util: Remove support for hg patches in patch creation script

Simplify the patch creation helper script by removing support for
automatic conversion to Mercurial's patch format. We no longer use
Mercurial as a primary repository, so this support is not likely to be
needed again.

Change-Id: I83f6efb9ccaee9c548b33257a4d6128153750c76
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/5162
Reviewed-by: Gabe Black <gabeblack@google.com>

2 files changed, 2 insertions, 167 deletions

diff --git a/util/maint/create_patches.sh b/util/maint/create_patches.sh
index 7c1655f78..339136ac0 100755
--- a/util/maint/create_patches.sh
+++ b/util/maint/create_patches.sh
@@ -44,11 +44,9 @@ REL_SCRIPT_DIR=`dirname "$0"`
 SCRIPT_NAME=`basename "$0"`
 SCRIPT_DIR=$(cd "$REL_SCRIPT_DIR" && echo "$(pwd -P)")
 MSG_FILTER="$SCRIPT_DIR"/upstream_msg_filter.sed
-CONV_HG="$SCRIPT_DIR"/git-patch-to-hg-patch
 
 PATCH_DIR="./patches/"
 UPSTREAM="upstream/master"
-PATCH_FORMAT=
 
 usage()
 {
@@ -59,7 +57,6 @@ Format a patch series suitable for upstream consumption.
 Options:
   -u BRANCH      Upstream branch
   -d DIR         Patch directory
-  -f FMT         Patch format (hg or git)
   -h             Show this help string.
 
 This script creates a series of patches suitable from upstream
@@ -70,7 +67,7 @@ the following operations in order:
   1. Rebase the patches in the current branch onto the upstream
      branch.
   2. Filter commit messages.
-  3. Generate a set of patches in git format or Mercurial format.
+  3. Generate a set of patches in git format.
 EOF
 }
 
@@ -79,7 +76,7 @@ branch_exists()
     git rev-parse --verify -q "$1" > /dev/null
 }
 
-while getopts ":u:d:f:h" OPT; do
+while getopts ":u:d:h" OPT; do
     case $OPT in
         d)
             PATCH_DIR="$OPTARG"
@@ -87,9 +84,6 @@ while getopts ":u:d:f:h" OPT; do
         u)
             UPSTREAM="$OPTARG"
             ;;
-        f)
-            PATCH_FORMAT="$OPTARG"
-            ;;
         h)
             usage
             exit 0
@@ -117,21 +111,6 @@ shift $((OPTIND - 1))
 
 BRANCH="${1:-HEAD}"
 
-case "$PATCH_FORMAT" in
-    git|hg)
-        ;;
-
-    "")
-        echo "Error: No patch format specified" >&2
-        exit 1
-        ;;
-
-    *)
-        echo "Error: Illegal patch format specified: '$PATCH_FORMAT'" >&2
-        exit 1
-esac
-
-
 if ! branch_exists "$BRANCH"; then
     echo "Error: Patch branch '$BRANCH' doesn't exist" 1>&2
     exit 2
@@ -168,10 +147,3 @@ git filter-branch -f \
 
