486 lines
17 KiB
Python
486 lines
17 KiB
Python
# Copyright (c) 2011 The Chromium OS Authors.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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import os
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import re
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import shutil
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import tempfile
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import command
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import commit
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import gitutil
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from series import Series
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# Tags that we detect and remove
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re_remove = re.compile('^BUG=|^TEST=|^BRANCH=|^Change-Id:|^Review URL:'
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'|Reviewed-on:|Commit-\w*:')
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# Lines which are allowed after a TEST= line
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re_allowed_after_test = re.compile('^Signed-off-by:')
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# Signoffs
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re_signoff = re.compile('^Signed-off-by: *(.*)')
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# The start of the cover letter
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re_cover = re.compile('^Cover-letter:')
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# A cover letter Cc
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re_cover_cc = re.compile('^Cover-letter-cc: *(.*)')
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# Patch series tag
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re_series_tag = re.compile('^Series-([a-z-]*): *(.*)')
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# Commit series tag
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re_commit_tag = re.compile('^Commit-([a-z-]*): *(.*)')
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# Commit tags that we want to collect and keep
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re_tag = re.compile('^(Tested-by|Acked-by|Reviewed-by|Patch-cc): (.*)')
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# The start of a new commit in the git log
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re_commit = re.compile('^commit ([0-9a-f]*)$')
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# We detect these since checkpatch doesn't always do it
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re_space_before_tab = re.compile('^[+].* \t')
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# States we can be in - can we use range() and still have comments?
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STATE_MSG_HEADER = 0 # Still in the message header
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STATE_PATCH_SUBJECT = 1 # In patch subject (first line of log for a commit)
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STATE_PATCH_HEADER = 2 # In patch header (after the subject)
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STATE_DIFFS = 3 # In the diff part (past --- line)
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class PatchStream:
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"""Class for detecting/injecting tags in a patch or series of patches
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We support processing the output of 'git log' to read out the tags we
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are interested in. We can also process a patch file in order to remove
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unwanted tags or inject additional ones. These correspond to the two
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phases of processing.
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"""
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def __init__(self, series, name=None, is_log=False):
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self.skip_blank = False # True to skip a single blank line
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self.found_test = False # Found a TEST= line
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self.lines_after_test = 0 # MNumber of lines found after TEST=
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self.warn = [] # List of warnings we have collected
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self.linenum = 1 # Output line number we are up to
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self.in_section = None # Name of start...END section we are in
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self.notes = [] # Series notes
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self.section = [] # The current section...END section
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self.series = series # Info about the patch series
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self.is_log = is_log # True if indent like git log
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self.in_change = 0 # Non-zero if we are in a change list
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self.blank_count = 0 # Number of blank lines stored up
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self.state = STATE_MSG_HEADER # What state are we in?
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self.signoff = [] # Contents of signoff line
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self.commit = None # Current commit
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def AddToSeries(self, line, name, value):
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"""Add a new Series-xxx tag.
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When a Series-xxx tag is detected, we come here to record it, if we
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are scanning a 'git log'.
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Args:
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line: Source line containing tag (useful for debug/error messages)
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name: Tag name (part after 'Series-')
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value: Tag value (part after 'Series-xxx: ')
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"""
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if name == 'notes':
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self.in_section = name
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self.skip_blank = False
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if self.is_log:
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self.series.AddTag(self.commit, line, name, value)
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def AddToCommit(self, line, name, value):
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"""Add a new Commit-xxx tag.
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When a Commit-xxx tag is detected, we come here to record it.
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Args:
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line: Source line containing tag (useful for debug/error messages)
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name: Tag name (part after 'Commit-')
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value: Tag value (part after 'Commit-xxx: ')
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"""
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if name == 'notes':
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self.in_section = 'commit-' + name
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self.skip_blank = False
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def CloseCommit(self):
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"""Save the current commit into our commit list, and reset our state"""
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if self.commit and self.is_log:
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self.series.AddCommit(self.commit)
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self.commit = None
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def ProcessLine(self, line):
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"""Process a single line of a patch file or commit log
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This process a line and returns a list of lines to output. The list
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may be empty or may contain multiple output lines.
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This is where all the complicated logic is located. The class's
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state is used to move between different states and detect things
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properly.
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We can be in one of two modes:
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self.is_log == True: This is 'git log' mode, where most output is
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indented by 4 characters and we are scanning for tags
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self.is_log == False: This is 'patch' mode, where we already have
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all the tags, and are processing patches to remove junk we
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don't want, and add things we think are required.
