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+From: Stefano Zacchiroli <zack@upsilon.cc>\r
+To: notmuch@notmuchmail.org\r
+Subject: [PATCH 2/3] notmuch-mutt: support for messages that lack Message-ID\r
+ headers\r
+Date: Sat, 24 Jan 2015 10:11:40 +0100\r
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+References: <1422090701-19385-1-git-send-email-zack@upsilon.cc>\r
+Cc: "Jan N. Klug" <jan.n.klug@rub.de>, Stefano Zacchiroli <zack@upsilon.cc>\r
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+\r
+From: "Jan N. Klug" <jan.n.klug@rub.de>\r
+\r
+For those messages, compute a synthetic Message-ID based on the SHA1\r
+of the whole message, in the same way that notmuch would do. See:\r
+http://git.notmuchmail.org/git/notmuch/blob/HEAD:/lib/sha1.c\r
+\r
+To do the above, rewrite get_message_id() to scan the current message\r
+line by line, incrementally computing a SHA1. As a consequence, drop\r
+the dependency on Mail::Internet.\r
+\r
+Signed-off-by: Stefano Zacchiroli <zack@upsilon.cc>\r
+---\r
+ contrib/notmuch-mutt/README | 4 ++--\r
+ contrib/notmuch-mutt/notmuch-mutt | 23 ++++++++++++++++++-----\r
+ 2 files changed, 20 insertions(+), 7 deletions(-)\r
+\r
+diff --git a/contrib/notmuch-mutt/README b/contrib/notmuch-mutt/README\r
+index c661447..0013ed0 100644\r
+--- a/contrib/notmuch-mutt/README\r
++++ b/contrib/notmuch-mutt/README\r
+@@ -33,10 +33,10 @@ Requirements\r
+ \r
+ To *run* notmuch-mutt you will need Perl with the following libraries:\r
+ \r
++- Digest::SHA <https://metacpan.org/release/Digest-SHA>\r
++ (Debian package: libdigest-sha-perl)\r
+ - Mail::Box <https://metacpan.org/pod/Mail::Box>\r
+ (Debian package: libmail-box-perl)\r
+-- Mail::Internet <https://metacpan.org/pod/Mail::Internet>\r
+- (Debian package: libmailtools-perl)\r
+ - String::ShellQuote <https://metacpan.org/pod/String::ShellQuote>\r
+ (Debian package: libstring-shellquote-perl)\r
+ - Term::ReadLine::Gnu <https://metacpan.org/pod/Term::ReadLine::Gnu>\r
+diff --git a/contrib/notmuch-mutt/notmuch-mutt b/contrib/notmuch-mutt/notmuch-mutt\r
+index 4969e4b..4d30b0b 100755\r
+--- a/contrib/notmuch-mutt/notmuch-mutt\r
++++ b/contrib/notmuch-mutt/notmuch-mutt\r
+@@ -13,11 +13,11 @@ use warnings;\r
+ \r
+ use File::Path;\r
+ use Getopt::Long qw(:config no_getopt_compat);\r
+-use Mail::Internet;\r
+ use Mail::Box::Maildir;\r
+ use Pod::Usage;\r
+ use String::ShellQuote;\r
+ use Term::ReadLine;\r
++use Digest::SHA;\r
+ \r
+ \r
+ my $xdg_cache_dir = "$ENV{HOME}/.cache";\r
+@@ -75,10 +75,23 @@ sub prompt($$) {\r
+ }\r
+ \r
+ sub get_message_id() {\r
+- my $mail = Mail::Internet->new(\*STDIN);\r
+- my $mid = $mail->head->get("message-id") or return undef;\r
+- $mid =~ /^<(.*)>$/; # get message-id value\r
+- return $1;\r
++ my $mid = undef;\r
++ my $sha = Digest::SHA->new(1); # SHA1 hashing\r
++\r
++ while(<STDIN>) { # scan message line by line, looking for mid\r
++ if ($_ =~ /^Message-ID:\s*<(.*)>$/i) {\r
++ $mid = $1;\r
++ last; # message-id found, abort scan\r
++ }\r
++ $sha->add($_); # update hash\r
++ }\r
++\r
++ # Generate message-id from hash if none was found, in the same way\r
++ # that notmuch would do.\r
++ # See: http://git.notmuchmail.org/git/notmuch/blob/HEAD:/lib/sha1.c\r
++ $mid ||= "notmuch-sha1-".$sha->hexdigest;\r
++\r
++ return $mid;\r
+ }\r
+ \r
+ sub search_action($$$@) {\r
+-- \r
+2.1.4\r
+\r