rename "ContentId" to "ContentHash"

The old name may be confused with "Content-ID" as described in
RFC 2392, so use an alternate name to avoid confusing future
readers.

10 files changed, 56 insertions, 56 deletions

diff --git a/Documentation/public-inbox-v2-format.pod b/Documentation/public-inbox-v2-format.pod
index d87a717d..9e284a75 100644
--- a/Documentation/public-inbox-v2-format.pod
+++ b/Documentation/public-inbox-v2-format.pod
@@ -159,7 +159,7 @@ top-level of the directory.
 
 =head1 OBJECT IDENTIFIERS
 
-There are three distinct type of identifiers.  content_id is the
+There are three distinct type of identifiers.  content_hash is the
 new one for v2 and should make message removal and deduplication
 easier.  object_id and Message-ID are already known.
 
@@ -179,11 +179,11 @@ The email header; duplicates allowed for archival purposes.
 This remains a searchable field in Xapian.  Note: it's possible
 for emails to have multiple Message-ID headers (and L<git-send-email(1)>
 had that bug for a bit); so we take all of them into account.
-In case of conflicts detected by content_id below, we generate a new
-Message-ID based on content_id; if the generated Message-ID still
+In case of conflicts detected by content_hash below, we generate a new
+Message-ID based on content_hash; if the generated Message-ID still
 conflicts, a random one is generated.
 
-=item content_id
+=item content_hash
 
 A hash of relevant headers and raw body content for
 purging of unwanted content.  This is not stored anywhere,
@@ -193,7 +193,7 @@ For now, the relevant headers are:
 
         Subject, From, Date, References, In-Reply-To, To, Cc
 
-Received, List-Id, and similar headers are NOT part of content_id as
+Received, List-Id, and similar headers are NOT part of content_hash as
 they differ across lists and we will want removal to be able to cross
 lists.
 
@@ -203,7 +203,7 @@ raw body risks being broken by list signatures; but we can use
 filters (e.g. PublicInbox::Filter::Vger) to clean the body for
 imports.
 
-content_id is SHA-256 for now; but can be changed at any time
+content_hash is SHA-256 for now; but can be changed at any time
 without making DB changes.
 
 =back
diff --git a/MANIFEST b/MANIFEST
index b1512c7a..7997bc99 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -99,7 +99,7 @@ lib/PublicInbox/AdminEdit.pm
 lib/PublicInbox/AltId.pm
 lib/PublicInbox/Cgit.pm
 lib/PublicInbox/Config.pm
-lib/PublicInbox/ContentId.pm
+lib/PublicInbox/ContentHash.pm
 lib/PublicInbox/DS.pm
 lib/PublicInbox/DSKQXS.pm
 lib/PublicInbox/DSPoll.pm
@@ -223,7 +223,7 @@ t/cgi.t
 t/check-www-inbox.perl
 t/config.t
 t/config_limiter.t
-t/content_id.t
+t/content_hash.t
 t/convert-compact.t
 t/data/0001.patch
 t/ds-kqxs.t
diff --git a/lib/PublicInbox/ContentId.pm b/lib/PublicInbox/ContentHash.pm
index 8d77934f..420dc5e7 100644
--- a/lib/PublicInbox/ContentId.pm
+++ b/lib/PublicInbox/ContentHash.pm
@@ -6,11 +6,11 @@
 # This is not stored in any database anywhere and may change
 # as changes in duplicate detection are needed.
 # See L<public-inbox-v2-format(5)> manpage for more details.
-package PublicInbox::ContentId;
+package PublicInbox::ContentHash;
 use strict;
 use warnings;
 use base qw/Exporter/;
-our @EXPORT_OK = qw/content_id content_digest/;
+our @EXPORT_OK = qw/content_hash content_digest/;
 use PublicInbox::MID qw(mids references);
 use PublicInbox::MsgIter;
 
@@ -60,7 +60,7 @@ sub content_digest ($) {
         # References: and In-Reply-To: get used interchangeably
         # in some "duplicates" in LKML.  We treat them the same
         # in SearchIdx, so treat them the same for this:
-        # do NOT consider the Message-ID as part of the content_id
+        # do NOT consider the Message-ID as part of the content_hash
         # if we got here, we've already got Message-ID reuse
         my %seen = map { $_ => 1 } @{mids($hdr)};
         foreach my $mid (@{references($hdr)}) {
@@ -92,7 +92,7 @@ sub content_digest ($) {
         $dig;
 }
 
