Gecko [ nbspublicschool.com ]

Name	Size	Permission
RelNotes	[ DIR ]	drwxr-xr-x
contrib	[ DIR ]	drwxr-xr-x
howto	[ DIR ]	drwxr-xr-x
technical	[ DIR ]	drwxr-xr-x
COPYING	18.33 KB	-rw-r--r--
README	2.56 KB	-rw-r--r--
blame-options.txt	3.95 KB	-rw-r--r--
cmds-ancillaryinterrogators.tx...	1.18 KB	-rw-r--r--
cmds-ancillarymanipulators.txt	1005 B	-rw-r--r--
cmds-foreignscminterface.txt	760 B	-rw-r--r--
cmds-mainporcelain.txt	2.5 KB	-rw-r--r--
cmds-plumbinginterrogators.txt	1.34 KB	-rw-r--r--
cmds-plumbingmanipulators.txt	1.21 KB	-rw-r--r--
cmds-purehelpers.txt	1.11 KB	-rw-r--r--
cmds-synchelpers.txt	543 B	-rw-r--r--
cmds-synchingrepositories.txt	397 B	-rw-r--r--
config.txt	90.14 KB	-rw-r--r--
date-formats.txt	848 B	-rw-r--r--
diff-config.txt	6.87 KB	-rw-r--r--
diff-format.txt	5.44 KB	-rw-r--r--
diff-generate-patch.txt	6.44 KB	-rw-r--r--
diff-options.txt	18.12 KB	-rw-r--r--
docbook-xsl.css	4.45 KB	-rw-r--r--
everyday.html	35.06 KB	-rw-r--r--
everyday.txt	12.71 KB	-rw-r--r--
fetch-options.txt	4.22 KB	-rw-r--r--
git-add.html	35.63 KB	-rw-r--r--
git-add.txt	13.96 KB	-rw-r--r--
git-am.html	25.86 KB	-rw-r--r--
git-am.txt	6.02 KB	-rw-r--r--
git-annotate.html	23.32 KB	-rw-r--r--
git-annotate.txt	752 B	-rw-r--r--
git-apply.html	30.82 KB	-rw-r--r--
git-apply.txt	10.07 KB	-rw-r--r--
git-archive.html	25.88 KB	-rw-r--r--
git-archive.txt	6.05 KB	-rw-r--r--
git-bisect-lk2009.html	78.86 KB	-rw-r--r--
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git-bisect.html	33.08 KB	-rw-r--r--
git-bisect.txt	12.38 KB	-rw-r--r--
git-blame.html	37.08 KB	-rw-r--r--
git-blame.txt	7.63 KB	-rw-r--r--
git-branch.html	31.29 KB	-rw-r--r--
git-branch.txt	9.87 KB	-rw-r--r--
git-bundle.html	25.72 KB	-rw-r--r--
git-bundle.txt	6.89 KB	-rw-r--r--
git-cat-file.html	21.04 KB	-rw-r--r--
git-cat-file.txt	2.9 KB	-rw-r--r--
git-check-attr.html	21.17 KB	-rw-r--r--
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git-check-ignore.html	20.25 KB	-rw-r--r--
git-check-ignore.txt	2.35 KB	-rw-r--r--
git-check-ref-format.html	22.43 KB	-rw-r--r--
git-check-ref-format.txt	4.08 KB	-rw-r--r--
git-checkout-index.html	24.34 KB	-rw-r--r--
git-checkout-index.txt	5.31 KB	-rw-r--r--
git-checkout.html	38.47 KB	-rw-r--r--
git-checkout.txt	15.61 KB	-rw-r--r--
git-cherry-pick.html	28.28 KB	-rw-r--r--
git-cherry-pick.txt	7.73 KB	-rw-r--r--
git-cherry.html	19.15 KB	-rw-r--r--
git-cherry.txt	1.71 KB	-rw-r--r--
git-citool.html	17.13 KB	-rw-r--r--
git-citool.txt	543 B	-rw-r--r--
git-clean.html	19.45 KB	-rw-r--r--
git-clean.txt	1.92 KB	-rw-r--r--
git-clone.html	34.75 KB	-rw-r--r--
git-clone.txt	9.84 KB	-rw-r--r--
git-column.html	18.47 KB	-rw-r--r--
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git-commit-tree.html	25.04 KB	-rw-r--r--
git-commit-tree.txt	2.79 KB	-rw-r--r--
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git-config.html	181.42 KB	-rw-r--r--
git-config.txt	11.52 KB	-rw-r--r--
git-count-objects.html	18.11 KB	-rw-r--r--
git-count-objects.txt	1.06 KB	-rw-r--r--
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git-credential-cache.txt	2.13 KB	-rw-r--r--
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git-credential-store.txt	2.11 KB	-rw-r--r--
git-credential.html	23.82 KB	-rw-r--r--
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git-cvsexportcommit.html	21.34 KB	-rw-r--r--
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git-cvsimport.html	27.62 KB	-rw-r--r--
git-cvsimport.txt	7.57 KB	-rw-r--r--
