3 # Copyright (C) 2009 The Android Open Source Project
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
18 Usage: merge-event-log-tags.py [-o output_file] [input_files...]
20 Merge together zero or more event-logs-tags files to produce a single
21 output file, stripped of comments. Checks that no tag numbers conflict
24 -h to display this usage message and exit.
39 pre_merged_file = None
41 # Tags with a tag number of ? are assigned a tag in the range
42 # [ASSIGN_START, ASSIGN_LIMIT).
44 ASSIGN_LIMIT = 1000000
47 opts, args = getopt.getopt(sys.argv[1:], "ho:m:")
48 except getopt.GetoptError, err:
62 print >> sys.stderr, "unhandled option %s" % (o,)
65 # Restrictions on tags:
67 # Tag names must be unique. (If the tag number and description are
68 # also the same, a warning is issued instead of an error.)
70 # Explicit tag numbers must be unique. (If the tag name is also the
71 # same, no error is issued because the above rule will issue a
79 for t in event_log_tags.TagFile(pre_merged_file).tags:
80 pre_merged_tags[t.tagname] = t
83 tagfile = event_log_tags.TagFile(fn)
85 for t in tagfile.tags:
88 description = t.description
90 if t.tagname in by_tagname:
91 orig = by_tagname[t.tagname]
93 # Allow an explicit tag number to define an implicit tag number
94 if orig.tagnum is None:
95 orig.tagnum = t.tagnum
96 elif t.tagnum is None:
97 t.tagnum = orig.tagnum
99 if (t.tagnum == orig.tagnum and
100 t.description == orig.description):
101 # if the name and description are identical, issue a warning
102 # instead of failing (to make it easier to move tags between
103 # projects without breaking the build).
104 tagfile.AddWarning("tag \"%s\" (%s) duplicated in %s:%d" %
105 (t.tagname, t.tagnum, orig.filename, orig.linenum),
109 "tag name \"%s\" used by conflicting tag %s from %s:%d" %
110 (t.tagname, orig.tagnum, orig.filename, orig.linenum),
114 if t.tagnum is not None and t.tagnum in by_tagnum:
115 orig = by_tagnum[t.tagnum]
117 if t.tagname != orig.tagname:
119 "tag number %d used by conflicting tag \"%s\" from %s:%d" %
120 (t.tagnum, orig.tagname, orig.filename, orig.linenum),
124 by_tagname[t.tagname] = t
125 if t.tagnum is not None:
126 by_tagnum[t.tagnum] = t
128 errors.extend(tagfile.errors)
129 warnings.extend(tagfile.warnings)
132 for fn, ln, msg in errors:
133 print >> sys.stderr, "%s:%d: error: %s" % (fn, ln, msg)
137 for fn, ln, msg in warnings:
138 print >> sys.stderr, "%s:%d: warning: %s" % (fn, ln, msg)
140 # Python's hash function (a) isn't great and (b) varies between
141 # versions of python. Using md5 is overkill here but is the same from
142 # platform to platform and speed shouldn't matter in practice.
144 d = md5.md5(str).digest()[:4]
145 return struct.unpack("!I", d)[0]
147 # Assign a tag number to all the entries that say they want one
148 # assigned. We do this based on a hash of the tag name so that the
149 # numbers should stay relatively stable as tags are added.
151 # If we were provided pre-merged tags (w/ the -m option), then don't
152 # ever try to allocate one, just fail if we don't have a number
154 for name, t in sorted(by_tagname.iteritems()):
158 t.tagnum = pre_merged_tags[t.tagname]
160 print >> sys.stderr, ("Error: Tag number not defined for tag `%s'."
161 +" Have you done a full build?") % t.tagname
165 x = (hashname(name) % (ASSIGN_LIMIT - ASSIGN_START - 1)) + ASSIGN_START
166 if x not in by_tagnum:
172 # by_tagnum should be complete now; we've assigned numbers to all tags.
174 buffer = cStringIO.StringIO()
175 for n, t in sorted(by_tagnum.iteritems()):
177 buffer.write("%d %s %s\n" % (t.tagnum, t.tagname, t.description))
179 buffer.write("%d %s\n" % (t.tagnum, t.tagname))
181 event_log_tags.WriteOutput(output_file, buffer)