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4d0ba818 KH |
1 | # -*- coding: utf-8 -*- |
2 | ||
3 | __copyright__ = """ | |
4 | Copyright (C) 2006, Karl Hasselström <kha@treskal.com> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License version 2 as | |
8 | published by the Free Software Foundation. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | """ | |
19 | ||
20 | import sys, os | |
21 | from optparse import OptionParser, make_option | |
22 | ||
23 | from stgit.commands.common import * | |
24 | from stgit.utils import * | |
5e888f30 | 25 | from stgit.out import * |
ca216016 | 26 | from stgit.run import * |
4d0ba818 KH |
27 | from stgit import stack, git |
28 | ||
8d2b87ac | 29 | help = 'Fix StGit metadata if branch was modified with git commands' |
4d0ba818 KH |
30 | usage = """%prog [options] |
31 | ||
8d2b87ac KH |
32 | If you modify an StGit stack (branch) with some git commands -- such |
33 | as commit, pull, merge, and rebase -- you will leave the StGit | |
34 | metadata in an inconsistent state. In that situation, you have two | |
35 | options: | |
36 | ||
37 | 1. Use "git reset" or similar to undo the effect of the git | |
38 | command(s). | |
39 | ||
40 | 2. Use "stg repair". This will fix up the StGit metadata to | |
41 | accomodate the modifications to the branch. Specifically, it will | |
42 | do the following: | |
43 | ||
44 | * If you have made regular git commits on top of your stack of | |
45 | StGit patches, "stg repair" makes new StGit patches out of | |
46 | them, preserving their contents. | |
47 | ||
48 | * However, merge commits cannot become patches; if you have | |
49 | committed a merge on top of your stack, "repair" will simply | |
50 | mark all patches below the merge unapplied, since they are no | |
51 | longer reachable. If this is not what you want, use "git | |
52 | reset" to get rid of the merge and run "stg repair" again. | |
53 | ||
54 | * The applied patches are supposed to be precisely those that | |
55 | are reachable from the branch head. If you have used e.g. | |
56 | "git reset" to move the head, some applied patches may no | |
57 | longer be reachable, and some unapplied patches may have | |
58 | become reachable. "stg repair" will correct the appliedness | |
59 | of such patches. | |
60 | ||
61 | "stg repair" will fix these inconsistencies reliably, so as long | |
62 | as you like what it does, you have no reason to avoid causing | |
63 | them in the first place. For example, you might find it | |
64 | convenient to make commits with a graphical tool and then have | |
65 | "stg repair" make proper patches of the commits. | |
66 | ||
67 | NOTE: If using git commands on the stack was a mistake, running "stg | |
68 | repair" is _not_ what you want. In that case, what you want is option | |
69 | (1) above.""" | |
4d0ba818 | 70 | |
7b601c9e | 71 | directory = DirectoryGotoToplevel() |
4d0ba818 KH |
72 | options = [] |
73 | ||
ca216016 KH |
74 | class Commit(object): |
75 | def __init__(self, id): | |
76 | self.id = id | |
77 | self.parents = set() | |
78 | self.children = set() | |
79 | self.patch = None | |
80 | self.__commit = None | |
81 | def __get_commit(self): | |
82 | if not self.__commit: | |
83 | self.__commit = git.get_commit(self.id) | |
84 | return self.__commit | |
85 | commit = property(__get_commit) | |
86 | def __str__(self): | |
87 | if self.patch: | |
88 | return '%s (%s)' % (self.id, self.patch) | |
89 | else: | |
90 | return self.id | |
91 | def __repr__(self): | |
92 | return '<%s>' % str(self) | |
93 | ||
94 | def read_commit_dag(branch): | |
95 | out.start('Reading commit DAG') | |
96 | commits = {} | |
97 | patches = set() | |
1576d681 | 98 | for line in Run('git', 'rev-list', '--parents', '--all').output_lines(): |
ca216016 KH |
99 | cs = line.split() |
100 | for id in cs: | |
101 | if not id in commits: | |
102 | commits[id] = Commit(id) | |
103 | for id in cs[1:]: | |
104 | commits[cs[0]].parents.add(commits[id]) | |
105 | commits[id].children.add(commits[cs[0]]) | |
1576d681 | 106 | for line in Run('git', 'show-ref').output_lines(): |
ca216016 KH |
107 | id, ref = line.split() |
108 | m = re.match(r'^refs/patches/%s/(.+)$' % branch, ref) | |
2b049e12 | 109 | if m and not m.group(1).endswith('.log'): |
ca216016 KH |
110 | c = commits[id] |