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Args:
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line: text line to process
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Returns:
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list of output lines, or [] if nothing should be output
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"""
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# Initially we have no output. Prepare the input line string
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out = []
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line = line.rstrip('\n')
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commit_match = re_commit.match(line) if self.is_log else None
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if self.is_log:
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if line[:4] == ' ':
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line = line[4:]
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# Handle state transition and skipping blank lines
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series_tag_match = re_series_tag.match(line)
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commit_tag_match = re_commit_tag.match(line)
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cover_cc_match = re_cover_cc.match(line)
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signoff_match = re_signoff.match(line)
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tag_match = None
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if self.state == STATE_PATCH_HEADER:
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tag_match = re_tag.match(line)
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is_blank = not line.strip()
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if is_blank:
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if (self.state == STATE_MSG_HEADER
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or self.state == STATE_PATCH_SUBJECT):
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self.state += 1
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# We don't have a subject in the text stream of patch files
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# It has its own line with a Subject: tag
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if not self.is_log and self.state == STATE_PATCH_SUBJECT:
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self.state += 1
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elif commit_match:
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self.state = STATE_MSG_HEADER
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# If we are in a section, keep collecting lines until we see END
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if self.in_section:
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if line == 'END':
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if self.in_section == 'cover':
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self.series.cover = self.section
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elif self.in_section == 'notes':
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if self.is_log:
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self.series.notes += self.section
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elif self.in_section == 'commit-notes':
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if self.is_log:
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self.commit.notes += self.section
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else:
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self.warn.append("Unknown section '%s'" % self.in_section)
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self.in_section = None
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self.skip_blank = True
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self.section = []
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else:
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self.section.append(line)
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# Detect the commit subject
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elif not is_blank and self.state == STATE_PATCH_SUBJECT:
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self.commit.subject = line
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# Detect the tags we want to remove, and skip blank lines
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elif re_remove.match(line) and not commit_tag_match:
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self.skip_blank = True
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# TEST= should be the last thing in the commit, so remove
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# everything after it
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if line.startswith('TEST='):
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self.found_test = True
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elif self.skip_blank and is_blank:
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self.skip_blank = False
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# Detect the start of a cover letter section
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elif re_cover.match(line):
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self.in_section = 'cover'
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self.skip_blank = False
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elif cover_cc_match:
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value = cover_cc_match.group(1)
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self.AddToSeries(line, 'cover-cc', value)
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# If we are in a change list, key collected lines until a blank one
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elif self.in_change:
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if is_blank:
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# Blank line ends this change list
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self.in_change = 0
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elif line == '---':
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self.in_change = 0
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out = self.ProcessLine(line)
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else:
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if self.is_log:
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self.series.AddChange(self.in_change, self.commit, line)
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self.skip_blank = False
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# Detect Series-xxx tags
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elif series_tag_match:
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name = series_tag_match.group(1)
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value = series_tag_match.group(2)
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if name == 'changes':
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# value is the version number: e.g. 1, or 2
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try:
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value = int(value)
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except ValueError as str:
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raise ValueError("%s: Cannot decode version info '%s'" %
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(self.commit.hash, line))
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self.in_change = int(value)
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else:
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self.AddToSeries(line, name, value)
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self.skip_blank = True
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# Detect Commit-xxx tags
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elif commit_tag_match:
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name = commit_tag_match.group(1)
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value = commit_tag_match.group(2)
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if name == 'notes':
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self.AddToCommit(line, name, value)
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self.skip_blank = True
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# Detect the start of a new commit
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elif commit_match:
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self.CloseCommit()
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self.commit = commit.Commit(commit_match.group(1))
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# Detect tags in the commit message
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elif tag_match:
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# Remove Tested-by self, since few will take much notice
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if (tag_match.group(1) == 'Tested-by' and
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tag_match.group(2).find(os.getenv('USER') + '@') != -1):
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self.warn.append("Ignoring %s" % line)
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elif tag_match.group(1) == 'Patch-cc':
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self.commit.AddCc(tag_match.group(2).split(','))
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else:
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out = [line]
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# Suppress duplicate signoffs
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elif signoff_match:
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if (self.is_log or not self.commit or
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self.commit.CheckDuplicateSignoff(signoff_match.group(1))):
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out = [line]
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# Well that means this is an ordinary line
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else:
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pos = 1
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# Look for ugly ASCII characters
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for ch in line:
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# TODO: Would be nicer to report source filename and line
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if ord(ch) > 0x80:
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self.warn.append("Line %d/%d ('%s') has funny ascii char" %
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(self.linenum, pos, line))
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pos += 1
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# Look for space before tab
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m = re_space_before_tab.match(line)
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if m:
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self.warn.append('Line %d/%d has space before tab' %
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(self.linenum, m.start()))
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# OK, we have a valid non-blank line
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out = [line]
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self.linenum += 1
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self.skip_blank = False
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if self.state == STATE_DIFFS:
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pass
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# If this is the start of the diffs section, emit our tags and
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# change log
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elif line == '---':
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self.state = STATE_DIFFS
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# Output the tags (signeoff first), then change list
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out = []
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log = self.series.MakeChangeLog(self.commit)
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out += [line]
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if self.commit:
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out += self.commit.notes
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out += [''] + log
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elif self.found_test:
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if not re_allowed_after_test.match(line):
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self.lines_after_test += 1
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return out
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def Finalize(self):
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"""Close out processing of this patch stream"""
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self.CloseCommit()
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if self.lines_after_test:
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self.warn.append('Found %d lines after TEST=' %
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self.lines_after_test)
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def ProcessStream(self, infd, outfd):
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"""Copy a stream from infd to outfd, filtering out unwanting things.
