user/dev discussion of public-inbox itself
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# Copyright (C) 2019 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>

# common stuff for administrative command-line tools
# Unstable internal API
package PublicInbox::Admin;
use strict;
use warnings;
use Cwd 'abs_path';
use base qw(Exporter);
our @EXPORT_OK = qw(resolve_repo_dir);

sub resolve_repo_dir {
	my ($cd, $ver) = @_;
	my $prefix = defined $cd ? $cd : './';
	if (-d $prefix && -f "$prefix/inbox.lock") { # v2
		$$ver = 2 if $ver;
		return abs_path($prefix);
	}

	my @cmd = qw(git rev-parse --git-dir);
	my $cmd = join(' ', @cmd);
	my $pid = open my $fh, '-|';
	defined $pid or die "forking $cmd failed: $!\n";
	if ($pid == 0) {
		if (defined $cd) {
			chdir $cd or die "chdir $cd failed: $!\n";
		}
		exec @cmd;
		die "Failed to exec $cmd: $!\n";
	} else {
		my $dir = eval {
			local $/;
			<$fh>;
		};
		close $fh or die "error in $cmd: $!\n";
		chomp $dir;
		$$ver = 1 if $ver;
		return abs_path($cd) if ($dir eq '.' && defined $cd);
		abs_path($dir);
	}
}

# for unconfigured inboxes
sub detect_indexlevel ($) {
	my ($ibx) = @_;

	# brand new or never before indexed inboxes default to full
	return 'full' unless $ibx->over;
	delete $ibx->{over}; # don't leave open FD lying around

	my $l = 'basic';
	my $srch = $ibx->search or return $l;
	delete $ibx->{search}; # don't leave open FD lying around
	if (my $xdb = $srch->xdb) {
		$l = 'full';
		my $m = $xdb->get_metadata('indexlevel');
		if ($m eq 'medium') {
			$l = $m;
		} elsif ($m ne '') {
			warn <<"";
$ibx->{mainrepo} has unexpected indexlevel in Xapian: $m

		}
	}
	$l;
}

sub resolve_inboxes {
	my ($argv) = @_;
	require PublicInbox::Config;
	require PublicInbox::Inbox;

	my @ibxs = map { resolve_repo_dir($_) } @$argv;
	push(@ibxs, resolve_repo_dir()) unless @ibxs;

	my %dir2ibx;
	if (my $config = eval { PublicInbox::Config->new }) {
		$config->each_inbox(sub {
			my ($ibx) = @_;
			$dir2ibx{abs_path($ibx->{mainrepo})} = $ibx;
		});
	}
	for my $i (0..$#ibxs) {
		my $dir = $ibxs[$i];
		$ibxs[$i] = $dir2ibx{$dir} ||= do {
			my $name = "unconfigured-$i";
			PublicInbox::Inbox->new({
				name => $name,
				address => [ "$name\@example.com" ],
				mainrepo => $dir,
				# TODO: consumers may want to warn on this:
				#-unconfigured => 1,
			});
		};
	}
	@ibxs;
}

# TODO: make Devel::Peek optional, only used for daemon
my @base_mod = qw(Email::MIME Date::Parse Devel::Peek);
my @over_mod = qw(DBD::SQLite DBI);
my %mod_groups = (
	-index => [ @base_mod, @over_mod ],
	-base => \@base_mod,
	-search => [ @base_mod, @over_mod, 'Search::Xapian' ],
);

sub scan_ibx_modules ($$) {
	my ($mods, $ibx) = @_;
	if (!$ibx->{indexlevel} || $ibx->{indexlevel} ne 'basic') {
		$mods->{'Search::Xapian'} = 1;
	} else {
		$mods->{$_} = 1 foreach @over_mod;
	}
}

sub check_require {
	my (@mods) = @_;
	my $err = {};
	while (my $mod = shift @mods) {
		if (my $groups = $mod_groups{$mod}) {
			push @mods, @$groups;
		} else {
			eval "require $mod";
			$err->{$mod} = $@ if $@;
		}
	}
	scalar keys %$err ? $err : undef;
}

