* [PATCH 0/2] more spawn improvements
@ 2019-12-30 5:04 7% Eric Wong
2019-12-30 5:04 6% ` [PATCH 1/2] spawn: support chdir via -C option Eric Wong
0 siblings, 1 reply; 2+ results
From: Eric Wong @ 2019-12-30 5:04 UTC (permalink / raw)
To: meta
Less code overall and improved git compatibility. Maybe one day
posix_spawn(3) can get rlimit support and we can just use that:
http://austingroupbugs.net/view.php?id=603
Eric Wong (2):
spawn: support chdir via -C option
spawn: better error handling
lib/PublicInbox/Admin.pm | 31 +++++++----------------
lib/PublicInbox/SolverGit.pm | 6 ++---
lib/PublicInbox/Spawn.pm | 48 ++++++++++++++++--------------------
lib/PublicInbox/SpawnPP.pm | 7 ++++--
4 files changed, 38 insertions(+), 54 deletions(-)
^ permalink raw reply [relevance 7%]
* [PATCH 1/2] spawn: support chdir via -C option
2019-12-30 5:04 7% [PATCH 0/2] more spawn improvements Eric Wong
@ 2019-12-30 5:04 6% ` Eric Wong
0 siblings, 0 replies; 2+ results
From: Eric Wong @ 2019-12-30 5:04 UTC (permalink / raw)
To: meta
This simplifies our admin module a bit and allows solver to be
used with v1 inboxes using git versions prior to v1.8.5 (but
still >= git v1.8.0).
---
lib/PublicInbox/Admin.pm | 31 +++++++++----------------------
lib/PublicInbox/SolverGit.pm | 6 +++---
lib/PublicInbox/Spawn.pm | 8 ++++++--
lib/PublicInbox/SpawnPP.pm | 7 +++++--
4 files changed, 23 insertions(+), 29 deletions(-)
diff --git a/lib/PublicInbox/Admin.pm b/lib/PublicInbox/Admin.pm
index 5a3554cf..44b44b6e 100644
--- a/lib/PublicInbox/Admin.pm
+++ b/lib/PublicInbox/Admin.pm
@@ -10,6 +10,7 @@ use Cwd 'abs_path';
use base qw(Exporter);
our @EXPORT_OK = qw(resolve_repo_dir);
require PublicInbox::Config;
+use PublicInbox::Spawn qw(popen_rd);
sub resolve_repo_dir {
my ($cd, $ver) = @_;
@@ -18,28 +19,14 @@ sub resolve_repo_dir {
$$ver = 2 if $ver;
return abs_path($prefix);
}
-
- my @cmd = qw(git rev-parse --git-dir);
- my $cmd = join(' ', @cmd);
- my $pid = open my $fh, '-|';
- defined $pid or die "forking $cmd failed: $!\n";
- if ($pid == 0) {
- if (defined $cd) {
- chdir $cd or die "chdir $cd failed: $!\n";
- }
- exec @cmd;
- die "Failed to exec $cmd: $!\n";
- } else {
- my $dir = eval {
- local $/;
- <$fh>;
- };
- close $fh or die "error in $cmd (cwd:$cd): $!\n";
- chomp $dir;
- $$ver = 1 if $ver;
- return abs_path($cd) if ($dir eq '.' && defined $cd);
- abs_path($dir);
- }
+ my $cmd = [ qw(git rev-parse --git-dir) ];
+ my $fh = popen_rd($cmd, undef, {-C => $cd});
+ my $dir = do { local $/; <$fh> };
+ close $fh or die "error in ".join(' ', @$cmd)." (cwd:$cd): $!\n";
+ chomp $dir;
+ $$ver = 1 if $ver;
+ return abs_path($cd) if ($dir eq '.' && defined $cd);
+ abs_path($dir);
}
# for unconfigured inboxes
diff --git a/lib/PublicInbox/SolverGit.pm b/lib/PublicInbox/SolverGit.pm
index 03666646..c57fb4c6 100644
--- a/lib/PublicInbox/SolverGit.pm
+++ b/lib/PublicInbox/SolverGit.pm
