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    <p>I don't think it should be the responsibility of LibGit2Sharp to launch an external process. LibGit2Sharp goal is to provide a way to manipulate a git repository easily.</p> <p>It means you can use it to:</p> <ul> <li><p>Get the diff between files in the workdir and the previous version (in the index). To do that you can use the <code>Repository.Diff.Compare(IEnumerable&lt;string&gt; paths, bool includeUntracked, ExplicitPathsOptions explicitPathsOptions)</code> overload, which returns a <code>TreeChanges</code> object. From there, you can get a <code>TreeEntryChanges</code> object through the indexer of the treeChanges, which corresponds to the changes of a given file (use the .Patch property to get the actual content of the patch).</p></li> <li><p>Get the configured diff tool by using the <code>Repository.Config</code> namespace (e.g.: <code>repo.Config.Get&lt;string&gt;("diff.tool").Value</code>, although you should also check if the value returned by the <code>Get()</code> method is null in case no diff tool has been configured by the user). That way, you can launch the diff tool by yourself.</p></li> </ul> <p>Additional resources (v0.11.0):</p> <ul> <li>Diff workdir to index <a href="https://github.com/libgit2/libgit2sharp/blob/v0.11.0/LibGit2Sharp.Tests/DiffWorkdirToIndexFixture.cs" rel="nofollow">tests</a></li> <li>An <a href="https://github.com/libgit2/libgit2sharp/blob/v0.11.0/LibGit2Sharp.Tests/DiffTreeToTreeFixture.cs#L47-L70" rel="nofollow">example</a> showing how to use the <code>TreeChanges</code> object</li> <li><a href="https://github.com/libgit2/libgit2sharp/blob/v0.11.0/LibGit2Sharp.Tests/ConfigurationFixture.cs" rel="nofollow">Configuration fixture</a>, pretty self-explanatory</li> </ul> <hr> <p><strong>Note</strong>: it seems that at some point, you will need to know if a line has changed or not. I don't think there is an easy way to do that right now (apart from parsing the patch content manually). However, opening an issue on the LibGit2Sharp <a href="https://github.com/libgit2/libgit2sharp/issues" rel="nofollow">issue tracker</a> might trigger some discussion around that (feel free to weigh in what kind of API you would like to have to do that!).</p> <hr> <p><strong>Edit</strong>: Before launching the external diff tool, you will need to copy the content of the file which is in the index in a temporary folder. You can lookup the blob of a file in the index by doing something like:</p> <ul> <li>var indexEntry = repo.Index[fileName];</li> <li>var blob = repo.Lookup(indexEntry.Id);</li> </ul> <p>However... no filters are currently applied when you get the blob content, so the comparison is likely to produce false positives due to crlf differences. There is currently an <a href="https://github.com/libgit2/libgit2/issues/1264" rel="nofollow">issue</a> opened on libgit2 in order to propose an API to allow applying filters.</p>
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    1. POEquivalent to git difftool -y with libgit2sharp?
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    1. POEquivalent to git difftool -y with libgit2sharp?
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    1. COThanks yorah! In the meantime I found about Repository.Config and will have a more details look at it! Concerning the line changes I already have something which is parsing the diff but I am just waiting to have this changes https://github.com/libgit2/libgit2sharp/pull/423
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      1. USLaurent Kempé
 

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