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=============================
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Specifying revision in Bazaar
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=============================
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Description of the subarguments for ``-r`` as used by commands such as
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**bzr log** and **bzr merge**.
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Revision specs and ranges
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=========================
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**bzr** has a very expressive way to specify a revision, or a range of revisions.
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We'll take the example of the **log** command.
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To specify a range of revisions, use for example::
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Revision identifiers and ranges
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-------------------------------
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Bazaar has a very expressive way to specify a revision or a range of revisions.
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To specify a range of revisions, the upper and lower bounds are separated by the
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``..`` symbol. For example::
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Omitting the lower bound doesn't work on currently released versions.
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Other commands, like **bzr cat** take only one revision, not a range, like::
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Some commands take only one revision, not a range. For example::
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$ bzr cat -r 42 foo.c
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Available revision specs
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========================
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The revision, or the bounds of the range, can be one of
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In other cases, a range is required but you want the length of the range to
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be one. For commands where this is relevant, the ``-c`` option is used like this::
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Available revision identifiers
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------------------------------
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The revision, or the bounds of the range, can be given using
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different format specifications as shown below.
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+----------------------+------------------------------------+
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| argument type | description |
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+----------------------+------------------------------------+
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| *number* | revision number |
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+----------------------+------------------------------------+
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| **revno**:*number* | positive revision number |
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| **revno**:*number* | revision number |
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+----------------------+------------------------------------+
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| **last**:*number* | negative revision number |
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+----------------------+------------------------------------+
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| *guid* | globally unique revision id |
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+----------------------+------------------------------------+
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| **revid**:*guid* | globally unique revision id |
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+----------------------+------------------------------------+
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| **before**:*rev* | leftmost parent of ''rev'' |
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+----------------------+------------------------------------+
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| **date**:*value* | first entry after a given date |
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| *date-value* | first entry after a given date |
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+----------------------+------------------------------------+
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| **date**:*date-value*| first entry after a given date |
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+----------------------+------------------------------------+
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| *tag-name* | revision matching a given tag |
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+----------------------+------------------------------------+
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| **tag**:*tag-name* | revision matching a given tag |
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+----------------------+------------------------------------+
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| **ancestor**:*path* | last merged revision from a branch |
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+----------------------+------------------------------------+
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| **branch**:*path* | latest revision on another branch |
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+----------------------+------------------------------------+
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| **submit**:*path* | common ancestor with submit branch |
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+----------------------+------------------------------------+
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A brief introduction to some of these formats is given below.
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For complete details, see `Revision Identifiers`_ in the
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Bazaar User Reference.
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.. _Revision Identifiers: ../user-reference/index.html#revision-identifiers
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Positive numbers denote revision numbers in the current branch. Revision
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numbers are labelled as "revno" in the output of **bzr log**. To display
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numbers are labelled as "revno" in the output of ``bzr log``. To display
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the log for the first ten revisions::
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The same as *number*, except that negative numbers are not allowed.
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The same as -''number''. **last:1** means the last commited revision.
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**revid** allows specifying a an internal revision ID, as show by **bzr
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testament** and some other commands.
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**revid** allows specifying an internal revision ID, as shown by ``bzr
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log --show-ids`` and some other commands.
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$ bzr log -r revid:Matthieu.Moy@imag.fr-20051026185030-93c7cad63ee570df
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''rev'' specifies the leftmost parent of ''rev'', that is the revision
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that appears before ''rev'' in the revision history, or the revision that
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was current when ''rev'' what comitted.
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was current when ''rev'' was committed.
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''rev'' can be any revision specifier.
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''rev'' can be any revision specifier and may be chained.
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$ bzr log -r date:yesterday..date:today
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**ancestor**:*path*
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specifies the common ancestor between the current branch,and a
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specifies the common ancestor between the current branch and a
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different branch. This is the same ancestor that would be used for
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merging purposes.
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*path* may be the URL of a remote branch, or the file path to a local branch.
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For example, to see what changes were made on a branch since it was forked
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$ bzr diff -r ancestor:../parent
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''path'' specifies the latest revision in another branch.
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``path`` specifies the latest revision in another branch.
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''path'' may be the URL of a remote branch, or the file path to a local branch.
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``path`` may be the URL of a remote branch, or the file path to a local branch.
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For example, to get the differences between this and another branch::