111 | c.patch = m.group(1) | |
112 | patches.add(c) | |
113 | out.done() | |
114 | return commits, patches | |
115 | ||
4d0ba818 | 116 | def func(parser, options, args): |
051090dd | 117 | """Repair inconsistencies in StGit metadata.""" |
4d0ba818 | 118 | |
ca216016 KH |
119 | orig_applied = crt_series.get_applied() |
120 | orig_unapplied = crt_series.get_unapplied() | |
4d0ba818 | 121 | |
4d0ba818 KH |
122 | if crt_series.get_protected(): |
123 | raise CmdException( | |
ca216016 KH |
124 | 'This branch is protected. Modification is not permitted.') |
125 | ||
051090dd | 126 | # Find commits that aren't patches, and applied patches. |
490add07 | 127 | head = git.get_commit(git.get_head()).get_id_hash() |
ca216016 KH |
128 | commits, patches = read_commit_dag(crt_series.get_name()) |
129 | c = commits[head] | |
490add07 KH |
130 | patchify = [] # commits to definitely patchify |
131 | maybe_patchify = [] # commits to patchify if we find a patch below them | |
ca216016 KH |
132 | applied = [] |
133 | while len(c.parents) == 1: | |
134 | parent, = c.parents | |
135 | if c.patch: | |
136 | applied.append(c) | |
490add07 KH |
137 | patchify.extend(maybe_patchify) |
138 | maybe_patchify = [] | |
139 | else: | |
140 | maybe_patchify.append(c) | |
ca216016 KH |
141 | c = parent |
142 | applied.reverse() | |
143 | patchify.reverse() | |
144 | ||
145 | # Find patches hidden behind a merge. | |
146 | merge = c | |
147 | todo = set([c]) | |
148 | seen = set() | |
149 | hidden = set() | |
150 | while todo: | |
151 | c = todo.pop() | |
152 | seen.add(c) | |
153 | todo |= c.parents - seen | |
154 | if c.patch: | |
155 | hidden.add(c) | |
156 | if hidden: | |
157 | out.warn(('%d patch%s are hidden below the merge commit' | |
158 | % (len(hidden), ['es', ''][len(hidden) == 1])), | |
159 | '%s,' % merge.id, 'and will be considered unapplied.') | |
160 | ||
051090dd | 161 | # Make patches of any linear sequence of commits on top of a patch. |
ca216016 | 162 | names = set(p.patch for p in patches) |
4d0ba818 | 163 | def name_taken(name): |
ca216016 KH |
164 | return name in names |
165 | if applied and patchify: | |
166 | out.start('Creating %d new patch%s' | |
167 | % (len(patchify), ['es', ''][len(patchify) == 1])) | |
168 | for p in patchify: | |
169 | name = make_patch_name(p.commit.get_log(), name_taken) | |
170 | out.info('Creating patch %s from commit %s' % (name, p.id)) | |
171 | aname, amail, adate = name_email_date(p.commit.get_author()) | |
172 | cname, cmail, cdate = name_email_date(p.commit.get_committer()) | |
173 | parent, = p.parents | |
174 | crt_series.new_patch( | |
175 | name, can_edit = False, commit = False, | |
176 | top = p.id, bottom = parent.id, message = p.commit.get_log(), | |
177 | author_name = aname, author_email = amail, author_date = adate, | |
178 | committer_name = cname, committer_email = cmail) | |
179 | p.patch = name | |
180 | applied.append(p) | |
181 | names.add(name) | |
182 | out.done() | |
183 | ||
184 | # Write the applied/unapplied files. | |
185 | out.start('Checking patch appliedness') | |
2b049e12 | 186 | unapplied = patches - set(applied) |
ca216016 | 187 | applied_name_set = set(p.patch for p in applied) |
2b049e12 KH |
188 | unapplied_name_set = set(p.patch for p in unapplied) |
189 | patches_name_set = set(p.patch for p in patches) | |
190 | orig_patches = orig_applied + orig_unapplied | |
191 | orig_applied_name_set = set(orig_applied) | |
192 | orig_unapplied_name_set = set(orig_unapplied) | |
193 | orig_patches_name_set = set(orig_patches) | |
194 | for name in orig_patches_name_set - patches_name_set: | |
195 | out.info('%s is gone' % name) | |
196 | for name in applied_name_set - orig_applied_name_set: | |
197 | out.info('%s is now applied' % name) | |
198 | for name in unapplied_name_set - orig_unapplied_name_set: | |
199 | out.info('%s is now unapplied' % name) | |
200 | orig_order = dict(zip(orig_patches, xrange(len(orig_patches)))) | |
201 | def patchname_cmp(p1, p2): | |
202 | i1 = orig_order.get(p1, len(orig_order)) | |
203 | i2 = orig_order.get(p2, len(orig_order)) | |
204 | return cmp((i1, p1), (i2, p2)) | |
ca216016 | 205 | crt_series.set_applied(p.patch for p in applied) |
2b049e12 | 206 | crt_series.set_unapplied(sorted(unapplied_name_set, cmp = patchname_cmp)) |
ca216016 | 207 | out.done() |