accrual: Introduce logging infrastructure.

conservancy_beancount/reports/accrual.py

@@ -62,6 +62,7 @@ import argparse
 import collections
 import datetime
 import enum
+import logging
 import re
 import sys
 
@@ -98,6 +99,8 @@ from .. import rtutil
 PostGroups = Mapping[Optional[MetaValue], core.RelatedPostings]
 RTObject = Mapping[str, str]
 
+_logger = logging.getLogger('conservancy_beancount.reports.accrual')
+
 class Account(NamedTuple):
     name: str
     balance_paid: Callable[[core.Balance], bool]
@@ -129,9 +132,9 @@ class AccrualAccount(enum.Enum):
 
 
 class BaseReport:
-    def __init__(self, out_file: TextIO, err_file: TextIO) -> None:
+    def __init__(self, out_file: TextIO) -> None:
         self.out_file = out_file
-        self.err_file = err_file
+        self.logger = _logger.getChild(type(self).__name__)
 
     def _since_last_nonzero(self, posts: core.RelatedPostings) -> core.RelatedPostings:
         retval = core.RelatedPostings()
@@ -170,11 +173,10 @@ class BalanceReport(BaseReport):
 
 
 class OutgoingReport(BaseReport):
-    def __init__(self, rt_client: rt.Rt, out_file: TextIO, err_file: TextIO) -> None:
+    def __init__(self, rt_client: rt.Rt, out_file: TextIO) -> None:
+        super().__init__(out_file)
         self.rt_client = rt_client
         self.rt_wrapper = rtutil.RT(rt_client)
-        self.out_file = out_file
-        self.err_file = err_file
 
     def _primary_rt_id(self, posts: core.RelatedPostings) -> rtutil.TicketAttachmentIds:
         rt_ids = posts.all_meta_links('rt-id')
@@ -202,10 +204,10 @@ class OutgoingReport(BaseReport):
             ticket = None
             errmsg = error.args[0]
         if ticket is None:
-            print("error: can't generate outgoings report for {}"
-                  " because no RT ticket available: {}".format(
-                      invoice, errmsg,
-                  ), file=self.err_file)
+            self.logger.error(
+                "can't generate outgoings report for %s because no RT ticket available: %s",
+                invoice, errmsg,
+            )
             return
 
         try:
@@ -379,11 +381,23 @@ metadata to match. A single ticket number is a shortcut for
     args.search_terms = [SearchTerm.parse(s) for s in args.search]
     return args
 
+def setup_logger(logger: logging.Logger, loglevel: int, stream: TextIO=sys.stderr) -> None:
+    formatter = logging.Formatter('%(name)s: %(levelname)s: %(message)s')
+    handler = logging.StreamHandler(stream)
+    handler.setFormatter(formatter)
+    logger.addHandler(handler)
+    logger.setLevel(loglevel)
+
 def main(arglist: Optional[Sequence[str]]=None,
          stdout: TextIO=sys.stdout,
          stderr: TextIO=sys.stderr,
          config: Optional[configmod.Config]=None,
+         logger: Optional[logging.Logger]=None,
 ) -> int:
+    if logger is None:
+        global _logger
+        _logger = logger = logging.getLogger('accrual-report')
+        setup_logger(_logger, logging.INFO, stderr)
     returncode = 0
     args = parse_arguments(arglist)
     if config is None:
@@ -412,20 +426,17 @@ def main(arglist: Optional[Sequence[str]]=None,
     if args.report_type is None:
         args.report_type = ReportType.default_for(groups)
     if not groups:
-        print("warning: no matching entries found to report", file=stderr)
+        logger.warning("no matching entries found to report")
         returncode |= ReturnFlag.NOTHING_TO_REPORT
     report: Optional[BaseReport] = None
     if args.report_type is ReportType.OUTGOING:
         rt_client = config.rt_client()
         if rt_client is None:
-            print(
-                "error: unable to generate outgoing report: RT client is required",
-                file=stderr,
-            )
+            logger.error("unable to generate outgoing report: RT client is required")
         else:
-            report = OutgoingReport(rt_client, stdout, stderr)
+            report = OutgoingReport(rt_client, stdout)
     else:
-        report = args.report_type.value(stdout, stderr)
+        report = args.report_type.value(stdout)
     if report is None:
         returncode |= ReturnFlag.REPORT_ERRORS
     else:

tests/test_reports_accrual.py

@@ -259,10 +259,9 @@ def run_outgoing(invoice, postings, rt_client=None):
     if not isinstance(postings, core.RelatedPostings):
         postings = relate_accruals_by_meta(postings, invoice)
     output = io.StringIO()
-    errors = io.StringIO()
-    report = accrual.OutgoingReport(rt_client, output, errors)
+    report = accrual.OutgoingReport(rt_client, output)
     report.run({invoice: postings})
-    return output, errors
+    return output
 