sub missing_mod_msg {
	my ($err) = @_;
	my @mods = map { "`$_'" } sort keys %$err;
	my $last = pop @mods;
	@mods ? (join(', ', @mods)."' and $last") : $last
}

sub require_or_die {
	my $err = check_require(@_) or return;
	die missing_mod_msg($err)." required for $0\n";
}

sub indexlevel_ok_or_die ($) {
	my ($indexlevel) = @_;
	my $req;
	if ($indexlevel eq 'basic') {
		$req = '-index';
	} elsif ($indexlevel =~ /\A(?:medium|full)\z/) {
		$req = '-search';
	} else {
		die <<"";
invalid indexlevel=$indexlevel (must be `basic', `medium', or `full')

	}
	my $err = check_require($req) or return;
	die missing_mod_msg($err) ." required for indexlevel=$indexlevel\n";
}

sub index_inbox {
	my ($ibx, $opt) = @_;
	my $jobs = delete $opt->{jobs} if $opt;
	if (ref($ibx) && ($ibx->{version} || 1) == 2) {
		eval { require PublicInbox::V2Writable };
		die "v2 requirements not met: $@\n" if $@;
		my $v2w = eval { $ibx->importer(0) } || eval {
			PublicInbox::V2Writable->new($ibx, {nproc=>$jobs});
		};
		if (defined $jobs) {
			if ($jobs == 0) {
				$v2w->{parallel} = 0;
			} else {
				my $n = $v2w->{partitions};
				if ($jobs != ($n + 1)) {
					warn
"Unable to respect --jobs=$jobs, inbox was created with $n partitions\n";
				}
			}
		}
		my $warn_cb = $SIG{__WARN__} || sub { print STDERR @_ };
		local $SIG{__WARN__} = sub {
			$warn_cb->($v2w->{current_info}, ': ', @_);
		};
		$v2w->index_sync($opt);
	} else {
		require PublicInbox::SearchIdx;
		my $s = PublicInbox::SearchIdx->new($ibx, 1);
		$s->index_sync($opt);
	}
}

sub progress_prepare ($) {
	my ($opt) = @_;

	# public-inbox-index defaults to quiet, -xcpdb and -compact do not
	if (defined($opt->{quiet}) && $opt->{quiet} < 0) {
		$opt->{quiet} = !$opt->{verbose};
	}
	if ($opt->{quiet}) {
		open my $null, '>', '/dev/null' or
			die "failed to open /dev/null: $!\n";
		$opt->{1} = fileno($null); # suitable for spawn() redirect
		$opt->{-dev_null} = $null;
	} else {
		$opt->{verbose} ||= 1;
		$opt->{-progress} = sub { print STDERR @_ };
	}
}

1;
debug log:

solving 419cb35 ...
found 419cb35 in https://80x24.org/public-inbox.git

user/dev discussion of public-inbox itself

This inbox may be cloned and mirrored by anyone:

	git clone --mirror http://public-inbox.org/meta
	git clone --mirror http://czquwvybam4bgbro.onion/meta
	git clone --mirror http://hjrcffqmbrq6wope.onion/meta
	git clone --mirror http://ou63pmih66umazou.onion/meta

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V1 meta meta/ http://public-inbox.org/meta \
		meta@public-inbox.org
	public-inbox-index meta

Example config snippet for mirrors.
Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.mail.public-inbox.meta
	nntp://ou63pmih66umazou.onion/inbox.comp.mail.public-inbox.meta
	nntp://czquwvybam4bgbro.onion/inbox.comp.mail.public-inbox.meta
	nntp://hjrcffqmbrq6wope.onion/inbox.comp.mail.public-inbox.meta
	nntp://news.gmane.io/gmane.mail.public-inbox.general
 note: .onion URLs require Tor: https://www.torproject.org/

code repositories for the project(s) associated with this inbox:

	https://80x24.org/public-inbox.git

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git