Interpret aliases in:

  -  Header fields of patches generated by git format-patch
     (using --to, --cc, --add-header for example) or
     manually modified. Example of fields in header:

      To: alias1
      Cc: alias2
      Cc: alias3

  -  Outputs of command scripts specified by --cc-cmd and
     --to-cmd. Example of script:

      #!/bin/sh
      echo alias1
      echo alias2

Signed-off-by: Remi Lespinet <remi.lespi...@ensimag.grenoble-inp.fr>

---
Note that the --from option of git format-patch takes an argument which
must be formated as .*<.*> (if not, git format-patch will be aborted with
fatal: invalid ident line). For this reason, passing an alias as an
argument of --from is not possible, but modifying the from field in
the patch manually is.

 git-send-email.perl   |  2 ++
 t/t9001-send-email.sh | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+)

diff --git a/git-send-email.perl b/git-send-email.perl
index e1e9b14..0cac4b0 100755
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -1535,7 +1535,9 @@ foreach my $t (@files) {
                ($confirm =~ /^(?:auto|compose)$/ && $compose && $message_num 
== 1));
        $needs_confirm = "inform" if ($needs_confirm && $confirm_unconfigured 
&& @cc);
 
+       @to = expand_aliases(@to);
        @to = validate_address_list(sanitize_address_list(@to));
+       @cc = expand_aliases(@cc);
        @cc = validate_address_list(sanitize_address_list(@cc));
 
        @to = (@initial_to, @to);
diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh
index e63fc83..062c703 100755
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -1552,6 +1552,66 @@ test_expect_success $PREREQ 
'sendemail.aliasfile=~/.mailrc' '
        grep "^!someone@example\.org!$" commandline1
 '
 
+test_expect_success $PREREQ 'alias support in To header' '
+       clean_fake_sendmail &&
+       echo "alias sbd  some...@example.org" >.mailrc &&
+       test_config sendemail.aliasesfile ".mailrc" &&
+       test_config sendemail.aliasfiletype mailrc &&
+       git format-patch --stdout -1 --to=sbd >aliased.patch &&
+       git send-email \
+               --from="Example <nob...@example.com>" \
+               --smtp-server="$(pwd)/fake.sendmail" \
+               aliased.patch \
+               2>errors >out &&
+       grep "^!someone@example\.org!$" commandline1
+'
+
+test_expect_success $PREREQ 'alias support in Cc header' '
+       clean_fake_sendmail &&
+       echo "alias sbd  some...@example.org" >.mailrc &&
+       test_config sendemail.aliasesfile ".mailrc" &&
+       test_config sendemail.aliasfiletype mailrc &&
+       git format-patch --stdout -1 --cc=sbd >aliased.patch &&
+       git send-email \
+               --from="Example <nob...@example.com>" \
+               --smtp-server="$(pwd)/fake.sendmail" \
+               aliased.patch \
+               2>errors >out &&
+       grep "^!someone@example\.org!$" commandline1
+'
+
+test_expect_success $PREREQ 'tocmd works with aliases' '
+       clean_fake_sendmail &&
+       echo "alias sbd  some...@example.org" >.mailrc &&
+       test_config sendemail.aliasesfile ".mailrc" &&
+       test_config sendemail.aliasfiletype mailrc &&
+       git format-patch --stdout -1 >tocmd.patch &&
+       echo tocmd--sbd >>tocmd.patch &&
+       git send-email \
+               --from="Example <nob...@example.com>" \
+               --to-cmd=./tocmd-sed \
+               --smtp-server="$(pwd)/fake.sendmail" \
+               tocmd.patch \
+               2>errors >out &&
+       grep "^!someone@example\.org!$" commandline1
+'
+
+test_expect_success $PREREQ 'cccmd works with aliases' '
+       clean_fake_sendmail &&
+       echo "alias sbd  some...@example.org" >.mailrc &&
+       test_config sendemail.aliasesfile ".mailrc" &&
+       test_config sendemail.aliasfiletype mailrc &&
+       git format-patch --stdout -1 >cccmd.patch &&
+       echo cccmd--sbd >>cccmd.patch &&
+       git send-email \
+               --from="Example <nob...@example.com>" \
+               --cc-cmd=./cccmd-sed \
+               --smtp-server="$(pwd)/fake.sendmail" \
+               cccmd.patch \
+               2>errors >out &&
+       grep "^!someone@example\.org!$" commandline1
+'
+
 do_xmailer_test () {
        expected=$1 params=$2 &&
        git format-patch -1 &&
-- 
1.9.1

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