@@ -472,7 +472,7 @@ sub do_git_apply ($) {
my $patches = $self->{patches};
# we need --ignore-whitespace because some patches are CRLF
- my @cmd = (qw(git -C), $dn, qw(apply --cached --ignore-whitespace
+ my @cmd = (qw(git apply --cached --ignore-whitespace
--unidiff-zero --whitespace=warn --verbose));
my $len = length(join(' ', @cmd));
my $total = $self->{tot};
@@ -491,8 +491,8 @@ sub do_git_apply ($) {
} while (@$patches && $len < $ARG_SIZE_MAX &&
!oids_same_ish($patches->[0]->{oid_b}, $prv_oid_b));
- my $rdr = { 2 => 1 };
- my $qsp = PublicInbox::Qspawn->new(\@cmd, $self->{git_env}, $rdr);
+ my $opt = { 2 => 1, -C => $dn };
+ my $qsp = PublicInbox::Qspawn->new(\@cmd, $self->{git_env}, $opt);
$self->{-cur_di} = $di;
$self->{-qsp} = $qsp;
$qsp->psgi_qx($self->{psgi_env}, undef, \&apply_result, $self);
diff --git a/lib/PublicInbox/Spawn.pm b/lib/PublicInbox/Spawn.pm
index 6d42d5bc..d624c521 100644
--- a/lib/PublicInbox/Spawn.pm
+++ b/lib/PublicInbox/Spawn.pm
@@ -84,7 +84,8 @@ static void xerr(const char *msg)
* whatever we'll need in the future.
* Be sure to update PublicInbox::SpawnPP if this changes
*/
-int pi_fork_exec(SV *redirref, SV *file, SV *cmdref, SV *envref, SV *rlimref)
+int pi_fork_exec(SV *redirref, SV *file, SV *cmdref, SV *envref, SV *rlimref,
+ const char *cd)
{
AV *redir = (AV *)SvRV(redirref);
AV *cmd = (AV *)SvRV(cmdref);
@@ -118,6 +119,8 @@ int pi_fork_exec(SV *redirref, SV *file, SV *cmdref, SV *envref, SV *rlimref)
}
for (sig = 1; sig < NSIG; sig++)
signal(sig, SIG_DFL); /* ignore errors on signals */
+ if (*cd && chdir(cd) < 0)
+ xerr("chdir");
max = av_len(rlim);
for (i = 0; i < max; i += 3) {
@@ -216,7 +219,8 @@ sub spawn ($;$$) {
}
push @$rlim, $r, @$v;
}
- my $pid = pi_fork_exec($redir, $f, $cmd, \@env, $rlim);
+ my $cd = $opts->{'-C'} // ''; # undef => NULL mapping doesn't work?
+ my $pid = pi_fork_exec($redir, $f, $cmd, \@env, $rlim, $cd);
$pid < 0 ? undef : $pid;
}
diff --git a/lib/PublicInbox/SpawnPP.pm b/lib/PublicInbox/SpawnPP.pm
index 2ac02c56..cd682a6b 100644
--- a/lib/PublicInbox/SpawnPP.pm
+++ b/lib/PublicInbox/SpawnPP.pm
@@ -9,8 +9,8 @@ use warnings;
use POSIX qw(dup2 :signal_h);
# Pure Perl implementation for folks that do not use Inline::C
-sub pi_fork_exec ($$$$$) {
- my ($redir, $f, $cmd, $env, $rlim) = @_;
+sub pi_fork_exec ($$$$$$) {
+ my ($redir, $f, $cmd, $env, $rlim, $cd) = @_;
my $old = POSIX::SigSet->new();
my $set = POSIX::SigSet->new();
$set->fillset or die "fillset failed: $!";
@@ -33,6 +33,9 @@ sub pi_fork_exec ($$$$$) {
dup2($parent_fd, $child_fd) or
die "dup2($parent_fd, $child_fd): $!\n";
}
+ if ($cd ne '') {
+ chdir $cd or die "chdir $cd: $!";
+ }
if ($ENV{MOD_PERL}) {
exec which('env'), '-i', @$env, @$cmd;
die "exec env -i ... $cmd->[0] failed: $!\n";
^ permalink raw reply related [relevance 6%]
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