-sub content_id ($) {
+sub content_hash ($) {
         content_digest($_[0])->digest;
 }
 
diff --git a/lib/PublicInbox/Import.pm b/lib/PublicInbox/Import.pm
index 07d18599..fc61d062 100644
--- a/lib/PublicInbox/Import.pm
+++ b/lib/PublicInbox/Import.pm
@@ -13,7 +13,7 @@ use PublicInbox::Spawn qw(spawn popen_rd);
 use PublicInbox::MID qw(mids mid2path);
 use PublicInbox::Address;
 use PublicInbox::MsgTime qw(msg_timestamp msg_datestamp);
-use PublicInbox::ContentId qw(content_digest);
+use PublicInbox::ContentHash qw(content_digest);
 use PublicInbox::MDA;
 use PublicInbox::Eml;
 use POSIX qw(strftime);
diff --git a/lib/PublicInbox/V2Writable.pm b/lib/PublicInbox/V2Writable.pm
index f599e0a0..bf5a0df9 100644
--- a/lib/PublicInbox/V2Writable.pm
+++ b/lib/PublicInbox/V2Writable.pm
@@ -13,7 +13,7 @@ use PublicInbox::Eml;
 use PublicInbox::Git;
 use PublicInbox::Import;
 use PublicInbox::MID qw(mids references);
-use PublicInbox::ContentId qw(content_id content_digest);
+use PublicInbox::ContentHash qw(content_hash content_digest);
 use PublicInbox::Inbox;
 use PublicInbox::OverIdx;
 use PublicInbox::Msgmap;
@@ -353,23 +353,23 @@ sub _replace_oids ($$$) {
         $rewrites;
 }
 
-sub content_ids ($) {
+sub content_hashes ($) {
         my ($mime) = @_;
-        my @cids = ( content_id($mime) );
+        my @chashes = ( content_hash($mime) );
 
         # We still support Email::MIME, here, and
         # Email::MIME->as_string doesn't always round-trip, so we may
-        # use a second content_id
-        my $rt = content_id(PublicInbox::Eml->new(\($mime->as_string)));
-        push @cids, $rt if $cids[0] ne $rt;
-        \@cids;
+        # use a second content_hash
+        my $rt = content_hash(PublicInbox::Eml->new(\($mime->as_string)));
+        push @chashes, $rt if $chashes[0] ne $rt;
+        \@chashes;
 }
 
 sub content_matches ($$) {
-        my ($cids, $existing) = @_;
-        my $cid = content_id($existing);
-        foreach (@$cids) {
-                return 1 if $_ eq $cid
+        my ($chashes, $existing) = @_;
+        my $chash = content_hash($existing);
+        foreach (@$chashes) {
+                return 1 if $_ eq $chash
         }
         0
 }
@@ -386,13 +386,13 @@ sub rewrite_internal ($$;$$$) {
                 $im = $self->importer;
         }
         my $over = $self->{over};
-        my $cids = content_ids($old_mime);
+        my $chashes = content_hashes($old_mime);
         my @removed;
         my $mids = mids($old_mime->header_obj);
 
         # We avoid introducing new blobs into git since the raw content
         # can be slightly different, so we do not need the user-supplied
-        # message now that we have the mids and content_id
+        # message now that we have the mids and content_hash
         $old_mime = undef;
         my $mark;
 
@@ -407,7 +407,7 @@ sub rewrite_internal ($$;$$$) {
                         }
                         my $orig = $$msg;
                         my $cur = PublicInbox::Eml->new($msg);
-                        if (content_matches($cids, $cur)) {
+                        if (content_matches($chashes, $cur)) {
                                 $gone{$smsg->{num}} = [ $smsg, $cur, \$orig ];
                         }
                 }
@@ -835,7 +835,7 @@ sub get_blob ($$) {
 sub content_exists ($$$) {
         my ($self, $mime, $mid) = @_;
         my $over = $self->{over};
-        my $cids = content_ids($mime);
+        my $chashes = content_hashes($mime);
         my ($id, $prev);
         while (my $smsg = $over->next_by_mid($mid, \$id, \$prev)) {
                 my $msg = get_blob($self, $smsg);
@@ -844,7 +844,7 @@ sub content_exists ($$$) {
                         next;
                 }
                 my $cur = PublicInbox::Eml->new($msg);
-                return 1 if content_matches($cids, $cur);
+                return 1 if content_matches($chashes, $cur);
 
                 # XXX DEBUG_DIFF is experimental and may be removed
                 diff($mid, $cur, $mime) if $ENV{DEBUG_DIFF};
@@ -873,9 +873,9 @@ sub mark_deleted ($$$$) {
         my $msgref = $git->cat_file($oid);
         my $mime = PublicInbox::Eml->new($$msgref);
         my $mids = mids($mime->header_obj);
-        my $cid = content_id($mime);
+        my $chash = content_hash($mime);
         foreach my $mid (@$mids) {
-                $sync->{D}->{"$mid\0$cid"} = $oid;
+                $sync->{D}->{"$mid\0$chash"} = $oid;
         }
 }
 
