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1 1 Ancestor
2 2 Any changeset that can be reached by an unbroken chain of parent
3 3 changesets from a given changeset. More precisely, the ancestors
4 4 of a changeset can be defined by two properties: a parent of a
5 5 changeset is an ancestor, and a parent of an ancestor is an
6 6 ancestor. See also: 'Descendant'.
7 7
8 8 Branch
9 9 (Noun) A child changeset that has been created from a parent that
10 10 is not a head. These are known as topological branches, see
11 11 'Branch, topological'. If a topological branch is named, it becomes
12 12 a named branch. If a topological branch is not named, it becomes
13 13 an anonymous branch. See 'Branch, anonymous' and 'Branch, named'.
14 14
15 15 Branches may be created when changes are pulled from or pushed to
16 16 a remote repository, since new heads may be created by these
17 17 operations. Note that the term branch can also be used informally
18 18 to describe a development process in which certain development is
19 19 done independently of other development. This is sometimes done
20 20 explicitly with a named branch, but it can also be done locally,
21 21 using bookmarks or clones and anonymous branches.
22 22
23 23 Example: "The experimental branch".
24 24
25 25 (Verb) The action of creating a child changeset which results in
26 26 its parent having more than one child.
27 27
28 28 Example: "I'm going to branch at X".
29 29
30 30 Branch, anonymous
31 31 Every time a new child changeset is created from a parent that is not
32 32 a head and the name of the branch is not changed, a new anonymous
33 33 branch is created.
34 34
35 35 Branch, closed
36 36 A named branch whose branch heads have all been closed.
37 37
38 38 Branch, default
39 39 The branch assigned to a changeset when no name has previously been
40 40 assigned.
41 41
42 42 Branch head
43 43 See 'Head, branch'.
44 44
45 45 Branch, inactive
46 46 If a named branch has no topological heads, it is considered to be
47 47 inactive. As an example, a feature branch becomes inactive when it
48 48 is merged into the default branch. The :hg:`branches` command
49 49 shows inactive branches by default, though they can be hidden with
50 50 :hg:`branches --active`.
51 51
52 52 NOTE: this concept is deprecated because it is too implicit.
53 Branches show now be explicitly closed using :hg:`commit
53 Branches should now be explicitly closed using :hg:`commit
54 54 --close-branch` when they are no longer needed.
55 55
56 56 Branch, named
57 57 A collection of changesets which have the same branch name. By
58 58 default, children of a changeset in a named branch belong to the
59 59 same named branch. A child can be explicitly assigned to a
60 60 different branch. See :hg:`help branch`, :hg:`help branches` and
61 61 :hg:`commit --close-branch` for more information on managing
62 62 branches.
63 63
64 64 Named branches can be thought of as a kind of namespace, dividing
65 65 the collection of changesets that comprise the repository into a
66 66 collection of disjoint subsets. A named branch is not necessarily
67 67 a topological branch. If a new named branch is created from the
68 68 head of another named branch, or the default branch, but no
69 69 further changesets are added to that previous branch, then that
70 70 previous branch will be a branch in name only.
71 71
72 72 Branch tip
73 73 See 'Tip, branch'.
74 74
75 75 Branch, topological
76 76 Every time a new child changeset is created from a parent that is
77 77 not a head, a new topological branch is created. If a topological
78 78 branch is named, it becomes a named branch. If a topological
79 79 branch is not named, it becomes an anonymous branch of the
80 80 current, possibly default, branch.
81 81
82 82 Changelog
83 83 A record of the changesets in the order in which they were added
84 84 to the repository. This includes details such as changeset id,
85 85 author, commit message, date, and list of changed files.
86 86
87 87 Changeset
88 88 A snapshot of the state of the repository used to record a change.
89 89
90 90 Changeset, child
91 91 The converse of parent changeset: if P is a parent of C, then C is
92 92 a child of P. There is no limit to the number of children that a
93 93 changeset may have.
94 94
95 95 Changeset id
96 96 A SHA-1 hash that uniquely identifies a changeset. It may be
97 97 represented as either a "long" 40 hexadecimal digit string, or a
98 98 "short" 12 hexadecimal digit string.
99 99
100 100 Changeset, merge
101 101 A changeset with two parents. This occurs when a merge is
102 102 committed.
103 103
104 104 Changeset, parent
105 105 A revision upon which a child changeset is based. Specifically, a
106 106 parent changeset of a changeset C is a changeset whose node
107 107 immediately precedes C in the DAG. Changesets have at most two
108 108 parents.
109 109
110 110 Checkout
111 111 (Noun) The working directory being updated to a specific
112 112 revision. This use should probably be avoided where possible, as
113 113 changeset is much more appropriate than checkout in this context.
