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-rw-r--r--lib/PublicInbox/Config.pm52
-rw-r--r--lib/PublicInbox/LEI.pm95
-rw-r--r--lib/PublicInbox/LeiConfig.pm23
-rw-r--r--lib/PublicInbox/LeiMirror.pm5
-rw-r--r--t/lei.t17
5 files changed, 123 insertions, 69 deletions
diff --git a/lib/PublicInbox/Config.pm b/lib/PublicInbox/Config.pm
index f6236d84..533f4a52 100644
--- a/lib/PublicInbox/Config.pm
+++ b/lib/PublicInbox/Config.pm
@@ -22,7 +22,7 @@ sub _array ($) { ref($_[0]) eq 'ARRAY' ? $_[0] : [ $_[0] ] }
 # returns key-value pairs of config directives in a hash
 # if keys may be multi-value, the value is an array ref containing all values
 sub new {
-        my ($class, $file, $errfh) = @_;
+        my ($class, $file, $lei) = @_;
         $file //= default_file();
         my $self;
         my $set_dedupe;
@@ -36,7 +36,7 @@ sub new {
                         $self = $DEDUPE->{$file} and return $self;
                         $set_dedupe = 1;
                 }
-                $self = git_config_dump($class, $file, $errfh);
+                $self = git_config_dump($class, $file, $lei);
                 $self->{'-f'} = $file;
         }
         # caches
@@ -174,13 +174,34 @@ sub config_fh_parse ($$$) {
         \%rv;
 }
 
+sub tmp_cmd_opt ($$) {
+        my ($env, $opt) = @_;
+        # quiet global and system gitconfig if supported by installed git,
+        # but normally harmless if too noisy (NOGLOBAL no longer exists)
+        $env->{GIT_CONFIG_NOSYSTEM} = 1;
+        $env->{GIT_CONFIG_GLOBAL} = '/dev/null'; # git v2.32+
+        $opt->{-C} = '/'; # avoid $worktree/.git/config on MOST systems :P
+}
+
 sub git_config_dump {
-        my ($class, $file, $errfh) = @_;
-        return bless {}, $class unless -e $file;
-        my $cmd = [ qw(git config -z -l --includes), "--file=$file" ];
-        my $fh = popen_rd($cmd, undef, { 2 => $errfh // 2 });
+        my ($class, $file, $lei) = @_;
+        my @opt_c = map { ('-c', $_) } @{$lei->{opt}->{c} // []};
+        $file = undef if !-e $file;
+        # XXX should we set {-f} if !-e $file?
+        return bless {}, $class if (!@opt_c && !defined($file));
+        my %env;
+        my $opt = { 2 => $lei->{2} // 2 };
+        if (@opt_c) {
+                unshift(@opt_c, '-c', "include.path=$file") if defined($file);
+                tmp_cmd_opt(\%env, $opt);
+        }
+        my @cmd = ('git', @opt_c, qw(config -z -l --includes));
+        push(@cmd, '-f', $file) if !@opt_c && defined($file);
+        my $fh = popen_rd(\@cmd, \%env, $opt);
         my $rv = config_fh_parse($fh, "\0", "\n");
-        close $fh or die "@$cmd failed: \$?=$?\n";
+        close $fh or die "@cmd failed: \$?=$?\n";
+        $rv->{-opt_c} = \@opt_c if @opt_c; # for ->urlmatch
+        $rv->{-f} = $file;
         bless $rv, $class;
 }
 
