Add git dependencies

1 files changed, 101 insertions, 0 deletions

diff --git a/src/GitRepository.cpp b/src/GitRepository.cpp
new file mode 100644
index 0000000..0a3b0a7
--- /dev/null
+++ b/src/GitRepository.cpp
@@ -0,0 +1,101 @@
+#include "../include/GitRepository.hpp"
+#include "../include/Dependency.hpp"
+#include <git2.h>
+#include <string>
+#include <cassert>
+
+using namespace std;
+
+static bool libgitInitialized = false;
+
+namespace sibs
+{
+    void gitInit()
+    {
+        if(!libgitInitialized)
+        {
+            libgitInitialized = true;
+            // TODO: Call git_libgit2_shutdown in destructor? dont really need to do that though
+            git_libgit2_init();
+        }
+    }
+    
+    Result<bool> buildGitError(int error, const string &errorPrefix)
+    {
+        const git_error *e = giterr_last();
+        string errMsg = errorPrefix;
+        errMsg += ": ";
+        errMsg += to_string(error);
+        errMsg += "/";
+        errMsg += to_string(e->klass);
+        errMsg += ": ";
+        errMsg += e->message;
+        return Result<bool>::Err(errMsg, error);
+    }
+    
+    Result<bool> GitRepository::clone(GitDependency *gitDependency, const FileString &repoDirPath)
+    {
+        gitInit();
+        git_repository *repo;
+        int error = git_clone(&repo, gitDependency->url.c_str(), toUtf8(repoDirPath).c_str(), NULL);
+        if(error != 0)
+            return buildGitError(error, "Failed to clone git repository");
+        
+        git_repository_free(repo);
+        return Result<bool>::Ok(true);
+    }
+    
+    Result<bool> GitRepository::pull(GitDependency *gitDependency, const FileString &repoDirPath)
+    {
+        gitInit();
+        int error;
+        
+        git_repository *repo;
+        error = git_repository_open(&repo, toUtf8(repoDirPath).c_str());
+        if(error != 0)
+            return buildGitError(error, "Failed to open git repository");
+        
+        git_remote *remote;
+        error = git_remote_lookup(&remote, repo, "origin");
+        if(error != 0)
+            return buildGitError(error, "Failed to do remote lookup for git repository");
+        
+        // TODO: Setup option to be able to use callback for progress (for output in console) and handling credentials
+        error = git_remote_fetch(remote, NULL, NULL, "pull");
+        if(error != 0)
+        {
+            Result<bool> err = buildGitError(error, "Failed to do remote fetch for git repository");
+            git_remote_free(remote);
+            git_repository_free(repo);
+            return err;
+        }
+        
+        git_reference *ref;
+        error = git_reference_dwim(&ref, repo, gitDependency->branch.c_str());
+        if(error != 0)
+        {
+            Result<bool> err = buildGitError(error, "Failed to do reference lookup for git repository");
+            git_remote_free(remote);
+            git_repository_free(repo);
+            return err;
+        }
+        
+        git_annotated_commit *annotatedCommit;
+        error = git_annotated_commit_from_ref(&annotatedCommit, repo, ref);
+        if(error != 0)
+        {
+            Result<bool> err = buildGitError(error, "Failed to get commit from ref");
+            git_annotated_commit_free(annotatedCommit);
+            git_remote_free(remote);
+            git_repository_free(repo);
+            return err;
+        }
+        
+        assert(false);
+        
+        git_annotated_commit_free(annotatedCommit);
+        git_remote_free(remote);
+        git_repository_free(repo);
+        return Result<bool>::Ok(true);
+    }
+}