114 114
115 115 Example: "I'm using checkout X."
116 116
117 117 (Verb) Updating the working directory to a specific changeset. See
118 118 :hg:`help update`.
119 119
120 120 Example: "I'm going to check out changeset X."
121 121
122 122 Child changeset
123 123 See 'Changeset, child'.
124 124
125 125 Close changeset
126 126 See 'Changeset, close'.
127 127
128 128 Closed branch
129 129 See 'Branch, closed'.
130 130
131 131 Clone
132 132 (Noun) An entire or partial copy of a repository. The partial
133 133 clone must be in the form of a revision and its ancestors.
134 134
135 135 Example: "Is your clone up to date?".
136 136
137 137 (Verb) The process of creating a clone, using :hg:`clone`.
138 138
139 139 Example: "I'm going to clone the repository".
140 140
141 141 Closed branch head
142 142 See 'Head, closed branch'.
143 143
144 144 Commit
145 145 (Noun) A synonym for changeset.
146 146
147 147 Example: "Is the bug fixed in your recent commit?"
148 148
149 149 (Verb) The act of recording changes to a repository. When files
150 150 are committed in a working directory, Mercurial finds the
151 151 differences between the committed files and their parent
152 152 changeset, creating a new changeset in the repository.
153 153
154 154 Example: "You should commit those changes now."
155 155
156 156 Cset
157 157 A common abbreviation of the term changeset.
158 158
159 159 DAG
160 160 The repository of changesets of a distributed version control
161 161 system (DVCS) can be described as a directed acyclic graph (DAG),
162 162 consisting of nodes and edges, where nodes correspond to
163 163 changesets and edges imply a parent -> child relation. This graph
164 164 can be visualized by graphical tools such as :hg:`glog`
165 165 (graphlog). In Mercurial, the DAG is limited by the requirement
166 166 for children to have at most two parents.
167 167
168 168 Default branch
169 169 See 'Branch, default'.
170 170
171 171 Descendant
172 172 Any changeset that can be reached by a chain of child changesets
173 173 from a given changeset. More precisely, the descendants of a
174 174 changeset can be defined by two properties: the child of a
175 175 changeset is a descendant, and the child of a descendant is a
176 176 descendant. See also: 'Ancestor'.
177 177
178 178 Diff
179 179 (Noun) The difference between the contents and attributes of files
180 180 in two changesets or a changeset and the current working
181 181 directory. The difference is usually represented in a standard
182 182 form called a "diff" or "patch". The "git diff" format is used
183 183 when the changes include copies, renames, or changes to file
184 184 attributes, none of which can be represented/handled by classic
185 185 "diff" and "patch".
186 186
187 187 Example: "Did you see my correction in the diff?"
188 188
189 189 (Verb) Diffing two changesets is the action of creating a diff or
190 190 patch.
191 191
192 192 Example: "If you diff with changeset X, you will see what I mean."
193 193
194 194 Directory, working
195 195 The working directory represents the state of the files tracked by
196 196 Mercurial, that will be recorded in the next commit. The working
197 197 directory initially corresponds to the snapshot at an existing
198 198 changeset, known as the parent of the working directory. See
199 199 'Parent, working directory'. The state may be modified by changes
200 200 to the files introduced manually or by a merge. The repository
201 201 metadata exists in the .hg directory inside the working directory.
202 202
203 203 Graph
204 204 See DAG and :hg:`help graphlog`.
205 205
206 206 Head
207 207 The term 'head' may be used to refer to both a branch head or a
208 208 repository head, depending on the context. See 'Head, branch' and
209 209 'Head, repository' for specific definitions.
210 210
211 211 Heads are where development generally takes place and are the
212 212 usual targets for update and merge operations.
213 213
214 214 Head, branch
215 215 A changeset with no descendants on the same named branch.
216 216
217 217 Head, closed branch
218 218 A changeset that marks a head as no longer interesting. The closed
219 219 head is no longer listed by :hg:`heads`. A branch is considered
220 220 closed when all its heads are closed and consequently is not
221 221 listed by :hg:`branches`.
222 222
223 223 Head, repository
224 224 A topological head which has not been closed.
225 225
226 226 Head, topological
227 227 A changeset with no children in the repository.
228 228
229 229 History, immutable
230 230 Once committed, changesets cannot be altered. Extensions which
231 231 appear to change history actually create new changesets that
232 232 replace existing ones, and then destroy the old changesets. Doing
233 233 so in public repositories can result in old changesets being
234 234 reintroduced to the repository.
235 235
236 236 History, rewriting
237 237 The changesets in a repository are immutable. However, extensions
238 238 to Mercurial can be used to alter the repository, usually in such
239 239 a way as to preserve changeset contents.
