Merging a couple related threads here:
On Aug 16, 2007, at 07:57:23, Rene Herman wrote:
On 08/16/2007 01:26 PM, Salikh Zakirov wrote:
Rene Herman wrote:
Perhaps that immediately suggests an implementation to someone
already familiar with git internals?
perhaps http://www.kernel.org/pub/software/scm/git/docs/
gitattributes.html and http://www.kernel.org/pub/software/scm/git/
docs/git-check-attr.html can help you?
No, thanks, saw them, but .gitattributes is in fact in the same
category as .gitignore, which would _be_ a property.
If you do this stuff in files scattered around the tree, updating
and moving stuff becomes a pain -- the tool would need to go edit
files.
From a practical standpoint we don't want to duplicate someone's
maintainer information in the attributes of every file they
maintain. It would be much easier to put in the "kernel/somesubsys"
directory a Maintainers file which has:
[SOME RANDOM SUBSYSTEM]
P: J. Random Hacker
M: j.random.hacker@localhost
L: random-subsys-devel@xxxxxxxxxxxxxxx
F: *
Anywhere else you had files that you wanted to associate with J.
Random Hacker's maintainership, you would just use:
[SOME RANDOM SUBSYSTEM]
F: somesubsys.h
I posted a comment describing a mechanism like this a couple days ago:
http://lkml.org/lkml/2007/8/14/488
Executive overview:
On Aug 15, 2007, at 07:21:04, Rafael J. Wysocki wrote:
On Wednesday, 15 August 2007 04:51, Kyle Moffett wrote:
(a) "Maintainers" files sprinkled around the source tree with
relative pathnames and other data
(b) Tool to generate a combined "MAINTAINERS" file from the ones
sprinkled around the source tree
(c) Tool to search through the generated "MAINTAINERS" file with
all sorts of useful command-line options
(d) Tool to check the generated "MAINTAINERS" file against recent
git history and make suggestions
I like this idea. :-)
Well, to back up this idea with some code, I'm attaching a little
perl script which does part (b). Basically you call it as:
./maint-combine $(find . -name Maintainers)
It will print any syntax errors on stderr during parsing. Once it's
done it will dump to stdout its combined "MAINTAINERS" text. A
couple notes:
* It uses a little "priority" system to figure out what order to
print the data from each origin in. For example, the "F:" tag is
given a score of 0, to force data consisting of just files towards
the end. The "P:", "M:", and "L:" tags are given scores of 5, since
people are generally interesting to know about. Everything else is
given a score of "1". The scores are added up per ($file,
$subsystem) pair and then during printing each subsystem's data is
ordered by score (highest comes first).
* It generally allows any field at all; eventually we might want to
limit it to a fixed list to help avoid typos.
* It has a little bit of magic logic for the "F:" field so that it
figures out the relative directory for each field when generating the
output. For example, an entry of "asm-*/suspend.h" in a file
"include/Maintainers" will produce the output file entry: "F: include/
asm-*/suspend.h"
* The format isn't quite the same as the current MAINTAINERS file,
to make parsing easier and more dummy-proof I changed the syntax for
a subsystem-name to use square brackets (IE: "[SUSPEND TO RAM]").
The samples I gave in my previous email are what I used to test it
with, plus a little dummy file with some syntax errors to check out
the error messages:
Maintainers:
[EVERYTHING ELSE]
P: Various Linux Kernel Developers
L: linux-kernel@xxxxxxxxxxxxxxx
F: *
kernel/power/Maintainers:
[SUSPEND TO RAM]
P: Pavel Machek
M: pavel@xxxxxxx
P: Rafael J. Wysocki
M: rjw@xxxxxxx
L: linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx
S: Maintained
F: *
include/Maintainers:
[SUSPEND TO RAM]
F: linux/suspend.h
F: linux/freezer.h
F: linux/pm.h
F: asm-*/suspend.h
If you have any other questions, the perl script is pretty self-
explanatory and I'll be completely back online this weekend. With
any luck I'll have some time in a hotel tomorrow (mmm, slow-as-dirt
hotel wireless, what fun) to work on parts (c) and (d).
Cheers,
Kyle Moffett
#! /usr/bin/perl
use strict;
use warnings;
## This table is for determining what order to show entries from different
## source "Maintainers" files. They are prioritized based on the number and
## significance of each field, as listed in this table. Any field not found
## here will be assumed to have a significance of "1".
my %fieldprio = (
p => 5, ## Person
m => 5, ## Email
l => 5, ## Mailing List
f => 0, ## File
);
my %mprio;
my %maint;
my $section;
my $origin;
my $pathprefix;
my $printorigin;
while (<>) {
unless (defined $origin and $origin eq $ARGV) {
undef $section;
## Get rid of extra slashes, unnecessary "./" entries
$ARGV =~ s{//+}{/}g;
$ARGV =~ s{(^|/)\./}{$1};
$origin = $ARGV;
}
chomp; s/\s+/ /g; s/^ //; s/ $//;
/\S+/ or next;
if (/^\[ ?([^]]+) ?\]$/) {
$section = uc $1;
$printorigin = 1 if $origin ne '-';
$maint{$section}{$origin} ||= [];
$mprio{$section}{$origin} ||= 0;
## Figure out a useful path prefix if there is one
$pathprefix = ($origin =~ m{(^.*/)(?!\.\.?$)[^/]+$})?$1:"";
next;
}
unless (/^([^:]+?) ?: ?(.*)$/) {
print STDERR "$ARGV:$.: Invalid line: $_\n";
next;
}
my($field,$value) = (lc($1), $2);
unless (defined $section) {
print STDERR "$ARGV:$.: Found field '\u$field' before ",
"any subsystem declaration: $_\n";
next;
}
## Preprocess paths to make them absolute
$value = $pathprefix.$value if $field eq 'f';
## Update the sorting order
if (exists $fieldprio{$field}) {
$mprio{$section}{$origin} += $fieldprio{$field};
} else {
$mprio{$section}{$origin}++;
}
push @{$maint{$section}{$origin}}, [$field, $value];
}
sub priosort ( $@ )
{
my $section = shift;
return sort {$mprio{$section}{$b} <=> $mprio{$section}{$a}} @_;
}
for $section (sort {$a cmp $b} keys %maint) {
print "[$section]\n";
for my $origin (priosort $section, keys %{$maint{$section}}) {
print "\nOrigin: $origin\n" if $printorigin;
print "\u$_->[0]: $_->[1]\n" for @{$maint{$section}{$origin}};
}
print "\n\n";
}
# vim:set ft=perl:
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