Add github protocol pulling and http:// (#11465)

As pulling protocols to llama-run

Signed-off-by: Eric Curtin <[email protected]>

Author: ericcurtin

examples/run/run.cpp

@@ -673,6 +673,40 @@ class LlamaData {
         return download(blob_url, bn, true, headers);
     }
 
+    int github_dl(const std::string & model, const std::string & bn) {
+        std::string repository = model;
+        std::string branch     = "main";
+        size_t      at_pos     = model.find('@');
+        if (at_pos != std::string::npos) {
+            repository = model.substr(0, at_pos);
+            branch     = model.substr(at_pos + 1);
+        }
+
+        std::vector<std::string> repo_parts;
+        size_t                   start = 0;
+        for (size_t end = 0; (end = repository.find('/', start)) != std::string::npos; start = end + 1) {
+            repo_parts.push_back(repository.substr(start, end - start));
+        }
+
+        repo_parts.push_back(repository.substr(start));
+        if (repo_parts.size() < 3) {
+            printe("Invalid GitHub repository format\n");
+            return 1;
+        }
+
+        const std::string org          = repo_parts[0];
+        const std::string project      = repo_parts[1];
+        std::string       project_path = repo_parts[2];
+        for (size_t i = 3; i < repo_parts.size(); ++i) {
+            project_path += "/" + repo_parts[i];
+        }
+
+        const std::string url =
+            "https://raw.githubusercontent.com/" + org + "/" + project + "/" + branch + "/" + project_path;
+
+        return download(url, bn, true);
+    }
+
     std::string basename(const std::string & path) {
         const size_t pos = path.find_last_of("/\\");
         if (pos == std::string::npos) {
@@ -707,8 +741,12 @@ class LlamaData {
         } else if (string_starts_with(model_, "hf.co/")) {
             rm_until_substring(model_, "hf.co/");
             ret = huggingface_dl(model_, bn);
-        } else if (string_starts_with(model_, "https://")) {
+        } else if (string_starts_with(model_, "https://") || string_starts_with(model_, "http://")) {
             ret = download(model_, bn, true);
+        } else if (string_starts_with(model_, "github:") || string_starts_with(model_, "github://")) {
+            rm_until_substring(model_, "github://");
+            rm_until_substring(model_, "github:");
+            ret = github_dl(model_, bn);
         } else {  // ollama:// or nothing
             rm_until_substring(model_, "://");
             ret = ollama_dl(model_, bn);