From cd5b33fbdc0299765278d0b607b64202603f0882 Mon Sep 17 00:00:00 2001 From: Gregory Anders Date: Fri, 14 May 2021 09:15:53 -0600 Subject: [PATCH] git-send-email: add option to specify sendmail command The sendemail.smtpServer configuration option and --smtp-server command line option both support using a sendmail-like program to send emails by specifying an absolute file path. However, this is not ideal for the following reasons: 1. It overloads the meaning of smtpServer (now a program is being used for the server?) 2. It doesn't allow for non-absolute paths, arguments, or arbitrary scripting Requiring an absolute path is bad for portability, as the same program may be in different locations on different systems. If a user wishes to pass arguments to their program, they have to use the smtpServerOption option, which is cumbersome (as it must be repeated for each option) and doesn't adhere to normal git conventions. Introduce a new configuration option sendemail.sendmailCmd as well as a command line option --sendmail-cmd that can be used to specify a command (with or without arguments) or shell expression to run to send email. The name of this option is consistent with --to-cmd and --cc-cmd. This invocation honors the user's $PATH so that absolute paths are not necessary. Arbitrary shell expressions are also supported, allowing users to do basic scripting. Give this option a higher precedence over --smtp-server and sendemail.smtpServer, as the new interface is more flexible. For backward compatibility, continue to support absolute paths in --smtp-server and sendemail.smtpServer. Signed-off-by: Gregory Anders Signed-off-by: Junio C Hamano --- Documentation/git-send-email.txt | 25 ++++++++++++++++------- git-send-email.perl | 34 +++++++++++++++++++++++++------- t/t9001-send-email.sh | 31 +++++++++++++++++++++++++++++ 3 files changed, 76 insertions(+), 14 deletions(-) diff --git a/Documentation/git-send-email.txt b/Documentation/git-send-email.txt index 93708aefea..3db4eab4ba 100644 --- a/Documentation/git-send-email.txt +++ b/Documentation/git-send-email.txt @@ -167,6 +167,14 @@ Sending `sendemail.envelopeSender` configuration variable; if that is unspecified, choosing the envelope sender is left to your MTA. +--sendmail-cmd=:: + Specify a command to run to send the email. The command should + be sendmail-like; specifically, it must support the `-i` option. + The command will be executed in the shell if necessary. Default + is the value of `sendemail.sendmailcmd`. If unspecified, and if + --smtp-server is also unspecified, git-send-email will search + for `sendmail` in `/usr/sbin`, `/usr/lib` and $PATH. + --smtp-encryption=:: Specify the encryption to use, either 'ssl' or 'tls'. Any other value reverts to plain SMTP. Default is the value of @@ -211,13 +219,16 @@ a password is obtained using 'git-credential'. --smtp-server=:: If set, specifies the outgoing SMTP server to use (e.g. - `smtp.example.com` or a raw IP address). Alternatively it can - specify a full pathname of a sendmail-like program instead; - the program must support the `-i` option. Default value can - be specified by the `sendemail.smtpServer` configuration - option; the built-in default is to search for `sendmail` in - `/usr/sbin`, `/usr/lib` and $PATH if such program is - available, falling back to `localhost` otherwise. + `smtp.example.com` or a raw IP address). If unspecified, and if + `--sendmail-cmd` is also unspecified, the default is to search + for `sendmail` in `/usr/sbin`, `/usr/lib` and $PATH if such a + program is available, falling back to `localhost` otherwise. ++ +For backward compatibility, this option can also specify a full pathname +of a sendmail-like program instead; the program must support the `-i` +option. This method does not support passing arguments or using plain +command names. For those use cases, consider using `--sendmail-cmd` +instead. --smtp-server-port=:: Specifies a port different from the default port (SMTP diff --git a/git-send-email.perl b/git-send-email.perl index 1f425c0809..d9cff04067 100755 --- a/git-send-email.perl +++ b/git-send-email.perl @@ -70,6 +70,7 @@ git send-email --dump-aliases