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git-cvsserver.txt	15.21 KB	-rw-r--r--
git-daemon.html	32.69 KB	-rw-r--r--
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git-describe.html	24.35 KB	-rw-r--r--
git-describe.txt	5.59 KB	-rw-r--r--
git-diff-files.html	59.9 KB	-rw-r--r--
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git-diff-index.html	64.69 KB	-rw-r--r--
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git-diff-tree.html	82.31 KB	-rw-r--r--
git-diff-tree.txt	5.26 KB	-rw-r--r--
git-diff.html	66.63 KB	-rw-r--r--
git-diff.txt	5.34 KB	-rw-r--r--
git-difftool.html	22.93 KB	-rw-r--r--
git-difftool.txt	4.02 KB	-rw-r--r--
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git-fast-export.txt	5.16 KB	-rw-r--r--
git-fast-import.html	92.66 KB	-rw-r--r--
git-fast-import.txt	53.75 KB	-rw-r--r--
git-fetch-pack.html	21.26 KB	-rw-r--r--
git-fetch-pack.txt	3.28 KB	-rw-r--r--
git-fetch.html	38.95 KB	-rw-r--r--
git-fetch.txt	2.65 KB	-rw-r--r--
git-filter-branch.html	37.67 KB	-rw-r--r--
git-filter-branch.txt	16.84 KB	-rw-r--r--
git-fmt-merge-msg.html	19.55 KB	-rw-r--r--
git-fmt-merge-msg.txt	1.87 KB	-rw-r--r--
git-for-each-ref.html	25.45 KB	-rw-r--r--
git-for-each-ref.txt	5.72 KB	-rw-r--r--
git-format-patch.html	58.91 KB	-rw-r--r--
git-format-patch.txt	18.38 KB	-rw-r--r--
git-fsck-objects.html	16.88 KB	-rw-r--r--
git-fsck-objects.txt	354 B	-rw-r--r--
git-fsck.html	23.33 KB	-rw-r--r--
git-fsck.txt	4.54 KB	-rw-r--r--
git-gc.html	23.82 KB	-rw-r--r--
git-gc.txt	5.34 KB	-rw-r--r--
git-get-tar-commit-id.html	17.32 KB	-rw-r--r--
git-get-tar-commit-id.txt	737 B	-rw-r--r--
git-grep.html	29.02 KB	-rw-r--r--
git-grep.txt	7.55 KB	-rw-r--r--
git-gui.html	22.1 KB	-rw-r--r--
git-gui.txt	3.5 KB	-rw-r--r--
git-hash-object.html	18.92 KB	-rw-r--r--
git-hash-object.txt	1.8 KB	-rw-r--r--
git-help.html	25.14 KB	-rw-r--r--
git-help.txt	5.99 KB	-rw-r--r--
git-http-backend.html	28.46 KB	-rw-r--r--
git-http-backend.txt	9.48 KB	-rw-r--r--
git-http-fetch.html	18.41 KB	-rw-r--r--
git-http-fetch.txt	1.14 KB	-rw-r--r--
git-http-push.html	20.73 KB	-rw-r--r--
git-http-push.txt	2.91 KB	-rw-r--r--
git-imap-send.html	22.84 KB	-rw-r--r--
git-imap-send.txt	4.24 KB	-rw-r--r--
git-index-pack.html	21.01 KB	-rw-r--r--
git-index-pack.txt	3.32 KB	-rw-r--r--
git-init-db.html	16.95 KB	-rw-r--r--
git-init-db.txt	409 B	-rw-r--r--
git-init.html	23 KB	-rw-r--r--
git-init.txt	4.69 KB	-rw-r--r--
git-instaweb.html	20.06 KB	-rw-r--r--
git-instaweb.txt	2.25 KB	-rw-r--r--
git-log.html	111.87 KB	-rw-r--r--
git-log.txt	5.68 KB	-rw-r--r--
git-lost-found.html	18.83 KB	-rw-r--r--
git-lost-found.txt	1.69 KB	-rw-r--r--
git-ls-files.html	26.46 KB	-rw-r--r--
git-ls-files.txt	6.1 KB	-rw-r--r--
git-ls-remote.html	20.11 KB	-rw-r--r--
git-ls-remote.txt	2.54 KB	-rw-r--r--
git-ls-tree.html	21.06 KB	-rw-r--r--
git-ls-tree.txt	2.93 KB	-rw-r--r--
git-mailinfo.html	20.78 KB	-rw-r--r--
git-mailinfo.txt	3 KB	-rw-r--r--
git-mailsplit.html	18.52 KB	-rw-r--r--
git-mailsplit.txt	1.21 KB	-rw-r--r--
git-merge-base.html	23.17 KB	-rw-r--r--
git-merge-base.txt	4.32 KB	-rw-r--r--
git-merge-file.html	20.71 KB	-rw-r--r--
git-merge-file.txt	2.72 KB	-rw-r--r--
git-merge-index.html	19.88 KB	-rw-r--r--
git-merge-index.txt	2.39 KB	-rw-r--r--
git-merge-one-file.html	16.9 KB	-rw-r--r--
git-merge-one-file.txt	387 B	-rw-r--r--
git-merge-tree.html	17.32 KB	-rw-r--r--
git-merge-tree.txt	749 B	-rw-r--r--
git-merge.html	50.38 KB	-rw-r--r--