@@ -544,14 +565,23 @@ sub _fill_ei ($$) {
         $es;
 }
 
+sub config_cmd {
+        my ($self, $env, $opt) = @_;
+        my $f = $self->{-f} // default_file();
+        my @opt_c = @{$self->{-opt_c} // []};
+        my @cmd = ('git', @opt_c, 'config');
+        @opt_c ? tmp_cmd_opt($env, $opt) : push(@cmd, '-f', $f);
+        \@cmd;
+}
+
 sub urlmatch {
         my ($self, $key, $url, $try_git) = @_;
         state $urlmatch_broken; # requires git 1.8.5
         return if $urlmatch_broken;
-        my $file = $self->{'-f'} // default_file();
-        my $cmd = [qw/git config -z --includes --get-urlmatch/,
-                "--file=$file", $key, $url ];
-        my $fh = popen_rd($cmd);
+        my (%env, %opt);
+        my $cmd = $self->config_cmd(\%env, \%opt);
+        push @$cmd, qw(-z --includes --get-urlmatch), $key, $url;
+        my $fh = popen_rd($cmd, \%env, \%opt);
         local $/ = "\0";
         my $val = <$fh>;
         if (!close($fh)) {
diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index 488006e0..8b62def2 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -281,7 +281,8 @@ our %CMD = ( # sorted in order of importance/use:
         "use a patch to generate a query for `lei q --stdin'",
         qw(stdin| in-format|F=s want|w=s@ uri debug), @net_opt, @c_opt ],
 'config' => [ '[...]', sub {
-                'git-config(1) wrapper for '._config_path($_[0]);
+                'git-config(1) wrapper for '._config_path($_[0]). "\n" .
+        '-l/--list and other common git-config uses are supported'
         }, qw(config-file|system|global|file|f=s), # for conflict detection
          qw(edit|e c=s@ C=s@), pass_through('git config') ],
 'inspect' => [ 'ITEMS...|--stdin', 'inspect lei/store and/or local external',
@@ -456,6 +457,7 @@ my %OPTDESC = (
 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
 
 'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
+'edit|e        config' => 'open an editor to modify the lei config file',
 ); # %OPTDESC
 
 my %CONFIG_KEYS = (
@@ -760,36 +762,6 @@ sub optparse ($$$) {
         $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
 }
 
-sub _tmp_cfg { # for lei -c <name>=<value> ...
-        my ($self) = @_;
-        my $cfg = _lei_cfg($self, 1);
-        require File::Temp;
-        my $ft = File::Temp->new(TEMPLATE => 'lei_cfg-XXXX', TMPDIR => 1);
-        my $tmp = { '-f' => $ft->filename, -tmp => $ft };
-        $ft->autoflush(1);
-        print $ft <<EOM or return fail($self, "$tmp->{-f}: $!");
-[include]
-        path = $cfg->{-f}
-EOM
-        $tmp = $self->{cfg} = bless { %$cfg, %$tmp }, ref($cfg);
-        for (@{$self->{opt}->{c}}) {
-                /\A([^=\.]+\.[^=]+)(?:=(.*))?\z/ or return fail($self, <<EOM);
-`-c $_' is not of the form -c <name>=<value>'
-EOM
-                my ($name, $value) = ($1, $2 // 1);
-                _config($self, '--add', $name, $value) or return;
-                if (defined(my $v = $tmp->{$name})) {
-                        if (ref($v) eq 'ARRAY') {
-                                push @$v, $value;
-                        } else {
-                                $tmp->{$name} = [ $v, $value ];
-                        }
-                } else {
-                        $tmp->{$name} = $value;
-                }
-        }
-}
-
 sub lazy_cb ($$$) { # $pfx is _complete_ or lei_
         my ($self, $cmd, $pfx) = @_;
         my $ucmd = $cmd;
@@ -819,7 +791,6 @@ sub dispatch {
         }
         if (my $cb = lazy_cb(__PACKAGE__, $cmd, 'lei_')) {
                 optparse($self, $cmd, \@argv) or return;
-                $self->{opt}->{c} and (_tmp_cfg($self) // return);
                 if (my $chdir = $self->{opt}->{C}) {
                         for my $d (@$chdir) {
                                 next if $d eq ''; # same as git(1)
@@ -844,17 +815,20 @@ sub _lei_cfg ($;$) {
         my $f = _config_path($self);
         my @st = stat($f);
         my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
-        my ($sto, $sto_dir, $watches, $lne);
-        if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
-                return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
+        my ($sto, $sto_dir, $watches, $lne, $cfg);
+        if ($cfg = $PATH2CFG{$f}) { # reuse existing object in common case
+                ($cur_st eq $cfg->{-st} && !$self->{opt}->{c}) and
+                        return ($self->{cfg} = $cfg);
+                # reuse some fields below if they match:
                 ($sto, $sto_dir, $watches, $lne) =
                                 @$cfg{qw(-lei_store leistore.dir -watches
                                         -lei_note_event)};
         }
         if (!@st) {
-                unless ($creat) {
-                        delete $self->{cfg};
-                        return bless {}, 'PublicInbox::Config';
+                unless ($creat) { # any commands which write to cfg must creat
+                        $cfg = PublicInbox::Config->git_config_dump(
+                                                        '/dev/null', $self);
+                        return ($self->{cfg} = $cfg);
                 }
                 my ($cfg_dir) = ($f =~ m!(.*?/)[^/]+\z!);
                 File::Path::mkpath($cfg_dir);
@@ -863,9 +837,8 @@ sub _lei_cfg ($;$) {
                 $cur_st = pack('dd', $st[10], $st[7]);
                 qerr($self, "# $f created") if $self->{cmd} ne 'config';
         }
-        my $cfg = PublicInbox::Config->git_config_dump($f, $self->{2});
+        $cfg = PublicInbox::Config->git_config_dump($f, $self);
         $cfg->{-st} = $cur_st;
-        $cfg->{'-f'} = $f;
         if ($sto && canonpath_harder($sto_dir // store_path($self))
                         eq canonpath_harder($cfg->{'leistore.dir'} //
                                                 store_path($self))) {
@@ -877,7 +850,7 @@ sub _lei_cfg ($;$) {
                 # FIXME: use inotify/EVFILT_VNODE to detect unlinked configs
                 delete(@PATH2CFG{grep(!-f, keys %PATH2CFG)});
         }
-        $self->{cfg} = $PATH2CFG{$f} = $cfg;
+        $self->{cfg} = $self->{opt}->{c} ? $cfg : ($PATH2CFG{$f} = $cfg);
         refresh_watches($self);
         $cfg;
 }
@@ -898,11 +871,41 @@ sub _lei_store ($;$) {
 sub _config {
         my ($self, @argv) = @_;
         my $err_ok = ($argv[0] // '') eq '+e' ? shift(@argv) : undef;
-        my %env = (%{$self->{env}}, GIT_CONFIG => undef);
+        my %env;
+        my %opt = map { $_ => $self->{$_} } (0..2);
         my $cfg = _lei_cfg($self, 1);
-        my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
-        my %rdr = map { $_ => $self->{$_} } (0..2);
-        waitpid(spawn($cmd, \%env, \%rdr), 0);
+        my $opt_c = delete local $cfg->{-opt_c};
+        my @file_arg;
+        if ($opt_c) {
+                my ($set, $get, $nondash);
+                for (@argv) { # order matters for git-config
+                        if (!$nondash) {
+                                if (/\A--(?:add|rename-section|remove-section|
+                                                replace-all|
+                                                unset-all|unset)\z/x) {
+                                        ++$set;
+                                } elsif ($_ eq '-l' || $_ eq '--list' ||
+                                                /\A--get/) {
+                                        ++$get;
+                                } elsif (/\A-/) { # -z and such
+                                } else {
+                                        ++$nondash;
+                                }
+                        } else {
+                                ++$nondash;
+                        }
+                }
+                if ($set || ($nondash//0) > 1 && !$get) {
+                        @file_arg = ('-f', $cfg->{-f});
+                        $env{GIT_CONFIG} = $file_arg[1];
+                } else { # OK, we can use `-c n=v' for read-only
+                        $cfg->{-opt_c} = $opt_c;
+                        $env{GIT_CONFIG} = undef;
+                }
+        }
+        my $cmd = $cfg->config_cmd(\%env, \%opt);
+        push @$cmd, @file_arg, @argv;
+        waitpid(spawn($cmd, \%env, \%opt), 0);
         $? == 0 ? 1 : ($err_ok ? undef : fail($self, $?));
 }
 
