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How to get changed file info specific to a commit using JGit [message #1059026]

Thu, 16 May 2013 09:32

Akira Tsuchiya

Messages: 1
Registered: May 2013

Junior Member

I want to know how to get only changed files' information specific to a commit.
And how to get a changed file's unified diff.

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Re: How to get changed file info specific to a commit using JGit [message #1059583 is a reply to message #1059026]

Mon, 20 May 2013 15:20

Chris Aniszczyk

Messages: 674
Registered: July 2009

Senior Member

You can use the DiffCommand. See the DiffCommandTest for some examples:
http://git.eclipse.org/c/jgit/jgit.git/tree/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/DiffCommandTest.java

Something like this should work though:
ObjectId headId = repository.resolve("HEAD^{tree}");
ObjectId oldId = repository.resolve(commitSha + "^{tree}");
ObjectReader reader = repository.newObjectReader();

CanonicalTreeParser oldTreeIter = new CanonicalTreeParser();
oldTreeIter.reset(reader, oldId);
CanonicalTreeParser newTreeIter = new CanonicalTreeParser();
newTreeIter.reset(reader, headId);

List<DiffEntry> diffs= git.diff()
.setNewTree(newTreeIter)
.setOldTree(oldTreeIter)
.call();

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