@@ -904,11 +904,11 @@ sub reindex_oid_m ($$$$;$) {
         my $msgref = $git->cat_file($oid, \$len);
         my $mime = PublicInbox::Eml->new($$msgref);
         my $mids = mids($mime->header_obj);
-        my $cid = content_id($mime);
+        my $chash = content_hash($mime);
         die "BUG: reindex_oid_m called for <=1 mids" if scalar(@$mids) <= 1;
 
         for my $mid (reverse @$mids) {
-                delete($sync->{D}->{"$mid\0$cid"}) and
+                delete($sync->{D}->{"$mid\0$chash"}) and
                         die "BUG: reindex_oid should handle <$mid> delete";
         }
         my $over = $self->{over};
@@ -1002,7 +1002,7 @@ sub reindex_oid ($$$$) {
         return if $len == 0; # purged
         my $mime = PublicInbox::Eml->new($$msgref);
         my $mids = mids($mime->header_obj);
-        my $cid = content_id($mime);
+        my $chash = content_hash($mime);
 
         if (scalar(@$mids) == 0) {
                 warn "E: $oid has no Message-ID, skipping\n";
@@ -1011,7 +1011,7 @@ sub reindex_oid ($$$$) {
                 my $mid = $mids->[0];
 
                 # was the file previously marked as deleted?, skip if so
-                if (delete($sync->{D}->{"$mid\0$cid"})) {
+                if (delete($sync->{D}->{"$mid\0$chash"})) {
                         if (!$sync->{reindex}) {
                                 $num = $sync->{regen}--;
                                 $self->{mm}->num_highwater($num);
@@ -1036,7 +1036,7 @@ sub reindex_oid ($$$$) {
         } else { # multiple MIDs are a weird case:
                 my $del = 0;
                 for (@$mids) {
-                        $del += delete($sync->{D}->{"$_\0$cid"}) // 0;
+                        $del += delete($sync->{D}->{"$_\0$chash"}) // 0;
                 }
                 if ($del) {
                         unindex_oid_remote($self, $oid, $_) for @$mids;
@@ -1309,7 +1309,7 @@ sub index_sync {
         return unless defined $latest;
         $self->idx_init($opt); # acquire lock
         my $sync = {
-                D => {}, # "$mid\0$cid" => $oid
+                D => {}, # "$mid\0$chash" => $oid
                 unindex_range => {}, # EPOCH => oid_old..oid_new
                 reindex => $opt->{reindex},
                 -opt => $opt
diff --git a/script/public-inbox-edit b/script/public-inbox-edit
index e895a228..d8e511b2 100755
--- a/script/public-inbox-edit
+++ b/script/public-inbox-edit
@@ -9,7 +9,7 @@ use warnings;
 use Getopt::Long qw(:config gnu_getopt no_ignore_case auto_abbrev);
 use PublicInbox::AdminEdit;
 use File::Temp 0.19 (); # 0.19 for TMPDIR
-use PublicInbox::ContentId qw(content_id);
+use PublicInbox::ContentHash qw(content_hash);
 use PublicInbox::MID qw(mid_clean mids);
 PublicInbox::Admin::check_require('-index');
 use PublicInbox::Eml;
@@ -43,7 +43,7 @@ if (defined $mid && defined $file) {
 my @ibxs = PublicInbox::Admin::resolve_inboxes(\@ARGV, $opt, $cfg);
 PublicInbox::AdminEdit::check_editable(\@ibxs);
 
-my $found = {}; # cid => [ [ibx, smsg] [, [ibx, smsg] ] ]
+my $found = {}; # chash => [ [ibx, smsg] [, [ibx, smsg] ] ]
 
 sub find_mid ($$$) {
         my ($found, $mid, $ibxs) = @_;
@@ -53,9 +53,9 @@ sub find_mid ($$$) {
                 while (my $smsg = $over->next_by_mid($mid, \$id, \$prev)) {
                         my $ref = $ibx->msg_by_smsg($smsg);
                         my $mime = PublicInbox::Eml->new($ref);
-                        my $cid = content_id($mime);
+                        my $chash = content_hash($mime);
                         my $tuple = [ $ibx, $smsg ];
-                        push @{$found->{$cid} ||= []}, $tuple
+                        push @{$found->{$chash} ||= []}, $tuple
                 }
                 PublicInbox::InboxWritable::cleanup($ibx);
         }
@@ -96,8 +96,8 @@ Multiple messages with different content found matching
                 die "open($file) failed: $!";
         my $mids = mids($mime->header_obj);
         find_mid($found, $_, \@ibxs) for (@$mids); # populates $found
-        my $cid = content_id($mime);
-        my $to_edit = $found->{$cid};
+        my $chash = content_hash($mime);
+        my $to_edit = $found->{$chash};
         unless ($to_edit) {
                 my $nr = scalar(keys %$found);
                 if ($nr > 0) {
@@ -115,7 +115,7 @@ $mids
                 }
                 exit 1;
         }
-        $found = { $cid => $to_edit };
+        $found = { $chash => $to_edit };
 }
 
