7
The ``bzr log`` command shows a list of previous revisions.
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As with ``bzr diff``, ``bzr log`` supports the ``-r`` argument::
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% bzr log -r 1000.. # Revision 1000 and everything after it
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% bzr log -r ..1000 # Everything up to and including r1000
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% bzr log -r 1000..1100 # changes from 1000 to 1100
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% bzr log -r 1000 # The changes in only revision 1000
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As distributed VCS tools like Bazaar make merging much easier than
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it is in central VCS tools, the history of a branch may often show
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lines of development splitting off the mainline and merging back
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in at a later time. Technically, the relationship between the
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numerous revision nodes is known as a Directed Acyclic Graph or
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In many cases though, you may only be interested in seeing the *mainline*
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for a brach, namely the primary line of development within the DAG.
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To do this, use the following command::
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If you do this commonly, you may even wish to create an alias for it
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as explained in `Using aliases`_.
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The ``log`` command has several options that are useful for tuning
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the output. These include:
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* ``--forward`` presents the log in chronological order, i.e. the
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most recent revisions are displayed last.
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* the ``--limit`` option controls the maximum number of revisions displayed.
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See the online help for the log command or the User Reference for more
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information on tuning the output.
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Viewing the history for a file
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------------------------------
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It is often useful to filter the history so that it only
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applies to a given file. To do this, provide the filename
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to the ``log`` command like this::
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Viewing an old version of a file
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--------------------------------
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To get the contents of a file at a given version, use the
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``cat`` command like this::
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where ``X`` is the revision identifier and ``file`` is
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the filename. This will send output to the standard output
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stream so you'll typically want to pipe the output through
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a viewing tool (like ``less`` or ``more``) or redirect it
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bzr cat -r -2 foo.py | less
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bzr car -r 1 foo.py > /tmp/foo-1st-version.py
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Graphical history viewers
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-------------------------
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History browsing is one area where GUI tools really make life easier.
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Bazaar has numerous plug-ins that provide this capability including
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QBzr and bzr-gtk. See `Using plugins`_ for details on how to install
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these if they are not already installed.
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To use the graphical viewer from QBzr::
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To use the graphical viewer from bzr-gtk::
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``viz`` is actually a built-in alias for ``visualize`` so use the longer
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command name if you prefer.
added
removed
doc/en/user-guide/browsing_history.txt
