Add new sub-command to get email with changes

If the user does not use mutt and cannot change the command for sending
mail to our utility, then you can start a fake smtp server that will
receive the email and execute the jira commands.

Signed-off-by: Alexey Gladkov <[email protected]>

README.md

@@ -97,6 +97,22 @@ jira issue <ISSUE-123> change \
     <field3> set <value3>
 ```
 
+### Sub-Command: jiramail smtp
+
+An alternative variant for applying changes. If your MUA does not have settings
+to change the email sending utility (usually sendmail), then you can run a fake
+smtp server.
+
+You can specify a login and password to restrict access to smtp and jira
+changes:
+
+```ini
+[smtp]
+user = <username>
+password = <secret>
+port = 10025
+```
+
 ## License
 
 jiramail is licensed under the GNU General Public License (GPL), version 3.

jiramail/change.py

@@ -351,7 +351,9 @@ def args(self) -> List[str]:
         return []
 
     def add_raw(self, line: str) -> None:
-        if line.endswith("\n"):
+        if line.endswith("\r\n"):
+            self.raw.append(line[:-2])
+        elif line.endswith("\n"):
             self.raw.append(line[:-1])
         else:
             self.raw.append(line)

jiramail/command.py

@@ -33,6 +33,11 @@ def cmd_info(cmdargs: argparse.Namespace) -> int:
     return jiramail.info.main(cmdargs)
 
 
+def cmd_smtp(cmdargs: argparse.Namespace) -> int:
+    import jiramail.smtp
+    return jiramail.smtp.main(cmdargs)
+
+
 def add_common_arguments(parser: argparse.ArgumentParser) -> None:
     parser.add_argument("-v", "--verbose",
                         dest="verbose", action='count', default=0,
@@ -142,6 +147,7 @@ def setup_parser() -> argparse.ArgumentParser:
     # jiramail info
     sp3_description = """\
 retrieves issue information from the jira API.
+
 """
     sp3 = subparsers.add_parser("info",
                                 description=sp3_description,
@@ -155,6 +161,29 @@ def setup_parser() -> argparse.ArgumentParser:
                      help="specify the issue to export.")
     add_common_arguments(sp3)
 
+    # jiramail smtp
+    sp4_description = """\
+fake smtp server for receiving commands in sent emails. This is an alternative,
+easier way to send commands.
+"""
+    sp4 = subparsers.add_parser("smtp",
+                                description=sp4_description,
+                                help=sp4_description,
+                                epilog=epilog,
+                                add_help=False)
+    sp4.set_defaults(func=cmd_smtp)
+
+    sp4.add_argument("-n", "--dry-run",
+                     dest="dry_run", action="store_true",
+                     help="do not act, just print what would happen.")
+    sp4.add_argument("-1", "--one-message",
+                     dest="one_message", action="store_true",
+                     help="exit after processing one incoming email.")
+    sp4.add_argument("-m", "--mailbox",
+                     dest="mailbox", action="store", default="",
+                     help="path to mailbox to store a reply messages with the status of command execution.")
+    add_common_arguments(sp4)
+
     return parser