 my %tmpopt = (
@@ -218,7 +218,7 @@ W: possible message boundary splitting error
         my $nhdr = $new_mime->header_obj;
         my $ohdr = $old_mime->header_obj;
         if (($nhdr->as_string eq $ohdr->as_string) &&
-            (content_id($new_mime) eq content_id($old_mime))) {
+            (content_hash($new_mime) eq content_hash($old_mime))) {
                 warn "No change detected to:\n", show_cmd($ibx, $smsg);
 
                 next unless $opt->{verbose};
diff --git a/t/content_id.t b/t/content_hash.t
index 9df81aa8..646aab07 100644
--- a/t/content_id.t
+++ b/t/content_hash.t
@@ -3,7 +3,7 @@
 use strict;
 use warnings;
 use Test::More;
-use PublicInbox::ContentId qw(content_id);
+use PublicInbox::ContentHash qw(content_hash);
 use PublicInbox::Eml;
 
 my $mime = PublicInbox::Eml->new(<<'EOF');
@@ -16,17 +16,17 @@ Date: Fri, 02 Oct 1993 00:00:00 +0000
 hello world
 EOF
 
-my $orig = content_id($mime);
-my $reload = content_id(PublicInbox::Eml->new($mime->as_string));
-is($orig, $reload, 'content_id matches after serialization');
+my $orig = content_hash($mime);
+my $reload = content_hash(PublicInbox::Eml->new($mime->as_string));
+is($orig, $reload, 'content_hash matches after serialization');
 
 foreach my $h (qw(From To Cc)) {
         my $n = q("Quoted N'Ame" <foo@EXAMPLE.com>);
         $mime->header_set($h, "$n");
-        my $q = content_id($mime);
-        is($mime->header($h), $n, "content_id does not mutate $h:");
+        my $q = content_hash($mime);
+        is($mime->header($h), $n, "content_hash does not mutate $h:");
         $mime->header_set($h, 'Quoted N\'Ame <foo@example.com>');
-        my $nq = content_id($mime);
+        my $nq = content_hash($mime);
         is($nq, $q, "quotes ignored in $h:");
 }
 
diff --git a/t/v1reindex.t b/t/v1reindex.t
index 13605f8b..9f23ef01 100644
--- a/t/v1reindex.t
+++ b/t/v1reindex.t
@@ -3,7 +3,7 @@
 use strict;
 use warnings;
 use Test::More;
-use PublicInbox::ContentId qw(content_digest);
+use PublicInbox::ContentHash qw(content_digest);
 use File::Path qw(remove_tree);
 use PublicInbox::TestCommon;
 use PublicInbox::Eml;
diff --git a/t/v2reindex.t b/t/v2reindex.t
index f16a0b0d..b99106d0 100644
--- a/t/v2reindex.t
+++ b/t/v2reindex.t
@@ -4,7 +4,7 @@ use strict;
 use warnings;
 use Test::More;
 use PublicInbox::Eml;
-use PublicInbox::ContentId qw(content_digest);
+use PublicInbox::ContentHash qw(content_digest);
 use File::Path qw(remove_tree);
 use PublicInbox::TestCommon;
 require_git(2.6);
diff --git a/t/v2writable.t b/t/v2writable.t
index e5a565ce..fa5c786e 100644
--- a/t/v2writable.t
+++ b/t/v2writable.t
@@ -4,7 +4,7 @@ use strict;
 use warnings;
 use Test::More;
 use PublicInbox::Eml;
-use PublicInbox::ContentId qw(content_digest content_id);
+use PublicInbox::ContentHash qw(content_digest content_hash);
 use PublicInbox::TestCommon;
 use Cwd qw(abs_path);
 require_git(2.6);
@@ -215,7 +215,7 @@ EOF
         $im = PublicInbox::V2Writable->new($ibx, {nproc => 2});
         is($im->{shards}, 1, 'detected single shard from previous');
         my ($mark, $rm_mime, $smsg) = $im->remove($mime, 'test removal');
-        is(content_id($rm_mime), content_id($mime),
+        is(content_hash($rm_mime), content_hash($mime),
                         'removed object returned matches');
         ok(defined($mark), 'mark set');
         $im->done;