git-merge.txt	11.97 KB	-rw-r--r--
git-mergetool--lib.html	18.23 KB	-rw-r--r--
git-mergetool--lib.txt	1.18 KB	-rw-r--r--
git-mergetool.html	20.98 KB	-rw-r--r--
git-mergetool.txt	3.26 KB	-rw-r--r--
git-mktag.html	17.63 KB	-rw-r--r--
git-mktag.txt	806 B	-rw-r--r--
git-mktree.html	17.94 KB	-rw-r--r--
git-mktree.txt	1.05 KB	-rw-r--r--
git-mv.html	18.33 KB	-rw-r--r--
git-mv.txt	1.16 KB	-rw-r--r--
git-name-rev.html	19.17 KB	-rw-r--r--
git-name-rev.txt	1.68 KB	-rw-r--r--
git-notes.html	35.71 KB	-rw-r--r--
git-notes.txt	13.08 KB	-rw-r--r--
git-p4.html	44.35 KB	-rw-r--r--
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git-pack-objects.html	28.46 KB	-rw-r--r--
git-pack-objects.txt	8.86 KB	-rw-r--r--
git-pack-redundant.html	18.24 KB	-rw-r--r--
git-pack-redundant.txt	1.13 KB	-rw-r--r--
git-pack-refs.html	19.15 KB	-rw-r--r--
git-pack-refs.txt	2.06 KB	-rw-r--r--
git-parse-remote.html	16.97 KB	-rw-r--r--
git-parse-remote.txt	471 B	-rw-r--r--
git-patch-id.html	17.71 KB	-rw-r--r--
git-patch-id.txt	940 B	-rw-r--r--
git-peek-remote.html	18.03 KB	-rw-r--r--
git-peek-remote.txt	1.08 KB	-rw-r--r--
git-prune-packed.html	17.99 KB	-rw-r--r--
git-prune-packed.txt	935 B	-rw-r--r--
git-prune.html	19.57 KB	-rw-r--r--
git-prune.txt	1.76 KB	-rw-r--r--
git-pull.html	54.96 KB	-rw-r--r--
git-pull.txt	7.72 KB	-rw-r--r--
git-push.html	48.49 KB	-rw-r--r--
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git-quiltimport.html	18.4 KB	-rw-r--r--
git-quiltimport.txt	1.4 KB	-rw-r--r--
git-read-tree.html	38.05 KB	-rw-r--r--
git-read-tree.txt	16.36 KB	-rw-r--r--
git-rebase.html	57.88 KB	-rw-r--r--
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git-receive-pack.html	23.98 KB	-rw-r--r--
git-receive-pack.txt	5.48 KB	-rw-r--r--
git-reflog.html	20.86 KB	-rw-r--r--
git-reflog.txt	3.09 KB	-rw-r--r--
git-relink.html	17.41 KB	-rw-r--r--
git-relink.txt	649 B	-rw-r--r--
git-remote-ext.html	22.43 KB	-rw-r--r--
git-remote-ext.txt	3.93 KB	-rw-r--r--
git-remote-fd.html	19 KB	-rw-r--r--
git-remote-fd.txt	1.63 KB	-rw-r--r--
git-remote-helpers.html	16.45 KB	-rw-r--r--
git-remote-testgit.html	17.26 KB	-rw-r--r--
git-remote-testgit.txt	570 B	-rw-r--r--
git-remote.html	26.62 KB	-rw-r--r--
git-remote.txt	6.79 KB	-rw-r--r--
git-repack.html	22.99 KB	-rw-r--r--
git-repack.txt	4.52 KB	-rw-r--r--
git-replace.html	19.86 KB	-rw-r--r--
git-replace.txt	2.26 KB	-rw-r--r--
git-repo-config.html	16.85 KB	-rw-r--r--
git-repo-config.txt	324 B	-rw-r--r--
git-request-pull.html	17.41 KB	-rw-r--r--
git-request-pull.txt	528 B	-rw-r--r--
git-rerere.html	25.93 KB	-rw-r--r--
git-rerere.txt	7.29 KB	-rw-r--r--
git-reset.html	36.54 KB	-rw-r--r--
git-reset.txt	14.15 KB	-rw-r--r--
git-rev-list.html	73.64 KB	-rw-r--r--
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git-rev-parse.html	46.91 KB	-rw-r--r--
git-rev-parse.txt	10.03 KB	-rw-r--r--
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git-revert.txt	3.69 KB	-rw-r--r--
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git-send-email.html	36.99 KB	-rw-r--r--
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git-svn.html	73.85 KB	-rw-r--r--
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git-symbolic-ref.html	19.37 KB	-rw-r--r--
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git-tools.html	22.01 KB	-rw-r--r--
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gitcli.html	26.56 KB	-rw-r--r--