 @pytest.mark.parametrize('invoice,expected', [
     ('rt:505/5050', "Zero balance outstanding since 2020-05-05"),
@@ -270,22 +269,21 @@ def run_outgoing(invoice, postings, rt_client=None):
     ('rt:510/6100', "-280.00 USD outstanding since 2020-06-10"),
     ('rt://ticket/515/attachments/5150', "1,500.00 USD outstanding since 2020-05-15",),
 ])
-def test_balance_report(accrual_postings, invoice, expected):
+def test_balance_report(accrual_postings, invoice, expected, caplog):
     related = relate_accruals_by_meta(accrual_postings, invoice)
     output = io.StringIO()
-    errors = io.StringIO()
-    report = accrual.BalanceReport(output, errors)
+    report = accrual.BalanceReport(output)
     report.run({invoice: related})
-    assert not errors.getvalue()
+    assert not caplog.records
     check_output(output, [invoice, expected])
 
-def test_outgoing_report(accrual_postings):
+def test_outgoing_report(accrual_postings, caplog):
     invoice = 'rt:510/6100'
-    output, errors = run_outgoing(invoice, accrual_postings)
+    output = run_outgoing(invoice, accrual_postings)
     rt_url = RTClient.DEFAULT_URL[:-9]
     rt_id_url = rf'\b{re.escape(f"{rt_url}Ticket/Display.html?id=510")}\b'
     contract_url = rf'\b{re.escape(f"{rt_url}Ticket/Attachment/4000/4000/contract.pdf")}\b'
-    print(output.getvalue())
+    assert not caplog.records
     check_output(output, [
         r'^PAYMENT FOR APPROVAL:$',
         r'^REQUESTOR: Mx\. 510 <mx510@example\.org>$',
@@ -304,11 +302,11 @@ def test_outgoing_report(accrual_postings):
         r'^\s+Expenses:FilingFees\s+60\.00 USD$',
     ])
 
-def test_outgoing_report_custom_field_fallbacks(accrual_postings):
+def test_outgoing_report_custom_field_fallbacks(accrual_postings, caplog):
     invoice = 'rt:510/6100'
     rt_client = RTClient(want_cfs=False)
-    output, errors = run_outgoing(invoice, accrual_postings, rt_client)
-    assert not errors.getvalue()
+    output = run_outgoing(invoice, accrual_postings, rt_client)
+    assert not caplog.records
     check_output(output, [
         r'^PAYMENT FOR APPROVAL:$',
         r'^REQUESTOR: <mx510@example\.org>$',
@@ -316,10 +314,10 @@ def test_outgoing_report_custom_field_fallbacks(accrual_postings):
         r'^PAYMENT METHOD:\s*$',
     ])
 
-def test_outgoing_report_fx_amounts(accrual_postings):
+def test_outgoing_report_fx_amounts(accrual_postings, caplog):
     invoice = 'rt:520/5200'
-    output, errors = run_outgoing(invoice, accrual_postings)
-    assert not errors.getvalue()
+    output = run_outgoing(invoice, accrual_postings)
+    assert not caplog.records
     check_output(output, [
         r'^PAYMENT FOR APPROVAL:$',
         r'^REQUESTOR: Mx\. 520 <mx520@example\.org>$',
@@ -417,7 +415,7 @@ def test_main_no_books():
 ])
 def test_main_no_matches(arglist):
     check_main_fails(arglist, None, 8, [
-        r'^warning: no matching entries found to report$',
+        r': WARNING: no matching entries found to report$',
     ])
 
 def test_main_no_rt():
@@ -425,5 +423,5 @@ def test_main_no_rt():
         books_path=testutil.test_path('books/accruals.beancount'),
     )
     check_main_fails(['-t', 'out'], config, 4, [
-        r'^error: unable to generate outgoing report: RT client is required\b',
+        r': ERROR: unable to generate outgoing report: RT client is required\b',
     ])