Sending: --envelope-sender * Email envelope sender. + --sendmail-cmd * Command to run to send email. --smtp-server * Outgoing SMTP server to use. The port is optional. Default 'localhost'. --smtp-server-option * Outgoing SMTP server option to use. @@ -243,6 +244,7 @@ my ($confirm); my (@suppress_cc); my ($auto_8bit_encoding); my ($compose_encoding); +my ($sendmail_cmd); # Variables with corresponding config settings & hardcoded defaults my ($debug_net_smtp) = 0; # Net::SMTP, see send_message() my $thread = 1; @@ -290,6 +292,7 @@ my %config_settings = ( "assume8bitencoding" => \$auto_8bit_encoding, "composeencoding" => \$compose_encoding, "transferencoding" => \$target_xfer_encoding, + "sendmailcmd" => \$sendmail_cmd, ); my %config_path_settings = ( @@ -423,6 +426,7 @@ $rc = GetOptions( "no-bcc" => \$no_bcc, "chain-reply-to!" => \$chain_reply_to, "no-chain-reply-to" => sub {$chain_reply_to = 0}, + "sendmail-cmd=s" => \$sendmail_cmd, "smtp-server=s" => \$smtp_server, "smtp-server-option=s" => \@smtp_server_options, "smtp-server-port=s" => \$smtp_server_port, @@ -996,16 +1000,19 @@ if (defined $reply_to) { $reply_to = sanitize_address($reply_to); } -if (!defined $smtp_server) { +if (!defined $sendmail_cmd && !defined $smtp_server) { my @sendmail_paths = qw( /usr/sbin/sendmail /usr/lib/sendmail ); push @sendmail_paths, map {"$_/sendmail"} split /:/, $ENV{PATH}; foreach (@sendmail_paths) { if (-x $_) { - $smtp_server = $_; + $sendmail_cmd = $_; last; } } - $smtp_server ||= 'localhost'; # could be 127.0.0.1, too... *shrug* + + if (!defined $sendmail_cmd) { + $smtp_server = 'localhost'; # could be 127.0.0.1, too... *shrug* + } } if ($compose && $compose > 0) { @@ -1485,11 +1492,17 @@ EOF if ($dry_run) { # We don't want to send the email. - } elsif (file_name_is_absolute($smtp_server)) { + } elsif (defined $sendmail_cmd || file_name_is_absolute($smtp_server)) { my $pid = open my $sm, '|-'; defined $pid or die $!; if (!$pid) { - exec($smtp_server, @sendmail_parameters) or die $!; + if (defined $sendmail_cmd) { + exec ("sh", "-c", "$sendmail_cmd \"\$@\"", "-", @sendmail_parameters) + or die $!; + } else { + exec ($smtp_server, @sendmail_parameters) + or die $!; + } } print $sm "$header\n$message"; close $sm or die $!; @@ -1585,14 +1598,21 @@ EOF printf($dry_run ? __("Dry-Sent %s\n") : __("Sent %s\n"), $subject); } else { print($dry_run ? __("Dry-OK. Log says:\n") : __("OK. Log says:\n")); - if (!file_name_is_absolute($smtp_server)) { + if (!defined $sendmail_cmd && !file_name_is_absolute($smtp_server)) { print "Server: $smtp_server\n"; print "MAIL FROM:<$raw_from>\n"; foreach my $entry (@recipients) { print "RCPT TO:<$entry>\n"; } } else { - print "Sendmail: $smtp_server ".join(' ',@sendmail_parameters)."\n"; + my $sm; + if (defined $sendmail_cmd) { + $sm = $sendmail_cmd; + } else { + $sm = $smtp_server; + } + + print "Sendmail: $sm ".join(' ',@sendmail_parameters)."\n"; } print $header, "\n"; if ($smtp) { diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh index 4eee9c3dcb..35289d9135 100755 --- a/t/t9001-send-email.sh +++ b/t/t9001-send-email.sh @@ -2097,6 +2097,37 @@ test_expect_success $PREREQ 'leading and trailing whitespaces are removed' ' test_cmp expected-list actual-list ' +test_expect_success $PREREQ 'test using command name with --sendmail-cmd' ' + clean_fake_sendmail && + PATH="$(pwd):$PATH" \ + git send-email \ + --from="Example " \ + --to=nobody@example.com \ + --sendmail-cmd="fake.sendmail" \ + HEAD^ && + test_path_is_file commandline1 +' + +test_expect_success $PREREQ 'test using arguments with --sendmail-cmd' ' + clean_fake_sendmail && + git send-email \ + --from="Example " \ + --to=nobody@example.com \ + --sendmail-cmd='\''"$(pwd)/fake.sendmail" -f nobody@example.com'\'' \ + HEAD^ && + test_path_is_file commandline1 +' + +test_expect_success $PREREQ 'test shell expression with --sendmail-cmd' ' + clean_fake_sendmail && + git send-email \ + --from="Example " \ + --to=nobody@example.com \ + --sendmail-cmd='\''f() { "$(pwd)/fake.sendmail" "$@"; };f'\'' \ + HEAD^ && + test_path_is_file commandline1 +' + test_expect_success $PREREQ 'invoke hook' ' mkdir -p .git/hooks && -- 2.32.0.93.g670b81a890