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gitcore-tutorial.html	99.92 KB	-rw-r--r--
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gitcredentials.html	24.45 KB	-rw-r--r--
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gitglossary.html	48.63 KB	-rw-r--r--
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gitignore.html	24.81 KB	-rw-r--r--
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gitk.html	21.61 KB	-rw-r--r--
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i18n.txt	2.16 KB	-rw-r--r--
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<body class="manpage">
<div id="header">
<h1>
gitdiffcore(7) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>gitdiffcore -
   Tweaking diff output
</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><em>git diff</em> *</pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>The diff commands <em>git diff-index</em>, <em>git diff-files</em>, and <em>git diff-tree</em>
can be told to manipulate differences they find in
unconventional ways before showing <em>diff</em> output.  The manipulation
is collectively called "diffcore transformation".  This short note
describes what they are and how to use them to produce <em>diff</em> output
that is easier to understand than the conventional kind.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_the_chain_of_operation">The chain of operation</h2>
<div class="sectionbody">
<div class="paragraph"><p>The <em>git diff-&#42;</em> family works by first comparing two sets of
files:</p></div>
<div class="ulist"><ul>
<li>
<p>
<em>git diff-index</em> compares contents of a "tree" object and the
   working directory (when <em>--cached</em> flag is not used) or a
   "tree" object and the index file (when <em>--cached</em> flag is
   used);
</p>
</li>
<li>
<p>
<em>git diff-files</em> compares contents of the index file and the
   working directory;
</p>
</li>
<li>
<p>
<em>git diff-tree</em> compares contents of two "tree" objects;
</p>
</li>
</ul></div>
<div class="paragraph"><p>In all of these cases, the commands themselves first optionally limit
the two sets of files by any pathspecs given on their command-lines,
and compare corresponding paths in the two resulting sets of files.</p></div>
<div class="paragraph"><p>The pathspecs are used to limit the world diff operates in.  They remove
the filepairs outside the specified sets of pathnames.  E.g. If the
input set of filepairs included:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>:100644 100644 bcd1234... 0123456... M junkfile</code></pre>
</div></div>
<div class="paragraph"><p>but the command invocation was <code>git diff-files myfile</code>, then the
junkfile entry would be removed from the list because only "myfile"
is under consideration.</p></div>
<div class="paragraph"><p>The result of comparison is passed from these commands to what is
internally called "diffcore", in a format similar to what is output
when the -p option is not used.  E.g.</p></div>
<div class="listingblock">
<div class="content">
<pre><code>in-place edit  :100644 100644 bcd1234... 0123456... M file0
create         :000000 100644 0000000... 1234567... A file4
delete         :100644 000000 1234567... 0000000... D file5
unmerged       :000000 000000 0000000... 0000000... U file6</code></pre>
</div></div>
<div class="paragraph"><p>The diffcore mechanism is fed a list of such comparison results
(each of which is called "filepair", although at this point each
