mirror of
https://github.com/moparisthebest/wget
synced 2024-07-03 16:38:41 -04:00
161 lines
6.7 KiB
Plaintext
161 lines
6.7 KiB
Plaintext
* Guidelines for patch submissions.
|
|
===================================
|
|
|
|
** What is a patch?
|
|
-------------------
|
|
|
|
A patch file, also known as a "diff", is a textual representation of
|
|
changes to source code. Patches are readable enough to be reviewed by
|
|
humans and at the same time regular enough to be processed by
|
|
programs. The `patch' utility is used to change the source code in
|
|
the manner that the patch describes, this being called "applying" the
|
|
patch. Patches work even on files that have been modified
|
|
independently of the modifications in the patch, as long as those
|
|
other changes do not conflict with the patch.
|
|
|
|
Because of these properties, patches are the preferred means of
|
|
distributing the changes to a free software project. If you have made
|
|
a change to Wget and would like to contribute it, you will need to
|
|
create a patch and send it to the developers; please read on.
|
|
|
|
** Where to send the patches.
|
|
-----------------------------
|
|
|
|
Patches intended to be applied to Wget should be mailed to
|
|
<wget-patches@sunsite.dk>. Each patch will be reviewed by the
|
|
developers, and will be acked and added to the distribution, or
|
|
rejected with an explanation. Unfortunately, the developers are often
|
|
busy with their day jobs, so the review process can take a while.
|
|
|
|
If you want to discuss your patch with the community of Wget users and
|
|
developers, it is OK to send it to the main list at <wget@sunsite.dk>.
|
|
If the patch is really huge (more than 100K or so), you may want to
|
|
put it on the web and post the URL.
|
|
|
|
EVERY patch should be accompanied by an explanation of what the patch
|
|
changes, and why the change is desirable or necessary. The
|
|
explanation need not be long, but please don't just send a patch
|
|
without any accompanying text.
|
|
|
|
Normally, a patch can be just inserted into the message, after the
|
|
explanation and the ChangeLog entry. However, if your mail composer
|
|
or gateway is inclined to munge patches, e.g. by wrapping long lines,
|
|
please send them out as a MIME attachment. It is important that the
|
|
patch survives the travel unchanged so that we can feed it to the
|
|
`patch' utility after reviewing it.
|
|
|
|
** How to create patches.
|
|
-------------------------
|
|
|
|
First, please make sure that you are working with the latest version
|
|
of the source -- changing obsolete code is a waste of time. Working
|
|
on the latest release is acceptable in most cases, but it is better
|
|
yet to download the very latest sources from the public Subversionn
|
|
server and work on those. The web page at
|
|
<http://www.gnu.org/software/wget/> explains how to get the source
|
|
code from the repository.
|
|
|
|
Patches are created using the `diff' program. When making patches,
|
|
please use the `-u' option, or if your diff doesn't support it, `-c'.
|
|
Ordinary (context-free) diffs are notoriously prone to errors, since
|
|
line numbers tend to change when others make changes to the same
|
|
source file.
|
|
|
|
In the general case, `diff' is used like this:
|
|
|
|
diff -u ORIGFILE CHANGEDFILE > patch.txt
|
|
|
|
Also, it is helpful if you create the patch in the top level of
|
|
the Wget source directory. For example:
|
|
|
|
cp src/http.c src/http.c.orig
|
|
... modify src/http.c ....
|
|
diff -u src/http.c.orig src/http.c > patch.txt
|
|
|
|
If your patch changes more than one file, feel free to simply
|
|
concatenate the diffs of different files into a large diff:
|
|
|
|
(diff -u foo.orig foo; diff -u bar.orig bar) > patch.txt
|
|
|
|
The alternative is to leave the unchanged source lying around and use
|
|
the `-r' option to compare entire directories:
|
|
|
|
diff -ru wget-1.9.orig wget-1.9 > patch.txt
|
|
|
|
If you do that, please be careful not to include the differences to
|
|
automatically generated files, such as `.info*'.
|
|
|
|
If you are using Subversion, generating diffs is even simpler -- after
|
|
changing the files, all you need to do is run the following command
|
|
from Wget's top-level directory:
|
|
|
|
svn diff > patch.txt
|
|
|
|
If you run on Windows and don't have `diff' handy, please obtain it.
|
|
It's extremely hard to review changes to files unless they're in the
|
|
form of a patch. If you really cannot use a variant of `diff', then
|
|
mail us the whole new file and indicate which version of Wget you
|
|
changed; that way we will be able to generate the diff ourselves.
|
|
|
|
Finally, if your changes introduce new files, or if they change the
|
|
old files past all recognition (e.g. by completely reimplementing the
|
|
old stuff), sending a patch might not make sense. In that case, just
|
|
attach the files along with an explanation of what is being changed.
|
|
|
|
** Standards and coding style.
|
|
------------------------------
|
|
|
|
Wget abides by the GNU coding standards, available at:
|
|
|
|
http://www.gnu.org/prep/standards.html
|
|
|
|
I consider perhaps the most important single point in that entire
|
|
document to be the "no arbitrary limits" rule. Even where Wget's
|
|
coding is less than exemplary, it respects that rule. There should be
|
|
no exceptions.
|
|
|
|
Here is a short recap of the GNU formatting and naming conventions,
|
|
partly borrowed from XEmacs:
|
|
|
|
* Put a space after every comma.
|
|
|
|
* Put a space before the parenthesis that begins a function call,
|
|
macro call, function declaration or definition, or control
|
|
statement (if, while, switch, for). (DO NOT do this for macro
|
|
definitions; this is invalid preprocessor syntax.)
|
|
|
|
* The brace that begins a control statement (if, while, for, switch,
|
|
do) or a function definition should go on a line by itself.
|
|
|
|
* In function definitions, put the return type and all other
|
|
qualifiers on a line before the function name. Thus, the function
|
|
name is always at the beginning of a line.
|
|
|
|
* Indentation level is two spaces. (However, the first and
|
|
following statements of a while/for/if/etc. block are indented
|
|
four spaces from the while/for/if keyword. The opening and
|
|
closing braces are indented two spaces.)
|
|
|
|
* Variable and function names should be all lowercase, with
|
|
underscores separating words, except for a prefixing tag, which may
|
|
be in uppercase. Do not use the mixed-case convention (e.g.
|
|
SetVariableToValue ()) and *especially* do not use Microsoft
|
|
Hungarian notation (char **rgszRedundantTag).
|
|
|
|
* Preprocessor constants and enumerations should be all uppercase,
|
|
and should be prefixed with a tag that groups related constants
|
|
together.
|
|
|
|
** ChangeLog policy.
|
|
--------------------
|
|
|
|
Each patch should be accompanied by an update to the appropriate
|
|
ChangeLog file. Please don't mail diffs of ChangeLog files because
|
|
they have an extremely high rate of failure; just mail us the new
|
|
entries you added to the ChangeLog. Patches without a ChangeLog entry
|
|
will be accepted, but this creates additional work for the
|
|
maintainers, so please do take the time to write one.
|
|
|
|
Guidelines for writing ChangeLog entries are also governed by the GNU
|
|
coding standards, under the "Change Logs" section.
|