[pve-devel] [PATCH common/manager v2] adapt PVE::Tools::sendmail to match rust-implementation and use it for apt update notifications

[Stoiko Ivanov]

v1->v2:
* dropped the moving of the email regex for reuse in the sendmail helper:
  we use local usernames (mostly 'root') quite extensively in our code-base and
  our users probably do so as well (for backup notifications)
* replaced the direct invocation of /usr/sbin/sendmail by a call to the helper
  in pve-manager/PVE/API2/APT.pm
* adapted the sendmail-helper to allow for an empty display name in the from
  header, since the apt update notification mail got sent without one.

The second patch in pve-common can be squashed into the first one, if
preferred.

original cover-letter for v1:
The 2 patches adapt PVE::Tools::sendmail to closely match the recently merged
implementation in our rust repository - see [0].

I moved the email regex from JSONSchema to Tools to reuse it for the sendmail
function (and eliminate one of the few email-address regexes in our codebase).

I did not add a dependency on libtimedate-perl (where Date::Format is), since
we already use  Date::Parse in PVE::Certificate, without explicit dependency,
and it gets pulled in via libwww-perl -> libhttp-date-perl -> libtimedate-perl.

Glad to send an update for the dependency of course.

[0] https://lists.proxmox.com/pipermail/pbs-devel/2020-August/000423.html

Stoiko Ivanov (2):
  move email regex from JSONSchema to Tools
  sendmail-helper: only send multipart if necessary

 src/PVE/JSONSchema.pm |  4 ++--
 src/PVE/Tools.pm      | 49 +++++++++++++++++++++++++++++--------------
 2 files changed, 35 insertions(+), 18 deletions(-)

pve-common:
Stoiko Ivanov (2):
  sendmail-helper: only send multipart if necessary
  sendmail helper: allow empty display name in from

 src/PVE/Tools.pm | 43 +++++++++++++++++++++++++++++--------------
 1 file changed, 29 insertions(+), 14 deletions(-)

pve-manager:
Stoiko Ivanov (1):
  use PVE::Tools::sendmail for update notifications

 PVE/API2/APT.pm | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

-- 
2.20.1