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<HTML
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>The Bugzilla Guide - 2.17.5
Development Release</TH
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><DIV
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><H1
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><A
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></A
>3.6. Patch Viewer</H1
><P
>Viewing and reviewing patches in Bugzilla is often difficult due to
lack of context, improper format and the inherent readability issues that
raw patches present. Patch Viewer is an enhancement to Bugzilla designed
to fix that by offering increased context, linking to sections, and
integrating with Bonsai, LXR and CVS.</P
><P
>Patch viewer allows you to:</P
><P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
>View patches in color, with side-by-side view rather than trying
to interpret the contents of the patch.</TD
></TR
><TR
><TD
>See the difference between two patches.</TD
></TR
><TR
><TD
>Get more context in a patch.</TD
></TR
><TR
><TD
>Collapse and expand sections of a patch for easy
reading.</TD
></TR
><TR
><TD
>Link to a particular section of a patch for discussion or
review</TD
></TR
><TR
><TD
>Go to Bonsai or LXR to see more context, blame, and
cross-references for the part of the patch you are looking at</TD
></TR
><TR
><TD
>Create a rawtext unified format diff out of any patch, no
matter what format it came from</TD
></TR
></TBODY
></TABLE
><P
></P
><DIV
CLASS="section"
><H2
CLASS="section"
><A
NAME="patchviewer_view"
></A
>3.6.1. Viewing Patches in Patch Viewer</H2
><P
>The main way to view a patch in patch viewer is to click on the
"Diff" link next to a patch in the Attachments list on a bug. You may
also do this within the edit window by clicking the "View Attachment As
Diff" button in the Edit Attachment screen.</P
></DIV
><DIV
CLASS="section"
><H2
CLASS="section"
><A
NAME="patchviewer_diff"
></A
>3.6.2. Seeing the Difference Between Two Patches</H2
><P
>To see the difference between two patches, you must first view the
newer patch in Patch Viewer. Then select the older patch from the
dropdown at the top of the page ("Differences between [dropdown] and
this patch") and click the "Diff" button. This will show you what
is new or changed in the newer patch.</P
></DIV
><DIV
CLASS="section"
><H2
CLASS="section"
><A
NAME="patchviewer_context"
></A
>3.6.3. Getting More Context in a Patch</H2
><P
>To get more context in a patch, you put a number in the textbox at
the top of Patch Viewer ("Patch / File / [textbox]") and hit enter.
This will give you that many lines of context before and after each
change. Alternatively, you can click on the "File" link there and it
will show each change in the full context of the file. This feature only
works against files that were diffed using "cvs diff".</P
></DIV
><DIV
CLASS="section"
><H2
CLASS="section"
><A
NAME="patchviewer_collapse"
></A
>3.6.4. Collapsing and Expanding Sections of a Patch</H2
><P
>To view only a certain set of files in a patch (for example, if a
patch is absolutely huge and you want to only review part of it at a
time), you can click the "(+)" and "(-)" links next to each file (to
expand it or collapse it). If you want to collapse all files or expand
all files, you can click the "Collapse All" and "Expand All" links at the
top of the page.</P
></DIV
><DIV
CLASS="section"
><H2
CLASS="section"
><A
NAME="patchviewer_link"
></A
>3.6.5. Linking to a Section of a Patch</H2
><P
>To link to a section of a patch (for example, if you want to be
able to give someone a URL to show them which part you are talking
about) you simply click the "Link Here" link on the section header. The
resulting URL can be copied and used in discussion. (Copy Link
Location in Mozilla works as well.)</P
></DIV
><DIV
CLASS="section"
><H2
CLASS="section"
><A
NAME="patchviewer_bonsai_lxr"
></A
>3.6.6. Going to Bonsai and LXR</H2
><P
>To go to Bonsai to get blame for the lines you are interested in,
you can click the "Lines XX-YY" link on the section header you are
interested in. This works even if the patch is against an old
version of the file, since Bonsai stores all versions of the file.</P
><P
>To go to LXR, you click on the filename on the file header
(unfortunately, since LXR only does the most recent version, line
numbers are likely to rot).</P
></DIV
><DIV
CLASS="section"
><H2
CLASS="section"
><A
NAME="patchviewer_unified_diff"
></A
>3.6.7. Creating a Unified Diff</H2
><P
>If the patch is not in a format that you like, you can turn it
into a unified diff format by clicking the "Raw Unified" link at the top
of the page.</P
></DIV
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