@@ -1545,7 +1548,7 @@ sub sto_done_request {
 
 sub cfg_dump ($$) {
         my ($lei, $f) = @_;
-        my $ret = eval { PublicInbox::Config->git_config_dump($f, $lei->{2}) };
+        my $ret = eval { PublicInbox::Config->git_config_dump($f, $lei) };
         return $ret if !$@;
         warn($@);
         undef;
diff --git a/lib/PublicInbox/LeiConfig.pm b/lib/PublicInbox/LeiConfig.pm
index fd4b0eca..76fc43e7 100644
--- a/lib/PublicInbox/LeiConfig.pm
+++ b/lib/PublicInbox/LeiConfig.pm
@@ -1,8 +1,7 @@
-# Copyright (C) 2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
-package PublicInbox::LeiConfig;
-use strict;
-use v5.10.1;
+package PublicInbox::LeiConfig; # subclassed by LeiEditSearch
+use v5.12;
 use PublicInbox::PktOp;
 use Fcntl qw(SEEK_SET);
 use autodie qw(open seek);
@@ -41,10 +40,18 @@ sub lei_config {
         my ($lei, @argv) = @_;
         $lei->{opt}->{'config-file'} and return $lei->fail(
                 "config file switches not supported by `lei config'");
-        return $lei->_config(@argv) unless $lei->{opt}->{edit};
-        my $f = $lei->_lei_cfg(1)->{-f};
-        my $self = bless { lei => $lei, -f => $f }, __PACKAGE__;
-        cfg_do_edit($self);
+        if ($lei->{opt}->{edit}) {
+                @argv and return $lei->fail(
+'--edit must be used without other arguments');
+                $lei->{opt}->{c} and return $lei->fail(
+"`-c $lei->{opt}->{c}->[0]' not allowed with --edit");
+                my $f = $lei->_lei_cfg(1)->{-f};
+                cfg_do_edit(bless { lei => $lei, -f => $f }, __PACKAGE__);
+        } elsif (@argv) { # let git-config do error-checking
+                $lei->_config(@argv);
+        } else {
+                $lei->_help('no options given');
+        }
 }
 