of them talks about a single file), and transforms such a list
into another list.  There are currently 5 such transformations:</p></div>
<div class="ulist"><ul>
<li>
<p>
diffcore-break
</p>
</li>
<li>
<p>
diffcore-rename
</p>
</li>
<li>
<p>
diffcore-merge-broken
</p>
</li>
<li>
<p>
diffcore-pickaxe
</p>
</li>
<li>
<p>
diffcore-order
</p>
</li>
</ul></div>
<div class="paragraph"><p>These are applied in sequence.  The set of filepairs <em>git diff-&#42;</em>
commands find are used as the input to diffcore-break, and
the output from diffcore-break is used as the input to the
next transformation.  The final result is then passed to the
output routine and generates either diff-raw format (see Output
format sections of the manual for <em>git diff-&#42;</em> commands) or
diff-patch format.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_diffcore_break_for_splitting_up_complete_rewrites">diffcore-break: For Splitting Up "Complete Rewrites"</h2>
<div class="sectionbody">
<div class="paragraph"><p>The second transformation in the chain is diffcore-break, and is
controlled by the -B option to the <em>git diff-&#42;</em> commands.  This is
used to detect a filepair that represents "complete rewrite" and
break such filepair into two filepairs that represent delete and
create.  E.g.  If the input contained this filepair:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>:100644 100644 bcd1234... 0123456... M file0</code></pre>
</div></div>
<div class="paragraph"><p>and if it detects that the file "file0" is completely rewritten,
it changes it to:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>:100644 000000 bcd1234... 0000000... D file0
:000000 100644 0000000... 0123456... A file0</code></pre>
</div></div>
<div class="paragraph"><p>For the purpose of breaking a filepair, diffcore-break examines
the extent of changes between the contents of the files before
and after modification (i.e. the contents that have "bcd1234&#8230;"
and "0123456&#8230;" as their SHA-1 content ID, in the above
example).  The amount of deletion of original contents and
insertion of new material are added together, and if it exceeds
the "break score", the filepair is broken into two.  The break
score defaults to 50% of the size of the smaller of the original
and the result (i.e. if the edit shrinks the file, the size of
the result is used; if the edit lengthens the file, the size of
the original is used), and can be customized by giving a number
after "-B" option (e.g. "-B75" to tell it to use 75%).</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_diffcore_rename_for_detection_renames_and_copies">diffcore-rename: For Detection Renames and Copies</h2>
<div class="sectionbody">
<div class="paragraph"><p>This transformation is used to detect renames and copies, and is
controlled by the -M option (to detect renames) and the -C option
(to detect copies as well) to the <em>git diff-&#42;</em> commands.  If the
input contained these filepairs:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>:100644 000000 0123456... 0000000... D fileX
:000000 100644 0000000... 0123456... A file0</code></pre>
</div></div>
<div class="paragraph"><p>and the contents of the deleted file fileX is similar enough to
the contents of the created file file0, then rename detection
merges these filepairs and creates:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>:100644 100644 0123456... 0123456... R100 fileX file0</code></pre>
