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Initializing New GitHub Repository with API [message #871291] Fri, 11 May 2012 19:17 Go to next message
Owen Parrish is currently offline Owen Parrish
Messages: 3
Registered: May 2012
Junior Member
I want to use the GitHub API to initialize a newly created GitHub repository. I want to mimic the new functionality that's apart of the web UI, where a README will automatically be created and committed so that the fresh repo can just be cloned.

I'm having trouble though because every call to the GitHub API responds with a repository empty error.

I've tried following the procedure here: swanson.github.com/blog/2011/07/23/digging-around-the-github-api-take-2.html

That didn't work obviously because there are no existing commits.

So, then I thought I could:
1. create a blob
2. create a tree from that blob
3. commit that tree
4. create a reference pointing to that tree

That failed on step 1 because the repo is empty.

I've tried permutations of the above steps (creating the tree first, creating the ref first, creating the commit first) and each time - I get a repo empty error.

Is it even possible to do what I'm trying to do from starting from an empty repo?


[Updated on: Fri, 11 May 2012 19:18]

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Re: Initializing New GitHub Repository with API [message #871293 is a reply to message #871291] Fri, 11 May 2012 19:19 Go to previous messageGo to next message
Kevin Sawicki is currently offline Kevin Sawicki
Messages: 47
Registered: September 2011
Member
What exact error are you getting when it is failing?

Could you post the code snippet you are using for this as well?
Re: Initializing New GitHub Repository with API [message #871294 is a reply to message #871293] Fri, 11 May 2012 19:23 Go to previous messageGo to next message
Owen Parrish is currently offline Owen Parrish
Messages: 3
Registered: May 2012
Junior Member
Exact error is "Git Repository is empty. (409)" REALLY rough code is below. I added a content field to TreeEntry.

	public void initializeRepo() throws SmartServiceException {
		DataService service = createDataService();

		RepositoryId repo = new RepositoryId(repositoryOwner, repositoryName);

		try {
//			if (LOG.isDebugEnabled()) {
//				LOG.debug("Getting reference " + repo.toString() + "/"
//						+ MASTER_REFERENCE);
//			}
			
			//Create a blob for the file with its contents
//			String blobSha = service
//					.createBlob(
//							repo,
//							new Blob()
//									.setContent(
//											README_CONTENTS)
//									.setEncoding(Blob.ENCODING_UTF8));

			//create a new tree with our blob
			TreeEntry treeEntry = createTreeEntryWithContent(readmeFileName, README_CONTENTS);
			List<TreeEntry> treeEntries = new ArrayList<TreeEntry>();
			treeEntries.add(treeEntry);
			Tree newTree = service.createTree(repo, treeEntries);

			//Commit our blob
			Commit newCommit = new Commit().setTree(newTree);
			Commit createdCommit = service.createCommit(repo, newCommit);

			//Create a reference to the new tree
			Reference newRef = new Reference()
					.setObject((TypedResource) new TypedResource()
							.setType(TypedResource.TYPE_COMMIT)
							.setUrl(createdCommit.getUrl())
							.setSha(createdCommit.getSha())).setRef(MASTER_REFERENCE);

			Reference createdRef = service.createReference(repo, newRef);

		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	private TreeEntry createBlobTreeEntry(String path, String sha) {
		TreeEntry treeEntry = new TreeEntry();
		treeEntry.setPath(path);
		treeEntry.setMode(TreeEntry.MODE_BLOB);
		treeEntry.setSha(sha);
		treeEntry.setType(TreeEntry.TYPE_BLOB);

		return treeEntry;
	}
	
	private TreeEntry createTreeEntryWithContent(String path, String content) {
		TreeEntry treeEntry = new TreeEntry();
		treeEntry.setPath(path);
		treeEntry.setMode(TreeEntry.MODE_BLOB);
		treeEntry.setType(TreeEntry.TYPE_BLOB);
		treeEntry.setContent(content);

		return treeEntry;
	}

[Updated on: Fri, 11 May 2012 19:24]

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Re: Initializing New GitHub Repository with API [message #871303 is a reply to message #871294] Fri, 11 May 2012 20:27 Go to previous messageGo to next message
Kevin Sawicki is currently offline Kevin Sawicki
Messages: 47
Registered: September 2011
Member
Which call is throwing that exception?
Re: Initializing New GitHub Repository with API [message #871304 is a reply to message #871303] Fri, 11 May 2012 20:30 Go to previous message
Owen Parrish is currently offline Owen Parrish
Messages: 3
Registered: May 2012
Junior Member
That exception is thrown on the below line (when it's not commented out)

String blobSha = service.createBlob(repo,new Blob().setContent(README_CONTENTS).setEncoding(Blob.ENCODING_UTF8));


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