 1;
diff --git a/lib/PublicInbox/LeiMirror.pm b/lib/PublicInbox/LeiMirror.pm
index bed034f1..fed6b668 100644
--- a/lib/PublicInbox/LeiMirror.pm
+++ b/lib/PublicInbox/LeiMirror.pm
@@ -193,7 +193,8 @@ sub _write_inbox_config {
         } elsif (!$!{EEXIST}) {
                 die "open($f): $!";
         }
-        my $cfg = PublicInbox::Config->git_config_dump($f, $self->{lei}->{2});
+        my $cfg = PublicInbox::Config->git_config_dump($f,
+                                                { 2 => $self->{lei}->{2} });
         my $ibx = $self->{ibx} = {}; # for indexing
         for my $sec (grep(/\Apublicinbox\./, @{$cfg->{-section_order}})) {
                 for (qw(address newsgroup nntpmirror)) {
@@ -238,7 +239,7 @@ sub index_cloned_inbox {
                 }
                 # force synchronous awaitpid for v2:
                 local $PublicInbox::DS::in_loop = 0;
-                my $cfg = PublicInbox::Config->new(undef, $lei->{2});
+                my $cfg = PublicInbox::Config->new(undef, { 2 => $lei->{2} });
                 my $env = PublicInbox::Admin::index_prepare($opt, $cfg);
                 local %ENV = (%ENV, %$env) if $env;
                 PublicInbox::Admin::progress_prepare($opt, $lei->{2});
diff --git a/t/lei.t b/t/lei.t
index 1199ca75..3ac804a8 100644
--- a/t/lei.t
+++ b/t/lei.t
@@ -40,10 +40,21 @@ my $test_help = sub {
         lei_ok(qw(config -h));
         like($lei_out, qr! \Q$home\E/\.config/lei/config\b!,
                 'actual path shown in config -h');
+        my $exp_help = qr/\Q$lei_out\E/s;
+        ok(!lei('config'), 'config w/o args fails');
+        like($lei_err, $exp_help, 'config w/o args shows our help in stderr');
         lei_ok(qw(config -h), { XDG_CONFIG_HOME => '/XDC' },
                 \'config with XDG_CONFIG_HOME');
         like($lei_out, qr! /XDC/lei/config\b!, 'XDG_CONFIG_HOME in config -h');
         is($lei_err, '', 'no errors from config -h');
+
+        lei_ok(qw(-c foo.bar config dash.c works));
+        lei_ok(qw(config dash.c));
+        is($lei_out, "works\n", 'config set w/ -c');
+
+        lei_ok(qw(-c foo.bar config --add dash.c add-works));
+        lei_ok(qw(config --get-all dash.c));
+        is($lei_out, "works\nadd-works\n", 'config --add w/ -c');
 };
 
 my $ok_err_info = sub {
@@ -101,9 +112,11 @@ my $test_config = sub {
         is($lei_out, "tr00\n", "-c string value passed as-is");
         lei_ok(qw(-c imap.debug=a -c imap.debug=b config --get-all imap.debug));
         is($lei_out, "a\nb\n", '-c and --get-all work together');
-
-        lei_ok([qw(config -e)], { VISUAL => 'cat', EDITOR => 'cat' });
+        my $env = { VISUAL => 'cat', EDITOR => 'cat' };
+        lei_ok([qw(config -e)], $env);
         is($lei_out, "[a]\n\tb = c\n", '--edit works');
+        ok(!lei([qw(-c a.b=c config -e)], $env), '-c conflicts with -e');
+        like($lei_err, qr/not allowed/, 'error message shown');
 };
 
 my $test_completion = sub {