2nd try: please, review the script for JDK license headers verification

[Misha Bykov]

Please, review the webrev is located at:

http://cr.openjdk.java.net/~mbykov/lic_check/webrev.00/

INTRO

It's recommended for a developer, when he introduced or modified source 
code files, to check whether a license header is precisely correct for 
every modified file.

The new script allows a JDK developer to check if the specified license 
header for a given file (or a set of files) matches the right header 
template.

NAME

lic_check.sh - JDK source code legal headers conformance verification

SYNOPSIS

lic_check.sh [-gpl] or [-gplcp] or [-bsd] file(s)

DESCRIPTION

The script for OpenJDK distribution to verify legal notices in a 
particular source file or a set of files.

The script must be located in the directory:

$ROOT/make/scripts

It uses templates from:

$ROOT/make/templates

The successful output example:

###
### Checking copyright notice in the file: filename.java
###
No differences encountered
SUCCESS: The license header for filename.java has been verified.

The unsuccessful output example if Oracle copyright string is missing or 
copyright years are not correct :

###
### Checking copyright notice in the file: filename.java
###
ERROR: Copyright string is not correct or missing in filename.java.

If the copyright string is correct, but the license header is not 
correct, the script should produce the
"diff" output between a template in $ROOT/make/templates and the license 
header from the given file.

HOW TO TEST

1. Place the script into $ROOT/make/scripts in JDK8 source repository 
(otherwise it will not find $ROOT/make/templates and produce an error).
2. cd to the directory with the files to check license headers
3. $ROOT/make/scripts/lic_check.sh [-gpl] or [-gplcp] or [-bsd] filename(s)

SUCCESS EXAMPLE

% ./lic_check.sh -gpl update_copyright_year.sh
### Checking copyright notice in the file: update_copyright_year.sh
###
No differences encountered
SUCCESS: The license header for 
jdk8/make/scripts/update_copyright_year.sh has been verified.
###

FAILURE EXAMPLE

% ./lic_check.sh -gpl hgforest.sh
### Checking copyright notice in the file: hgforest.sh
###
*** /tmp/source_file.9122       Mon Jun  4 17:44:11 2012
--- jdk8/make/scripts/./../templates/gpl-header Wed Apr 11 08:53:09 2012
***************
*** 1,7 ****
  Copyright (c) %YEARS% Oracle and/or its affiliates. All rights reserved.
  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

! This code is free software; you can redistribute it and/or modify itX
  under the terms of the GNU General Public License version 2 only, as
  published by the Free Software Foundation.

--- 1,7 ----
  Copyright (c) %YEARS% Oracle and/or its affiliates. All rights reserved.
  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

! This code is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License version 2 only, as
  published by the Free Software Foundation.

ERROR: License header is not correct in 
/java/jle_build/headers/jdk8/make/scripts/hgforest.sh
See diffs above.
###


NEXT STEPS

In the future, this script will be used by special scripts to allow 
headers verification in the whole OpenJDK source code base.