240 240
241 241 Immutable history
242 242 See 'History, immutable'.
243 243
244 244 Merge changeset
245 245 See 'Changeset, merge'.
246 246
247 247 Manifest
248 248 Each changeset has a manifest, which is the list of files that are
249 249 tracked by the changeset.
250 250
251 251 Merge
252 252 Used to bring together divergent branches of work. When you update
253 253 to a changeset and then merge another changeset, you bring the
254 254 history of the latter changeset into your working directory. Once
255 255 conflicts are resolved (and marked), this merge may be committed
256 256 as a merge changeset, bringing two branches together in the DAG.
257 257
258 258 Named branch
259 259 See 'Branch, named'.
260 260
261 261 Null changeset
262 262 The empty changeset. It is the parent state of newly-initialized
263 263 repositories and repositories with no checked out revision. It is
264 264 thus the parent of root changesets and the effective ancestor when
265 265 merging unrelated changesets. Can be specified by the alias 'null'
266 266 or by the changeset ID '000000000000'.
267 267
268 268 Parent
269 269 See 'Changeset, parent'.
270 270
271 271 Parent changeset
272 272 See 'Changeset, parent'.
273 273
274 274 Parent, working directory
275 275 The working directory parent reflects a virtual revision which is
276 276 the child of the changeset (or two changesets with an uncommitted
277 277 merge) shown by :hg:`parents`. This is changed with
278 278 :hg:`update`. Other commands to see the working directory parent
279 279 are :hg:`summary` and :hg:`id`. Can be specified by the alias ".".
280 280
281 281 Patch
282 282 (Noun) The product of a diff operation.
283 283
284 284 Example: "I've sent you my patch."
285 285
286 286 (Verb) The process of using a patch file to transform one
287 287 changeset into another.
288 288
289 289 Example: "You will need to patch that revision."
290 290
291 291 Pull
292 292 An operation in which changesets in a remote repository which are
293 293 not in the local repository are brought into the local
294 294 repository. Note that this operation without special arguments
295 295 only updates the repository, it does not update the files in the
296 296 working directory. See :hg:`help pull`.
297 297
298 298 Push
299 299 An operation in which changesets in a local repository which are
300 300 not in a remote repository are sent to the remote repository. Note
301 301 that this operation only adds changesets which have been committed
302 302 locally to the remote repository. Uncommitted changes are not
303 303 sent. See :hg:`help push`.
304 304
305 305 Repository
306 306 The metadata describing all recorded states of a collection of
307 307 files. Each recorded state is represented by a changeset. A
308 308 repository is usually (but not always) found in the ``.hg``
309 309 subdirectory of a working directory. Any recorded state can be
310 310 recreated by "updating" a working directory to a specific
311 311 changeset.
312 312
313 313 Repository head
314 314 See 'Head, repository'.
315 315
316 316 Revision
317 317 A state of the repository at some point in time. Earlier revisions
318 318 can be updated to by using :hg:`update`. See also 'Revision
319 319 number'; See also 'Changeset'.
320 320
321 321 Revision number
322 322 This integer uniquely identifies a changeset in a specific
323 323 repository. It represents the order in which changesets were added
324 324 to a repository, starting with revision number 0. Note that the
325 325 revision number may be different in each clone of a repository. To
326 326 identify changesets uniquely between different clones, see
327 327 'Changeset id'.
328 328
329 329 Revlog
330 330 History storage mechanism used by Mercurial. It is a form of delta
331 331 encoding, with occasional full revision of data followed by delta
332 332 of each successive revision. It includes data and an index
333 333 pointing to the data.
334 334
335 335 Rewriting history
336 336 See 'History, rewriting'.
337 337
338 338 Root
339 339 A changeset that has only the null changeset as its parent. Most
340 340 repositories have only a single root changeset.
341 341
342 342 Tip
343 343 The changeset with the highest revision number. It is the changeset
344 344 most recently added in a repository.
345 345
346 346 Tip, branch
347 347 The head of a given branch with the highest revision number. When
348 348 a branch name is used as a revision identifier, it refers to the
349 349 branch tip. See also 'Branch, head'. Note that because revision
350 350 numbers may be different in different repository clones, the
351 351 branch tip may be different in different cloned repositories.
352 352
353 353 Update
354 354 (Noun) Another synonym of changeset.
355 355
356 356 Example: "I've pushed an update".
357 357
358 358 (Verb) This term is usually used to describe updating the state of
359 359 the working directory to that of a specific changeset. See
360 360 :hg:`help update`.
361 361
362 362 Example: "You should update".
363 363
364 364 Working directory
365 365 See 'Directory, working'.
366 366
367 367 Working directory parent
368 368 See 'Parent, working directory'.
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