the repository itself.
15 | 
16 | To start, you need to add the following to ~/.gitconfig:
17 | 
18 | [filter "rcs-keywords"]
19 | 	clean  = .git_filters/rcs-keywords.clean
20 | 	smudge = .git_filters/rcs-keywords.smudge %f
21 | 
22 | Then, to add keyword expansion, simply add these files to your project:
23 |     <project>/.gitattributes                    - *.c filter=rcs-keywords
24 |     <project>/.git_filters/rcs-keywords.smudge  - copy this file to project
25 |     <project>/.git_filters/rcs-keywords.clean   - copy companion to project
26 | 
27 | Note: This feature is known not to work in git 1.6.2.2 and 1.7.3.*, and 
28 |       verified to work in git 1.7.4.4 and 1.7.4.msysgit.0
29 | 


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/.git_filters/rcs-keywords.smudge:
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 1 | #!/usr/bin/perl
 2 | #
 3 | # @brief  Git filter to implement rcs keyword expansion as seen in cvs and svn.
 4 | # @author Martin Turon
 5 | #
 6 | # Usage:
 7 | #    .git_filter/rcs-keywords.smudge file_path < file_contents
 8 | # 
 9 | # To add keyword expansion:
10 | #    <project>/.gitattributes                    - *.c filter=rcs-keywords
11 | #    <project>/.git_filters/rcs-keywords.smudge  - copy this file to project
12 | #    <project>/.git_filters/rcs-keywords.clean   - copy companion to project
13 | #    ~/.gitconfig                                - add [filter] lines below
14 | #
15 | # [filter "rcs-keywords"]
16 | #	clean  = .git_filters/rcs-keywords.clean
17 | #	smudge = .git_filters/rcs-keywords.smudge %f
18 | #
19 | # Copyright (c) 2009-2011 Turon Technologies, Inc.  All rights reserved.
20 | 
21 | $path = shift;
22 | $path =~ /.*\/(.*)/;
23 | $filename = $1;
24 | 
25 | if (0 == length($filename)) {
26 | 	$filename = $path;
27 | }
28 | 
29 | # Need to grab filename and to use git log for this to be accurate.
30 | $rev = `git log -- $path | head -n 3`;
31 | $rev =~ /^Author:\s*(.*)\s*$/m;
32 | $author = $1;
33 | $author =~ /\s*(.*)\s*<.*/;
34 | $name = $1;
35 | $rev =~ /^Date:\s*(.*)\s*$/m;
36 | $date = $1;
37 | $rev =~ /^commit (.*)$/m;
38 | $ident = $1;
39 | 
40 | while (<STDIN>) {
41 |     s/\$Date[^\$]*\$/\$Date:   $date \$/;
42 |     s/\$Author[^\$]*\$/\$Author: $author \$/;
43 |     s/\$Id[^\$]*\$/\$Id: $filename | $date | $name \$/;
44 |     s/\$File[^\$]*\$/\$File:   $filename \$/;
45 |     s/\$Source[^\$]*\$/\$Source: $path \$/;
46 | 	s/\$Revision[^\$]*\$/\$Revision: $ident \$/;
47 | } continue {
48 |     print or die "-p destination: $!\n";
49 | }
50 | 


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