Recursive multi-line replace: changing copyright headers

Question

I'm retrying to replace all of the copyright headers in my project (100+ files) with a new version. Currently I have something like this at the start of each file:

<?php
/**
 * Project name
 *
 * @copyright Apache 2.0
 * @author    FooBar
 */

And I want all my files to start like this:

<?php
/**
 * Copyright 2014 FooBar
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

I've already looked at:

• this thread, which I can't get working. It does a partial replacement, keeping certain lines of the original text in the new text. I want a complete replacement.

• this script, which similarly doesn't work for my use case. It replaces the very start of each file with a new header, which causes the existing content (<?php /** */) to be appended to the new comment, thereby causing parse errors.

Does anybody know how I can do a recursive multi-line file replace? Do I need to use sed/awk?

SOLUTION:

I just need to execute this bash script:

INPUT=../path

find $INPUT -name "*.php" -exec sed -i -e '2,/\*\//d; 1r copyright.txt' {} \;

Answer 1

Is it safe to assume all your files start with

<?php
/**

If so, you can use

sed '2,/\*\//d; 1r newSig.txt' input.txt

The first sed command deletes the signature from line 2 til the end of the signature. You could use a dynamic range but it would also delete other multi-line signatures in the file. The second command reads the file newSig.txt, which has your new signature, and appends it after line 1.

Answer 2

With GNU awk for a multi-char RS to read the whole file as a single string:

$ gawk -v RS='^$' -v hdr="\
/**
 * Copyright 2014 FooBar
 *
 * Licensed under the blah blah blah
 */\
" '{sub(/\/\*[^/]+\*\//,hdr)}1' file
<?php
/**
 * Copyright 2014 FooBar
 *
 * Licensed under the blah blah blah
 */