Get default branch of repo from GitHub api before downloading a GitHub dependency

code/+matbox/+setup/+internal/+github/+api/getDefaultBranch.m

@@ -0,0 +1,28 @@
+function defaultBranch = getDefaultBranch(owner, repoName)
+%GETDEFAULTBRANCH Returns the default branch of a GitHub repository.
+%   defaultBranch = getDefaultBranch(owner, repoName) queries the GitHub
+%   API to get the repository metadata and returns the default branch name.
+%
+%   Example:
+%       branch = getDefaultBranch('octocat', 'Hello-World');
+
+    % Build the API URL
+    apiUrl = sprintf('https://api.github.com/repos/%s/%s', owner, repoName);
+
+    requestOpts =  matbox.setup.internal.github.api.getGithubWebOptions();
+    requestOpts.Timeout = 10;
+    requestOpts.ContentType = 'json';
+
+    try
+        response = webread(apiUrl, requestOpts);
+    catch ME
+        error('Failed to fetch repository info: %s', ME.message);
+    end
+
+    % Extract the default_branch field
+    if isfield(response, 'default_branch')
+        defaultBranch = response.default_branch;
+    else
+        error('default_branch field not found in API response.');
+    end
+end

code/+matbox/+setup/+internal/installGithubRepository.m

@@ -17,18 +17,20 @@
         repositoryUrl (1,1) string
         branchName (1,1) string = "main"
         options.Update (1,1) logical = false
+        options.UseGit (1,1) logical = false
         options.InstallationLocation (1,1) string = matbox.setup.internal.getDefaultAddonFolder()
         options.AddToPath (1,1) logical = true
         options.AddToPathWithSubfolders (1,1) logical = true
         options.Verbose (1,1) logical = true
     end
 
-    % Branch name might be set to missing from upstream callers
-    % Todo: Should default to "default" and use git api to resolve name of
-    % default branch
-    if ismissing(branchName); branchName = "main"; end
-
-    [ownerName, repositoryName] = matbox.setup.internal.github.parseRepositoryURL(repositoryUrl);
+    [ownerName, repositoryName] = ...
+        matbox.setup.internal.github.parseRepositoryURL(repositoryUrl);
+
+    if ismissing(branchName) % - Get default branchname
+        branchName = matbox.setup.internal.github.api.getDefaultBranch(...
+            ownerName, repositoryName);
+    end
 
     [repoExists, repoFolderLocation] = ...
         matbox.setup.internal.pathtool.lookForRepository(repositoryName, branchName);