#! /usr/bin/python
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#

#
# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

# Copyright 2007, 2010 Richard Lowe
# Copyright 2019 OmniOS Community Edition (OmniOSce) Association.
# Copyright 2024 Bill Sommerfeld

#
# Check delta comments:
#	- Have the correct form.
#	- Have a synopsis matching that of the bug
#	- Appear only once.
#	- Do not contain common spelling errors.
#

import re, sys
from onbld.Checks.DbLookups import BugDB
from onbld.Checks.SpellCheck import spellcheck_line


bugre = re.compile(r'^(\d{2,7}) (.*)$')


def isBug(comment):
	return bugre.match(comment)

def changeid_present(comments):
	if len(comments) < 3:
		return False
	if comments[-2] != '':
		return False
	if re.match('^Change-Id: I[0-9a-f]+', comments[-1]):
		return True
	return False

def comchk(comments, check_db=True, output=sys.stderr, bugs=None):
	'''Validate checkin comments against ON standards.

	Comments must be a list of one-line comments, with no trailing
	newline.

	If check_db is True (the default), validate bug synopses against the
	databases.

	Error messages intended for the user are written to output,
	which defaults to stderr
	'''
	bugnospcre = re.compile(r'^(\d{2,7})([^ ].*)')
	ignorere = re.compile(r'^(' +
                              r'Portions contributed by|' +
                              r'Contributed by|' +
                              r'Reviewed[ -]by|' +
                              r'Approved[ -]by|' +
                              r'back[ -]?out)' +
                              r'[: ]')

	errors = { 'bugnospc': [],
		   'changeid': [],
		   'mutant': [],
		   'dup': [],
		   'nomatch': [],
		   'nonexistent': [],
		   'spelling': [] }
	if bugs is None:
		bugs = {}
	newbugs = set()
	ret = 0
	blanks = False

	if changeid_present(comments):
		comments = comments[:-2]
		errors['changeid'].append('Change Id present')

	lineno = 0
	for com in comments:
		lineno += 1

		# Our input must be newline-free, comments are line-wise.
		if com.find('\n') != -1:
			raise ValueError("newline in comment '%s'" % com)

		# Ignore valid comments we can't check
		if ignorere.search(com):
			continue

		if not com or com.isspace():
			blanks = True
			continue

		for err in spellcheck_line(com):
			errors['spelling'].append(
			    'comment line {} - {}'.format(lineno, err))

		match = bugre.search(com)
		if match:
			(bugid, synopsis) = match.groups()
			bugs.setdefault(bugid, []).append(synopsis)
			newbugs.add(bugid)
			continue

		#
		# Bugs missing a space after the ID are still bugs
		# for the purposes of the duplicate ID and synopsis
		# checks.
		#
		match = bugnospcre.search(com)
		if match:
			(bugid, synopsis) = match.groups()
			bugs.setdefault(bugid, []).append(synopsis)
			newbugs.add(bugid)
			errors['bugnospc'].append(com)
			continue

		# Anything else is bogus
		errors['mutant'].append(com)

	if len(bugs) > 0 and check_db:
		bugdb = BugDB()
		results = bugdb.lookup(list(bugs.keys()))

	for crid in sorted(newbugs):
		insts = bugs[crid]
		if len(insts) > 1:
			errors['dup'].append(crid)

		if not check_db:
			continue

		if crid not in results:
			errors['nonexistent'].append(crid)
			continue

		#
		# For each synopsis, compare the real synopsis with
		# that in the comments, allowing for possible '(fix
		# stuff)'-like trailing text
		#
		for entered in insts:
			synopsis = results[crid]["synopsis"]
			if not re.search(r'^' + re.escape(synopsis) +
					r'( \([^)]+\))?$', entered):
				errors['nomatch'].append([crid, synopsis,
							entered])


	if blanks:
		output.write("WARNING: Blank line(s) in comments\n")
		ret = 1

	if errors['dup']:
		ret = 1
		output.write("These IDs appear more than once in your "
			     "comments:\n")
		for err in errors['dup']:
			output.write("  %s\n" % err)

	if errors['bugnospc']:
		ret = 1
		output.write("These bugs are missing a single space following "
			     "the ID:\n")
		for com in errors['bugnospc']:
			output.write("  %s\n" % com)

	if errors['changeid']:
		ret = 1
		output.write("NOTE: Change-Id present in comment\n")

	if errors['mutant']:
		ret = 1
		output.write("These comments are not valid bugs:\n")
		for com in errors['mutant']:
			output.write("  %s\n" % com)

	if errors['nonexistent']:
		ret = 1
		output.write("These bugs were not found in the databases:\n")
		for id in errors['nonexistent']:
			output.write("  %s\n" % id)

	if errors['nomatch']:
		ret = 1
		output.write("These bug synopses don't match "
			     "the database entries:\n")
		for err in errors['nomatch']:
			output.write("Synopsis of %s is wrong:\n" % err[0])
			output.write("  should be: '%s'\n" % err[1])
			output.write("         is: '%s'\n" % err[2])

	if errors['spelling']:
		ret = 1
		output.write("Spellcheck:\n")
		for err in errors['spelling']:
			output.write('{}\n'.format(err))

	return ret