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This is used to process patch files one at a time.
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Args:
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infd: Input stream file object
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outfd: Output stream file object
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"""
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# Extract the filename from each diff, for nice warnings
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fname = None
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last_fname = None
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re_fname = re.compile('diff --git a/(.*) b/.*')
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while True:
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line = infd.readline()
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if not line:
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break
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out = self.ProcessLine(line)
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# Try to detect blank lines at EOF
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for line in out:
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match = re_fname.match(line)
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if match:
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last_fname = fname
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fname = match.group(1)
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if line == '+':
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self.blank_count += 1
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else:
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if self.blank_count and (line == '-- ' or match):
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self.warn.append("Found possible blank line(s) at "
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"end of file '%s'" % last_fname)
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outfd.write('+\n' * self.blank_count)
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outfd.write(line + '\n')
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self.blank_count = 0
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self.Finalize()
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def GetMetaDataForList(commit_range, git_dir=None, count=None,
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series = None, allow_overwrite=False):
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"""Reads out patch series metadata from the commits
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This does a 'git log' on the relevant commits and pulls out the tags we
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are interested in.
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Args:
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commit_range: Range of commits to count (e.g. 'HEAD..base')
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git_dir: Path to git repositiory (None to use default)
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count: Number of commits to list, or None for no limit
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series: Series object to add information into. By default a new series
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is started.
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allow_overwrite: Allow tags to overwrite an existing tag
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Returns:
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A Series object containing information about the commits.
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"""
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if not series:
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series = Series()
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series.allow_overwrite = allow_overwrite
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params = gitutil.LogCmd(commit_range,reverse=True, count=count,
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git_dir=git_dir)
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stdout = command.RunPipe([params], capture=True).stdout
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ps = PatchStream(series, is_log=True)
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for line in stdout.splitlines():
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ps.ProcessLine(line)
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ps.Finalize()
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return series
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def GetMetaData(start, count):
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"""Reads out patch series metadata from the commits
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This does a 'git log' on the relevant commits and pulls out the tags we
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are interested in.
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Args:
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start: Commit to start from: 0=HEAD, 1=next one, etc.
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count: Number of commits to list
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"""
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return GetMetaDataForList('HEAD~%d' % start, None, count)
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def FixPatch(backup_dir, fname, series, commit):
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"""Fix up a patch file, by adding/removing as required.
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We remove our tags from the patch file, insert changes lists, etc.
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The patch file is processed in place, and overwritten.
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A backup file is put into backup_dir (if not None).
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Args:
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fname: Filename to patch file to process
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series: Series information about this patch set
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commit: Commit object for this patch file
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Return:
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A list of errors, or [] if all ok.
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"""
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handle, tmpname = tempfile.mkstemp()
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outfd = os.fdopen(handle, 'w')
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infd = open(fname, 'r')
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ps = PatchStream(series)
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ps.commit = commit
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ps.ProcessStream(infd, outfd)
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infd.close()
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outfd.close()
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# Create a backup file if required
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if backup_dir:
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shutil.copy(fname, os.path.join(backup_dir, os.path.basename(fname)))
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shutil.move(tmpname, fname)
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return ps.warn
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def FixPatches(series, fnames):
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"""Fix up a list of patches identified by filenames
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The patch files are processed in place, and overwritten.
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Args:
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series: The series object
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fnames: List of patch files to process
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"""
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# Current workflow creates patches, so we shouldn't need a backup
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backup_dir = None #tempfile.mkdtemp('clean-patch')
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count = 0
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for fname in fnames:
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commit = series.commits[count]
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commit.patch = fname
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result = FixPatch(backup_dir, fname, series, commit)
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if result:
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print '%d warnings for %s:' % (len(result), fname)
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for warn in result:
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print '\t', warn
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print
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count += 1
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print 'Cleaned %d patches' % count
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return series
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def InsertCoverLetter(fname, series, count):
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"""Inserts a cover letter with the required info into patch 0
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Args:
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fname: Input / output filename of the cover letter file
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series: Series object
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count: Number of patches in the series
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"""
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fd = open(fname, 'r')
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lines = fd.readlines()
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fd.close()
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fd = open(fname, 'w')
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text = series.cover
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prefix = series.GetPatchPrefix()
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for line in lines:
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if line.startswith('Subject:'):
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# TODO: if more than 10 patches this should save 00/xx, not 0/xx
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line = 'Subject: [%s 0/%d] %s\n' % (prefix, count, text[0])
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# Insert our cover letter
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elif line.startswith('*** BLURB HERE ***'):
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# First the blurb test
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line = '\n'.join(text[1:]) + '\n'
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if series.get('notes'):
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line += '\n'.join(series.notes) + '\n'
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# Now the change list
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out = series.MakeChangeLog(None)
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line += '\n' + '\n'.join(out)
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fd.write(line)
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fd.close()
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