 echo "Creating patches..."
 git format-patch -p -o "$PATCH_DIR" "$UPSTREAM"
-
-if [ "$PATCH_FORMAT" == "hg" ]; then
-    echo "Converting patches..."
-    for P in "$PATCH_DIR"/*.patch; do
-        "$CONV_HG" $P
-    done
-fi
diff --git a/util/maint/git-patch-to-hg-patch b/util/maint/git-patch-to-hg-patch
deleted file mode 100755
index 1b9e05d09..000000000
--- a/util/maint/git-patch-to-hg-patch
+++ /dev/null
@@ -1,137 +0,0 @@
-#!/usr/bin/env python2
-#
-# This file originated from the moz-git-tools repo on GitHub
-# (https://github.com/mozilla/moz-git-tools), which contains the
-# following LICENSE notice:
-#
-# <quote>
-# Except for git-new-workdir, which is covered under GPLv2, the code
-# in this repository is placed into the public domain via CC0.
-#
-# http://creativecommons.org/publicdomain/zero/1.0/legalcode
-# </quote>
-
-r"""Git format-patch to hg importable patch.
-
-(Who knew this was so complicated?)
-
->>> process(StringIO('From 3ce1ccc06 Mon Sep 17 00:00:00 2001\nFrom: fromuser\nSubject: subject\n\nRest of patch.\nMore patch.\n'))
-'# HG changeset patch\n# User fromuser\n\nsubject\n\nRest of patch.\nMore patch.\n'
-
->>> process(StringIO('From: fromuser\nSubject: A very long subject line.  Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi faucibus, arcu sit amet\n\nRest of patch.\nMore patch.\n'))
-'# HG changeset patch\n# User fromuser\n\nA very long subject line.  Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi faucibus, arcu sit amet\n\nRest of patch.\nMore patch.\n'
-
->>> process(StringIO('From: f\nSubject: =?UTF-8?q?Bug=20655877=20-=20Dont=20treat=20SVG=20text=20frames=20?= =?UTF-8?q?as=20being=20positioned.=20r=3D=3F?=\n\nPatch.'))
-'# HG changeset patch\n# User f\n\nBug 655877 - Dont treat SVG text frames as being positioned. r=?\n\nPatch.'
-"""
-
-# Original author: bholley
-
-import sys
-import re
-import fileinput
-import email, email.parser, email.header, email.utils
-import math
-from cStringIO import StringIO
-from itertools import takewhile
-
-def decode_header(hdr_string):
-  r"""Clean up weird encoding crap.
-
-  >>> clean_header('[PATCH] =?UTF-8?q?Bug=20655877=20r=3D=3F?=')
-  '[PATCH] Bug 655877 r=?'
-  """
-  rv = []
-  hdr = email.header.Header(hdr_string, maxlinelen=float('inf'))
-  for (part, encoding) in email.header.decode_header(hdr):
-    if encoding is None:
-      rv.append(part)
-    else:
-      rv.append(part.decode(encoding).encode('utf-8'))
-  return ' '.join(rv)
-
-def clean_header(hdr_string):
-  r"""Transform a header split over many lines into a header split only where
-  linebreaks are intended.  This is important because hg cares about the first
-  line of the commit message.
-
-  Also clean up weird encoding crap.
-
-  >>> clean_header('Foo\n bar\n baz')
-  'Foo bar baz'
-  >>> clean_header('Foo\n bar\nSpam\nEggs')
-  'Foo bar\nSpam\nEggs'
-  """
-
-  lines = []
-  curline = ''
-  for line in decode_header(hdr_string).split('\n'):
-    if not line.startswith(' '):
-      lines.append(curline)
-      curline = ''
-    curline += line
-  lines.append(curline)
-  return '\n'.join(lines[1:])
-
-def process(git_patch_file):
-  parser = email.parser.Parser()
-  msg = parser.parse(git_patch_file)
-  from_hdr = clean_header(msg['From'])
-  commit_title = clean_header(msg['subject'])
-  if not len(commit_title) or not len(from_hdr):
-    sys.stderr.write("%s does not look like a valid git patch file, skipping\n"
-                     % git_patch_file.name)
-    return
-
-  parsed_from = email.utils.parseaddr(from_hdr)
-  nuke_prefix = r"\[PATCH( \d+/\d+)?\] "
-  match = re.match(nuke_prefix, commit_title)
-  if match:
-    commit_title = commit_title[match.end():]
-
-  patch_body = msg.get_payload()
-
-  # git format-patch wraps the diff (including trailing whitespace):
-  #   ---
-  #   <diff>
-  #   --
-  #   2.0.3
-  # This doesn't hurt parsing the diff at all, but the version number is
-  # nonsense once the git specific items have been stripped
-  patch_body = re.sub(r'--\s?\n[0-9\.]+\n$', '', patch_body)
-
-  return '\n'.join(['# HG changeset patch',
-                    '# User %s <%s>' % parsed_from,
-                    '',
-                    commit_title,
-                    '',
-                    patch_body])
-
-if __name__ == "__main__":
-  if len(sys.argv) > 1 and sys.argv[1] == '--test':
-    import doctest
-    doctest.testmod()
-    sys.exit(0)
-
-  # If there were no arguments, do stdin->stdout.
-  filelist = sys.argv[1:]
-  if not filelist:
-    lines = process(sys.stdin)
-    sys.stdout.writelines(lines)
-    sys.exit(0)
-
-  # Otherwise, we take a list of files.
-  for filename in filelist:
-
-    # Read the lines.
-    f = open(filename, 'r')
-    lines = process(f)
-    f.close()
-
-    # Process.
-
-    if lines:
-      # Write them back to the same file.
-      f = open(filename, 'w')
-      f.writelines(lines)
-      f.close()