about summary refs log tree commit homepage
path: root/lib/PublicInbox/Config.pm
blob: 8d66cf8c35fcb9aba02aaed2286e5e4da580234c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
# Copyright (C) 2014-2015 all contributors <meta@public-inbox.org>
# License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
#
# Used throughout the project for reading configuration
package PublicInbox::Config;
use strict;
use warnings;
require PublicInbox::Inbox;
use PublicInbox::Spawn qw(popen_rd);

# returns key-value pairs of config directives in a hash
# if keys may be multi-value, the value is an array ref containing all values
sub new {
	my ($class, $file) = @_;
	$file = default_file() unless defined($file);
	$file = ref $file ? $file : git_config_dump($file);
	my $self = bless $file, $class;

	# caches
	$self->{-by_addr} ||= {};
	$self->{-by_name} ||= {};
	$self->{-by_newsgroup} ||= {};
	$self->{-limiters} ||= {};
	$self;
}

sub lookup {
	my ($self, $recipient) = @_;
	my $addr = lc($recipient);
	my $inbox = $self->{-by_addr}->{$addr};
	return $inbox if $inbox;

	my $pfx;

	foreach my $k (keys %$self) {
		$k =~ /\A(publicinbox\.[\w-]+)\.address\z/ or next;
		my $v = $self->{$k};
		if (ref($v) eq "ARRAY") {
			foreach my $alias (@$v) {
				(lc($alias) eq $addr) or next;
				$pfx = $1;
				last;
			}
		} else {
			(lc($v) eq $addr) or next;
			$pfx = $1;
			last;
		}
	}
	defined $pfx or return;
	_fill($self, $pfx);
}

sub lookup_name ($$) {
	my ($self, $name) = @_;
	$self->{-by_name}->{$name} || _fill($self, "publicinbox.$name");
}

sub each_inbox {
	my ($self, $cb) = @_;
	my %seen;
	foreach my $k (keys %$self) {
		$k =~ /\Apublicinbox\.([A-Z0-9a-z-]+)\.mainrepo\z/ or next;
		next if $seen{$1};
		$seen{$1} = 1;
		my $ibx = lookup_name($self, $1) or next;
		$cb->($ibx);
	}
}

sub lookup_newsgroup {
	my ($self, $ng) = @_;
	$ng = lc($ng);
	my $rv = $self->{-by_newsgroup}->{$ng};
	return $rv if $rv;

	foreach my $k (keys %$self) {
		$k =~ /\A(publicinbox\.[\w-]+)\.newsgroup\z/ or next;
		my $v = $self->{$k};
		my $pfx = $1;
		if ($v eq $ng) {
			$rv = _fill($self, $pfx);
			return $rv;
		}
	}
	undef;
}

sub limiter {
	my ($self, $name) = @_;
	$self->{-limiters}->{$name} ||= do {
		require PublicInbox::Qspawn;
		my $max;
		# XXX "limiter.<name>.max" was a historical mistake
		foreach my $pfx (qw(publicinboxlimiter limiter)) {
			$max ||= $self->{"$pfx.$name.max"};
		}
		PublicInbox::Qspawn::Limiter->new($max);
	};
}

sub get {
	my ($self, $inbox, $key) = @_;

	$self->{"publicinbox.$inbox.$key"};
}

sub config_dir { $ENV{PI_DIR} || "$ENV{HOME}/.public-inbox" }

sub default_file {
	my $f = $ENV{PI_CONFIG};
	return $f if defined $f;
	config_dir() . '/config';
}

sub git_config_dump {
	my ($file) = @_;
	my ($in, $out);
	my @cmd = (qw/git config/, "--file=$file", '-l');
	my $cmd = join(' ', @cmd);
	my $fh = popen_rd(\@cmd) or die "popen_rd failed for $file: $!\n";
	my %rv;
	local $/ = "\n";
	foreach my $line (<$fh>) {
		chomp $line;
		my ($k, $v) = split(/=/, $line, 2);
		my $cur = $rv{$k};

		if (defined $cur) {
			if (ref($cur) eq "ARRAY") {
				push @$cur, $v;
			} else {
				$rv{$k} = [ $cur, $v ];
			}
		} else {
			$rv{$k} = $v;
		}
	}
	close $fh or die "failed to close ($cmd) pipe: $?";
	\%rv;
}

sub _fill {
	my ($self, $pfx) = @_;
	my $rv = {};

	foreach my $k (qw(mainrepo address filter url newsgroup
			infourl watch watchheader httpbackendmax)) {
		my $v = $self->{"$pfx.$k"};
		$rv->{$k} = $v if defined $v;
	}

	# TODO: more arrays, we should support multi-value for
	# more things to encourage decentralization
	foreach my $k (qw(altid nntpmirror)) {
		if (defined(my $v = $self->{"$pfx.$k"})) {
			$rv->{$k} = ref($v) eq 'ARRAY' ? $v : [ $v ];
		}
	}

	return unless $rv->{mainrepo};
	my $name = $pfx;
	$name =~ s/\Apublicinbox\.//;
	$rv->{name} = $name;
	$rv->{-pi_config} = $self;
	$rv = PublicInbox::Inbox->new($rv);
	my $v = $rv->{address};
	if (ref($v) eq 'ARRAY') {
		$self->{-by_addr}->{lc($_)} = $rv foreach @$v;
	} else {
		$self->{-by_addr}->{lc($v)} = $rv;
	}
	if (my $ng = $rv->{newsgroup}) {
		$self->{-by_newsgroup}->{$ng} = $rv;
	}
	$self->{-by_name}->{$name} = $rv;
}

1;