</div></div>
<div class="paragraph"><p>When the "-C" option is used, the original contents of modified files,
and deleted files (and also unmodified files, if the
"--find-copies-harder" option is used) are considered as candidates
of the source files in rename/copy operation.  If the input were like
these filepairs, that talk about a modified file fileY and a newly
created file file0:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>:100644 100644 0123456... 1234567... M fileY
:000000 100644 0000000... bcd3456... A file0</code></pre>
</div></div>
<div class="paragraph"><p>the original contents of fileY and the resulting contents of
file0 are compared, and if they are similar enough, they are
changed to:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>:100644 100644 0123456... 1234567... M fileY
:100644 100644 0123456... bcd3456... C100 fileY file0</code></pre>
</div></div>
<div class="paragraph"><p>In both rename and copy detection, the same "extent of changes"
algorithm used in diffcore-break is used to determine if two
files are "similar enough", and can be customized to use
a similarity score different from the default of 50% by giving a
number after the "-M" or "-C" option (e.g. "-M8" to tell it to use
8/10 = 80%).</p></div>
<div class="paragraph"><p>Note.  When the "-C" option is used with <code>--find-copies-harder</code>
option, <em>git diff-&#42;</em> commands feed unmodified filepairs to
diffcore mechanism as well as modified ones.  This lets the copy
detector consider unmodified files as copy source candidates at
the expense of making it slower.  Without <code>--find-copies-harder</code>,
<em>git diff-&#42;</em> commands can detect copies only if the file that was
copied happened to have been modified in the same changeset.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_diffcore_merge_broken_for_putting_complete_rewrites_back_together">diffcore-merge-broken: For Putting "Complete Rewrites" Back Together</h2>
<div class="sectionbody">
<div class="paragraph"><p>This transformation is used to merge filepairs broken by
diffcore-break, and not transformed into rename/copy by
diffcore-rename, back into a single modification.  This always
runs when diffcore-break is used.</p></div>
<div class="paragraph"><p>For the purpose of merging broken filepairs back, it uses a
different "extent of changes" computation from the ones used by
diffcore-break and diffcore-rename.  It counts only the deletion
from the original, and does not count insertion.  If you removed
only 10 lines from a 100-line document, even if you added 910
new lines to make a new 1000-line document, you did not do a
complete rewrite.  diffcore-break breaks such a case in order to
help diffcore-rename to consider such filepairs as candidate of
rename/copy detection, but if filepairs broken that way were not
matched with other filepairs to create rename/copy, then this
transformation merges them back into the original
"modification".</p></div>
<div class="paragraph"><p>The "extent of changes" parameter can be tweaked from the
default 80% (that is, unless more than 80% of the original
material is deleted, the broken pairs are merged back into a
single modification) by giving a second number to -B option,
like these:</p></div>
<div class="ulist"><ul>
<li>
<p>
-B50/60 (give 50% "break score" to diffcore-break, use 60%
  for diffcore-merge-broken).
