yama/get_message_ids

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#!/usr/bin/python3
import mailbox
import re
import sys
for f in sys.argv[1:]:
print("F", f)
mb = mailbox.mbox(f)
for m in mb:
try:
for match in re.findall(r'<(.*?)>', m["Message-ID"]):
print('M', match)
if "In-Reply-To" in m:
h = str(m["In-Reply-To"]) # sometimes it's a string,
# sometimes an email.header.Header. But the latter's
# __str__ method returns something sensible, so let's just
# force it to be a string
for match in re.findall(r'<(.*?)>', h):
print('I', match)
if "References" in m:
for match in re.findall(r'<(.*?)>', m["References"]):
print('R', match)
except:
print("Error in message:", file=sys.stderr)
print(m.as_string(), file=sys.stderr)
sys.exit(1)