Improved clone output (#28)

Author: JohanMabille

CMakeLists.txt

@@ -55,6 +55,7 @@ set(GIT2CPP_SRC
     ${GIT2CPP_SOURCE_DIR}/utils/common.hpp
     ${GIT2CPP_SOURCE_DIR}/utils/git_exception.cpp
     ${GIT2CPP_SOURCE_DIR}/utils/git_exception.hpp
+    ${GIT2CPP_SOURCE_DIR}/utils/output.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/annotated_commit_wrapper.cpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/annotated_commit_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/branch_wrapper.cpp

src/subcommand/clone_subcommand.cpp

@@ -1,6 +1,7 @@
 #include <iostream>
 
 #include "../subcommand/clone_subcommand.hpp"
+#include "../utils/output.hpp"
 #include "../wrapper/repository_wrapper.hpp"
 
 clone_subcommand::clone_subcommand(const libgit2_object&, CLI::App& app)
@@ -13,9 +14,90 @@ clone_subcommand::clone_subcommand(const libgit2_object&, CLI::App& app)
     sub->callback([this]() { this->run(); });
 }
 
+namespace
+{
+    int sideband_progress(const char* str, int len, void*)
+    {
+        printf("remote: %.*s", len, str);
+        fflush(stdout);
+        return 0;
+    }
+
+    int fetch_progress(const git_indexer_progress* stats, void* payload)
+    {
+        static bool done = false;
+
+        // We need to copy stats into payload even if the fetch is done,
+        // because the checkout_progress callback will be called with the
+        // same payload and needs the data to be up do date.
+        auto* pr = reinterpret_cast<git_indexer_progress*>(payload);
+        *pr = *stats;
+
+        if (done)
+        {
+            return 0;
+        }
+        
+        int network_percent = pr->total_objects > 0 ?
+            (100 * pr->received_objects / pr->total_objects)
+            : 0;
+        size_t mbytes = pr->received_bytes / (1024*1024);
+
+        std::cout << "Receiving objects: " << std::setw(4) << network_percent
+            << "% (" << pr->received_objects << "/" << pr->total_objects << "), "
+            << mbytes << " MiB";
+
+        if (pr->received_objects == pr->total_objects)
+        {
+            std::cout << ", done." << std::endl;
+            done = true;
+        }
+        else
+        {
+            std::cout << '\r';
+        }
+        return 0;
+    }
+
+    void checkout_progress(const char* path, size_t cur, size_t tot, void* payload)
+    {
+        static bool done = false;
+        if (done)
+        {
+            return;
+        }
+        auto* pr = reinterpret_cast<git_indexer_progress*>(payload);
+        int deltas_percent = pr->total_deltas > 0 ?
+            (100 * pr->indexed_deltas / pr->total_deltas)
+            : 0;
+
+        std::cout << "Resolving deltas: " << std::setw(4) << deltas_percent
+            << "% (" << pr->indexed_deltas << "/" << pr->total_deltas << ")";
+        if (pr->indexed_deltas == pr->total_deltas)
+        {
+            std::cout << ", done." << std::endl;
+            done = true;
+        }
+        else
+        {
+            std::cout << '\r';
+        }
+    }
+}
+
 void clone_subcommand::run()
 {
-    git_clone_options opts = GIT_CLONE_OPTIONS_INIT;
+    git_indexer_progress pd;
+    git_clone_options clone_opts = GIT_CLONE_OPTIONS_INIT;
+    git_checkout_options checkout_opts = GIT_CHECKOUT_OPTIONS_INIT;
+    checkout_opts.checkout_strategy = GIT_CHECKOUT_SAFE;
+    checkout_opts.progress_cb = checkout_progress;
+    checkout_opts.progress_payload = &pd;
+    clone_opts.checkout_opts = checkout_opts;
+	  clone_opts.fetch_opts.callbacks.sideband_progress = sideband_progress;
+	  clone_opts.fetch_opts.callbacks.transfer_progress = fetch_progress;
+	  clone_opts.fetch_opts.callbacks.payload = &pd;
+
     std::string short_name = m_directory;
     if (m_directory.empty())
     {
@@ -27,5 +109,6 @@ void clone_subcommand::run()
         m_directory = get_current_git_path() + '/' + short_name;
     }
     std::cout << "Cloning into '" + short_name + "'..." << std::endl;
-    repository_wrapper::clone(m_repository, m_directory, opts);
+    cursor_hider ch;
+    repository_wrapper::clone(m_repository, m_directory, clone_opts);
 }

src/utils/output.hpp

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <iostream>
+#include "common.hpp"
+
+// Scope object to hide the cursor. This avoids
+// cursor twinkling when rewritting the same line
+// too frequently.
+struct cursor_hider : noncopyable_nonmovable
+{
+    cursor_hider()
+    {
+        std::cout << "\e[?25l";
+    }
+
+    ~cursor_hider()
+    {
+        std::cout << "\e[?25h";
+    }
+};