</p>
</li>
<li>
<p>
-B/60 (the same as above, since diffcore-break defaults to 50%).
</p>
</li>
</ul></div>
<div class="paragraph"><p>Note that earlier implementation left a broken pair as a separate
creation and deletion patches.  This was an unnecessary hack and
the latest implementation always merges all the broken pairs
back into modifications, but the resulting patch output is
formatted differently for easier review in case of such
a complete rewrite by showing the entire contents of old version
prefixed with <em>-</em>, followed by the entire contents of new
version prefixed with <em>+</em>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_diffcore_pickaxe_for_detecting_addition_deletion_of_specified_string">diffcore-pickaxe: For Detecting Addition/Deletion of Specified String</h2>
<div class="sectionbody">
<div class="paragraph"><p>This transformation is used to find filepairs that represent
changes that touch a specified string, and is controlled by the
-S option and the <code>--pickaxe-all</code> option to the <em>git diff-*</em>
commands.</p></div>
<div class="paragraph"><p>When diffcore-pickaxe is in use, it checks if there are
filepairs whose "result" side and whose "origin" side have
different number of specified string.  Such a filepair represents
"the string appeared in this changeset".  It also checks for the
opposite case that loses the specified string.</p></div>
<div class="paragraph"><p>When <code>--pickaxe-all</code> is not in effect, diffcore-pickaxe leaves
only such filepairs that touch the specified string in its
output.  When <code>--pickaxe-all</code> is used, diffcore-pickaxe leaves all
filepairs intact if there is such a filepair, or makes the
output empty otherwise.  The latter behaviour is designed to
make reviewing of the changes in the context of the whole
changeset easier.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_diffcore_order_for_sorting_the_output_based_on_filenames">diffcore-order: For Sorting the Output Based on Filenames</h2>
<div class="sectionbody">
<div class="paragraph"><p>This is used to reorder the filepairs according to the user&#8217;s
(or project&#8217;s) taste, and is controlled by the -O option to the
<em>git diff-&#42;</em> commands.</p></div>
<div class="paragraph"><p>This takes a text file each of whose lines is a shell glob
pattern.  Filepairs that match a glob pattern on an earlier line
in the file are output before ones that match a later line, and
filepairs that do not match any glob pattern are output last.</p></div>
<div class="paragraph"><p>As an example, a typical orderfile for the core Git probably
would look like this:</p></div>
<div class="listingblock">
<div class="content">
<pre><code>README
Makefile
Documentation
*.h
*.c
t</code></pre>
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="paragraph"><p><a href="git-diff.html">git-diff(1)</a>,
<a href="git-diff-files.html">git-diff-files(1)</a>,
<a href="git-diff-index.html">git-diff-index(1)</a>,
<a href="git-diff-tree.html">git-diff-tree(1)</a>,
<a href="git-format-patch.html">git-format-patch(1)</a>,
<a href="git-log.html">git-log(1)</a>,
<a href="gitglossary.html">gitglossary(7)</a>,
<a href="user-manual.html">The Git User&#8217;s Manual</a></p></div>
</div>
</div>
<div class="sect1">
<h2 id="_git">GIT</h2>
<div class="sectionbody">
<div class="paragraph"><p>Part of the <a href="git.html">git(1)</a> suite.</p></div>
</div>
</div>
</div>
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<div id="footer-text">
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